swift-developers-japan - swiftbot-sandbox

@swiftbot print("hello channel")

Swift version 4.1 (swift-4.1-RELEASE) Target: x86_64-unknown-linux-gnu

5:50 AM

hello channel

@swiftbot let hoge = "hoge" dump(hoge)

Swift version 4.1 (swift-4.1-RELEASE) Target: x86_64-unknown-linux-gnu

5:53 AM

- "hoge"

Targetの出力は不変だから消して良さそう。

さっき @omochimetaru が書いてたトリプルクォートぶっ壊すので無限コンパイルされたりしないですか？

@t.ae botからbotにメンションさせるってこと？

はい。

悪い事思いつくね。

たしかにできそう

6:22 AM

Swift で Swift コードを出力してコンパイルとか…

そうかそこは実行結果だから・・・

もし可能だとすると防ぐにはbot自身の発言かどうかを見たらいいのかな。

とりあえずはそうですね。

クワインだ

2

同じようなボットがサーバーにもう一人いるときはキャッチボールできちゃうので

6:24 AM

もうひと工夫必要そうですが。

相互呼び出し末尾再帰最適化っぽい

@swiftbot print("\n``"+"`\n\n@swiftbot#4647 \n``"+"`swift\nprint(\"hello\")\n") ```

Swift version 4.1 (swift-4.1-RELEASE) Target: x86_64-unknown-linux-gnu

8:16 AM

@swiftbot#4647 print("hello") ```

@swiftbot print("hoge\n``"+"`\n\n@swiftbot#4647 \n``"+"`swift\nprint(\"hello\")\n``"+"`")

Swift version 4.1 (swift-4.1-RELEASE) Target: x86_64-unknown-linux-gnu

8:17 AM

hoge @swiftbot#4647 print("hello") ```

1

pre texts @swiftbot print("hello")

Swift version 4.1 (swift-4.1-RELEASE) Target: x86_64-unknown-linux-gnu

8:26 AM

hello

@swiftbot print("hoge\n``"+"`\n\n<@4647> \n``"+"`swift\nprint(\"hello\")\n``"+"`")

Swift version 4.1 (swift-4.1-RELEASE) Target: x86_64-unknown-linux-gnu

8:28 AM

hoge @Unknown print("hello") ```

print("hoge\n`"+"\n\n<@!swiftbot> \n`"+"swift\nprint("hello")\n`"+"")

8:32 AM

@swiftbot print("hoge\n``"+"`\n\n<@!swiftbot> \n``"+"`swift\nprint(\"hello\")\n``"+"`")

8:32 AM

@swiftbot print("hoge\n``"+"`\n\n<@!swiftbot> \n``"+"`swift\nprint(\"hello\")\n``"+"`")

Swift version 4.1 (swift-4.1-RELEASE) Target: x86_64-unknown-linux-gnu

8:32 AM

hoge <@!swiftbot> print("hello") ```

https://anidiots.guide/getting-started/your-basic-bot.html Bot同士でキャッチボールをしてしまうことの対策はちゃんと基本テクのところに書いてあった。内容はやっぱりbotの発言かどうかをチェックするとのこと。 Botceptionっていうらしい？

9:14 AM

あと私いま旅行中ですぐにSSHできないことが多いので、もし無限ループになってもすぐ止められないです。

これ、バックエンドのAPIへ普通にcurlでアクセスできちゃうのですね。

https://swift-playground.kishikawakatsumi.com API もWeb UIも公開してます。

@Kishikawa Katsumi そういえば https://swift-playground.kishikawakatsumi.com/ の初期コードの import Foundation がなくても良いように見えるのが気になってたんですが、これは Fundation が import できることを示すためとかでしょうか？

あまり深い意味はないんですけど、いういう意図もあります。あとは見栄えとか。

1

もしかしたらコードを修正する過程の消し忘れかもとも思ったので、 Foundation の何かを使ってたらわかりやすいかもしれません。 round とかの関数だと使いやすそうです。

そうですね。ちょっと考えてみます。

APIがvalidationなしにcommandをexecへ渡している様に見えるのですが、大丈夫ですか？ https://github.com/kishikawakatsumi/swift-playground/blob/master/sandbox.js#L56 (edited)

kishikawakatsumi/swift-playground

Contribute to swift-playground development by creating an account on GitHub.

SwiftとSwiftcだけにチェックすべきですね。ありがとうこざいます。

10:18 AM

どうもBot側のチェックと同じものを書く必要があると思ってたのですが、忘れてる気がしますね。

10:18 AM

コマンド以外のパラメータについても。

#### Release note:

パラメータのバリデーションを改善しました。 Thanks @norio_nomura
Botへのメンションで、コードブロックがあればswiftの言語指定がなくても実行するようにしました。
バージョン表記からTargetの行を取り除きました。
Bot自身の投稿は無視するようにしました。 Thanks @t.ae

4:00 PM

@swiftbot help

Usage: @swiftbot [--version=SWIFT_VERSION] [--command={swift, swiftc}] [--options=SWIFTC_OPTIONS] ``` [Swift Code] ``` @swiftbot versions: show available Swift toolchain versions @swiftbot contribute: show repository URLs @swiftbot help: show help

@swiftbot

Usage: @swiftbot [--version=SWIFT_VERSION] [--command={swift, swiftc}] [--options=SWIFTC_OPTIONS] ``` [Swift Code] ``` Examples: @swiftbot ``` print("Hello world!") ``` @swiftbot --version=4.0.3 ``` print("Hello world!") ``` @swiftbot --command=swiftc --options=-dump-parse ``` print("Hello world!") ``` Subcommands: @swiftbot versions: show available Swift toolchain versions @swiftbot contribute: show repository URLs @swiftbot help: show help

対応ありがとうございます。今の所メンション送る手段が見つかりませんでしたが……

12:22 AM

@swiftbot let 🐣 = "hiyoko" print("🐣 = \(🐣)")

1

Swift version 4.1 (swift-4.1-RELEASE)

12:22 AM

🐣 = hiyoko

@swiftbot versions

Available Swift versions: 2018-04-04-a 2018-04-03-a 2018-04-02-a 2018-04-01-a 2018-03-31-a 4.1 4.0.3 3.1.1 3.0.2

とりあえず最新のスナップショットを追加したのと、ショートカットで--version=latestと--version=stableというのを使えるようにしました。latestは最新のスナップショット、stableは最新のリリースバージョンが動きます。 (edited)

7:21 PM

@swiftbot --version=latest

func fibonacci(number: Int) -> Int { if number <= 1 { return number } else { return fibonacci(number: number - 1) + fibonacci(number: number - 2) } } print(fibonacci(number: 10))

Swift version 4.2-dev (LLVM 0d52728a8a, Clang b9ad4239d1, Swift a1eb1fe24c)

7:21 PM

55

@swiftbot

import Foundation func exec(_ cmd: [String]) -> String { let process = Process() process.executableURL = URL(fileURLWithPath: cmd[0]) let pipe = Pipe() process.standardOutput = pipe process.arguments = Array(cmd[1...]) try! process.run() let handle = pipe.fileHandleForReading let data = handle.readDataToEndOfFile() let str = String(data: data, encoding: .utf8) ?? "<binary>" return str } print(exec(["/bin/ls", "-al"]))

Swift version 4.1 (swift-4.1-RELEASE)

9:13 PM

/usercode/main.swift:5:5: error: value of type 'Process' has no member 'executableURL' process.executableURL = URL(fileURLWithPath: cmd[0]) ^~~~~~~ ~~~~~~~~~~~~~ /usercode/main.swift:10:10: error: value of type 'Process' has no member 'run' try! process.run() ^~~~~~~ ~~~

@swiftbot

import Foundation func exec(_ cmd: [String]) -> String { let process = Process() process.launchPath = cmd[0] let pipe = Pipe() process.standardOutput = pipe process.arguments = Array(cmd[1...]) process.launch() let handle = pipe.fileHandleForReading let data = handle.readDataToEndOfFile() process.waitUntilExit() let str = String(data: data, encoding: .utf8) ?? "<binary>" return str } print(exec(["/bin/ls", "-al"]))

Swift version 4.1 (swift-4.1-RELEASE)

9:15 PM

total 76 drwxr-xr-x 1 root root 4096 Apr 5 21:15 . drwxr-xr-x 1 root root 4096 Apr 5 21:15 .. -rwxr-xr-x 1 root root 0 Apr 5 21:15 .dockerenv drwxr-xr-x 1 root root 4096 Apr 1 12:25 bin drwxr-xr-x 2 root root 4096 Apr 12 2016 boot drwxr-xr-x 5 root root 340 Apr 5 21:15 dev drwxr-xr-x 1 root root 4096 Apr 5 21:15 etc drwxr-xr-x 2 root root 4096 Apr 12 2016 home drwxr-xr-x 1 root root 4096 Apr 1 12:26 lib drwxr-xr-x 2 root root 4096 Feb 28 19:14 lib64 drwxr-xr-x 2 root root 4096 Feb 28 19:13 media drwxr-xr-x 2 root root 4096 Feb 28 19:13 mnt drwxr-xr-x 2 root root 4096 Feb 28 19:13 opt dr-xr-xr-x 130 root root 0 Apr 5 21:15 proc drwx------ 2 root root 4096 Feb 28 19:14 root drwxr-xr-x 1 root root 4096 Feb 28 19:14 run drwxr-xr-x 1 root root 4096 Apr 1 12:25 sbin drwxr-xr-x 2 root root 4096 Feb 28 19:13 srv dr-xr-xr-x 13 root root 0 Apr 5 21:15 sys drwxrwxrwt 1 root root 4096 Apr 5 21:15 tmp drwxrwxrwx 2 1000 1000 4096 Apr 5 21:15 usercode drwxr-xr-x 1 root root 4096 Mar 29 21:57 usr drwxr-xr-x 1 root root 4096 Feb 28 19:14 var

@swiftbot

import Foundation func exec(_ cmd: [String]) -> String { let process = Process() process.launchPath = cmd[0] let pipe = Pipe() process.standardOutput = pipe process.arguments = Array(cmd[1...]) process.launch() let handle = pipe.fileHandleForReading let data = handle.readDataToEndOfFile() process.waitUntilExit() let str = String(data: data, encoding: .utf8) ?? "<binary>" return str } print(exec(["/bin/cat", ".dockerenv"]))

Swift version 4.1 (swift-4.1-RELEASE)

9:16 PM

@swiftbot

import Foundation func exec(_ cmd: [String]) -> String { let process = Process() process.launchPath = cmd[0] let pipe = Pipe() process.standardOutput = pipe process.arguments = Array(cmd[1...]) process.launch() let handle = pipe.fileHandleForReading let data = handle.readDataToEndOfFile() process.waitUntilExit() let str = String(data: data, encoding: .utf8) ?? "<binary>" return str } print(exec(["/bin/ls", "-alR", "usercode"]))

Swift version 4.1 (swift-4.1-RELEASE)

9:16 PM

usercode: total 20 drwxrwxrwx 2 1000 1000 4096 Apr 5 21:16 . drwxr-xr-x 1 root root 4096 Apr 5 21:16 .. -rw-r--r-- 1 root root 0 Apr 5 21:16 errors -rw-r--r-- 1 root root 0 Apr 5 21:16 log -rw-rw-r-- 1 1000 1000 483 Apr 5 21:16 main.swift -rwxrwxr-x 1 1000 1000 164 Apr 5 21:16 script.sh -rw-r--r-- 1 root root 71 Apr 5 21:16 version

@swiftbot

import Foundation func exec(_ cmd: [String]) -> String { let process = Process() process.launchPath = cmd[0] let pipe = Pipe() process.standardOutput = pipe process.arguments = Array(cmd[1...]) process.launch() let handle = pipe.fileHandleForReading let data = handle.readDataToEndOfFile() process.waitUntilExit() let str = String(data: data, encoding: .utf8) ?? "<binary>" return str } print(exec(["/bin/cat", "usercode/script.sh"]))

Swift version 4.1 (swift-4.1-RELEASE)

9:17 PM

#!/bin/bash swift --version > /usercode/version exec 1> "/usercode/log" exec 2> "/usercode/errors" $@ /usercode/main.swift mv /usercode/log /usercode/completed

Docker内の環境のリソースの使用を制限した方がいいかなという気もしますが、どうですかね？今は時間制限も大して厳しくはないし、踏み台的な使い方がされてしまったりするのはありそうと思っています。

ネットワークにはアクセスできないようにした方がいいかもしれませんね。

そうですね。それを制限しておけば外に迷惑をかけることはないはず？

Docker 詳しくないですが、隔離されてるのでそのはずかと。あとは CPU とかメモリの使用量を制限しておけば、時間制限もあるし、何されても大体大丈夫そうな気がします。

3:30 AM

Wandbox がどうしてるかという話が↓にありました。 https://qiita.com/melpon/items/e871abb8cd2b15558a53#%E7%89%9B%E8%88%8E

Wandboxを支える技術（2017年版） - Qiita

Wandbox は、オンラインでコンパイルや実行が試せるサービスで、主に私（@melponn）と [@kikairoya](...

週末ちょっと対策しましょ

@swiftbot

import Foundation let semaphore = DispatchSemaphore(value: 0) let url = URL(string: "http://httpbin.org/get")! let task = URLSession.shared.dataTask(with: url) { (data, response, error) in defer{ semaphore.signal() } if let error = error { print(error) return } print(response!.url!) print(String(data: data!, encoding: .utf8)!) }; task.resume() semaphore.wait()

Swift version 4.1 (swift-4.1-RELEASE)

5:59 AM

http://httpbin.org/get { "args": {}, "headers": { "Accept": "*/*", "Accept-Encoding": "deflate, gzip", "Accept-Language": "en", "Connection": "close", "Host": "httpbin.org", "User-Agent": "swift (unknown version) curl/7.47.0" }, "origin": "138.68.23.220", "url": "http://httpbin.org/get" }

普通にネットワークアクセスできるんだな。。。

3

@swiftbot print(“hello iPad”)

Swift version 4.1 (swift-4.1-RELEASE)

9:47 AM

/usercode/main.swift:1:20: error: unicode curly quote found, replace with '"' print(“hello iPad”) /usercode/main.swift:1:7: error: unicode curly quote found, replace with '"' print(“hello iPad”)

ああああ

9:49 AM

@swiftbot print("hello from iPad")

Swift version 4.1 (swift-4.1-RELEASE)

9:49 AM

hello from iPad

スマートじゃない引用符ワロタ

@swiftbot --options="format" if true { print("hello") }

Swift version 4.1 (swift-4.1-RELEASE)

3:18 PM

if true { print("hello") }

@swiftbot

import Foundation let semaphore = DispatchSemaphore(value: 0) let url = URL(string: "http://httpbin.org/get")! let task = URLSession.shared.dataTask(with: url) { (data, response, error) in defer{ semaphore.signal() } if let error = error { print(error) return } print(response!.url!) print(String(data: data!, encoding: .utf8)!) }; task.resume() semaphore.wait()

Swift version 4.1 (swift-4.1-RELEASE)

1:33 AM

URLError(_nsError: Could not resolve host: httpbin.org)

とりあえずネットワークを無効にしてみた。

1

@swiftbot import SwiftyMath

Swift version 4.1 (swift-4.1-RELEASE)

1:56 AM

/usercode/main.swift:1:8: error: no such module 'SwiftyMath' import SwiftyMath ^

1

作業中です。

すいません、つい気持ちが先走ってw

@Taketo Sano 現状のコードだとUbuntuではarc4randomがないのでビルドできなくて（arc4randomはBSDならある） https://github.com/kishikawakatsumi/SwiftyMath/commit/c5d8dc1dd1da145459477df1d2a9a60327da6c38 のようにlibbsdに依存するか、arc4randomじゃないrandom生成器を使うかのどちらかの対応が必要です。暗号的乱数でもなさそうなので依存パッケージを増やすほどでもないかなという気もしますが、ここのRandomってどういう性質のものですかね？

Add libbsd package for support arc4random() on Linux · kishikawak...

なるほど！

2:16 AM

テスト用に例えばランダムな行列を生成するのとかに使ってました。

2:16 AM

ランダムが arc4random でないといけない必要性は特にありません。

とりあえず暫定版として、

2:22 AM

@swiftbot --version=4.1a --options="-I /vendor/SwiftyMath/.build/release/ -I /usr/lib/swift/clang/include/ -I /vendor/swift-package-libbsd/ -L /vendor/SwiftyMath/.build/release/ -ldSwiftyMath" import SwiftyMath typealias F5 = IntegerQuotientRing<_5> F5.printAddTable() F5.printMulTable()

Swift version 4.1 (swift-4.1-RELEASE)

2:22 AM

+ | 0 1 2 3 4 -------------------------- 0 | 0 1 2 3 4 1 | 1 2 3 4 0 2 | 2 3 4 0 1 3 | 3 4 0 1 2 4 | 4 0 1 2 3 * | 0 1 2 3 4 -------------------------- 0 | 0 0 0 0 0 1 | 0 1 2 3 4 2 | 0 2 4 1 3 3 | 0 3 1 4 2 4 | 0 4 3 2 1

キタコレ!

@Taketo Sano あとで使い勝手はもうちょっと考えますけど、とりあえず^のように特殊なSwiftバージョンとオプションを指定して使ってみてください。そもそもやりたいことはこれで満たせるのかとか知りたいです。

@swiftbot import SwiftyTopology

Swift version 4.1 (swift-4.1-RELEASE)

2:24 AM

/usercode/main.swift:1:8: error: no such module 'SwiftyTopology' import SwiftyTopology ^

あ、なるほど

2:25 AM

今出先なので後で試してみます！

ここでインポートしてるのはdSwiftyMathなのでSwiftyTopologyは入ってるんじゃないかな。。。？

2:26 AM

@swiftbot --version=4.1a --options="-I /vendor/SwiftyMath/.build/release/ -I /usr/lib/swift/clang/include/ -I /vendor/swift-package-libbsd/ -L /vendor/SwiftyMath/.build/release/ -ldSwiftyMath" import SwiftyMath let a = 𝐐(4, 5) // 4/5 let b = 𝐐(3, 2) // 3/2 print(a + b) // 23/10

Swift version 4.1 (swift-4.1-RELEASE)

2:26 AM

23/10

Chatbotで使えるということはWebでも使えるんですけど今のところWebにはSwiftのバージョンを切り替える方法やオプションを渡す手がないですね。。。

2:29 AM

テスト用に例えばランダムな行列を生成するのとかに使ってました。

ランダムが arc4random でないといけない必要性は特にありません。なるほど。じゃあarc4randomとrandを切り替えるような実装の方が簡単でいいかな？

2:35 AM

うーん、SwiftyTopologyは含まれてないっぽいですね。。。

@swiftbot --version=4.1a --options="-I /vendor/SwiftyMath/.build/release/ -I /usr/lib/swift/clang/include/ -I /vendor/swift-package-libbsd/ -L /vendor/SwiftyMath/.build/release/ -ldSwiftyMath" import SwiftyMath import SwiftyTopology let S = SimplicialComplex.sphere(dim:3) print(S.detailDescription)

Swift version 4.1 (swift-4.1-RELEASE)

2:36 AM

S^3 { 0: v₁, v₂, v₃, v₄, v₀ 1: (v₁, v₂), (v₁, v₃), (v₂, v₃), (v₁, v₄), (v₂, v₄), (v₃, v₄), (v₀, v₂), (v₀, v₃), (v₀, v₄), (v₀, v₁) 2: (v₁, v₂, v₃), (v₁, v₂, v₄), (v₁, v₃, v₄), (v₂, v₃, v₄), (v₀, v₂, v₃), (v₀, v₂, v₄), (v₀, v₃, v₄), (v₀, v₁, v₃), (v₀, v₁, v₄), (v₀, v₁, v₂) 3: (v₁, v₂, v₃, v₄), (v₀, v₂, v₃, v₄), (v₀, v₁, v₃, v₄), (v₀, v₁, v₂, v₄), (v₀, v₁, v₂, v₃) }

あ、できた。

大丈夫です！

なるほどー

@swiftbot --version=4.1a --options="-I /vendor/SwiftyMath/.build/release/ -I /usr/lib/swift/clang/include/ -I /vendor/swift-package-libbsd/ -L /vendor/SwiftyMath/.build/release/ -ldSwiftyMath"

import SwiftyMath import SwiftyTopology let S = SimplicialComplex.sphere(dim:3) let H = Homology(S, Int.self) print(H.detailDescription)

Swift version 4.1 (swift-4.1-RELEASE)

2:37 AM

H(S^3; 𝐙) = { 0 : 𝐙, [v₄], 1 : 0, [], 2 : 0, [], 3 : 𝐙, [-1(v₀, v₁, v₃, v₄) + -1(v₁, v₂, v₃, v₄) + (v₀, v₁, v₂, v₄) + -1(v₀, v₁, v₂, v₃) + (v₀, v₂, v₃, v₄)] }

素晴らしい

chat bot で homology が計算できる時代

（何が素晴らしいのかさっぱりわかりませんが

）めっちゃ便利ですね！

1

2:39 AM

ごめんなさい。これを機会に数学を教えてください。

是非！

2:40 AM

いずれ SwiftyMath を使って Swifter 向けの数学講座をやりたいです

いいですね。とりあえずいきなりトポロジーに行くのは無理そうですね。前提となる知識がもっと必要そう。

線型代数だけで行けます！（線型代数の導入も SwiftyMath でできる予定

）

まず線形代数なんですね。私は数III数Cを学んでないのでそこからですね。

せっかく Swift で作ってるので、ベクトルを指で動かしたりしてインタラクティブに学べるようなものにしたい

(edited)

1

@swiftbot

import SwiftyMath import SwiftyTopology let S = SimplicialComplex.sphere(dim:3) let H = Homology(S, Int.self) print(H.detailDescription)

Swift version 4.1 (swift-4.1-RELEASE)

5:00 AM

H(S^3; 𝐙) = { 0 : 𝐙, [v₄], 1 : 0, [], 2 : 0, [], 3 : 𝐙, [-1(v₁, v₂, v₃, v₄) + -1(v₀, v₁, v₃, v₄) + (v₀, v₁, v₂, v₄) + (v₀, v₂, v₃, v₄) + -1(v₀, v₁, v₂, v₃)] }

お！

@Taketo Sano デフォルトでSwiftyMathをリンクするようにしました。importだけ書けばOKです。

5:04 AM

他の人には影響ないと思いますが、もし何か問題を見つけたら教えてください。デフォルトのオプションを与えているという仕組みなので、--optionsを別の何かで上書きすると以前と同じバニラのSwift環境が使えます。 SwiftyMathをリンクしているのは今の所stable (== 4.1)のみです。

上で私間違ったこと書いてて、arc4randomは明示的なシードの初期化がいらないってだけで暗号論的に安全な乱数を返すわけではないですね

rand() 使おうとしたら 'rand()' is unavailable in Swift: Use arc4random ってでますね…（それで arc4random にしたんでした） (edited)

@Kishikawa Katsumi arc4randomは暗号論的安全じゃないですか？ man arc4random

DESCRIPTION These functions use a cryptographic pseudo-random number generator to generate high quality random bytes very quickly.

drand48() は使えた。これなら Ubuntu でもビルドできるんですかね？

https://en.wikipedia.org/wiki/Cryptographically_secure_pseudorandom_number_generator よく見るのは CSPRNG ですけど CPRNGとも言うようです

Cryptographically secure pseudorandom number generator

A cryptographically secure pseudo-random number generator (CSPRNG) or cryptographic pseudo-random number generator (CPRNG) is a pseudo-random number generator (PRNG) with properties that make it suitable for use in cryptography. Most cryptographi...

ほんとだ。arc4randomってAppleのRC4実装って意味だったのか。

1

6:07 AM

@Taketo Sano やってみてください。swiftbotで実行できればOK

あ、そっかw

6:07 AM

@swiftbot print(drand48())

Swift version 4.1 (swift-4.1-RELEASE)

6:07 AM

/usercode/main.swift:1:7: error: use of unresolved identifier 'drand48' print(drand48()) ^~~~~~~

damepo

どうかな。importが足りないとかの可能性。

@swiftbot import Foundation print(drand48())

Swift version 4.1 (swift-4.1-RELEASE)

6:08 AM

3.90798504668055e-14

お！

6:09 AM

いけますね

@swiftbot import Glibc print(drand48())

Swift version 4.1 (swift-4.1-RELEASE)

6:09 AM

3.90798504668055e-14

HISTORY The original version of this random number generator used the RC4 (also known as ARC4) algorithm. In OS X 10.12 it was replaced with the NIST-approved AES cipher, and it may be replaced again in the future as cryptographic techniques advance. A good mnemonic is ``A Replacement Call for Random''.

訳すと RC4(ARC4とも言う)アルゴリズムの実装だけど OS10.12で AESに変わったし、後にまた変わるから、 A Replacement Call For Random の略として覚えると良いよ (edited)

1

drandはシードの初期化が必要かな。

6:10 AM

A Replacement Call For Random

Hahaha (edited)

@swiftbot import Foundation srand48(time(nil)) print(drand48())

Swift version 4.1 (swift-4.1-RELEASE)

6:17 AM

0.918770220204355

@swiftbot import Foundation srand48(time(nil)) print(drand48())

Swift version 4.1 (swift-4.1-RELEASE)

6:17 AM

0.272781763532297

これでいけそうですかね

6:18 AM

初期化を呼び出すタイミングはこんなんでいいんでしょうかw

private var randInit = false private func rand() -> Double { if !randInit { srand48(time(nil)) randInit = true } return drand48() }

メソッド名を後付けで別の解釈にするというのはおもしろいな。

たしかにｗ　互換性の取り方としては珍しいｗ

めっちゃ実装によったメソッド名をつけたのがそもそもアレなんだけどrandom()は名前空間自体がもういっぱいいっぱいなのでしょうがないんでしょう。

@Taketo Sano 逆にMacだと動かなそうなので、arc4randomとそれをOSで切り替えるラッパーを作ると良いです。 (edited)

1

いわゆる語呂合わせか、面白い

@omochimetaru まじですか？手元ではコンパイル通ってるんですが。

あ、ほんとですか、じゃあ大丈夫です。

@Kishikawa Katsumi arc4random 未使用版 push しました ✋ 時間のあるときにでも更新お願いします

1

@swiftbot

extension Never: ExpressibleByNilLiteral { public init(nilLiteral: ()) { self = unsafeBitCast((), to: Never.self) } } let a: Never = nil print(a)

Swift version 4.1 (swift-4.1-RELEASE)

7:39 AM

/usercode/main.swift:9:7: warning: will never be executed print(a) ^ /usercode/main.swift:7:16: note: a call to a never-returning function let a: Never = nil ^ /usercode/main.swift:2:12: warning: will never be executed public init(nilLiteral: ()) { ^ /usercode/main.swift:2:12: note: a call to a never-returning function public init(nilLiteral: ()) { ^ Segmentation fault (core dumped)

Segmentation fault!

やべえ

Xcodeのplaygroundだとこうなので

* thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=EXC_I386_GPFLT) * frame #0: 0x00007fffaba7aa9b libobjc.A.dylib`_objc_msgSend_uncached + 11 frame #1: 0x00007fff9865d231 Foundation`-[NSPlaceholderString initWithString:] + 107 frame #2: 0x00000001036ca007 PlaygroundLogger`function signature specialization <Arg[0] = Dead> of static PlaygroundLogger.LoggingPolicyStack.get() -> PlaygroundLogger.LoggingPolicyStack + 151 frame #3: 0x00000001036c3f22 PlaygroundLogger`function signature specialization <Arg[1] = Owned To Guaranteed and Exploded> of playground_log_hidden + 98 frame #4: 0x00000001036c365b PlaygroundLogger`playground_log_hidden + 27 frame #5: 0x00000001041db0a7 $__lldb_expr158`Never.init(nilLiteral=() @ scalar) at MyPlayground.playground:4

7:41 AM

libobjcなのでlinux環境だとどうなるんかなーと

まあunsafeBitCast使えば別にどんな死でも起きるでしょ (edited)

7:42 AM

CatなDogとか作り放題だし

コンパイルだけだと起こらないから実行時か。

Never作っちゃったら、いろんな前提が壊れるから終わる

@swiftbot

extension Never: ExpressibleByNilLiteral { public init(nilLiteral: ()) { self = unsafeBitCast((), to: Never.self) print("わいわい") } } let a: Never = nil print(a)

Swift version 4.1 (swift-4.1-RELEASE)

7:42 AM

/usercode/main.swift:10:7: warning: will never be executed print(a) ^ /usercode/main.swift:8:16: note: a call to a never-returning function let a: Never = nil ^ /usercode/main.swift:2:12: warning: will never be executed public init(nilLiteral: ()) { ^ /usercode/main.swift:2:12: note: a call to a never-returning function public init(nilLiteral: ()) { ^ /usr/bin/swift[0x3f24d54] /usr/bin/swift[0x3f25096] /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7fa0085a4390] /usr/lib/swift/linux/libswiftCore.so(swift_conformsToProtocol+0x30)[0x7fa004780730] /usr/lib/swift/linux/libswiftCore.so(+0x39c05f)[0x7fa00477205f] /usr/lib/swift/linux/libswiftCore.so(+0x39b82d)[0x7fa00477182d] /usr/lib/swift/linux/libswiftCore.so(+0x2e518a)[0x7fa0046bb18a] Stack dump: 0. Program arguments: /usr/bin/swift -frontend -interpret /usercode/main.swift -disable-objc-interop -I /usr/lib/swift/clang/include/ -I /vendor/SwiftyMath/.build/release/ -I /vendor/swift-package-libbsd/ -module-name main -ldSwiftyMath Segmentation fault (core dumped)

なんか変わったぞ

7:43 AM

Xcodeだと"わいわい"出てくるぞ

わいわい Playground execution failed: error: Execution was interrupted, reason: EXC_BAD_ACCESS (code=EXC_I386_GPFLT). The process has been left at the point where it was interrupted, use "thread return -x" to return to the state before expression evaluation. * thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=EXC_I386_GPFLT) * frame #0: 0x00007fffaba7c64e libobjc.A.dylib`_object_remove_assocations + 24 frame #1: 0x00007fffaba7c603 libobjc.A.dylib`objc_destructInstance + 105 frame #2: 0x000000011048e398 libswiftCore.dylib`swift_deallocClassInstance + 24 frame #3: 0x000000011048e2f0 libswiftCore.dylib`_swift_release_dealloc + 16 frame #4: 0x000000010e437012 PlaygroundLogger`function signature specialization <Arg[0] = Dead> of static PlaygroundLogger.LoggingPolicyStack.get() -> PlaygroundLogger.LoggingPolicyStack + 162 frame #5: 0x000000010e430f22 PlaygroundLogger`function signature specialization <Arg[1] = Owned To Guaranteed and Exploded> of playground_log_hidden + 98 frame #6: 0x000000010e43065b PlaygroundLogger`playground_log_hidden + 27 frame #7: 0x000000010e4680af $__lldb_expr160`Never.init(nilLiteral=() @ scalar) at MyPlayground.playground:4

Unsafe bit castでDogをCatに改造すると

7:46 AM

結構面白いことになる

同じシグネチャのメソッドならそのまま呼び出せるみたいなね。

var foo: Foo { return x } と func foo() -> Foo { return x }の扱いが、前者はフィールドとして定義されているのでunsafeBitCastしても同じものが呼ばれるが、後者は実質的には第一引数にselfを与えるstatic funcなのでunsafeBitCastで違うものが呼ばれる、とか。

var foo: Foo { return x } じゃなくて let foo: Foo = x だった。

8:25 AM

@swiftbot

struct Cat { let face: String = "😺" func bark() -> String { return "にゃーん" } } struct Dog { let face: String = "🐶" func bark() -> String { return "わんわん" } } let cat = unsafeBitCast(Dog(), to: Cat.self) print(cat.face) print(cat.bark())

Swift version 4.1 (swift-4.1-RELEASE)

8:25 AM

🐶 にゃーん

@swiftbot

struct Cat { let face: String = "😺" func bark() -> String { return "\(face): にゃーん" } } struct Dog { let face: String = "🐶" func bark() -> String { return "\(face): わんわん" } } let cat = unsafeBitCast(Dog(), to: Cat.self) print(cat.face) print(cat.bark())

Swift version 4.1 (swift-4.1-RELEASE)

8:28 AM

🐶 🐶: にゃーん

@swiftbot

struct Cat { let face: String = "😺" func bark() -> String { return "\(face): にゃーん" } } struct Dog { let face: String = "🐶" func bark() -> String { return "\(face): わんわん" } } let cat = unsafeBitCast(Dog(), to: Cat.self) print(cat.bark())

Swift version 4.1 (swift-4.1-RELEASE)

8:28 AM

🐶: にゃーん

ははは

これは正しい挙動でいいんですよね？

letで定数として定義しても、値に対してのプロパティなら、ちゃんと値に対してメモリ確保されてるのがわかる。正しいと思います。

structのメソッド呼び出しは非仮想だから cat. の型に関係なく固定でcat用のメソッドが呼ばれてますね (edited)

8:31 AM

unsafeBitCastの使用自体が正しくないから、その時点で何も正しくないともいえるし、その行を正しいとみなすなら何も壊れてない

そもそもStructのメソッド呼び出しは動的ディスパッチにすると無駄すぎなので

8:31 AM

あとはletでちゃんとメモリ確保されてるなーというのがわかるのその2

8:31 AM

@swiftbot

struct One { let one = 1 } struct OneTwoThree { let one = 1 let two = 2 let three = 3 } print(MemoryLayout.size(ofValue: One())) print(MemoryLayout.size(ofValue: OneTwoThree()))

Swift version 4.1 (swift-4.1-RELEASE)

8:31 AM

8 24

たしかに意味的にはオブジェクト内部に値持つ必要はないよな

そうそう、ちょっと気になった。持たないといけない理由あるのかなーとか

8:33 AM

ABI互換とかはどうなんだろう

あー

8:34 AM

リザイレンスでは

8:34 AM

letでもgetterになっていて

8:34 AM

ABI互換を取りたいかも？

8:34 AM

あ、でもstructだとそもそもサイズが変わっちゃって無理か。

うん、気になったのはletがちゃんとpropertyとして成立していて

8:35 AM

でもこれCodableからは除去されるんだよね

8:35 AM

だからその辺上手いことやってるのはどこに仕掛けがあるんやろか、って思った

Codableはまあゴリゴリ書かれてるからletは除外してるんじゃないか

8:36 AM

そもそもそのケースってinitから代入もできないから

8:36 AM

CodableでDecodeしようがなくない

8:36 AM

あれ、できるっけ

initで定義されるletとフィールドに直埋めのletがCodableでは違う扱いになってるのが (edited)

8:36 AM

しかしメモリレイアウトは同じだった、っていう点がおもろい

@swiftbot struct Cat { let age: Int = 3 init() { self.age = 5 } } print(Cat())

Swift version 4.1 (swift-4.1-RELEASE)

8:37 AM

/usercode/main.swift:5:18: error: immutable value 'self.age' may only be initialized once self.age = 5 ^ /usercode/main.swift:2:9: note: initial value already provided in 'let' declaration let age: Int = 3 ^ /usercode/main.swift:2:5: note: change 'let' to 'var' to make it mutable let age: Int = 3 ^~~ var

letで書いておけば、あとでvarになったときにも

8:40 AM

メモリレイアウト互換性が保たれるっていう

8:40 AM

ABI仕様があれば、実用性もある仕様になると思う

8:41 AM

https://swift.org/abi-stability/#data-layout

Swift.org

Swift is a general-purpose programming language built using a modern approach to safety, performance, and software design patterns.

ふむふむ

いまはまだ

8:41 AM

特に確定してない

8:41 AM

Define layout algorithms for structs

docker-compose使ってローカルのDockerで岸川さんのswift-playgroundを実行できる様になった。

@norio_nomura Docker in dockerになります？

イメージの重複が嫌だったのでホストとソケット共有です。

Macから、ホストとなるDocker（A）でLinuxを動かして、その中でリクエストごとのDocker（B）を起動して、AのソケットをBと共有、ですか？ (edited)

docker-compose.yml

version: '3' services: playground: build: . environment: HOST_PWD: ${PWD} ports: - "80:8080" volumes: - /var/run/docker.sock:/var/run/docker.sock - .:/playground command: ["sh", "-c", "npm install && npm start"]

Dockerfile FROM docker:latest RUN apk --update add bash nodejs && rm -rf /var/cache/apk/* WORKDIR /playground

1

5:01 AM

githubへ上げた方が早いね。

前に似たようなことをしようとした時、Playgroundが都度起動するDockerのoutput（/usercode/completeとerrors）がうまく外のDockerから取れなかったんですけど、そこうまくいってます？ (edited)

https://github.com/kishikawakatsumi/swift-playground/compare/master...norio-nomura:docker-compose

kishikawakatsumi/swift-playground

Contribute to swift-playground development by creating an account on GitHub.

5:04 AM

環境変数HOST_PWDにホストのディレクトリを持たせ、それをsandboxに渡してます。

5:05 AM

host_root_dir https://github.com/kishikawakatsumi/swift-playground/compare/master...norio-nomura:docker-compose#diff-43450aedbe9974516644e4098649dcbfR57

kishikawakatsumi/swift-playground

Contribute to swift-playground development by creating an account on GitHub.

5:07 AM

run.shの起動は

/playground/run.sh 30 -v /Users/norio/github/swift-playground/temp/6e4fd5db976425e7d17a:/usercode -v /playground/vendor:/vendor:ro norionomura/swiftlint:swift-4.1 sh /usercode/script.sh swift

な感じに。

5:11 AM

docker:dindにすればホストのパスは要らないけど、docker:dindだとホストの/var/lib/docker/volumesにデータが溜まっていくらしく、それを避けたかった。

なるほど。Docker comopseで全部まとめてセットアップできると便利ですね。これをベースにNginxとSSLもまとめると、GitHubのPRベースで誰でもSwiftbotに自分の好きなフレームワークを追加したりできるかな？

最初はDinDのコンテナもあったのですが、結局HOST_PWDの自動取得くらいにしかdocker-composeを活かせてないですね。

とりあえず、optionsがexecへ文字列結合されて渡されてるところが心配。

5:43 AM

options="; docker run -v /:/host_root ubuntu cat /host_root/etc/passwd;"とかすると、そのまま実行されてしまわないかな？

optionsは検討の余地ありですね。swiftcと任意のオプション、を使えると便利かなと思ったけど、今までで使われてるのはバージョン指定くらいだから任意のオプションはナシにしてもいいかも。

一応使う手順を書いておくと

docker pull norionomura/swiftlint:swift-4.1 # 利用するswiftイメージをあらかじめpull git clone https://github.com/norio-nomura/swift-playground.git -b docker-compose cd swift-playground docker-compose up

してブラウザで http://localhost を開く。

@swiftbot

func hoge() -> Never { return unsafeBitCast((), to: Never.self) } let voidNever = unsafeBitCast((), to: Never.self) // ① guard 1 == 0 else { hoge() } print("hello")

Swift version 4.1 (swift-4.1-RELEASE)

4:13 AM

/usercode/main.swift:11:7: warning: will never be executed print("hello") ^ /usercode/main.swift:7:7: note: condition always evaluates to false guard 1 == 0 else { ^ Fatal error: Can't unsafeBitCast between types of different sizes Current stack trace: 0 libswiftCore.so 0x00007fcacbd63750 _swift_stdlib_reportFatalError + 171 1 libswiftCore.so 0x00007fcacbad1ad6 <unavailable> + 1366742 2 libswiftCore.so 0x00007fcacbd0c383 <unavailable> + 3703683 3 libswiftCore.so 0x00007fcacbad1ad6 <unavailable> + 1366742 4 libswiftCore.so 0x00007fcacbc3dd80 <unavailable> + 2858368 5 libswiftCore.so 0x00007fcacbad16b0 _fatalErrorMessage(_:_:file:line:flags:) + 19 7 swift 0x0000000000fed1ce <unavailable> + 12505550 8 swift 0x0000000000ff1692 <unavailable> + 12523154 9 swift 0x00000000004d9076 <unavailable> + 888950 10 swift 0x00000000004c35d3 <unavailable> + 800211 11 swift 0x00000000004beecc <unavailable> + 782028 12 swift 0x00000000004778c4 <unavailable> + 489668 13 libc.so.6 0x00007fcace27c740 __libc_start_main + 240 14 swift 0x0000000000475179 <unavailable> + 479609 /usr/bin/swift[0x3f24d54] /usr/bin/swift[0x3f25096] /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7fcacfb52390] /usr/lib/swift/linux/libswiftCore.so(+0x2b9d80)[0x7fcacbc3dd80] /usr/lib/swift/linux/libswiftCore.so(_T0s18_fatalErrorMessages5NeverOs12StaticStringV_A2E4fileSu4lines6UInt32V5flagstF+0x13)[0x7fcacbad16c3] [0x7fcacff820ec] /usr/bin/swift[0xfed1ce] /usr/bin/swift[0xff1692] /usr/bin/swift[0x4d9076] /usr/bin/swift[0x4c35d3] /usr/bin/swift[0x4beecc] /usr/bin/swift[0x4778c4] ...

4:13 AM

stderr.txt

2.27 KB

@swiftbot

func hoge() -> Never { return unsafeBitCast((), to: Never.self) } let voidNever = unsafeBitCast((), to: Never.self) // ① //guard 1 == 0 else { // hoge() //} print("hello")

Swift version 4.1 (swift-4.1-RELEASE)

4:14 AM

hello

guardのあるなしで①の行が実行時にクラッシュするかどうか変わる

4:14 AM

なんですかこれは

@swiftbot

func hoge() -> Never { return unsafeBitCast((), to: Never.self) } let voidNever = unsafeBitCast((), to: Never.self) // ① hoge() print("hello")

Swift version 4.1 (swift-4.1-RELEASE)

4:16 AM

/usercode/main.swift:9:7: warning: will never be executed print("hello") ^ /usercode/main.swift:7:1: note: a call to a never-returning function hoge() ^ Fatal error: Can't unsafeBitCast between types of different sizes Current stack trace: 0 libswiftCore.so 0x00007fc5595c8750 _swift_stdlib_reportFatalError + 171 1 libswiftCore.so 0x00007fc559336ad6 <unavailable> + 1366742 2 libswiftCore.so 0x00007fc559571383 <unavailable> + 3703683 3 libswiftCore.so 0x00007fc559336ad6 <unavailable> + 1366742 4 libswiftCore.so 0x00007fc5594a2d80 <unavailable> + 2858368 5 libswiftCore.so 0x00007fc5593366b0 _fatalErrorMessage(_:_:file:line:flags:) + 19 7 swift 0x0000000000fed1ce <unavailable> + 12505550 8 swift 0x0000000000ff1692 <unavailable> + 12523154 9 swift 0x00000000004d9076 <unavailable> + 888950 10 swift 0x00000000004c35d3 <unavailable> + 800211 11 swift 0x00000000004beecc <unavailable> + 782028 12 swift 0x00000000004778c4 <unavailable> + 489668 13 libc.so.6 0x00007fc55bae1740 __libc_start_main + 240 14 swift 0x0000000000475179 <unavailable> + 479609 /usr/bin/swift[0x3f24d54] /usr/bin/swift[0x3f25096] /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7fc55d3b7390] /usr/lib/swift/linux/libswiftCore.so(+0x2b9d80)[0x7fc5594a2d80] /usr/lib/swift/linux/libswiftCore.so(_T0s18_fatalErrorMessages5NeverOs12StaticStringV_A2E4fileSu4lines6UInt32V5flagstF+0x13)[0x7fc5593366c3] [0x7fc55d7e708c] /usr/bin/swift[0xfed1ce] /usr/bin/swift[0xff1692] /usr/bin/swift[0x4d9076] /usr/bin/swift[0x4c35d3] /usr/bin/swift[0x4beecc] /usr/bin/swift[0x4778c4] ...

4:16 AM

stderr.txt

2.25 KB

guard関係ある？hogeの呼び出しで落ちるというだけじゃない。

あー、guardは関係ないか。

4:16 AM

①の行で落ちるのがおかしくない？

4:16 AM

hoge()の中で落ちるんじゃないの　って感じ

4:17 AM

voidNeverの生成自体が削除されてるのかな

ここで落ちましたってマーカーつく場所がおかしい？

その可能性もある

4:19 AM

@swiftbot let voidNever = unsafeBitCast((), to: Never.self) // ① print("hello")

Swift version 4.1 (swift-4.1-RELEASE)

4:19 AM

hello

@swiftbot func f() { let voidNever = unsafeBitCast((), to: Never.self) // ① print("hello") } f()

Swift version 4.1 (swift-4.1-RELEASE)

4:20 AM

hello

4:20 AM

/usercode/main.swift:2:5: warning: initialization of immutable value 'voidNever' was never used; consider replacing with assignment to '_' or removing it let voidNever = unsafeBitCast((), to: Never.self) // ①

returnするときに評価が走るからそのタイミングで落ちる

@swiftbot help

Usage: @swiftbot [--version=SWIFT_VERSION] [--command={swift, swiftc}] [--options=SWIFTC_OPTIONS] ``` [Swift Code] ``` Examples: @swiftbot ``` print("Hello world!") ``` @swiftbot --version=4.0.3 ``` print("Hello world!") ``` @swiftbot --command=swiftc --options=-dump-parse ``` print("Hello world!") ``` Subcommands: @swiftbot versions: show available Swift toolchain versions @swiftbot contribute: show repository URLs @swiftbot help: show help

@swiftbot

func hoge() -> Never { return unsafeBitCast((), to: Never.self) // 落ちるならこっちじゃないの } _ = unsafeBitCast((), to: Never.self) // ここで落ちる hoge()

Swift version 4.1 (swift-4.1-RELEASE)

4:20 AM

Fatal error: Can't unsafeBitCast between types of different sizes Current stack trace: 0 libswiftCore.so 0x00007f380f961750 _swift_stdlib_reportFatalError + 171 1 libswiftCore.so 0x00007f380f6cfad6 <unavailable> + 1366742 2 libswiftCore.so 0x00007f380f90a383 <unavailable> + 3703683 3 libswiftCore.so 0x00007f380f6cfad6 <unavailable> + 1366742 4 libswiftCore.so 0x00007f380f83bd80 <unavailable> + 2858368 5 libswiftCore.so 0x00007f380f6cf6b0 _fatalErrorMessage(_:_:file:line:flags:) + 19 7 swift 0x0000000000fed1ce <unavailable> + 12505550 8 swift 0x0000000000ff1692 <unavailable> + 12523154 9 swift 0x00000000004d9076 <unavailable> + 888950 10 swift 0x00000000004c35d3 <unavailable> + 800211 11 swift 0x00000000004beecc <unavailable> + 782028 12 swift 0x00000000004778c4 <unavailable> + 489668 13 libc.so.6 0x00007f3811e7a740 __libc_start_main + 240 14 swift 0x0000000000475179 <unavailable> + 479609 /usr/bin/swift[0x3f24d54] /usr/bin/swift[0x3f25096] /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7f3813750390] /usr/lib/swift/linux/libswiftCore.so(+0x2b9d80)[0x7f380f83bd80] /usr/lib/swift/linux/libswiftCore.so(_T0s18_fatalErrorMessages5NeverOs12StaticStringV_A2E4fileSu4lines6UInt32V5flagstF+0x13)[0x7f380f6cf6c3] [0x7f3813b80080] /usr/bin/swift[0xfed1ce] /usr/bin/swift[0xff1692] /usr/bin/swift[0x4d9076] /usr/bin/swift[0x4c35d3] /usr/bin/swift[0x4beecc] /usr/bin/swift[0x4778c4] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0)[0x7f3811e7a830] /usr/bin/swift[0x475179] Stack dump: ...

4:20 AM

stderr.txt

2.1 KB

@swiftbot --command="swiftc" --options="-emit-silgen" let voidNever = unsafeBitCast((), to: Never.self) // ① print("hello") (edited)

Swift version 4.1 (swift-4.1-RELEASE)

4:21 AM

<unknown>:0: error: option '-emit-silgen' is not supported by 'swift'; did you mean to use 'swiftc'?

@swiftbot

func hoge() -> Never { print(3) return unsafeBitCast((), to: Never.self) // 落ちるならこっちじゃないの } print(1) _ = unsafeBitCast((), to: Never.self) // ここで落ちる print(2) hoge() print(4)

Swift version 4.1 (swift-4.1-RELEASE)

4:21 AM

/usercode/main.swift:10:7: warning: will never be executed print(4) ^ /usercode/main.swift:9:1: note: a call to a never-returning function hoge() ^ Fatal error: Can't unsafeBitCast between types of different sizes Current stack trace: 0 libswiftCore.so 0x00007fecfce05750 _swift_stdlib_reportFatalError + 171 1 libswiftCore.so 0x00007fecfcb73ad6 <unavailable> + 1366742 2 libswiftCore.so 0x00007fecfcdae383 <unavailable> + 3703683 3 libswiftCore.so 0x00007fecfcb73ad6 <unavailable> + 1366742 4 libswiftCore.so 0x00007fecfccdfd80 <unavailable> + 2858368 5 libswiftCore.so 0x00007fecfcb736b0 _fatalErrorMessage(_:_:file:line:flags:) + 19 7 swift 0x0000000000fed1ce <unavailable> + 12505550 8 swift 0x0000000000ff1692 <unavailable> + 12523154 9 swift 0x00000000004d9076 <unavailable> + 888950 10 swift 0x00000000004c35d3 <unavailable> + 800211 11 swift 0x00000000004beecc <unavailable> + 782028 12 swift 0x00000000004778c4 <unavailable> + 489668 13 libc.so.6 0x00007fecff31e740 __libc_start_main + 240 14 swift 0x0000000000475179 <unavailable> + 479609 /usr/bin/swift[0x3f24d54] /usr/bin/swift[0x3f25096] /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7fed00bf4390] /usr/lib/swift/linux/libswiftCore.so(+0x2b9d80)[0x7fecfccdfd80] /usr/lib/swift/linux/libswiftCore.so(_T0s18_fatalErrorMessages5NeverOs12StaticStringV_A2E4fileSu4lines6UInt32V5flagstF+0x13)[0x7fecfcb736c3] [0x7fed010241ae] /usr/bin/swift[0xfed1ce] /usr/bin/swift[0xff1692] /usr/bin/swift[0x4d9076] /usr/bin/swift[0x4c35d3] /usr/bin/swift[0x4beecc] /usr/bin/swift[0x4778c4] ...

4:21 AM

stderr.txt

2.25 KB

@swiftbot --command="swiftc" --options="-emit-silgen" let voidNever = unsafeBitCast((), to: Never.self) // ① print("hello")

Swift version 4.1 (swift-4.1-RELEASE)

4:22 AM

sil_stage raw import Builtin import Swift import SwiftShims // voidNever sil_global hidden [let] @_T04main9voidNevers0C0Ovp : $Never // main sil @main : $@convention(c) (Int32, UnsafeMutablePointer<Optional<UnsafeMutablePointer<Int8>>>) -> Int32 { bb0(%0 : $Int32, %1 : $UnsafeMutablePointer<Optional<UnsafeMutablePointer<Int8>>>): alloc_global @_T04main9voidNevers0C0Ovp // id: %2 %3 = global_addr @_T04main9voidNevers0C0Ovp : $*Never // user: %10 %4 = tuple () // user: %6 %5 = alloc_stack $() // users: %11, %10, %6 store %4 to [trivial] %5 : $*() // id: %6 %7 = metatype $@thin Never.Type %8 = metatype $@thick Never.Type // user: %10 // function_ref unsafeBitCast<A, B>(_:to:) %9 = function_ref @_T0s13unsafeBitCastq_x_q_m2totr0_lF : $@convention(thin) <τ_0_0, τ_0_1> (@in τ_0_0, @thick τ_0_1.Type) -> @out τ_0_1 // user: %10 %10 = apply %9<(), Never>(%3, %5, %8) : $@convention(thin) <τ_0_0, τ_0_1> (@in τ_0_0, @thick τ_0_1.Type) -> @out τ_0_1 dealloc_stack %5 : $*() // id: %11 %12 = integer_literal $Builtin.Word, 1 // user: %14 // function_ref _allocateUninitializedArray<A>(_:) %13 = function_ref @_T0s27_allocateUninitializedArraySayxG_BptBwlF : $@convention(thin) <τ_0_0> (Builtin.Word) -> (@owned Array<τ_0_0>, Builtin.RawPointer) // user: %14 %14 = apply %13<Any>(%12) : $@convention(thin) <τ_0_0> (Builtin.Word) -> (@owned Array<τ_0_0>, Builtin.RawPointer) // users: %20, %19, %15 %15 = begin_borrow %14 : $(Array<Any>, Builtin.RawPointer) // users: %19, %18, %16 %16 = tuple_extract %15 : $(Array<Any>, Builtin.RawPointer), 0 // user: %17 %17 = copy_value %16 : $Array<Any> // user: %35 %18 = tuple_extract %15 : $(Array<Any>, Builtin.RawPointer), 1 // user: %21 ...

4:22 AM

stdout.txt

5.11 KB

@swiftbot --command="swiftc" --options="--emit-silgen"

func hoge() -> Never { return unsafeBitCast((), to: Never.self) } let voidNever = unsafeBitCast((), to: Never.self) // ① hoge() print("hello")

Swift version 4.1 (swift-4.1-RELEASE)

4:23 AM

<unknown>:0: error: unknown argument: '--emit-silgen'

@swiftbot --command="swiftc" --options="-emit-silgen"

ｗ

@swiftbot --command="swiftc" --options="-emit-silgen"

func hoge() -> Never { return unsafeBitCast((), to: Never.self) } let voidNever = unsafeBitCast((), to: Never.self) // ① hoge() print("hello")

Swift version 4.1 (swift-4.1-RELEASE)

4:23 AM

sil_stage raw import Builtin import Swift import SwiftShims // voidNever sil_global hidden [let] @_T04main9voidNevers0C0Ovp : $Never // main sil @main : $@convention(c) (Int32, UnsafeMutablePointer<Optional<UnsafeMutablePointer<Int8>>>) -> Int32 { bb0(%0 : $Int32, %1 : $UnsafeMutablePointer<Optional<UnsafeMutablePointer<Int8>>>): alloc_global @_T04main9voidNevers0C0Ovp // id: %2 %3 = global_addr @_T04main9voidNevers0C0Ovp : $*Never // user: %10 %4 = tuple () // user: %6 %5 = alloc_stack $() // users: %11, %10, %6 store %4 to [trivial] %5 : $*() // id: %6 %7 = metatype $@thin Never.Type %8 = metatype $@thick Never.Type // user: %10 // function_ref unsafeBitCast<A, B>(_:to:) %9 = function_ref @_T0s13unsafeBitCastq_x_q_m2totr0_lF : $@convention(thin) <τ_0_0, τ_0_1> (@in τ_0_0, @thick τ_0_1.Type) -> @out τ_0_1 // user: %10 %10 = apply %9<(), Never>(%3, %5, %8) : $@convention(thin) <τ_0_0, τ_0_1> (@in τ_0_0, @thick τ_0_1.Type) -> @out τ_0_1 dealloc_stack %5 : $*() // id: %11 // function_ref hoge() %12 = function_ref @_T04main4hoges5NeverOyF : $@convention(thin) () -> Never // user: %13 %13 = apply %12() : $@convention(thin) () -> Never %14 = integer_literal $Builtin.Word, 1 // user: %16 // function_ref _allocateUninitializedArray<A>(_:) %15 = function_ref @_T0s27_allocateUninitializedArraySayxG_BptBwlF : $@convention(thin) <τ_0_0> (Builtin.Word) -> (@owned Array<τ_0_0>, Builtin.RawPointer) // user: %16 %16 = apply %15<Any>(%14) : $@convention(thin) <τ_0_0> (Builtin.Word) -> (@owned Array<τ_0_0>, Builtin.RawPointer) // users: %22, %21, %17 %17 = begin_borrow %16 : $(Array<Any>, Builtin.RawPointer) // users: %21, %20, %18 %18 = tuple_extract %17 : $(Array<Any>, Builtin.RawPointer), 0 // user: %19 ...

4:23 AM

stdout.txt

6.32 KB

Fatal error: Can't unsafeBitCast between types of different sizes

4:25 AM

うーん、このメッセージなんだろう。

サイズが違う

これはメモリレイアウト上のサイズが違う

4:26 AM

実際は違うはず無いんだけどね。

いや、そのメッセージが出たり出なかったりするのが

VoidとNeverだしどっちも0

なぜだろう

あー

わからん。

https://github.com/apple/swift/blob/c35d508600516b892732e2fd3f0f0a17ca4562ba/stdlib/public/core/Builtin.swift#L83-L87

apple/swift

swift - The Swift Programming Language

4:27 AM

preconditionだな

4:27 AM

@swiftbot print(MemoryLayout<()>.size) print(MemoryLayout<Never>.size)

Swift version 4.1 (swift-4.1-RELEASE)

4:27 AM

0 0

@swiftbot enum Fruit { case apple } print(MemoryLayout<Fruit>.size)

Swift version 4.1 (swift-4.1-RELEASE)

4:28 AM

0

うーん？

関係ないけどcase1個のenumもサイズ0って最近しった。

うむ

4:29 AM

値が一個しか無い型は0バイトにできる (edited)

@swiftbot func a() { func b(_ a: Int) {} func b(_ a: String) {} }

Swift version 4.1 (swift-4.1-RELEASE)

8:47 AM

/usercode/main.swift:3:8: error: definition conflicts with previous value func b(_ a: String) {} ^ /usercode/main.swift:2:8: note: previous definition of 'b' is here func b(_ a: Int) {} ^

https://bugs.swift.org/browse/SR-4050 たぶん容易に回避できるので放置プレイとなっております。

おお Reporter: rintaro Rintaro Ishizaki

@norio_nomura 根本的な対応じゃないですが、コマンドインジェクションの恐れのある文字列をBanするようにしました。

1

1:28 PM

@swiftbot --command=swift --options="; docker run -v /:/host_root ubuntu cat /host_root/etc/passwd;" print("a")

Invalid control characters found

ドキュメントを読む限りexecFileでshellオプションを使わないならサニタイズ不要にも思えます。 https://nodejs.org/api/child_process.html#child_process_child_process_execfile_file_args_options_callback

@swiftbot --version=4.0.3

protocol Widget { func print() func clone() -> Self } extension Widget { func print() { Swift.print("a widget of type \(Self.self)") } func clone() -> Self { return self } } class Box<Element> : Widget { init(value: Element) { self.contents = value } let contents: Element // Default implementation of print() is OK! // You must define this, or conformance checking fails on Swift 4.0.x: // func clone() -> Self { return self } } class Crate<T> : Box<T> { override init(value: T) { super.init(value: value) } } let c = Crate<Int>(value: 3) c.print() // prints: a widget of type Crate<Int>

Swift version 4.0.3 (swift-4.0.3-RELEASE)

1:04 AM

/usercode/main.swift:8:10: error: method 'clone()' in non-final class 'Box<Element>' must return `Self` to conform to protocol 'Widget' func clone() -> Self { return self } ^

@swiftbot

protocol Widget { func print() func clone() -> Self } extension Widget { func print() { Swift.print("a widget of type \(Self.self)") } func clone() -> Self { return self } } class Box<Element> : Widget { init(value: Element) { self.contents = value } let contents: Element // Default implementation of print() is OK! // You must define this, or conformance checking fails on Swift 4.0.x: // func clone() -> Self { return self } } class Crate<T> : Box<T> { override init(value: T) { super.init(value: value) } } let c = Crate<Int>(value: 3) c.print() // prints: a widget of type Crate<Int>

Swift version 4.1 (swift-4.1-RELEASE)

1:05 AM

a widget of type Crate<Int>

1

SwiftBotに、同じソースを複数のSwiftバージョンで実行した結果を一度で得られる仕組みがあると、バージョンによる挙動の違いを示し易くなる。

バージョンを複数渡せるようにしますかね。

3:00 AM

child_process.execFileでよさそうですね。

3:02 AM

--version=stable...latestや--version=3...4.1のように書けたらいいのかな？

... だとその間のバージョンで対応してるもの全部って感じですか？カンマ区切りで明示的な配列指定を想像していましたけど

確かに。 --version="4.0.3, 4.1, latest" こんな感じかな。 (edited)

3:13 AM

なんとなくstable...latest で上のように展開されるという思い込みと、カンマだとおそらくクオートで囲む必要がありそうで、それを避けたかった感じ。

--version=4.0.3,4.1,latest みたいにスペースなくしても " っていりますっけ？ (edited)

--version=4.0.3,4.1 これがいけるとちょっと入力しやすくて嬉しいです

たぶんOK

[omochi@omochi-iMac-PC43 temp]$ cat a.bash for arg in "$@"; do echo "[$arg]" done [omochi@omochi-iMac-PC43 temp]$ ./a.bash --version=4.0.3,4.1 [--version=4.0.3,4.1]

3:17 AM

bashのパーサーはそのように動くっぽい。

まずyargs-parserというParserを通していて、これがどう解釈するかですね。オプションの形式が--xなのもこのライブラリのデフォルトによります。 https://github.com/kishikawakatsumi/swift-compiler-discord-bot/blob/master/app.js#L87

kishikawakatsumi/swift-compiler-discord-bot

Contribute to swift-compiler-discord-bot development by creating an account on GitHub.

3:20 AM

たぶん調整できるんでしょうけど。

3:22 AM

Mac環境でも実行できると便利だなーと思っていて、 https://www.macstadium.com を共同で使うという企画を進めようかなと。

jlanford

MacStadium - Dedicated Mac Hosting, Colocation, and Cloud Solutions

The world's largest hosting provider of dedicated Apple Mac computers with dedicated server rentals, colocation, and hosted Mac private cloud solutions.

3:23 AM

MacProにVNCで入れるはずなので、他の参加者としてはSwiftのデバッグとビルドにローカルマシンが非力だと思う人を想定しています。

execFileを使っても、run.shの中でどう解釈されるか、によるかも。>サニタイズ要・不要

3:42 AM

docker内で起動されるスクリプトへ全部渡ってしまうならOKかな。

そうですね。そこが一番問題のコードです。

3:43 AM

のむらさんの指摘はdocker runコマンドの実行をオプションに渡す文字列で止めて、かつそのあとに任意の処理が実行できるんじゃないなということですよね。たぶんできたんじゃないかな。

run.shとは別のプロセスが起動できそうだと思ったのです。>exec使用 (edited)

そこですか。そこは、どうかな。できるのかな。

3:46 AM

node内の実行はいちおう、各パラメータを分割した形で渡せるものを使ってるから、大丈夫かなと。

こうすると、script.shを実行した上で別途testってファイルを作れます。

const exec = require('child_process').exec; const options = "& echo hello>test"; exec(['sh', 'script.sh', [options].join(' ')].join(' '));

3:55 AM

joinでつなぐやり方はsandbox.jsで使われてるのと同じ。

あ〜

3:57 AM

execに渡す時にもう一回文字列化してるから

3:57 AM

そこで配列要素としての区切りが消えてる

残念だ。

dockerに入れたnodeで実行しようと考えたきっかけです。

じゃあまあ怪しい文字列をBanするのは必要かな。

3:59 AM

私もそうしたいんですけどね。Docker in Dockerがちょっと大変なのがやっぱり気になりますね。

文字列化しないでexecFileを使えばサニタイズ無くても大丈夫かも？ → しかしrun.shの中での扱いは大丈夫？といった流れ。 (edited)

run.shの中は一番怪しい。

Mac環境でも実行できると便利だなーと思っていて、 https://www.macstadium.com/ を共同で使うという企画を進めようかなと。

ところでこれ乗る人多そう。

jlanford

MacStadium - Dedicated Mac Hosting, Colocation, and Cloud Solutions

The world's largest hosting provider of dedicated Apple Mac computers with dedicated server rentals, colocation, and hosted Mac private cloud solutions.

@kitasuke @omochimetaru と私、あと何人いるかな。

申し訳ないが僕は自分で持ってるiMacProのほうが充分強いので要らないのです

それはいらないですね

4:08 AM

あと話してたのは @d_date さんだったかな。私自身は別にProじゃなくてMac miniのホスティングでもいいといえばいいんですよね。 (edited)

1

@ukitaka @ikesyo @ezura @nafu @moaible あたりはどうかな・・・

私は非力だから乗りたいです！

@ezura Discordのアイコン設定しませんか？ezura違いだったらどうしようかとドキドキした

たしかに。了解です！

4:23 AM

私になった

3

過去の発言にアイコンが反映されなかったけど、

4:26 AM

再起動したら反映された。

再起動

こうなるの、とてもよく気持ちがわかる。

お、自分も非力マシンしかないのでぜひ

僕は会社でiMac Pro買ってもらえることになったので不要です！

1

マジ！ｗ

iMac Pro流行してるｗ

(いいなぁ)

LINEも申請すればいけそうな感じが外部の者からするとしてますけどね。

部署依存な気がしますね…

うちもまだ特定の人だけです

なるほど、予算のある部署なら、という感じですか。

そうですね。あとは上司の方針とかです。

Discordボットのトークンって秘匿しなくても大丈夫？

軽く考えてたけどした方がいいですよね。中身だけ違うBotが入れてしまうから。

6:39 AM

新しいのを発行して今のを無効化でいいかな。

手元でボットアカウントを作って試してみたけど、マルチログイン出来るぽい。 (edited)

6:40 AM

普通のアカウントと同じ。

悪用方法としてはSpamですかね。

6:41 AM

挙動は大体確認してます。テストでサーバのBotをそのままにローカルでもう１つとかやることがあるので。

Swiftでボット簡単に書ける。 https://sword.azoy.me (edited)

そんなんあったのか。

Mac環境

可能なら乗っかりたいです！

きしかわさんの真似をしてSwiftコンパイラのDiscordボットをSwiftで書いてみた。 https://github.com/norio-nomura/SwiftCompilerDiscordappBot

norio-nomura/SwiftCompilerDiscordappBot

SwiftCompilerDiscordappBot - Swift Compiler Discordapp Bot

@norio_nomura botmgrを付与しました。

1

シンプル

ボットアカウントのユーザー名は一度作ると変えられないぽい。

ニックネームの変更が右クリックからできませんか？

出来るかも。

1:25 PM

あいや、このサーバーでは出来ない。

1:26 PM

@TestCLIBot print("hello, discord!")

Swift version 4.1 (swift-4.1-RELEASE) Target: x86_64-unknown-linux-gnu hello, discord!

とりあえず、swift package generate-xcodeprojすればXcodeでデバッグできるのがSwiftで書くメリットかな。

@swift403 @swift-4.1.3

protocol Widget { func print() func clone() -> Self } extension Widget { func print() { Swift.print("a widget of type \(Self.self)") } func clone() -> Self { return self } } class Box<Element> : Widget { init(value: Element) { self.contents = value } let contents: Element // Default implementation of print() is OK! // You must define this, or conformance checking fails on Swift 4.0.x: // func clone() -> Self { return self } } class Crate<T> : Box<T> { override init(value: T) { super.init(value: value) } } let c = Crate<Int>(value: 3) c.print() // prints: a widget of type Crate<Int>

error:

main.swift:8:10: error: method 'clone()' in non-final class 'Box<Element>' must return `Self` to conform to protocol 'Widget' func clone() -> Self { return self } ^

a widget of type Crate<Int>

@swiftbot

enum CustomString: ExpressibleByStringLiteral { typealias StringLiteralType = String init(stringLiteral value: StringLiteralType) { self = "hoge" } } let hoge: CustomString = "fuga" print(hoge)

Swiftバージョンごとにbotアカウントを分けてみた。

2

Swift version 4.1 (swift-4.1-RELEASE)

3:19 PM

/usercode/main.swift:8:26: warning: will never be executed let hoge: CustomString = "fuga" ^ /usercode/main.swift:8:26: note: a call to a never-returning function let hoge: CustomString = "fuga" ^ /usercode/main.swift:4:14: warning: will never be executed self = "hoge" ^ /usercode/main.swift:4:16: note: a call to a never-returning function self = "hoge" ^ /usercode/main.swift:3:5: warning: will never be executed init(stringLiteral value: StringLiteralType) { ^ /usercode/main.swift:3:5: note: a call to a never-returning function init(stringLiteral value: StringLiteralType) { ^ /usr/bin/swift[0x3f24d54] /usr/bin/swift[0x3f25096] /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7f8003430390] /usr/lib/swift/linux/libswiftCore.so(_T0S2SBp21_builtinStringLiteral_Bw17utf8CodeUnitCountBi1_7isASCIItcfC+0x4)[0x7f7fff39e424] [0x7f800385f0e4] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] [0x7f800385f0fa] ...

3:19 PM

stderr.txt

5.38 KB

^ これは何が起こってるんだろう？

self = "hoge"がinit(stringLiteral:)を再起呼び出ししてますね。

なるほど。無限再帰ですか。

2:21 AM

出力がなんなのか一見してよくわからなかった。 (edited)

ボットが出力をファイル添付へ切り替える閾値って、何をもとに決めてますか？ (edited)

2:27 AM

ああ、contentsの最大サイズか。

はい。2000文字以上はDiscordの仕様でエラーになります。ライブラリは自動分割の機能もあったのですが、ものすごい量が出ることがたまにあるのでそれはボツにしました。

Swift製DiscordライブラリがLinuxでファイル添付に対応してなかった…

@swift403 @swift-4.1.3

enum CustomString: ExpressibleByStringLiteral { typealias StringLiteralType = String init(stringLiteral value: StringLiteralType) { self = "hoge" } } let hoge: CustomString = "fuga" print(hoge)

error:

main.swift:8:26: warning: will never be executed let hoge: CustomString = "fuga" ^ main.swift:8:26: note: a call to a never-returning function let hoge: CustomString = "fuga" ^ main.swift:4:14: warning: will never be executed self = "hoge" ^ main.swift:4:16: note: a call to a never-returning function self = "hoge" ^ main.swift:3:5: warning: will never be executed init(stringLiteral value: StringLiteralType) { ^ main.swift:3:5: note: a call to a never-returning function init(stringLiteral value: StringLiteralType) { ^ 0 swift 0x0000000003ae91b8 1 swift 0x0000000003ae98f6 2 libpthread.so.0 0x00007f6a35029390 3 libpthread.so.0 0x00007f6a35458058 4 libpthread.so.0 0x00007f6a3545809a 5 libpthread.so.0 0x00007f6a3545809a 6 libpthread.so.0 0x00007f6a3545809a 7 libpthread.so.0 0x00007f6a3545809a 8 libpthread.so.0 0x00007f6a3545809a 9 libpthread.so.0 0x00007f6a3545809a 10 libpthread.so.0 0x00007f6a3545809a 11 libpthread.so.0 0x00007f6a3545809a 12 libpthread.so.0 0x00007f6a3545809a 13 libpthread.so.0 0x00007f6a3545809a 14 libpthread.so.0 0x00007f6a3545809a 15 libpthread.so.0 0x00007f6a3545809a 16 libpthread.so.0 0x00007f6a3545809a 17 libpthread.so.0 0x00007f6a3545809a 18 libpthread.so.0 0x00007f6a3545809a 19 libpthread.so.0 0x00007f6a3545809a 20 libpthread.so.0 0x00007f6a3545809a 21 libpthread.so.0 0x00007f6a3545809a 22 libpthread.so.0 0x00007f6a3545809a 23 libpthread.so.0 0x00007f6a3545809a 24 libpthread.so.0 0x00007f6a3545809a 25 libpthread.so.0 0x00007f6a3545809a 26 libpthread.so.0 0x00007f6a3545809a 27 libpthread.so.0 0x00007f6a3545809a 28 libpthread.so.0 0x00007f6a3545809a 29 libpthread.so.0 0x00007f6a3545809a 30 libpthread.so.0 0x00007f6a3545809a 31 libpthread.so.0 0x00007f6a3545809a 32 libpthread.so.0 0x00007f6a3545809a 33 libpthread.so.0 0x00007f6a3545809a 34 libpthread.so.0 0x0000

9:40 AM

stderr.txt

10.41 KB

error:

main.swift:8:26: warning: will never be executed let hoge: CustomString = "fuga" ^ main.swift:8:26: note: a call to a never-returning function let hoge: CustomString = "fuga" ^ main.swift:4:14: warning: will never be executed self = "hoge" ^ main.swift:4:16: note: a call to a never-returning function self = "hoge" ^ main.swift:3:5: warning: will never be executed init(stringLiteral value: StringLiteralType) { ^ main.swift:3:5: note: a call to a never-returning function init(stringLiteral value: StringLiteralType) { ^ /usr/bin/swift[0x3f24d54] /usr/bin/swift[0x3f25096] /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7f46186b8390] [0x7f4618ae70e2] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae70fa] [0x7f4618ae

9:40 AM

stderr.txt

5.07 KB

結果が大きい時のファイル添付に対応した。

すばらしい。私もエラーの有無を出そうかなあ。チャットのUI難しい。

きしかわさんのボットはCPU負荷に応じてお金がかかるタイプですか？

9:53 AM

僕はHerokuで動かしてて、CPU負荷に関係なく無料です。

9:53 AM

まだアカウントにクレジットカードを登録していないので、月に550時間までですが。

DigitalOceanなのでスペックと時間です。一番安いスペックなので動かし続けても一月500円程度です。

なるほど。

ボットは今のところ同時アクセスがほとんど無いので何使っても違いはなさそうですね。

10:10 AM

ただSSDは後30%だけど、古いスナップショットを消せばどうにでもなります。

@swift403 @swift-4.1.3

import Foundation func execute(_ args: [String], in directory: URL? = nil) -> (stdout: String, stderr: String) { let process = Process() process.launchPath = "/usr/bin/env" process.arguments = args if let directory = directory { process.currentDirectoryPath = directory.path } let stdoutPipe = Pipe(), stderrPipe = Pipe() process.standardOutput = stdoutPipe process.standardError = stderrPipe process.launch() process.waitUntilExit() let stdout = String(data: stdoutPipe.fileHandleForReading.readDataToEndOfFile(), encoding: .utf8) ?? "" let stderr = String(data: stderrPipe.fileHandleForReading.readDataToEndOfFile(), encoding: .utf8) ?? "" return (stdout, stderr) } execute(["df", "-m"])

error: main.swift:19:1: warning: result of call to 'execute(_:in:)' is unused execute(["df", "-m"]) ^ ~~~~~~~~~~~~~~

@swift403 @swift-4.1.3

import Foundation func execute(_ args: [String], in directory: URL? = nil) -> (stdout: String, stderr: String) { let process = Process() process.launchPath = "/usr/bin/env" process.arguments = args if let directory = directory { process.currentDirectoryPath = directory.path } let stdoutPipe = Pipe(), stderrPipe = Pipe() process.standardOutput = stdoutPipe process.standardError = stderrPipe process.launch() process.waitUntilExit() let stdout = String(data: stdoutPipe.fileHandleForReading.readDataToEndOfFile(), encoding: .utf8) ?? "" let stderr = String(data: stderrPipe.fileHandleForReading.readDataToEndOfFile(), encoding: .utf8) ?? "" return (stdout, stderr) } print(execute(["df", "-m"]).stdout)

Filesystem 1M-blocks Used Available Use% Mounted on none 384019 79671 284825 22% / /dev/mapper/evg0-evol0 384019 79671 284825 22% /tmp udev 30709 1 30709 1% /dev/herokudev none 64 0 64 0% /dev/shm tmpfs 6145 1 6144 1% /etc/resolv.conf

Filesystem 1M-blocks Used Available Use% Mounted on none 384019 80516 283980 23% / /dev/mapper/evg0-evol0 384019 80516 283980 23% /tmp udev 30709 1 30709 1% /dev/herokudev none 64 0 64 0% /dev/shm tmpfs 6145 1 6144 1% /etc/resolv.conf

@everyone

Uh oh, looks like swiftbot got compromised! Oh kishikawakatsumi, you dummy, putting servers at risk and everything, classic! Looks like our buddy here will have to shoot itself in the face. Oh well, everyone wave swiftbot a goodbye, you will be missed! (most likely not)

3

~~ぬうう、ヘルプメッセージをコードブロックにしようとしてるのだけど、バックチックがうまく入らない…~~ Zero-width spaceで解決した。 (edited)

@swift403 @swift-4.1.3

Usage: @swift403 [SWIFT_OPTIONS] ``` [Swift Code] ```

Usage: @swift41 [SWIFT_OPTIONS] ``` [Swift Code] ```

@swift403 @swift-4.1.3 --version

Swift version 4.1 (swift-4.1-RELEASE) Target: x86_64-unknown-linux-gnu

Swift version 4.0.3 (swift-4.0.3-RELEASE) Target: x86_64-unknown-linux-gnu

@swift403 @swift-4.1.3 -frontend -emit-sil func f(){}

sil_stage canonical import Builtin import Swift import SwiftShims func f() // main sil @main : $@convention(c) (Int32, UnsafeMutablePointer<Optional<UnsafeMutablePointer<Int8>>>) -> Int32 { bb0(%0 : $Int32, %1 : $UnsafeMutablePointer<Optional<UnsafeMutablePointer<Int8>>>): %2 = integer_literal $Builtin.Int32, 0 // user: %3 %3 = struct $Int32 (%2 : $Builtin.Int32) // user: %4 return %3 : $Int32 // id: %4 } // end sil function 'main' // f() sil hidden @_T04main1fyyF : $@convention(thin) () -> () { bb0: %0 = tuple () // user: %1 return %0 : $() // id: %1 } // end sil function '_T04main1fyyF'

sil_stage canonical import Builtin import Swift import SwiftShims func f() // main sil @main : $@convention(c) (Int32, UnsafeMutablePointer<Optional<UnsafeMutablePointer<Int8>>>) -> Int32 { bb0(%0 : $Int32, %1 : $UnsafeMutablePointer<Optional<UnsafeMutablePointer<Int8>>>): %2 = integer_literal $Builtin.Int32, 0 // user: %3 %3 = struct $Int32 (%2 : $Builtin.Int32) // user: %4 return %3 : $Int32 // id: %4 } // end sil function 'main' // f() sil hidden @_T04main1fyyF : $@convention(thin) () -> () { bb0: %0 = tuple () // user: %1 return %0 : $() // id: %1 } // end sil function '_T04main1fyyF'

外部へのネットワークアクセスを制限できない以外は、ほぼ形になったかな？＞ @swift403 @swift-4.1.3 (edited)

@swiftbot

Usage: @swiftbot [--version=SWIFT_VERSION] [--command={swift, swiftc}] [--options=SWIFTC_OPTIONS] ``` [Swift Code] ``` Examples: @swiftbot ``` print("Hello world!") ``` @swiftbot --version=4.0.3 ``` print("Hello world!") ``` @swiftbot --command=swiftc --options=-dump-parse ``` print("Hello world!") ``` Subcommands: @swiftbot versions: show available Swift toolchain versions @swiftbot contribute: show repository URLs @swiftbot help: show help

@swiftbot versions

9:33 AM

@swiftbot versions

Available Swift versions: 2018-04-13-a 4.1 4.0.3 3.1.1 3.0.2

メンションの行からオプションを取得する様になりました。 @swift403 @swift-4.1.3 -frontend -emit-sil func f() {}

sil_stage canonical import Builtin import Swift import SwiftShims func f() // main sil @main : $@convention(c) (Int32, UnsafeMutablePointer<Optional<UnsafeMutablePointer<Int8>>>) -> Int32 { bb0(%0 : $Int32, %1 : $UnsafeMutablePointer<Optional<UnsafeMutablePointer<Int8>>>): %2 = integer_literal $Builtin.Int32, 0 // user: %3 %3 = struct $Int32 (%2 : $Builtin.Int32) // user: %4 return %3 : $Int32 // id: %4 } // end sil function 'main' // f() sil hidden @_T04main1fyyF : $@convention(thin) () -> () { bb0: %0 = tuple () // user: %1 return %0 : $() // id: %1 } // end sil function '_T04main1fyyF'

sil_stage canonical import Builtin import Swift import SwiftShims func f() // main sil @main : $@convention(c) (Int32, UnsafeMutablePointer<Optional<UnsafeMutablePointer<Int8>>>) -> Int32 { bb0(%0 : $Int32, %1 : $UnsafeMutablePointer<Optional<UnsafeMutablePointer<Int8>>>): %2 = integer_literal $Builtin.Int32, 0 // user: %3 %3 = struct $Int32 (%2 : $Builtin.Int32) // user: %4 return %3 : $Int32 // id: %4 } // end sil function 'main' // f() sil hidden @_T04main1fyyF : $@convention(thin) () -> () { bb0: %0 = tuple () // user: %1 return %0 : $() // id: %1 } // end sil function '_T04main1fyyF'

@swift403 @swift-4.1.3 struct S: Hashable { var int: Int }

no outputs

exit status: 1, error output:

main.swift:1:8: error: type 'S' does not conform to protocol 'Hashable' struct S: Hashable { ^ main.swift:1:8: error: type 'S' does not conform to protocol 'Equatable' struct S: Hashable { ^ Swift.==:2:13: note: candidate has non-matching type '<Element where Element : Equatable> (ContiguousArray<Element>, ContiguousArray<Element>) -> Bool' public func ==<Element>(lhs: ContiguousArray<Element>, rhs: ContiguousArray<Element>) -> Bool where Element : Equatable ^ Swift.==:2:13: note: candidate has non-matching type '<Element where Element : Equatable> (ArraySlice<Element>, ArraySlice<Element>) -> Bool' public func ==<Element>(lhs: ArraySlice<Element>, rhs: ArraySlice<Element>) -> Bool where Element : Equatable ^ Swift.==:2:13: note: candidate has non-matching type '<Element where Element : Equatable> (Array<Element>, Array<Element>) -> Bool' public func ==<Element>(lhs: [Element], rhs: [Element]) -> Bool where Element : Equatable ^ Swift.==:3:13: note: candidate has non-matching type '(Any.Type?, Any.Type?) -> Bool' public func ==(t0: Any.Type?, t1: Any.Type?) -> Bool ^ Swift.==:6:13: note: candidate has non-matching type '<T where T : RawRepresentable, T.RawValue : Equatable> (T, T) -> Bool' public func ==<T>(lhs: T, rhs: T) -> Bool where T : RawRepresentable, T.RawValue : Equatable ^ Swift.==:45:13: note: candidate has non-matching type '<T where T : Equatable> (T?, T?) -> Bool' public func ==<T>(lhs: T?, rhs: T?) -> Bool where T : Equatable ^ Swift.==:22:13: note: candidate has non-matching type '<T> (T?, _OptionalNilComparisonType) -> Bool' public func ==<T>(lhs: T?, rhs: _OptionalNilComparisonType) -> Bool ^ Swift.==:22:13: note: candidate has non-matching type '<T> (_OptionalNilComparisonType, T?) -> Bool' public func ==<T>(lhs: _OptionalNilComparisonType, rhs: T?) -> Bool ^ Swift.==:9:13: note: candidate

10:19 AM

stderr.txt

15.59 KB

複数同時にバージョンを指定できるようになりました。

10:22 AM

@swiftbot --version=latest,4.1,4.0.3

func fibonacci(number: Int) -> Int { if number <= 1 { return number } else { return fibonacci(number: number - 1) + fibonacci(number: number - 2) } } print(fibonacci(number: 10))

Swift version 4.2-dev (LLVM 8a97de0e52, Clang 3c973cd6c1, Swift e0c091a012)

10:22 AM

55

10:22 AM

Swift version 4.1 (swift-4.1-RELEASE)

10:22 AM

55

10:22 AM

Swift version 4.0.3 (swift-4.0.3-RELEASE)

10:22 AM

55

のむらさんのバージョンごとにBotが分かれてるの、補完もきくしコードもシンプルになるしスマートですね。

10:24 AM

@swiftbot --version=latest --version=4.1 --version=4.0.3

func fibonacci(number: Int) -> Int { if number <= 1 { return number } else { return fibonacci(number: number - 1) + fibonacci(number: number - 2) } } print(fibonacci(number: 10))

Swift version 4.2-dev (LLVM 8a97de0e52, Clang 3c973cd6c1, Swift e0c091a012)

10:24 AM

55

10:24 AM

Swift version 4.1 (swift-4.1-RELEASE)

10:24 AM

55

10:24 AM

Swift version 4.0.3 (swift-4.0.3-RELEASE)

10:24 AM

55

DM内でもメンションが出来るみたいなので、チャンネルのタイプがGUILD_TEXTの場合（通常のチャンネル）だけ受け付ける様にしました。 https://discordapp.com/developers/docs/resources/channel#channel-object-channel-types

Discord API Docs for Bots and Developers

Integrate your service with Discord - whether it's a bot or a game or your whatever you wildest imagination can come up with.

バージョン毎にアカウントを分けたのは、なかなか良いアイデアだと自分でも思いました。

11:10 AM

ユーザー名はそれぞれswift403, swift41で作ってあり、ボット接続時にそれぞれニックネームをswift-4.0.3, swift-4.1に設定させています。

二つのボットのアイコンが同じだと分かりづらいかな @swift403 @swift-4.1.3 print("hello")

hello

Linuxでのbacktraceをもうちょっとマシなものにしようとしたけど、Herokuのコンテナ内では無理だった。

Swiftをシンボル付きでビルドするんですよね？

いえ、coreダンプを利用する方法と、backtraceのログテキストをpythonスクリプトで整形する2通りがあります。 https://github.com/gmilos/swift/blob/master/utils/symbolicate-linux-fatal

gmilos/swift

swift - The Swift Programming Language

3:24 PM

coreダンプを利用する方法 https://gist.github.com/norio-nomura/6654bea680baa61bb326d0ef4869615a

Symbolicate crash from core on Linux

3:25 PM

lldb swift -c core -o bt -bでバックトレースを作れる。

3:29 PM

symbolicate-linux-fatal の方は実際に成功していないけど、 symbolicate-linux-fatal app crash.log的な使い方をするぽい。

3:29 PM

どっちもlldbの実行に依存してる。

3:29 PM

Herokuのコンテナ内ではlldbを使えなかった。

@swift-4.1.3 -Xfrontend -debug-crash-after-parse print("hello")

error output:

/usr/bin/swift[0x3f24d54] /usr/bin/swift[0x3f25096] /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7f2d23306390] /usr/bin/swift[0x4c55c0] /usr/bin/swift[0x4c3a83] /usr/bin/swift[0x4beecc] /usr/bin/swift[0x4778c4] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0)[0x7f2d21a30830] /usr/bin/swift[0x475179] Stack dump: 0. Program arguments: /usr/bin/swift -frontend -interpret main.swift -disable-objc-interop -debug-crash-after-parse -module-name main

llvm-symbolizer が PATH に入っているともっとマシなトレースが出るはずです。

11:36 PM

#0 0x0000000003e318c4 PrintStackTraceSignalHandler(void*) (/home/rintaro/Documents/swift-oss/build/Ninja-ReleaseAssert/swift-linux-x86_64/bin/swift+0x3e318c4) #1 0x0000000003e31c06 SignalHandler(int) (/home/rintaro/Documents/swift-oss/build/Ninja-ReleaseAssert/swift-linux-x86_64/bin/swift+0x3e31c06) #2 0x00007fa3d67ae390 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x11390) #3 0x00000000004c1710 debugFailWithCrash() (/home/rintaro/Documents/swift-oss/build/Ninja-ReleaseAssert/swift-linux-x86_64/bin/swift+0x4c1710) #4 0x00000000004bfbd3 performCompile(swift::CompilerInstance&, swift::CompilerInvocation&, llvm::ArrayRef<char const*>, int&, swift::FrontendObserver*, swift::UnifiedStatsReporter*) (/home/rintaro/Documents/swift-oss/build/Ninja-ReleaseAssert/swift-linux-x86_64/bin/swift+0x4bfbd3) #5 0x00000000004bb013 swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) (/home/rintaro/Documents/swift-oss/build/Ninja-ReleaseAssert/swift-linux-x86_64/bin/swift+0x4bb013) #6 0x0000000000473a44 main (/home/rintaro/Documents/swift-oss/build/Ninja-ReleaseAssert/swift-linux-x86_64/bin/swift+0x473a44) #7 0x00007fa3d4ed8830 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x20830) #8 0x0000000000471319 _start (/home/rintaro/Documents/swift-oss/build/Ninja-ReleaseAssert/swift-linux-x86_64/bin/swift+0x471319) Stack dump: 0. Program arguments: /home/rintaro/Documents/swift-oss/build/Ninja-ReleaseAssert/swift-linux-x86_64/bin/swift -frontend -interpret test.swift -disable-objc-interop -debug-crash-after-parse -color-diagnostics -module-name test Illegal instruction (core dumped)

おお

11:43 PM

llvm-symbolizer は普通にapt-getで入れるやつで構わないのですか？

多分大丈夫だと思います。とはいえ、いずれにしても実行時クラッシュのトレースはシンボル化できないっぽいです。

/usr/bin/llvm-symbolizer-3.8として既に入ってた。

12:01 AM

末尾にバージョン名がついていないコマンドへのシンボリックリンクがあれば、勝手に使ってくれて便利になる様なコマンドは他にもあるのかな…

どうでしょう。これに関しては完全にハードコードされているので、他の事情はわからず。 https://github.com/apple/swift-llvm/blob/d14a2b25/lib/Support/Signals.cpp#L72

apple/swift-llvm

Contribute to swift-llvm development by creating an account on GitHub.

llvmをclangの依存パッケージとしてではなくapt-get install llvmとして明示的にインストールすれば、バージョンサフィックス無しのシンボリックリンクが作られるみたいですね。 (edited)

あれ？違うかも>apt-get install llvmとして明示的にインストールすれば (edited)

update-alternatives(8)を使った。 https://gist.github.com/norio-nomura/505e5a5dce1502c774db51c9e3663700

[one-liner] update-alternatives for llvm on ubuntu

@rintaro さんのアドバイスに従い llvm-symbolizer を使う様になりました。 @swift403 @swift-4.1.3 -Xfrontend -debug-crash-after-parse print("hello")

exit status: 4, error output:

#0 0x0000000003ae91b8 llvm::sys::PrintStackTrace(llvm::raw_ostream&) (/usr/bin/swift+0x3ae91b8) #1 0x0000000003ae98f6 SignalHandler(int) (/usr/bin/swift+0x3ae98f6) #2 0x00007f1fcf2b6390 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x11390) #3 0x00000000004b0540 debugFailWithCrash() (/usr/bin/swift+0x4b0540) #4 0x00000000004aea28 performCompile(swift::CompilerInstance&, swift::CompilerInvocation&, llvm::ArrayRef<char const*>, int&, swift::FrontendObserver*, swift::UnifiedStatsReporter*) (/usr/bin/swift+0x4aea28) #5 0x00000000004aa52b swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) (/usr/bin/swift+0x4aa52b) #6 0x0000000000465564 main (/usr/bin/swift+0x465564) #7 0x00007f1fcd9e0830 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x20830) #8 0x0000000000462e29 _start (/usr/bin/swift+0x462e29) Stack dump: 0. Program arguments: /usr/bin/swift -frontend -interpret main.swift -disable-objc-interop -debug-crash-after-parse -module-name main

exit status: 4, error output:

#0 0x0000000003f24d54 PrintStackTraceSignalHandler(void*) (/usr/bin/swift+0x3f24d54) #1 0x0000000003f25096 SignalHandler(int) (/usr/bin/swift+0x3f25096) #2 0x00007fcd052c1390 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x11390) #3 0x00000000004c55c0 debugFailWithCrash() (/usr/bin/swift+0x4c55c0) #4 0x00000000004c3a83 performCompile(swift::CompilerInstance&, swift::CompilerInvocation&, llvm::ArrayRef<char const*>, int&, swift::FrontendObserver*, swift::UnifiedStatsReporter*) (/usr/bin/swift+0x4c3a83) #5 0x00000000004beecc swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) (/usr/bin/swift+0x4beecc) #6 0x00000000004778c4 main (/usr/bin/swift+0x4778c4) #7 0x00007fcd039eb830 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x20830) #8 0x0000000000475179 _start (/usr/bin/swift+0x475179) Stack dump: 0. Program arguments: /usr/bin/swift -frontend -interpret main.swift -disable-objc-interop -debug-crash-after-parse -module-name main

前よりはマシになった。 @swift-4.1.3

enum CustomString: ExpressibleByStringLiteral { typealias StringLiteralType = String init(stringLiteral value: StringLiteralType) { self = "hoge" } } let hoge: CustomString = "fuga" print(hoge)

error output:

main.swift:8:26: warning: will never be executed let hoge: CustomString = "fuga" ^ main.swift:8:26: note: a call to a never-returning function let hoge: CustomString = "fuga" ^ main.swift:4:14: warning: will never be executed self = "hoge" ^ main.swift:4:16: note: a call to a never-returning function self = "hoge" ^ main.swift:3:5: warning: will never be executed init(stringLiteral value: StringLiteralType) { ^ main.swift:3:5: note: a call to a never-returning function init(stringLiteral value: StringLiteralType) { ^ #0 0x0000000003f24d54 PrintStackTraceSignalHandler(void*) (/usr/bin/swift+0x3f24d54) #1 0x0000000003f25096 SignalHandler(int) (/usr/bin/swift+0x3f25096) #2 0x00007f2fb4579390 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x11390) #3 0x00007f2fafce7424 _T0S2SBp21_builtinStringLiteral_Bw17utf8CodeUnitCountBi1_7isASCIItcfC (/usr/lib/swift/linux/libswiftCore.so+0x13c424) #4 0x00007f2fb49a80e4 #5 0x00007f2fb49a80fa #6 0x00007f2fb49a80fa #7 0x00007f2fb49a80fa #8 0x00007f2fb49a80fa #9 0x00007f2fb49a80fa #10 0x00007f2fb49a80fa #11 0x00007f2fb49a80fa #12 0x00007f2fb49a80fa #13 0x00007f2fb49a80fa #14 0x00007f2fb49a80fa #15 0x00007f2fb49a80fa #16 0x00007f2fb49a80fa #17 0x00007f2fb49a80fa #18 0x00007f2fb49a80fa #19 0x00007f2fb49a80fa #20 0x00007f2fb49a80fa #21 0x00007f2fb49a80fa #22 0x00007f2fb49a80fa #23 0x00007f2fb49a80fa #24 0x00007f2fb49a80fa #25 0x00007f2fb49a80fa #26 0x00007f2fb49a80fa #27 0x00007f2fb49a80fa #28 0x00007f2fb49a80fa #29 0x00007f2fb49a80fa #30 0x00007f2fb49a80fa #31 0x00007f2fb49a80fa #32 0x00007f2fb49a80fa #33 0x00007f2fb49a80fa #34 0x00007f2fb49a80fa #35 0x00007f2fb49a80fa #36 0x00007f2fb49a80fa #37 0x00007f2fb49a80fa #38 0x00007f2fb49a80fa #39 0x00007f2fb49a80fa #40 0x00007f2fb49a80fa #41 0x00007f2fb49a80fa #42 0x00007f2fb49a80fa #43 0x00007f2fb49a80fa #44 0x00007f2fb49a80fa #45

3:43 AM

stderr.txt

6.91 KB

@swiftbot --version=stable,latest print("Hello SwiftBot")

Swift version 4.1 (swift-4.1-RELEASE)

1:41 PM

Hello SwiftBot

1:41 PM

swift-DEVELOPMENT-SNAPSHOT-2018-04-16-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang c38020c511, Swift da10607e45)

1:41 PM

Hello SwiftBot

ちょっと分かりやすくなった。

@swift-4.0.3 @swift-4.1.3 @swift-4.2.4 --version

Swift version 4.1 (swift-4.1-RELEASE) Target: x86_64-unknown-linux-gnu

Swift version 4.2-dev (LLVM d14a2b25f2, Clang c38020c511, Swift da10607e45) Target: x86_64-unknown-linux-gnu

Swift version 4.0.3 (swift-4.0.3-RELEASE) Target: x86_64-unknown-linux-gnu

swift42を追加した。

https://bugs.swift.org/browse/SR-7450 より @swift-4.2.4

protocol DictionaryType { associatedtype Key associatedtype Value } protocol A: DictionaryType where Key == Value { static func foo() } extension A { static func foo() { print(type(of: self)) } } extension Dictionary: DictionaryType {} extension Dictionary: A where Key == Value { } extension Array where Element: A { static func foo() { Element.foo() } } [String: String].foo() // Dictionary<String, String> [[String: String]].foo() // Crash

Dictionary<String, String>.Type .Type

クラッシュしなくなったけどオカシナモノが表示されてませんかこれはw

3:14 AM

無を取得しているw

master はこんな感じですよ。

$ ../build/Ninja-ReleaseAssert/swift-macosx-x86_64/bin/swift test.swift Dictionary<String, String>.Type Dictionary<String, String>.Type

Masterは平和だ

4.2 がおかしな状態になっていたんだな。

3:19 AM

ああ、4.2 って master のスナップショットですね。

3:20 AM

https://github.com/apple/swift/pull/15960 なんで、まだ snapshot 出てないと思います。

AST: Exclude noncanonical params from `GenericSignature::enumerate...

Fixes a bug where having two generic params same-typed together would lead to crashes in IRGen, and maybe other places, that only expect to deal with canonical params.

@swift-4.2.4 import Foundation print(PorcessInfo.processInfo.enrionment["SWIFT_VERSION"])

exit status: 1, error output:

main.swift:2:7: error: use of unresolved identifier 'PorcessInfo'; did you mean 'ProcessInfo'? print(PorcessInfo.processInfo.enrionment["SWIFT_VERSION"]) ^~~~~~~~~~~ ProcessInfo Foundation.ProcessInfo:1:12: note: 'ProcessInfo' declared here open class ProcessInfo : Foundation.NSObject { ^

@swift-4.2.4 import Foundation print(ProcessInfo.processInfo.enrionment["SWIFT_VERSION"])

error output:

main.swift:2:19: error: value of type 'ProcessInfo' has no member 'enrionment'; did you mean 'environment'? print(ProcessInfo.processInfo.enrionment["SWIFT_VERSION"]) ~~~~~~~~~~~~^~~~~~~~~~~ ~~~~~~~~~~ environment Foundation.ProcessInfo:3:14: note: 'environment' declared here open var environment: [String : String] { get } ^

@swift-4.2.4 import Foundation print(ProcessInfo.processInfo.environment["SWIFT_VERSION"])

Optional("DEVELOPMENT-SNAPSHOT-2018-04-17-a")

3:21 AM

error output:

main.swift:2:7: warning: expression implicitly coerced from 'String?' to 'Any' print(ProcessInfo.processInfo.environment["SWIFT_VERSION"]) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.swift:2:42: note: provide a default value to avoid this warning print(ProcessInfo.processInfo.environment["SWIFT_VERSION"]) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~ ?? <#default value#> main.swift:2:42: note: force-unwrap the value to avoid this warning print(ProcessInfo.processInfo.environment["SWIFT_VERSION"]) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~ ! main.swift:2:42: note: explicitly cast to 'Any' with 'as Any' to silence this warning print(ProcessInfo.processInfo.environment["SWIFT_VERSION"]) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~ as Any

@swift-4.2.4 import Foundation print(ProcessInfo.processInfo.environment["SWIFT_VERSION"] ?? "")

DEVELOPMENT-SNAPSHOT-2018-04-17-a

ふう。

3:22 AM

ビルドエラーはDMで返す様にしたくなった…

1

スレッド機能が欲しくなりますね

DMでも使える様にしようかな…

@swiftbot --version=latest import Foundation print(ProcessInfo.processInfo.environment["SWIFT_VERSION"] ?? "") Swift Versionを返すのはこれでいいのか！

swift-DEVELOPMENT-SNAPSHOT-2018-04-16-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang c38020c511, Swift da10607e45)

3:22 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-16-a

僕の知るSwiftのDockerイメージは、全てSWIFT_VERSIONを設定してますね。

あ、Docker Imageで設定しているやつか。それでも今の私のやり方より良いですね。

普通はswift-プリフィックスが無いです。

なるほどー。

swiftenvの流儀かな？

ちなみにSWIFT_VERSIONからのバージョン情報はplayingへ設定する様にしてあります。

おもしろいw

ボットへのメッセージを編集すると、ボットもリプライを編集する様になりました。 @swift-4.1.3 (edited)

Usage: @swift41 [SWIFT_OPTIONS] ``` [Swift Code] ``` (edited)

すげー!

これでtypoも怖く無い @swift-4.0.3 print("hello") (edited)

hello (edited)

やばww

おおお！！！

@swift-4.2.4 print("あと、コマンド実行中に入力中インジケータを出す様にしました。")

あと、コマンド実行中に入力中インジケータを出す様にしました。

@norio_nomura こういう機能を実装する場合、状態を管理する必要がありますか？

あります。

1

メンションとそれに対する投稿を保存しておく、って感じですかね。

そそ。 https://github.com/norio-nomura/SwiftCompilerDiscordappBot/blob/master/Sources/SwiftCompilerDiscordappBot/App.swift#L49-L63

norio-nomura/SwiftCompilerDiscordappBot

SwiftCompilerDiscordappBot - Swift Compiler Discordapp Bot

8:15 AM

今はオンメモリなので、インスタンス再起動で忘れます。

お、これは嬉しい

なるほどオンメモリでやるなら思ってたよりもだいぶ楽チンですね。

最近あったらいいなと思ったのは、バージョン指定とかだけやり直したい

出力が大きい場合にファイルを添付しますが、添付ファイルの編集APIは提供されていないので、ちょっと微妙な感じになってます。

@swiftbot retry swift4.1 みたいな。

1

8:17 AM

そうするとさっき送られたソースを環境変えて再実行されると嬉しい・・・

Slackみたいにボタンとか出せないかな。

今は編集でメンションが追加された場合には無視していますが、対応は可能ですね。

8:19 AM

メンションが削除されたら返答も削除かな？

絵文字リアクションを自分で付けておいて・・・

8:20 AM

1. retry (edited)

1

リアクション反応Botのために

次善の策として、それは機能しそうと思ってました。 (edited)

4.1 4.2 4.0.3の絵文字を登録するとか

絵文字作る発想は無かったｗ

あ、リアクションは絵文字しかあかんのか。

とりあえず Heroku で簡単にデプロイできる様になったはずなので、欲しい機能は自分で追加してw https://github.com/norio-nomura/SwiftCompilerDiscordappBot

norio-nomura/SwiftCompilerDiscordappBot

SwiftCompilerDiscordappBot - Swift Compiler Discordapp Bot

1

2

ボタンの機能はDiscordにはないっぽいな。

デプロイボタン付ければ動くかどうかはまだ試してないな…

8:23 AM

今は一つのリポジトリに3つのブランチがあって、それらが3つのHerokuアカウントにDeployされてる感じ。

8:30 AM

ボットをビルドするSwiftコンパイラと、Discordでのリクエストをビルドするコンパイラが同じ、かつ同じコンテナ内で動くので、ネットワークアクセスとかも出来てしまいます。

8:31 AM

なんとか出来ないか調べましたが、諦めました。

まあ私のと違ってREST APIとかはないんですよね。何かするにはここに投稿する必要があるんですよね。 (edited)

そう。workerでDiscordのクライアントが動いてて、何もEXPOSEしていません。 (edited)

8:37 AM

HerokuのDockerコンテナはEXPOSEサポートしてなかった。 https://devcenter.heroku.com/articles/container-registry-and-runtime#unsupported-dockerfile-commands

Container Registry & Runtime (Docker Deploys) | Heroku Dev Center

Heroku Container Registry allows you to deploy your Docker-based app to Heroku. Both Common Runtime and Private Spaces are supported.

8:44 AM

何かクラッシュするバグを仕込んでしまったぽい…

8:45 AM

これ、テストとか頑張れば書けるのかな…

私もややこしくなってきたので、１メソッドで書き下していたのを分割して、意図しない影響を与えてないかを確認する正常系のテストを書こうと思ってます。それは難しくないはず。

8:48 AM

その次に書けたら意地悪な投稿でも問題が起きないようにある程度異常系のケースを書いて、って感じですね。

8:49 AM

それ以上は今のところ何かあったら再起動でいいので諦めていいんじゃないですか。

まあ、そうですね。

@swiftbot import Foundation print("Hello world!!") (edited)

2

Swift version 4.1 (swift-4.1-RELEASE) (edited)

4:11 PM

Hello world!! (edited)

4:11 PM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

4:11 PM

Hello world!

4:11 PM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

4:11 PM

Hello world!!

のむらさんのアイデアをいただいて、編集できるようにした。あと、masterのツールチェーンで再ビルドするボタン（

のリアクション）付けてみた。

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

11:21 PM

Hello world!

11:21 PM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

11:21 PM

Hello world!!

11:21 PM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

11:21 PM

Hello world!

11:21 PM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

11:21 PM

Hello world!!

リアクションの数が実行回数に反映されてる？

1

@swiftbot print("a!")

5

Swift version 4.1 (swift-4.1-RELEASE)

2:01 AM

a!

2:01 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:01 AM

a!

うおおｗ

2:01 AM

絵文字のセンスも良いｗ

ディスコの開発環境化が進んでる

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:02 AM

a!

2:02 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:02 AM

a!

すご

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:03 AM

a!

2:03 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:03 AM

a!

2:03 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:03 AM

a!

2:03 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:03 AM

a!

2:03 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:03 AM

a!

めっちゃでてくるｗ

なんか多いな？ｗ

バグがあるな。。。

あ　連打してしまった

2:03 AM

ごめんなさい

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:04 AM

a!

2:04 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:04 AM

a!

2:04 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:04 AM

a!

2:04 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:04 AM

a!

2:04 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:04 AM

a!

2:04 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:04 AM

a!

2:04 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:04 AM

a!

2:04 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

a!

a!

2:04 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:04 AM

a!

2:04 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:04 AM

a!

2:04 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:04 AM

a!

2:04 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

なんか不具合があるのとは別に、元々の投稿者の人だけが再ビルド反応するようにしていいかも。 (edited)

a!

2:04 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:04 AM

a!

2:04 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:04 AM

a!

2:04 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:04 AM

a!

2:04 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:04 AM

a!

2:04 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:04 AM

a!

2:04 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

多分その方がいいですね

a!

2:05 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:05 AM

a!

2:05 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:05 AM

a!

2:05 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:05 AM

a!

2:05 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:05 AM

a!

2:05 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:05 AM

a!

2:05 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:05 AM

a!

2:05 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:05 AM

a!

その処理だけ急いで入れるか。

(ていうかそうなると思ってめちゃ連打してしまった)

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:05 AM

a!

2:05 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:05 AM

a!

2:05 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

まだくるのか

a!

2:05 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:05 AM

a!

2:05 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:05 AM

a!

2:05 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:05 AM

a!

2:05 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:05 AM

a!

2:05 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

さすがにこんなに押してないぞｗ

a!

2:05 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:05 AM

a!

2:05 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:05 AM

a!

大丈夫かこれｗ

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:05 AM

a!

2:05 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:05 AM

a!

2:05 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

なんかとまんなくなってそう

ｗｗ

a!

2:05 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:05 AM

a!

2:05 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:05 AM

a!

2:05 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:05 AM

a!

2:05 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:05 AM

a!

2:06 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:06 AM

a!

2:06 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:06 AM

a!

2:06 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:06 AM

a!

2:06 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:06 AM

a!

2:06 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:06 AM

a!

2:06 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

botが自殺しそうなコード投げたらクラッシュして止まりそう

2:06 AM

とまらないかな

a!

2:06 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:06 AM

a!

2:06 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:06 AM

a!

2:06 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:06 AM

a!

2:06 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:06 AM

a!

2:06 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:06 AM

a!

2:06 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:06 AM

a!

2:06 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:06 AM

a!

止めてみます。

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:06 AM

a!

通知がｗ

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:06 AM

a!

2:06 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

@swiftbot Int?.none!

a!

2:06 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:06 AM

a!

2:06 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

2:06 AM

a!

とまった

再起動したから前の情報は忘れるはず。

いちにのぽかん

（夜中に発動したら大変なことになるなｗ）

たぶん、他の人が押してもビルドしなくなったと思います。

2:16 AM

回数の問題は推測だけど再ビルドはパラメータをちょっと変えて再帰的に呼び出すみたいな処理になってるので、リアクションを受けた時のコールバックのクロージャがどんどん増えてるんじゃないかと。これはちょっと設計を見直しているのでそこで直せるはず。

@swift-4.2.4 enum Hoge: CaseIterable { case hoge, fuga, piyo } Hoge.allCases.map { print($0) } (edited)

あ、編集してメンション付け加えるのにはまだ対応してません。

7:55 AM

対応するか。

了解

7:56 AM

@swift-4.2.4 enum Hoge: CaseIterable { case hoge, fuga, piyo } Hoge.allCases.forEach { print($0) } (edited)

hoge fuga piyo (edited)

ほほう

編集でのメンションの追加／削除、メッセージ削除をサポートしました。 @swift-4.2.4 import Foundation print(ProcessInfo.processInfo.environment["SWIFT_VERSION"] ?? "") (edited)

DEVELOPMENT-SNAPSHOT-2018-04-19-a (edited)

DEVELOPMENT-SNAPSHOT-2018-04-20-a

標準出力・標準エラーのサイズが大きい時、メッセージへファイル添付するのをやめて、代わりに https://www.file.io へアップロードする様に変更しました。 Discordのファイル添付はAPIから中身を変更できないため、コード編集により出力が変わっても今までは反映することが出来ませんでした。この変更により、更新された出力へのリンクを一緒に返すことができる様になりました。 @swift-4.2.4 import Foundation print(ProcessInfo.processInfo.environment["SWIFT_VERSION"] ?? "") (edited)

DEVELOPMENT-SNAPSHOT-2018-04-21-a (edited)

DEVELOPMENT-SNAPSHOT-2018-04-22-a

RxSwiftをインポートできる様にしました。 @swift-4.0.3 @swift-4.1.3 @swift-4.2.4

import Foundation let versionOfRxSwift = ProcessInfo.processInfo.environment["RXSWIFT_VERSION"] ?? "" print("RxSwift version: \(versionOfRxSwift)") import RxSwift _ = Observable<String>.create { observerOfString in print("Observable created") observerOfString.on(.next("😉")) observerOfString.on(.completed) return Disposables.create() } .subscribe { event in print(event) }

2

RxSwift version: 4.1.2 Observable created next(😉) completed

素晴らしい。

libRxSwift.soを作るのにPackage.swift内でlibrary typeをdynamicにしなくても、 swift build --target RxSwift -Xswiftc -emit-library -Xswiftc -o -Xswiftc `swift build --show-bin-path`/libRxSwift.so とすれば作れることを知りました。

これって例の最適化バグ回避してます?

3:41 PM

試してみよう

RxSwift自体はdebugビルドされてます。

おー

3:44 PM

じゃあ心配ないすね

@swiftbot let a: UInt32 = 0x80_00_00_00 let b: UInt32 = 0x80_00_00_00 let c = a.addingReportingOverflow(b) dump(c) (edited)

1

Swift version 4.1 (swift-4.1-RELEASE) (edited)

11:32 AM

▿ (2 elements) - partialValue: 0 - overflow: true

@swiftbot let a: UInt32 = 0x80_00_00_00 let b: UInt32 = 0x7F_FF_FF_FF let c = a.addingReportingOverflow(b) dump(c)

1

Swift version 4.1 (swift-4.1-RELEASE)

11:32 AM

▿ (2 elements) - partialValue: 4294967295 - overflow: false

@swift-tensorflow import TensorFlow

no output

import Pythonは通るけど、動かない？ @swift-tensorflow

import TensorFlow import Python // NumPy example: let np = Python.import("numpy") // import numpy as np let a = np.arange(15).reshape(3, 5) // a = np.arange(15).reshape(3, 5) let b = np.array([6, 7, 8]) // b = np.array([6, 7, 8])

exit status: 1 with stderr:

main.swift:5:18: error: cannot call value of non-function type 'PyValue' let a = np.arange(15).reshape(3, 5) // a = np.arange(15).reshape(3, 5) ~~~~~~~~~^ main.swift:6:17: error: cannot call value of non-function type 'PyValue' let b = np.array([6, 7, 8]) // b = np.array([6, 7, 8]) ~~~~~~~~^

numpyがインストールされてないのでは？

2:13 AM

python環境の方に。

入れる様にしたのですが https://hub.docker.com/r/norionomura/swift-tensorflow/builds/bllramlxypm8jhrbhhspiby/

ああ、なるほど、インストール済みのイメージなんですね。

サンプルコードで動作確認してて、足りてなかったものは入れる様にしました。 (edited)

2:15 AM

https://github.com/norio-nomura/docker-swift-tensorflow/commit/ce41f682e71cb2c93bbd580adda15ea505d00aa4

Add missing packages · norio-nomura/docker-swift-tensorflow@ce41f68

np.arange.call(with: 15) じゃないと動かないみたいですね

なるほど。

@swiftbot import Foundation @objc protocol Hoge { func foobarbaz() } var x: AnyObject = "hoge" as NSString x.foobarbaz() (edited)

2

Swift version 4.1 (swift-4.1-RELEASE) (edited)

8:34 AM

<unknown>:0: error: fatal error encountered during compilation; please file a bug report with your project and the crash log <unknown>:0: note: Program used external function 'sel_registerName' which could not be resolved! /usr/bin/swift[0x3f24d54] /usr/bin/swift[0x3f25096] /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7f12ac409390] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0x38)[0x7f12aab48428] /lib/x86_64-linux-gnu/libc.so.6(abort+0x16a)[0x7f12aab4a02a] /usr/bin/swift[0x4c3f75] /usr/bin/swift[0x3eb851f] /usr/bin/swift[0xffeddb] /usr/bin/swift[0xffd626] /usr/bin/swift[0xfead79] /usr/bin/swift[0x4d8e48] /usr/bin/swift[0x4c35d3] /usr/bin/swift[0x4beecc] /usr/bin/swift[0x4778c4] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0)[0x7f12aab33830] /usr/bin/swift[0x475179] Stack dump: 0. Program arguments: /usr/bin/swift -frontend -interpret /usercode/main.swift -disable-objc-interop -I /usr/lib/swift/clang/include/ -I /vendor/SwiftyMath/.build/release/ -I /vendor/swift-package-libbsd/ -module-name main -ldSwiftyMath Aborted (core dumped)

(edited)

8:35 AM

swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)

8:35 AM

/usercode/main.swift:7:22: error: 'Int' is not convertible to 'AnyObject'; did you mean to use 'as!' to force downcast? var x: AnyObject = 1 as AnyObject ~~^~~~~~~~~~~~ as!

AnyObject の何でもメソッド呼べちゃう性を Linux で試して見たかっただけなのですが、どこで落ちているのか分からないですねｗ

のむらさんの方でやったらどうですかね？私のやつもバックトレースの改善とかいろいろやろうと思うのですが、最近時間取れてなくて。

1

@swift-4.1.3 import Foundation @objc protocol Hoge { func foobarbaz() } var x: AnyObject = "hoge" as NSString x.foobarbaz() (edited)

stderr:

<unknown>:0: error: fatal error encountered during compilation; please file a bug report with your project and the crash log <unknown>:0: note: Program used external function 'sel_registerName' which could not be resolved! #0 0x0000000003f24d54 PrintStackTraceSignalHandler(void*) (/usr/bin/swift+0x3f24d54) #1 0x0000000003f25096 SignalHandler(int) (/usr/bin/swift+0x3f25096) #2 0x00007f3b0201f390 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x11390) #3 0x00007f3b0075e428 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x35428) #4 0x00007f3b0076002a abort (/lib/x86_64-linux-gnu/libc.so.6+0x3702a) #5 0x00000000004c3f75 (/usr/bin/swift+0x4c3f75) #6 0x0000000003eb851f llvm::report_fatal_error(llvm::Twine const&, bool) (/usr/bin/swift+0x3eb851f) #7 0x0000000000ffeddb llvm::RuntimeDyldImpl::resolveExternalSymbols() (/usr/bin/swift+0xffeddb) #8 0x0000000000ffd626 llvm::RuntimeDyldImpl::resolveRelocations() (/usr/bin/swift+0xffd626) #9 0x0000000000fead79 llvm::MCJIT::finalizeObject() (/usr/bin/swift+0xfead79) #10 0x00000000004d8e48 swift::RunImmediately(swift::CompilerInstance&, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&, swift::IRGenOptions&, swift::SILOptions const&) (/usr/bin/swift+0x4d8e48) #11 0x00000000004c35d3 performCompile(swift::CompilerInstance&, swift::CompilerInvocation&, llvm::ArrayRef<char const*>, int&, swift::FrontendObserver*, swift::UnifiedStatsReporter*) (/usr/bin/swift+0x4c35d3) #12 0x00000000004beecc swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) (/usr/bin/swift+0x4beecc) #13 0x00000000004778c4 main (/usr/bin/swift+0x4778c4) #14 0x00007f3b00749830 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x20830) #15 0x0000000000475179 _start (/usr/bin/swift+0x475179) Stack dump: 0. Program arguments: /usr/bin/swift -frontend -interpret main.sw

(edited)

stderr.txt

https://file.io/Q9FH2i

demangle復活 @swift-4.1.3 demangle T0s19preconditionFailures5NeverOSSyXK_s12StaticStringV4fileSu4linetFfA

_T0s19preconditionFailures5NeverOSSyXK_s12StaticStringV4fileSu4linetFfA_ ---> default argument 0 of Swift.preconditionFailure(@autoclosure () -> Swift.String, file: Swift.StaticString, line: Swift.UInt) -> Swift.Never

@swift-4.1.3 demangle -simplified T0s19preconditionFailures5NeverOSSyXK_s12StaticStringV4fileSu4linetFfA (edited)

_T0s19preconditionFailures5NeverOSSyXK_s12StaticStringV4fileSu4linetFfA_ ---> default argument 0 of preconditionFailure(_:file:line:)

(edited)

botで残る課題は、機能としてはリプライ情報の永続化くらいかな。

12:59 PM

運用はスナップショットの自動更新。

1:02 PM

あ、botへDMも解放したいな。

1

botへのDMを解放しました。 DMでは、メンションが含まれていなくても返事を返しますが、コンパイラオプションを渡す場合にはメンションに続けて記述してください。 [@swift41 [SWIFT_OPTIONS]] ``` [Swift Code] ```

@swift-4.2.4 import Foundation print(ProcessInfo.processInfo.environment["SWIFT_VERSION"] ?? "") (edited)

4.2-DEVELOPMENT-SNAPSHOT-2018-04-23-a

swift に main.swift としてコードを渡して実行させる方式だと、シグナルハンドラを設定しても呼ばれないな。

コンパイルして実行だと多少元のコードに手を加えないといけないのがちょっと面倒なんですよね。

そしてボットのクラッシュログは出なかった…

4.2-DEVELOPMENT-SNAPSHOT-2018-05-02-a

@swift-4.0.3

import Foundation func decimalNumberWithDouble(double: Double) -> NSDecimalNumber { let number = double as NSNumber return NSDecimalNumber(string: number.stringValue) } var i = decimalNumberWithDouble(double: 0.0) let limit = decimalNumberWithDouble(double: 1.1) let target = decimalNumberWithDouble(double: 1.0) while i.compare(limit) == ComparisonResult.orderedAscending { let add = decimalNumberWithDouble(double: 0.01) i = i.adding(add) print(i, i == target) if i == target { print("####called this line####") } } print("fin")

exit status: 1 with stderr:

main.swift:5:18: error: cannot convert value of type 'Double' to type 'NSNumber' in coercion let number = double as NSNumber ^~~~~~

@swift-4.1.3 -Onone

import Foundation protocol P { func hoge() } class Q {} extension Q: P { @objc func hoge() { print("q: hoge") } } class R: Q { override func hoge() { super.hoge() print("r: hoge") } } let q = Q() let r = R() q.hoge() r.hoge()

exit status: 134 with stderr:

swift: /home/buildnode/jenkins/workspace/oss-swift-4.1-package-linux-ubuntu-16_04/swift/lib/IRGen/GenClass.cpp:2211: llvm::Constant *swift::irgen::emitCategoryData(swift::irgen::IRGenModule &, swift::ExtensionDecl *): Assertion `IGM.ObjCInterop && "emitting RO-data outside of interop mode"' failed. #0 0x0000000003f24d54 PrintStackTraceSignalHandler(void*) (/usr/bin/swift+0x3f24d54) #1 0x0000000003f25096 SignalHandler(int) (/usr/bin/swift+0x3f25096) #2 0x00007f19216ff390 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x11390) #3 0x00007f191fe3e428 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x35428) #4 0x00007f191fe4002a abort (/lib/x86_64-linux-gnu/libc.so.6+0x3702a) #5 0x00007f191fe36bd7 (/lib/x86_64-linux-gnu/libc.so.6+0x2dbd7) #6 0x00007f191fe36c82 (/lib/x86_64-linux-gnu/libc.so.6+0x2dc82) #7 0x000000000066766e swift::irgen::emitCategoryData(swift::irgen::IRGenModule&, swift::ExtensionDecl*) (/usr/bin/swift+0x66766e) #8 0x00000000004e8dc1 swift::irgen::IRGenModule::emitExtension(swift::ExtensionDecl*) (/usr/bin/swift+0x4e8dc1) #9 0x00000000004e0555 swift::irgen::IRGenModule::emitSourceFile(swift::SourceFile&, unsigned int) (/usr/bin/swift+0x4e0555) #10 0x00000000005ad7d6 performIRGeneration(swift::IRGenOptions&, swift::ModuleDecl*, std::unique_ptr<swift::SILModule, std::default_delete<swift::SILModule> >, llvm::StringRef, llvm::LLVMContext&, swift::SourceFile*, llvm::GlobalVariable**, unsigned int) (/usr/bin/swift+0x5ad7d6) #11 0x00000000005abf9d swift::performIRGeneration(swift::IRGenOptions&, swift::ModuleDecl*, std::unique_ptr<swift::SILModule, std::default_delete<swift::SILModule> >, llvm::StringRef, llvm::LLVMContext&, llvm::GlobalVariable**) (/usr/bin/swift+0x5abf9d) #12 0x00000000004d878b swift::RunImmediately(swift::CompilerInstance&, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>

stderr.txt

https://file.io/eIKrPu

あ、そっかそりゃ無理だ

@swiftbot !docker build --no-cache=true --rm=true --tag=kishikawakatsumi/swift:2018-05-02-a . --build-arg SWIFT_BRANCH=swift-4.2-branch --build-arg SWIFT_VERSION=swift-4.2-DEVELOPMENT-SNAPSHOT-2018-05-02-a

12:37 AM

@swiftbot !docker build --no-cache=true --rm=true --tag=kishikawakatsumi/swift:2018-05-02-a . --build-arg SWIFT_BRANCH=swift-4.2-branch --build-arg SWIFT_VERSION=swift-4.2-DEVELOPMENT-SNAPSHOT-2018-05-02-a

12:43 AM

@swiftbot versions

2018-04-25-a 2018-05-02-a 3.0.1 3.0.2 3.1 3.1.1 4.0 4.0.2 4.0.3 4.1

4.1.1-RELEASE

@swiftbot !docker build --no-cache=true --rm=true --tag=kishikawakatsumi/swift:4.1.1 . --build-arg SWIFT_BRANCH=swift-4.1.1-release --build-arg SWIFT_VERSION=swift-4.1.1-RELEASE

```undefined Sending build context to Docker daemon 88.85MB Step 1/10 : FROM ubuntu:16.04 ---> f975c5035748 Step 2/10 : LABEL maintainer="Katsumi Kishikawa <kishikawakatsumi@mac.com>" ---> Running in 3fd6e4adc20e Removing intermediate container 3fd6e4adc20e ---> 851cf3e30ed9 Step 3/10 : LABEL Description="Docker Container for the Apple's Swift programming language" ---> Running in 40c790c23ab1 Removing intermediate container 40c790c23ab1 ---> 5051d0941e8f Step 4/10 : RUN apt-get -q update && apt-get -q install -y make libc6-dev clang-3.8 curl libedit-dev libpython2.7 libicu-dev libssl-dev libxml2 tzdata git libcurl4-openssl-dev pkg-config && update-alternatives --quiet --install /usr/bin/clang clang /usr/bin/clang-3.8 100 && update-alternatives --quiet --install /usr/bin/clang++ clang++ /usr/bin/clang++-3.8 100 && rm -r /var/lib/apt/lists/* ---> Running in 9413e8e47de6 Get:1 http://security.ubuntu.com/ubuntu xenial-security InRelease [107 kB] Get:2 http://archive.ubuntu.com/ubuntu xenial InRelease [247 kB] Get:3 http://security.ubuntu.com/ubuntu xenial-security/universe Sources [80.4 kB] Get:4 http://archive.ubuntu.com/ubuntu xenial-updates InRelease [109 kB] Get:5 http://security.ubuntu.com/ubuntu xenial-security/main amd64 Packages [612 kB] Get:6 http://archive.ubuntu.com/ubuntu xenial-backports InRelease [107 kB] Get:7 http://archive.ubuntu.com/ubuntu xenial/universe Sources [9802 kB] Get:8 http://security.ubuntu.com/ubuntu xenial-security/restricted amd64 Packages [12.7 kB] Get:9 http://security.ubuntu.com/ubuntu xenial-security/universe amd64 Packages [436 kB] Get:10 http://security.ubuntu.com/ubuntu xenial-security/multiverse amd64 Packages [3755 B] Get:11 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages [1558 kB] Get:12 http://archive.ubuntu.com/ubuntu xenial/restricted amd64 Packages [14.1 kB]

4:28 AM

Get:13 http://archive.ubuntu.com/ubuntu xenial/universe amd64 Packages [9827 kB] Get:14 http://archive.ubuntu.com/ubuntu xenial/multiverse amd64 Packages [176 kB] Get:15 http://archive.ubuntu.com/ubuntu xenial-updates/universe Sources [255 kB] Get:16 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages [991 kB] Get:17 http://archive.ubuntu.com/ubuntu xenial-updates/restricted amd64 Packages [13.1 kB] Get:18 http://archive.ubuntu.com/ubuntu xenial-updates/universe amd64 Packages [804 kB] Get:19 http://archive.ubuntu.com/ubuntu xenial-updates/multiverse amd64 Packages [18.8 kB] Get:20 http://archive.ubuntu.com/ubuntu xenial-backports/main amd64 Packages [5157 B] Get:21 http://archive.ubuntu.com/ubuntu xenial-backports/universe amd64 Packages [8075 B] Fetched 25.2 MB in 5s (4932 kB/s) Reading package lists... Reading package lists... Building dependency tree... Reading state information... The following additional packages will be installed: binfmt-support binutils build-essential bzip2 ca-certificates cpp cpp-5 dpkg-dev fakeroot file g++ g++-5 gcc gcc-5 git-man icu-devtools ifupdown iproute2 isc-dhcp-client isc-dhcp-common krb5-locales less libalgorithm-diff-perl libalgorithm-diff-xs-perl libalgorithm-merge-perl libasan2 libasn1-8-heimdal libatm1 libatomic1 libbsd-dev libbsd0 libc-dev-bin libcc1-0 libcilkrts5 libclang-common-3.8-dev libclang1-3.8 libcurl3 libcurl3-gnutls libdns-export162 libdpkg-perl libedit2 liberror-perl libexpat1 libfakeroot libffi-dev libffi6 libfile-fcntllock-perl libgcc-5-dev libgdbm3 libglib2.0-0 libglib2.0-data libgmp10 libgnutls30 libgomp1 libgssapi-krb5-2 libgssapi3-heimdal libhcrypto4-heimdal libheimbase1-heimdal libheimntlm0-heimdal libhogweed4 libhx509-5-heimdal libicu55 libidn11 libisc-export160 libisl15 libitm1 libjsoncpp1 libk5crypto3 libkeyutils1 libkrb5-26-heimdal libkrb5-3

4:28 AM

libkrb5support0 libldap-2.4-2 libllvm3.8 liblsan0 libmagic1 libmnl0 libmpc3 libmpfr4 libmpx0 libnettle6 libobjc-5-dev libobjc4 libp11-kit0 libperl5.22 libpipeline1 libpopt0 libpython-stdlib libpython2.7-minimal libpython2.7-stdlib libquadmath0 libroken18-heimdal librtmp1 libsasl2-2 libsasl2-modules libsasl2-modules-db libsqlite3-0 libssl-doc libssl1.0.0 libstdc++-5-dev libtasn1-6 libtinfo-dev libtsan0 libubsan0 libwind0-heimdal libx11-6 libx11-data libxau6 libxcb1 libxdmcp6 libxext6 libxmuu1 libxtables11 linux-libc-dev llvm-3.8 llvm-3.8-dev llvm-3.8-runtime manpages manpages-dev mime-support netbase openssh-client openssl patch perl perl-base perl-modules-5.22 python python-minimal python2.7 python2.7-minimal rename rsync sgml-base shared-mime-info xauth xdg-user-dirs xml-core xz-utils zlib1g-dev Suggested packages: binutils-doc bzip2-doc gnustep gnustep-devel clang-3.8-doc cpp-doc gcc-5-locales debian-keyring g++-multilib g++-5-multilib gcc-5-doc libstdc++6-5-dbg gcc-multilib autoconf automake libtool flex bison gdb gcc-doc gcc-5-multilib libgcc1-dbg libgomp1-dbg libitm1-dbg libatomic1-dbg libasan2-dbg liblsan0-dbg libtsan0-dbg libubsan0-dbg libcilkrts5-dbg libmpx0-dbg libquadmath0-dbg gettext-base git-daemon-run | git-daemon-sysvinit git-doc git-el git-email git-gui gitk gitweb git-arch git-cvs git-mediawiki git-svn ppp rdnssd iproute2-doc resolvconf avahi-autoipd isc-dhcp-client-ddns apparmor glibc-doc libcurl4-doc libcurl3-dbg libidn11-dev libkrb5-dev libldap2-dev librtmp-dev gnutls-bin krb5-doc krb5-user icu-doc libsasl2-modules-otp libsasl2-modules-ldap libsasl2-modules-sql libsasl2-modules-gssapi-mit | libsasl2-modules-gssapi-heimdal libstdc++-5-doc llvm-3.8-doc make-doc man-browser ssh-askpass libpam-ssh keychain monkeysphere ed diffutils-doc perl-doc libterm-readline-gnu-perl | libterm-readline-perl-perl python-doc

4:28 AM

python-tk python2.7-doc openssh-server sgml-base-doc debhelper The following NEW packages will be installed: binfmt-support binutils build-essential bzip2 ca-certificates clang-3.8 cpp cpp-5 curl dpkg-dev fakeroot file g++ g++-5 gcc gcc-5 git git-man icu-devtools ifupdown iproute2 isc-dhcp-client isc-dhcp-common krb5-locales less libalgorithm-diff-perl libalgorithm-diff-xs-perl libalgorithm-merge-perl libasan2 libasn1-8-heimdal libatm1 libatomic1 libbsd-dev libbsd0 libc-dev-bin libc6-dev libcc1-0 libcilkrts5 libclang-common-3.8-dev libclang1-3.8 libcurl3 libcurl3-gnutls libcurl4-openssl-dev libdns-export162 libdpkg-perl libedit-dev libedit2 liberror-perl libexpat1 libfakeroot libffi-dev libffi6 libfile-fcntllock-perl libgcc-5-dev libgdbm3 libglib2.0-0 libglib2.0-data libgmp10 libgnutls30 libgomp1 libgssapi-krb5-2 libgssapi3-heimdal libhcrypto4-heimdal libheimbase1-heimdal libheimntlm0-heimdal libhogweed4 libhx509-5-heimdal libicu-dev libicu55 libidn11 libisc-export160 libisl15 libitm1 libjsoncpp1 libk5crypto3 libkeyutils1 libkrb5-26-heimdal libkrb5-3 libkrb5support0 libldap-2.4-2 libllvm3.8 liblsan0 libmagic1 libmnl0 libmpc3 libmpfr4 libmpx0 libnettle6 libobjc-5-dev libobjc4 libp11-kit0 libperl5.22 libpipeline1 libpopt0 libpython-stdlib libpython2.7 libpython2.7-minimal libpython2.7-stdlib libquadmath0 libroken18-heimdal librtmp1 libsasl2-2 libsasl2-modules libsasl2-modules-db libsqlite3-0 libssl-dev libssl-doc libssl1.0.0 libstdc++-5-dev libtasn1-6 libtinfo-dev libtsan0 libubsan0 libwind0-heimdal libx11-6 libx11-data libxau6 libxcb1 libxdmcp6 libxext6 libxml2 libxmuu1 libxtables11 linux-libc-dev llvm-3.8 llvm-3.8-dev llvm-3.8-runtime make manpages manpages-dev mime-support netbase openssh-client openssl patch perl perl-modules-5.22 pkg-config python python-minimal python2.7 python2.7-minimal rename rsync sgml-base

4:28 AM

shared-mime-info tzdata xauth xdg-user-dirs xml-core xz-utils zlib1g-dev The following packages will be upgraded: perl-base 1 upgraded, 152 newly installed, 0 to remove and 13 not upgraded. Need to get 144 MB of archives. After this operation, 654 MB of additional disk space will be used. Get:1 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 perl-base amd64 5.22.1-9ubuntu0.3 [1286 kB] Get:2 http://archive.ubuntu.com/ubuntu xenial/main amd64 libatm1 amd64 1:2.5.1-1.5 [24.2 kB] Get:3 http://archive.ubuntu.com/ubuntu xenial/main amd64 libmnl0 amd64 1.0.3-5 [12.0 kB] Get:4 http://archive.ubuntu.com/ubuntu xenial/main amd64 libpopt0 amd64 1.16-10 [26.0 kB] Get:5 http://archive.ubuntu.com/ubuntu xenial/main amd64 libgdbm3 amd64 1.8.3-13.1 [16.9 kB] Get:6 http://archive.ubuntu.com/ubuntu xenial/main amd64 libxau6 amd64 1:1.0.8-1 [8376 B] Get:7 http://archive.ubuntu.com/ubuntu xenial/main amd64 libxdmcp6 amd64 1:1.1.2-1.1 [11.0 kB] Get:8 http://archive.ubuntu.com/ubuntu xenial/main amd64 libxcb1 amd64 1.11.1-1ubuntu1 [40.0 kB] Get:9 http://archive.ubuntu.com/ubuntu xenial/main amd64 libx11-data all 2:1.6.3-1ubuntu2 [113 kB] Get:10 http://archive.ubuntu.com/ubuntu xenial/main amd64 libx11-6 amd64 2:1.6.3-1ubuntu2 [571 kB] Get:11 http://archive.ubuntu.com/ubuntu xenial/main amd64 libxext6 amd64 2:1.3.3-1 [29.4 kB] Get:12 http://archive.ubuntu.com/ubuntu xenial/main amd64 sgml-base all 1.26+nmu4ubuntu1 [12.5 kB] Get:13 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 perl-modules-5.22 all 5.22.1-9ubuntu0.3 [2646 kB] Get:14 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libperl5.22 amd64 5.22.1-9ubuntu0.3 [3402 kB] Get:15 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 perl amd64 5.22.1-9ubuntu0.3 [237 kB] Get:16 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libpython2.7-minimal amd64 2.7.12-1ubuntu0~16.04.3 [340 kB]

4:28 AM

Get:17 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 python2.7-minimal amd64 2.7.12-1ubuntu0~16.04.3 [1261 kB] Get:18 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 python-minimal amd64 2.7.12-1~16.04 [28.1 kB] Get:19 http://archive.ubuntu.com/ubuntu xenial/main amd64 mime-support all 3.59ubuntu1 [31.0 kB] Get:20 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libexpat1 amd64 2.1.0-7ubuntu0.16.04.3 [71.2 kB] Get:21 http://archive.ubuntu.com/ubuntu xenial/main amd64 libffi6 amd64 3.2.1-4 [17.8 kB] Get:22 http://archive.ubuntu.com/ubuntu xenial/main amd64 libsqlite3-0 amd64 3.11.0-1ubuntu1 [396 kB] Get:23 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libssl1.0.0 amd64 1.0.2g-1ubuntu4.12 [1085 kB] Get:24 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libpython2.7-stdlib amd64 2.7.12-1ubuntu0~16.04.3 [1880 kB] Get:25 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 python2.7 amd64 2.7.12-1ubuntu0~16.04.3 [224 kB] Get:26 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libpython-stdlib amd64 2.7.12-1~16.04 [7768 B] Get:27 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 python amd64 2.7.12-1~16.04 [137 kB] Get:28 http://archive.ubuntu.com/ubuntu xenial/main amd64 libgmp10 amd64 2:6.1.0+dfsg-2 [240 kB] Get:29 http://archive.ubuntu.com/ubuntu xenial/main amd64 libmpfr4 amd64 3.1.4-1 [191 kB] Get:30 http://archive.ubuntu.com/ubuntu xenial/main amd64 libmpc3 amd64 1.0.3-1 [39.7 kB] Get:31 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 tzdata all 2017c-0ubuntu0.16.04 [166 kB] Get:32 http://archive.ubuntu.com/ubuntu xenial/main amd64 bzip2 amd64 1.0.6-8 [32.7 kB] Get:33 http://archive.ubuntu.com/ubuntu xenial/main amd64 libmagic1 amd64 1:5.25-2ubuntu1 [216 kB] Get:34 http://archive.ubuntu.com/ubuntu xenial/main amd64 file amd64 1:5.25-2ubuntu1 [21.2 kB]

4:28 AM

Get:35 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 iproute2 amd64 4.3.0-1ubuntu3.16.04.3 [522 kB] Get:36 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 ifupdown amd64 0.8.10ubuntu1.3 [55.0 kB] Get:37 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libisc-export160 amd64 1:9.10.3.dfsg.P4-8ubuntu1.10 [153 kB] Get:38 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libdns-export162 amd64 1:9.10.3.dfsg.P4-8ubuntu1.10 [666 kB] Get:39 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 isc-dhcp-client amd64 4.3.3-5ubuntu12.10 [224 kB] Get:40 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 isc-dhcp-common amd64 4.3.3-5ubuntu12.10 [105 kB] Get:41 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 less amd64 481-2.1ubuntu0.2 [110 kB] Get:42 http://archive.ubuntu.com/ubuntu xenial/main amd64 libbsd0 amd64 0.8.2-1 [41.7 kB] Get:43 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libnettle6 amd64 3.2-1ubuntu0.16.04.1 [93.5 kB] Get:44 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libhogweed4 amd64 3.2-1ubuntu0.16.04.1 [136 kB] Get:45 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libidn11 amd64 1.32-3ubuntu1.2 [46.5 kB] Get:46 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libp11-kit0 amd64 0.23.2-5~ubuntu16.04.1 [105 kB] Get:47 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libtasn1-6 amd64 4.7-3ubuntu0.16.04.3 [43.5 kB] Get:48 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libgnutls30 amd64 3.4.10-4ubuntu1.4 [548 kB] Get:49 http://archive.ubuntu.com/ubuntu xenial/main amd64 libxtables11 amd64 1.6.0-2ubuntu3 [27.2 kB] Get:50 http://archive.ubuntu.com/ubuntu xenial/main amd64 netbase all 5.3 [12.9 kB] Get:51 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 openssl amd64 1.0.2g-1ubuntu4.12 [492 kB]

4:28 AM

Get:52 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 ca-certificates all 20170717~16.04.1 [168 kB] Get:53 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 krb5-locales all 1.13.2+dfsg-5ubuntu2 [13.2 kB] Get:54 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libroken18-heimdal amd64 1.7~git20150920+dfsg-4ubuntu1.16.04.1 [41.4 kB] Get:55 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libasn1-8-heimdal amd64 1.7~git20150920+dfsg-4ubuntu1.16.04.1 [174 kB] Get:56 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libkrb5support0 amd64 1.13.2+dfsg-5ubuntu2 [30.8 kB] Get:57 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libk5crypto3 amd64 1.13.2+dfsg-5ubuntu2 [81.2 kB] Get:58 http://archive.ubuntu.com/ubuntu xenial/main amd64 libkeyutils1 amd64 1.5.9-8ubuntu1 [9904 B] Get:59 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libkrb5-3 amd64 1.13.2+dfsg-5ubuntu2 [273 kB] Get:60 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libgssapi-krb5-2 amd64 1.13.2+dfsg-5ubuntu2 [120 kB] Get:61 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libhcrypto4-heimdal amd64 1.7~git20150920+dfsg-4ubuntu1.16.04.1 [85.0 kB] Get:62 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libheimbase1-heimdal amd64 1.7~git20150920+dfsg-4ubuntu1.16.04.1 [29.3 kB] Get:63 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libwind0-heimdal amd64 1.7~git20150920+dfsg-4ubuntu1.16.04.1 [47.8 kB] Get:64 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libhx509-5-heimdal amd64 1.7~git20150920+dfsg-4ubuntu1.16.04.1 [107 kB] Get:65 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libkrb5-26-heimdal amd64 1.7~git20150920+dfsg-4ubuntu1.16.04.1 [202 kB] Get:66 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libheimntlm0-heimdal amd64 1.7~git20150920+dfsg-4ubuntu1.16.04.1 [15.1 kB]

4:28 AM

Get:67 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libgssapi3-heimdal amd64 1.7~git20150920+dfsg-4ubuntu1.16.04.1 [96.1 kB] Get:68 http://archive.ubuntu.com/ubuntu xenial/main amd64 libsasl2-modules-db amd64 2.1.26.dfsg1-14build1 [14.5 kB] Get:69 http://archive.ubuntu.com/ubuntu xenial/main amd64 libsasl2-2 amd64 2.1.26.dfsg1-14build1 [48.7 kB] Get:70 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libldap-2.4-2 amd64 2.4.42+dfsg-2ubuntu3.2 [160 kB] Get:71 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 librtmp1 amd64 2.4+20151223.gitfa8646d-1ubuntu0.1 [54.4 kB] Get:72 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libcurl3-gnutls amd64 7.47.0-1ubuntu2.7 [185 kB] Get:73 http://archive.ubuntu.com/ubuntu xenial/main amd64 libedit2 amd64 3.1-20150325-1ubuntu2 [76.5 kB] Get:74 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libglib2.0-0 amd64 2.48.2-0ubuntu1 [1119 kB] Get:75 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libglib2.0-data all 2.48.2-0ubuntu1 [132 kB] Get:76 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libicu55 amd64 55.1-7ubuntu0.4 [7646 kB] Get:77 http://archive.ubuntu.com/ubuntu xenial/main amd64 libpipeline1 amd64 1.4.1-2 [24.6 kB] Get:78 http://archive.ubuntu.com/ubuntu xenial/main amd64 libsasl2-modules amd64 2.1.26.dfsg1-14build1 [47.5 kB] Get:79 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libxml2 amd64 2.9.3+dfsg1-1ubuntu0.5 [697 kB] Get:80 http://archive.ubuntu.com/ubuntu xenial/main amd64 libxmuu1 amd64 2:1.1.2-2 [9674 B] Get:81 http://archive.ubuntu.com/ubuntu xenial/main amd64 manpages all 4.04-2 [1087 kB] Get:82 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 openssh-client amd64 1:7.2p2-4ubuntu2.4 [589 kB] Get:83 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 rsync amd64 3.1.1-3ubuntu1.2 [329 kB]

4:28 AM

Get:84 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 shared-mime-info amd64 1.5-2ubuntu0.1 [405 kB] Get:85 http://archive.ubuntu.com/ubuntu xenial/main amd64 xauth amd64 1:1.0.9-1ubuntu2 [22.7 kB] Get:86 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 xdg-user-dirs amd64 0.15-2ubuntu6.16.04.1 [61.8 kB] Get:87 http://archive.ubuntu.com/ubuntu xenial/main amd64 xml-core all 0.13+nmu2 [23.3 kB] Get:88 http://archive.ubuntu.com/ubuntu xenial/main amd64 binfmt-support amd64 2.1.6-1 [50.7 kB] Get:89 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 binutils amd64 2.26.1-1ubuntu1~16.04.6 [2311 kB] Get:90 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libc-dev-bin amd64 2.23-0ubuntu10 [68.7 kB] Get:91 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 linux-libc-dev amd64 4.4.0-122.146 [850 kB] Get:92 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libc6-dev amd64 2.23-0ubuntu10 [2079 kB] Get:93 http://archive.ubuntu.com/ubuntu xenial/main amd64 libisl15 amd64 0.16.1-1 [524 kB] Get:94 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 cpp-5 amd64 5.4.0-6ubuntu1~16.04.9 [7685 kB] Get:95 http://archive.ubuntu.com/ubuntu xenial/main amd64 cpp amd64 4:5.3.1-1ubuntu1 [27.7 kB] Get:96 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libcc1-0 amd64 5.4.0-6ubuntu1~16.04.9 [38.8 kB] Get:97 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libgomp1 amd64 5.4.0-6ubuntu1~16.04.9 [55.0 kB] Get:98 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libitm1 amd64 5.4.0-6ubuntu1~16.04.9 [27.4 kB] Get:99 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libatomic1 amd64 5.4.0-6ubuntu1~16.04.9 [8882 B] Get:100 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libasan2 amd64 5.4.0-6ubuntu1~16.04.9 [264 kB] Get:101 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 liblsan0 amd64 5.4.0-6ubuntu1~16.04.9 [105 kB]

4:28 AM

Get:102 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libtsan0 amd64 5.4.0-6ubuntu1~16.04.9 [244 kB] Get:103 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libubsan0 amd64 5.4.0-6ubuntu1~16.04.9 [95.2 kB] Get:104 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libcilkrts5 amd64 5.4.0-6ubuntu1~16.04.9 [40.1 kB] Get:105 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libmpx0 amd64 5.4.0-6ubuntu1~16.04.9 [9774 B] Get:106 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libquadmath0 amd64 5.4.0-6ubuntu1~16.04.9 [131 kB] Get:107 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libgcc-5-dev amd64 5.4.0-6ubuntu1~16.04.9 [2242 kB] Get:108 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 gcc-5 amd64 5.4.0-6ubuntu1~16.04.9 [8650 kB] Get:109 http://archive.ubuntu.com/ubuntu xenial/main amd64 gcc amd64 4:5.3.1-1ubuntu1 [5244 B] Get:110 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libstdc++-5-dev amd64 5.4.0-6ubuntu1~16.04.9 [1427 kB] Get:111 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 g++-5 amd64 5.4.0-6ubuntu1~16.04.9 [8333 kB] Get:112 http://archive.ubuntu.com/ubuntu xenial/main amd64 g++ amd64 4:5.3.1-1ubuntu1 [1504 B] Get:113 http://archive.ubuntu.com/ubuntu xenial/main amd64 make amd64 4.1-6 [151 kB] Get:114 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libdpkg-perl all 1.18.4ubuntu1.4 [195 kB] Get:115 http://archive.ubuntu.com/ubuntu xenial/main amd64 xz-utils amd64 5.1.1alpha+20120614-2ubuntu2 [78.8 kB] Get:116 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 patch amd64 2.7.5-1ubuntu0.16.04.1 [90.5 kB] Get:117 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 dpkg-dev all 1.18.4ubuntu1.4 [584 kB] Get:118 http://archive.ubuntu.com/ubuntu xenial/main amd64 build-essential amd64 12.1ubuntu2 [4758 B]

4:28 AM

Get:119 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libllvm3.8 amd64 1:3.8-2ubuntu4 [10.3 MB] Get:120 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libobjc4 amd64 5.4.0-6ubuntu1~16.04.9 [111 kB] Get:121 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libobjc-5-dev amd64 5.4.0-6ubuntu1~16.04.9 [381 kB] Get:122 http://archive.ubuntu.com/ubuntu xenial-updates/universe amd64 libclang1-3.8 amd64 1:3.8-2ubuntu4 [4139 kB] Get:123 http://archive.ubuntu.com/ubuntu xenial-updates/universe amd64 libclang-common-3.8-dev amd64 1:3.8-2ubuntu4 [1167 kB] Get:124 http://archive.ubuntu.com/ubuntu xenial-updates/universe amd64 clang-3.8 amd64 1:3.8-2ubuntu4 [21.5 MB] Get:125 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 curl amd64 7.47.0-1ubuntu2.7 [138 kB] Get:126 http://archive.ubuntu.com/ubuntu xenial/main amd64 libfakeroot amd64 1.20.2-1ubuntu1 [25.5 kB] Get:127 http://archive.ubuntu.com/ubuntu xenial/main amd64 fakeroot amd64 1.20.2-1ubuntu1 [61.8 kB] Get:128 http://archive.ubuntu.com/ubuntu xenial/main amd64 liberror-perl all 0.17-1.2 [19.6 kB] Get:129 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 git-man all 1:2.7.4-0ubuntu1.3 [736 kB] Get:130 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 git amd64 1:2.7.4-0ubuntu1.3 [3102 kB] Get:131 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 icu-devtools amd64 55.1-7ubuntu0.4 [166 kB] Get:132 http://archive.ubuntu.com/ubuntu xenial/main amd64 libalgorithm-diff-perl all 1.19.03-1 [47.6 kB] Get:133 http://archive.ubuntu.com/ubuntu xenial/main amd64 libalgorithm-diff-xs-perl amd64 0.04-4build1 [11.0 kB] Get:134 http://archive.ubuntu.com/ubuntu xenial/main amd64 libalgorithm-merge-perl all 0.08-3 [12.0 kB] Get:135 http://archive.ubuntu.com/ubuntu xenial/main amd64 libbsd-dev amd64 0.8.2-1 [134 kB] Get:136 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libcurl3 amd64 7.47.0-1ubuntu2.7 [187 kB]

4:28 AM

Get:137 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libcurl4-openssl-dev amd64 7.47.0-1ubuntu2.7 [262 kB] Get:138 http://archive.ubuntu.com/ubuntu xenial/main amd64 libtinfo-dev amd64 6.0+20160213-1ubuntu1 [77.4 kB] Get:139 http://archive.ubuntu.com/ubuntu xenial/main amd64 libedit-dev amd64 3.1-20150325-1ubuntu2 [92.6 kB] Get:140 http://archive.ubuntu.com/ubuntu xenial/main amd64 libfile-fcntllock-perl amd64 0.22-3 [32.0 kB] Get:141 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libicu-dev amd64 55.1-7ubuntu0.4 [8566 kB] Get:142 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libpython2.7 amd64 2.7.12-1ubuntu0~16.04.3 [1070 kB] Get:143 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 zlib1g-dev amd64 1:1.2.8.dfsg-2ubuntu4.1 [168 kB] Get:144 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libssl-dev amd64 1.0.2g-1ubuntu4.12 [1343 kB] Get:145 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libssl-doc all 1.0.2g-1ubuntu4.12 [1079 kB] Get:146 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 llvm-3.8-runtime amd64 1:3.8-2ubuntu4 [72.3 kB] Get:147 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 llvm-3.8 amd64 1:3.8-2ubuntu4 [1524 kB] Get:148 http://archive.ubuntu.com/ubuntu xenial/main amd64 libjsoncpp1 amd64 1.7.2-1 [73.0 kB] Get:149 http://archive.ubuntu.com/ubuntu xenial/main amd64 libffi-dev amd64 3.2.1-4 [161 kB] Get:150 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 llvm-3.8-dev amd64 1:3.8-2ubuntu4 [16.7 MB] Get:151 http://archive.ubuntu.com/ubuntu xenial/main amd64 manpages-dev all 4.04-2 [2048 kB] Get:152 http://archive.ubuntu.com/ubuntu xenial/main amd64 pkg-config amd64 0.29.1-0ubuntu1 [45.0 kB] Get:153 http://archive.ubuntu.com/ubuntu xenial/main amd64 rename all 0.20-4 [12.0 kB] [91mdebconf: delaying package configuration, since apt-utils is not installed [0mFetched 144 MB in 17s (8332 kB/s)

4:28 AM

(Reading database ... (Reading database ... 5% (Reading database ... 10% (Reading database ... 15% (Reading database ... 20% (Reading database ... 25% (Reading database ... 30% (Reading database ... 35% (Reading database ... 40% (Reading database ... 45% (Reading database ... 50% (Reading database ... 55% (Reading database ... 60% (Reading database ... 65% (Reading database ... 70% (Reading database ... 75% (Reading database ... 80% (Reading database ... 85% (Reading database ... 90% (Reading database ... 95% (Reading database ... 100% (Reading database ... 4768 files and directories currently installed.) Preparing to unpack .../perl-base_5.22.1-9ubuntu0.3_amd64.deb ... Unpacking perl-base (5.22.1-9ubuntu0.3) over (5.22.1-9ubuntu0.2) ... Setting up perl-base (5.22.1-9ubuntu0.3) ... Selecting previously unselected package libatm1:amd64. (Reading database ... (Reading database ... 5% (Reading database ... 10% (Reading database ... 15% (Reading database ... 20% (Reading database ... 25% (Reading database ... 30% (Reading database ... 35% (Reading database ... 40% (Reading database ... 45% (Reading database ... 50% (Reading database ... 55% (Reading database ... 60% (Reading database ... 65% (Reading database ... 70% (Reading database ... 75% (Reading database ... 80% (Reading database ... 85% (Reading database ... 90% (Reading database ... 95% (Reading database ... 100% (Reading database ... 4768 files and directories currently installed.) Preparing to unpack .../libatm1_1%3a2.5.1-1.5_amd64.deb ... Unpacking libatm1:amd64 (1:2.5.1-1.5) ... Selecting previously unselected package libmnl0:amd64. Preparing to unpack .../libmnl0_1.0.3-5_amd64.deb ... Unpacking libmnl0:amd64 (1.0.3-5) ... Selecting previously unselected package libpopt0:amd64. Preparing to unpack .../libpopt0_1.16-10_amd64.deb ... Unpacking libpopt0:amd64 (1.16-10) ... Selecting previously unselected package libgdbm3:amd64.

4:28 AM

Preparing to unpack .../libgdbm3_1.8.3-13.1_amd64.deb ... Unpacking libgdbm3:amd64 (1.8.3-13.1) ... Selecting previously unselected package libxau6:amd64. Preparing to unpack .../libxau6_1%3a1.0.8-1_amd64.deb ... Unpacking libxau6:amd64 (1:1.0.8-1) ... Selecting previously unselected package libxdmcp6:amd64. Preparing to unpack .../libxdmcp6_1%3a1.1.2-1.1_amd64.deb ... Unpacking libxdmcp6:amd64 (1:1.1.2-1.1) ... Selecting previously unselected package libxcb1:amd64. Preparing to unpack .../libxcb1_1.11.1-1ubuntu1_amd64.deb ... Unpacking libxcb1:amd64 (1.11.1-1ubuntu1) ... Selecting previously unselected package libx11-data. Preparing to unpack .../libx11-data_2%3a1.6.3-1ubuntu2_all.deb ... Unpacking libx11-data (2:1.6.3-1ubuntu2) ... Selecting previously unselected package libx11-6:amd64. Preparing to unpack .../libx11-6_2%3a1.6.3-1ubuntu2_amd64.deb ... Unpacking libx11-6:amd64 (2:1.6.3-1ubuntu2) ... Selecting previously unselected package libxext6:amd64. Preparing to unpack .../libxext6_2%3a1.3.3-1_amd64.deb ... Unpacking libxext6:amd64 (2:1.3.3-1) ... Selecting previously unselected package sgml-base. Preparing to unpack .../sgml-base_1.26+nmu4ubuntu1_all.deb ... Unpacking sgml-base (1.26+nmu4ubuntu1) ... Selecting previously unselected package perl-modules-5.22. Preparing to unpack .../perl-modules-5.22_5.22.1-9ubuntu0.3_all.deb ... Unpacking perl-modules-5.22 (5.22.1-9ubuntu0.3) ... Selecting previously unselected package libperl5.22:amd64. Preparing to unpack .../libperl5.22_5.22.1-9ubuntu0.3_amd64.deb ... Unpacking libperl5.22:amd64 (5.22.1-9ubuntu0.3) ... Selecting previously unselected package perl. Preparing to unpack .../perl_5.22.1-9ubuntu0.3_amd64.deb ... Unpacking perl (5.22.1-9ubuntu0.3) ... Selecting previously unselected package libpython2.7-minimal:amd64. Preparing to unpack .../libpython2.7-minimal_2.7.12-1ubuntu0~16.04.3_amd64.deb ...

4:28 AM

Unpacking libpython2.7-minimal:amd64 (2.7.12-1ubuntu0~16.04.3) ... Selecting previously unselected package python2.7-minimal. Preparing to unpack .../python2.7-minimal_2.7.12-1ubuntu0~16.04.3_amd64.deb ... Unpacking python2.7-minimal (2.7.12-1ubuntu0~16.04.3) ... Selecting previously unselected package python-minimal. Preparing to unpack .../python-minimal_2.7.12-1~16.04_amd64.deb ... Unpacking python-minimal (2.7.12-1~16.04) ... Selecting previously unselected package mime-support. Preparing to unpack .../mime-support_3.59ubuntu1_all.deb ... Unpacking mime-support (3.59ubuntu1) ... Selecting previously unselected package libexpat1:amd64. Preparing to unpack .../libexpat1_2.1.0-7ubuntu0.16.04.3_amd64.deb ... Unpacking libexpat1:amd64 (2.1.0-7ubuntu0.16.04.3) ... Selecting previously unselected package libffi6:amd64. Preparing to unpack .../libffi6_3.2.1-4_amd64.deb ... Unpacking libffi6:amd64 (3.2.1-4) ... Selecting previously unselected package libsqlite3-0:amd64. Preparing to unpack .../libsqlite3-0_3.11.0-1ubuntu1_amd64.deb ... Unpacking libsqlite3-0:amd64 (3.11.0-1ubuntu1) ... Selecting previously unselected package libssl1.0.0:amd64. Preparing to unpack .../libssl1.0.0_1.0.2g-1ubuntu4.12_amd64.deb ... Unpacking libssl1.0.0:amd64 (1.0.2g-1ubuntu4.12) ... Selecting previously unselected package libpython2.7-stdlib:amd64. Preparing to unpack .../libpython2.7-stdlib_2.7.12-1ubuntu0~16.04.3_amd64.deb ... Unpacking libpython2.7-stdlib:amd64 (2.7.12-1ubuntu0~16.04.3) ... Selecting previously unselected package python2.7. Preparing to unpack .../python2.7_2.7.12-1ubuntu0~16.04.3_amd64.deb ... Unpacking python2.7 (2.7.12-1ubuntu0~16.04.3) ... Selecting previously unselected package libpython-stdlib:amd64. Preparing to unpack .../libpython-stdlib_2.7.12-1~16.04_amd64.deb ... Unpacking libpython-stdlib:amd64 (2.7.12-1~16.04) ... Processing triggers for libc-bin (2.23-0ubuntu10) ...

4:28 AM

Setting up libpython2.7-minimal:amd64 (2.7.12-1ubuntu0~16.04.3) ... Setting up python2.7-minimal (2.7.12-1ubuntu0~16.04.3) ... Linking and byte-compiling packages for runtime python2.7... Setting up python-minimal (2.7.12-1~16.04) ... Selecting previously unselected package python. (Reading database ... (Reading database ... 5% (Reading database ... 10% (Reading database ... 15% (Reading database ... 20% (Reading database ... 25% (Reading database ... 30% (Reading database ... 35% (Reading database ... 40% (Reading database ... 45% (Reading database ... 50% (Reading database ... 55% (Reading database ... 60% (Reading database ... 65% (Reading database ... 70% (Reading database ... 75% (Reading database ... 80% (Reading database ... 85% (Reading database ... 90% (Reading database ... 95% (Reading database ... 100% (Reading database ... 7683 files and directories currently installed.) Preparing to unpack .../python_2.7.12-1~16.04_amd64.deb ... Unpacking python (2.7.12-1~16.04) ... Selecting previously unselected package libgmp10:amd64. Preparing to unpack .../libgmp10_2%3a6.1.0+dfsg-2_amd64.deb ... Unpacking libgmp10:amd64 (2:6.1.0+dfsg-2) ... Selecting previously unselected package libmpfr4:amd64. Preparing to unpack .../libmpfr4_3.1.4-1_amd64.deb ... Unpacking libmpfr4:amd64 (3.1.4-1) ... Selecting previously unselected package libmpc3:amd64. Preparing to unpack .../libmpc3_1.0.3-1_amd64.deb ... Unpacking libmpc3:amd64 (1.0.3-1) ... Selecting previously unselected package tzdata. Preparing to unpack .../tzdata_2017c-0ubuntu0.16.04_all.deb ... Unpacking tzdata (2017c-0ubuntu0.16.04) ... Selecting previously unselected package bzip2. Preparing to unpack .../bzip2_1.0.6-8_amd64.deb ... Unpacking bzip2 (1.0.6-8) ... Selecting previously unselected package libmagic1:amd64. Preparing to unpack .../libmagic1_1%3a5.25-2ubuntu1_amd64.deb ... Unpacking libmagic1:amd64 (1:5.25-2ubuntu1) ...

4:28 AM

Selecting previously unselected package file. Preparing to unpack .../file_1%3a5.25-2ubuntu1_amd64.deb ... Unpacking file (1:5.25-2ubuntu1) ... Selecting previously unselected package iproute2. Preparing to unpack .../iproute2_4.3.0-1ubuntu3.16.04.3_amd64.deb ... Unpacking iproute2 (4.3.0-1ubuntu3.16.04.3) ... Selecting previously unselected package ifupdown. Preparing to unpack .../ifupdown_0.8.10ubuntu1.3_amd64.deb ... Unpacking ifupdown (0.8.10ubuntu1.3) ... Selecting previously unselected package libisc-export160. Preparing to unpack .../libisc-export160_1%3a9.10.3.dfsg.P4-8ubuntu1.10_amd64.deb ... Unpacking libisc-export160 (1:9.10.3.dfsg.P4-8ubuntu1.10) ... Selecting previously unselected package libdns-export162. Preparing to unpack .../libdns-export162_1%3a9.10.3.dfsg.P4-8ubuntu1.10_amd64.deb ... Unpacking libdns-export162 (1:9.10.3.dfsg.P4-8ubuntu1.10) ... Selecting previously unselected package isc-dhcp-client. Preparing to unpack .../isc-dhcp-client_4.3.3-5ubuntu12.10_amd64.deb ... Unpacking isc-dhcp-client (4.3.3-5ubuntu12.10) ... Selecting previously unselected package isc-dhcp-common. Preparing to unpack .../isc-dhcp-common_4.3.3-5ubuntu12.10_amd64.deb ... Unpacking isc-dhcp-common (4.3.3-5ubuntu12.10) ... Selecting previously unselected package less. Preparing to unpack .../less_481-2.1ubuntu0.2_amd64.deb ... Unpacking less (481-2.1ubuntu0.2) ... Selecting previously unselected package libbsd0:amd64. Preparing to unpack .../libbsd0_0.8.2-1_amd64.deb ... Unpacking libbsd0:amd64 (0.8.2-1) ... Selecting previously unselected package libnettle6:amd64. Preparing to unpack .../libnettle6_3.2-1ubuntu0.16.04.1_amd64.deb ... Unpacking libnettle6:amd64 (3.2-1ubuntu0.16.04.1) ... Selecting previously unselected package libhogweed4:amd64. Preparing to unpack .../libhogweed4_3.2-1ubuntu0.16.04.1_amd64.deb ... Unpacking libhogweed4:amd64 (3.2-1ubuntu0.16.04.1) ...

4:28 AM

Selecting previously unselected package libidn11:amd64. Preparing to unpack .../libidn11_1.32-3ubuntu1.2_amd64.deb ... Unpacking libidn11:amd64 (1.32-3ubuntu1.2) ... Selecting previously unselected package libp11-kit0:amd64. Preparing to unpack .../libp11-kit0_0.23.2-5~ubuntu16.04.1_amd64.deb ... Unpacking libp11-kit0:amd64 (0.23.2-5~ubuntu16.04.1) ... Selecting previously unselected package libtasn1-6:amd64. Preparing to unpack .../libtasn1-6_4.7-3ubuntu0.16.04.3_amd64.deb ... Unpacking libtasn1-6:amd64 (4.7-3ubuntu0.16.04.3) ... Selecting previously unselected package libgnutls30:amd64. Preparing to unpack .../libgnutls30_3.4.10-4ubuntu1.4_amd64.deb ... Unpacking libgnutls30:amd64 (3.4.10-4ubuntu1.4) ... Selecting previously unselected package libxtables11:amd64. Preparing to unpack .../libxtables11_1.6.0-2ubuntu3_amd64.deb ... Unpacking libxtables11:amd64 (1.6.0-2ubuntu3) ... Selecting previously unselected package netbase. Preparing to unpack .../archives/netbase_5.3_all.deb ... Unpacking netbase (5.3) ... Selecting previously unselected package openssl. Preparing to unpack .../openssl_1.0.2g-1ubuntu4.12_amd64.deb ... Unpacking openssl (1.0.2g-1ubuntu4.12) ... Selecting previously unselected package ca-certificates. Preparing to unpack .../ca-certificates_20170717~16.04.1_all.deb ... Unpacking ca-certificates (20170717~16.04.1) ... Selecting previously unselected package krb5-locales. Preparing to unpack .../krb5-locales_1.13.2+dfsg-5ubuntu2_all.deb ... Unpacking krb5-locales (1.13.2+dfsg-5ubuntu2) ... Selecting previously unselected package libroken18-heimdal:amd64. Preparing to unpack .../libroken18-heimdal_1.7~git20150920+dfsg-4ubuntu1.16.04.1_amd64.deb ... Unpacking libroken18-heimdal:amd64 (1.7~git20150920+dfsg-4ubuntu1.16.04.1) ... Selecting previously unselected package libasn1-8-heimdal:amd64.

4:28 AM

Preparing to unpack .../libasn1-8-heimdal_1.7~git20150920+dfsg-4ubuntu1.16.04.1_amd64.deb ... Unpacking libasn1-8-heimdal:amd64 (1.7~git20150920+dfsg-4ubuntu1.16.04.1) ... Selecting previously unselected package libkrb5support0:amd64. Preparing to unpack .../libkrb5support0_1.13.2+dfsg-5ubuntu2_amd64.deb ... Unpacking libkrb5support0:amd64 (1.13.2+dfsg-5ubuntu2) ... Selecting previously unselected package libk5crypto3:amd64. Preparing to unpack .../libk5crypto3_1.13.2+dfsg-5ubuntu2_amd64.deb ... Unpacking libk5crypto3:amd64 (1.13.2+dfsg-5ubuntu2) ... Selecting previously unselected package libkeyutils1:amd64. Preparing to unpack .../libkeyutils1_1.5.9-8ubuntu1_amd64.deb ... Unpacking libkeyutils1:amd64 (1.5.9-8ubuntu1) ... Selecting previously unselected package libkrb5-3:amd64. Preparing to unpack .../libkrb5-3_1.13.2+dfsg-5ubuntu2_amd64.deb ... Unpacking libkrb5-3:amd64 (1.13.2+dfsg-5ubuntu2) ... Selecting previously unselected package libgssapi-krb5-2:amd64. Preparing to unpack .../libgssapi-krb5-2_1.13.2+dfsg-5ubuntu2_amd64.deb ... Unpacking libgssapi-krb5-2:amd64 (1.13.2+dfsg-5ubuntu2) ... Selecting previously unselected package libhcrypto4-heimdal:amd64. Preparing to unpack .../libhcrypto4-heimdal_1.7~git20150920+dfsg-4ubuntu1.16.04.1_amd64.deb ... Unpacking libhcrypto4-heimdal:amd64 (1.7~git20150920+dfsg-4ubuntu1.16.04.1) ... Selecting previously unselected package libheimbase1-heimdal:amd64. Preparing to unpack .../libheimbase1-heimdal_1.7~git20150920+dfsg-4ubuntu1.16.04.1_amd64.deb ... Unpacking libheimbase1-heimdal:amd64 (1.7~git20150920+dfsg-4ubuntu1.16.04.1) ... Selecting previously unselected package libwind0-heimdal:amd64. Preparing to unpack .../libwind0-heimdal_1.7~git20150920+dfsg-4ubuntu1.16.04.1_amd64.deb ... Unpacking libwind0-heimdal:amd64 (1.7~git20150920+dfsg-4ubuntu1.16.04.1) ... Selecting previously unselected package libhx509-5-heimdal:amd64.

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Unpacking libedit-dev:amd64 (3.1-20150325-1ubuntu2) ... Selecting previously unselected package libfile-fcntllock-perl. Preparing to unpack .../libfile-fcntllock-perl_0.22-3_amd64.deb ... Unpacking libfile-fcntllock-perl (0.22-3) ... Selecting previously unselected package libicu-dev:amd64. Preparing to unpack .../libicu-dev_55.1-7ubuntu0.4_amd64.deb ... Unpacking libicu-dev:amd64 (55.1-7ubuntu0.4) ... Selecting previously unselected package libpython2.7:amd64. Preparing to unpack .../libpython2.7_2.7.12-1ubuntu0~16.04.3_amd64.deb ... Unpacking libpython2.7:amd64 (2.7.12-1ubuntu0~16.04.3) ... Selecting previously unselected package zlib1g-dev:amd64. Preparing to unpack .../zlib1g-dev_1%3a1.2.8.dfsg-2ubuntu4.1_amd64.deb ... Unpacking zlib1g-dev:amd64 (1:1.2.8.dfsg-2ubuntu4.1) ... Selecting previously unselected package libssl-dev:amd64. Preparing to unpack .../libssl-dev_1.0.2g-1ubuntu4.12_amd64.deb ... Unpacking libssl-dev:amd64 (1.0.2g-1ubuntu4.12) ... Selecting previously unselected package libssl-doc. Preparing to unpack .../libssl-doc_1.0.2g-1ubuntu4.12_all.deb ... Unpacking libssl-doc (1.0.2g-1ubuntu4.12) ... Selecting previously unselected package llvm-3.8-runtime. Preparing to unpack .../llvm-3.8-runtime_1%3a3.8-2ubuntu4_amd64.deb ... Unpacking llvm-3.8-runtime (1:3.8-2ubuntu4) ... Selecting previously unselected package llvm-3.8. Preparing to unpack .../llvm-3.8_1%3a3.8-2ubuntu4_amd64.deb ... Unpacking llvm-3.8 (1:3.8-2ubuntu4) ... Selecting previously unselected package libjsoncpp1:amd64. Preparing to unpack .../libjsoncpp1_1.7.2-1_amd64.deb ... Unpacking libjsoncpp1:amd64 (1.7.2-1) ... Selecting previously unselected package libffi-dev:amd64. Preparing to unpack .../libffi-dev_3.2.1-4_amd64.deb ... Unpacking libffi-dev:amd64 (3.2.1-4) ... Selecting previously unselected package llvm-3.8-dev. Preparing to unpack .../llvm-3.8-dev_1%3a3.8-2ubuntu4_amd64.deb ...

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Unpacking llvm-3.8-dev (1:3.8-2ubuntu4) ... Selecting previously unselected package manpages-dev. Preparing to unpack .../manpages-dev_4.04-2_all.deb ... Unpacking manpages-dev (4.04-2) ... Selecting previously unselected package pkg-config. Preparing to unpack .../pkg-config_0.29.1-0ubuntu1_amd64.deb ... Unpacking pkg-config (0.29.1-0ubuntu1) ... Selecting previously unselected package rename. Preparing to unpack .../archives/rename_0.20-4_all.deb ... Unpacking rename (0.20-4) ... Processing triggers for libc-bin (2.23-0ubuntu10) ... Processing triggers for systemd (229-4ubuntu21.1) ... Setting up libatm1:amd64 (1:2.5.1-1.5) ... Setting up libmnl0:amd64 (1.0.3-5) ... Setting up libpopt0:amd64 (1.16-10) ... Setting up libgdbm3:amd64 (1.8.3-13.1) ... Setting up libxau6:amd64 (1:1.0.8-1) ... Setting up libxdmcp6:amd64 (1:1.1.2-1.1) ... Setting up libxcb1:amd64 (1.11.1-1ubuntu1) ... Setting up libx11-data (2:1.6.3-1ubuntu2) ... Setting up libx11-6:amd64 (2:1.6.3-1ubuntu2) ... Setting up libxext6:amd64 (2:1.3.3-1) ... Setting up sgml-base (1.26+nmu4ubuntu1) ... Setting up perl-modules-5.22 (5.22.1-9ubuntu0.3) ... Setting up libperl5.22:amd64 (5.22.1-9ubuntu0.3) ... Setting up perl (5.22.1-9ubuntu0.3) ... update-alternatives: using /usr/bin/prename to provide /usr/bin/rename (rename) in auto mode Setting up mime-support (3.59ubuntu1) ... Setting up libexpat1:amd64 (2.1.0-7ubuntu0.16.04.3) ... Setting up libffi6:amd64 (3.2.1-4) ... Setting up libsqlite3-0:amd64 (3.11.0-1ubuntu1) ... Setting up libssl1.0.0:amd64 (1.0.2g-1ubuntu4.12) ... debconf: unable to initialize frontend: Dialog debconf: (TERM is not set, so the dialog frontend is not usable.) debconf: falling back to frontend: Readline Setting up libpython2.7-stdlib:amd64 (2.7.12-1ubuntu0~16.04.3) ... Setting up python2.7 (2.7.12-1ubuntu0~16.04.3) ... Setting up libpython-stdlib:amd64 (2.7.12-1~16.04) ...

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Setting up python (2.7.12-1~16.04) ... Setting up libgmp10:amd64 (2:6.1.0+dfsg-2) ... Setting up libmpfr4:amd64 (3.1.4-1) ... Setting up libmpc3:amd64 (1.0.3-1) ... Setting up tzdata (2017c-0ubuntu0.16.04) ... debconf: unable to initialize frontend: Dialog debconf: (TERM is not set, so the dialog frontend is not usable.) debconf: falling back to frontend: Readline Current default time zone: 'Etc/UTC' Local time is now: Sat May 5 04:27:22 UTC 2018. Universal Time is now: Sat May 5 04:27:22 UTC 2018. Run 'dpkg-reconfigure tzdata' if you wish to change it. Setting up bzip2 (1.0.6-8) ... Setting up libmagic1:amd64 (1:5.25-2ubuntu1) ... Setting up file (1:5.25-2ubuntu1) ... Setting up iproute2 (4.3.0-1ubuntu3.16.04.3) ... Setting up ifupdown (0.8.10ubuntu1.3) ... Creating /etc/network/interfaces. Setting up libisc-export160 (1:9.10.3.dfsg.P4-8ubuntu1.10) ... Setting up libdns-export162 (1:9.10.3.dfsg.P4-8ubuntu1.10) ... Setting up isc-dhcp-client (4.3.3-5ubuntu12.10) ... Setting up isc-dhcp-common (4.3.3-5ubuntu12.10) ... Setting up less (481-2.1ubuntu0.2) ... debconf: unable to initialize frontend: Dialog debconf: (TERM is not set, so the dialog frontend is not usable.) debconf: falling back to frontend: Readline Setting up libbsd0:amd64 (0.8.2-1) ... Setting up libnettle6:amd64 (3.2-1ubuntu0.16.04.1) ... Setting up libhogweed4:amd64 (3.2-1ubuntu0.16.04.1) ... Setting up libidn11:amd64 (1.32-3ubuntu1.2) ... Setting up libp11-kit0:amd64 (0.23.2-5~ubuntu16.04.1) ... Setting up libtasn1-6:amd64 (4.7-3ubuntu0.16.04.3) ... Setting up libgnutls30:amd64 (3.4.10-4ubuntu1.4) ... Setting up libxtables11:amd64 (1.6.0-2ubuntu3) ... Setting up netbase (5.3) ... Setting up openssl (1.0.2g-1ubuntu4.12) ... Setting up ca-certificates (20170717~16.04.1) ... debconf: unable to initialize frontend: Dialog debconf: (TERM is not set, so the dialog frontend is not usable.)

4:29 AM

debconf: falling back to frontend: Readline Setting up krb5-locales (1.13.2+dfsg-5ubuntu2) ... Setting up libroken18-heimdal:amd64 (1.7~git20150920+dfsg-4ubuntu1.16.04.1) ... Setting up libasn1-8-heimdal:amd64 (1.7~git20150920+dfsg-4ubuntu1.16.04.1) ... Setting up libkrb5support0:amd64 (1.13.2+dfsg-5ubuntu2) ... Setting up libk5crypto3:amd64 (1.13.2+dfsg-5ubuntu2) ... Setting up libkeyutils1:amd64 (1.5.9-8ubuntu1) ... Setting up libkrb5-3:amd64 (1.13.2+dfsg-5ubuntu2) ... Setting up libgssapi-krb5-2:amd64 (1.13.2+dfsg-5ubuntu2) ... Setting up libhcrypto4-heimdal:amd64 (1.7~git20150920+dfsg-4ubuntu1.16.04.1) ... Setting up libheimbase1-heimdal:amd64 (1.7~git20150920+dfsg-4ubuntu1.16.04.1) ... Setting up libwind0-heimdal:amd64 (1.7~git20150920+dfsg-4ubuntu1.16.04.1) ... Setting up libhx509-5-heimdal:amd64 (1.7~git20150920+dfsg-4ubuntu1.16.04.1) ... Setting up libkrb5-26-heimdal:amd64 (1.7~git20150920+dfsg-4ubuntu1.16.04.1) ... Setting up libheimntlm0-heimdal:amd64 (1.7~git20150920+dfsg-4ubuntu1.16.04.1) ... Setting up libgssapi3-heimdal:amd64 (1.7~git20150920+dfsg-4ubuntu1.16.04.1) ... Setting up libsasl2-modules-db:amd64 (2.1.26.dfsg1-14build1) ... Setting up libsasl2-2:amd64 (2.1.26.dfsg1-14build1) ... Setting up libldap-2.4-2:amd64 (2.4.42+dfsg-2ubuntu3.2) ... Setting up librtmp1:amd64 (2.4+20151223.gitfa8646d-1ubuntu0.1) ... Setting up libcurl3-gnutls:amd64 (7.47.0-1ubuntu2.7) ... Setting up libedit2:amd64 (3.1-20150325-1ubuntu2) ... Setting up libglib2.0-0:amd64 (2.48.2-0ubuntu1) ... No schema files found: doing nothing. Setting up libglib2.0-data (2.48.2-0ubuntu1) ... Setting up libicu55:amd64 (55.1-7ubuntu0.4) ... Setting up libpipeline1:amd64 (1.4.1-2) ... Setting up libsasl2-modules:amd64 (2.1.26.dfsg1-14build1) ... Setting up libxml2:amd64 (2.9.3+dfsg1-1ubuntu0.5) ... Setting up libxmuu1:amd64 (2:1.1.2-2) ... Setting up manpages (4.04-2) ...

4:29 AM

Setting up openssh-client (1:7.2p2-4ubuntu2.4) ... Setting up rsync (3.1.1-3ubuntu1.2) ... invoke-rc.d: could not determine current runlevel invoke-rc.d: policy-rc.d denied execution of restart. Setting up shared-mime-info (1.5-2ubuntu0.1) ... Setting up xauth (1:1.0.9-1ubuntu2) ... Setting up xdg-user-dirs (0.15-2ubuntu6.16.04.1) ... Setting up xml-core (0.13+nmu2) ... Setting up binfmt-support (2.1.6-1) ... mount: permission denied update-binfmts: warning: Couldn't mount the binfmt_misc filesystem on /proc/sys/fs/binfmt_misc. mount: permission denied update-binfmts: warning: Couldn't mount the binfmt_misc filesystem on /proc/sys/fs/binfmt_misc. invoke-rc.d: could not determine current runlevel invoke-rc.d: policy-rc.d denied execution of start. Setting up binutils (2.26.1-1ubuntu1~16.04.6) ... Setting up libc-dev-bin (2.23-0ubuntu10) ... Setting up linux-libc-dev:amd64 (4.4.0-122.146) ... Setting up libc6-dev:amd64 (2.23-0ubuntu10) ... Setting up libisl15:amd64 (0.16.1-1) ... Setting up cpp-5 (5.4.0-6ubuntu1~16.04.9) ... Setting up cpp (4:5.3.1-1ubuntu1) ... Setting up libcc1-0:amd64 (5.4.0-6ubuntu1~16.04.9) ... Setting up libgomp1:amd64 (5.4.0-6ubuntu1~16.04.9) ... Setting up libitm1:amd64 (5.4.0-6ubuntu1~16.04.9) ... Setting up libatomic1:amd64 (5.4.0-6ubuntu1~16.04.9) ... Setting up libasan2:amd64 (5.4.0-6ubuntu1~16.04.9) ... Setting up liblsan0:amd64 (5.4.0-6ubuntu1~16.04.9) ... Setting up libtsan0:amd64 (5.4.0-6ubuntu1~16.04.9) ... Setting up libubsan0:amd64 (5.4.0-6ubuntu1~16.04.9) ... Setting up libcilkrts5:amd64 (5.4.0-6ubuntu1~16.04.9) ... Setting up libmpx0:amd64 (5.4.0-6ubuntu1~16.04.9) ... Setting up libquadmath0:amd64 (5.4.0-6ubuntu1~16.04.9) ... Setting up libgcc-5-dev:amd64 (5.4.0-6ubuntu1~16.04.9) ... Setting up gcc-5 (5.4.0-6ubuntu1~16.04.9) ... Setting up gcc (4:5.3.1-1ubuntu1) ... Setting up libstdc++-5-dev:amd64 (5.4.0-6ubuntu1~16.04.9) ...

4:29 AM

Setting up g++-5 (5.4.0-6ubuntu1~16.04.9) ... Setting up g++ (4:5.3.1-1ubuntu1) ... update-alternatives: using /usr/bin/g++ to provide /usr/bin/c++ (c++) in auto mode Setting up make (4.1-6) ... Setting up libdpkg-perl (1.18.4ubuntu1.4) ... Setting up xz-utils (5.1.1alpha+20120614-2ubuntu2) ... update-alternatives: using /usr/bin/xz to provide /usr/bin/lzma (lzma) in auto mode Setting up patch (2.7.5-1ubuntu0.16.04.1) ... Setting up dpkg-dev (1.18.4ubuntu1.4) ... Setting up build-essential (12.1ubuntu2) ... Setting up libllvm3.8:amd64 (1:3.8-2ubuntu4) ... Setting up libobjc4:amd64 (5.4.0-6ubuntu1~16.04.9) ... Setting up libobjc-5-dev:amd64 (5.4.0-6ubuntu1~16.04.9) ... Setting up libclang1-3.8:amd64 (1:3.8-2ubuntu4) ... Setting up libclang-common-3.8-dev (1:3.8-2ubuntu4) ... Setting up clang-3.8 (1:3.8-2ubuntu4) ... Setting up curl (7.47.0-1ubuntu2.7) ... Setting up libfakeroot:amd64 (1.20.2-1ubuntu1) ... Setting up fakeroot (1.20.2-1ubuntu1) ... update-alternatives: using /usr/bin/fakeroot-sysv to provide /usr/bin/fakeroot (fakeroot) in auto mode Setting up liberror-perl (0.17-1.2) ... Setting up git-man (1:2.7.4-0ubuntu1.3) ... Setting up git (1:2.7.4-0ubuntu1.3) ... Setting up icu-devtools (55.1-7ubuntu0.4) ... Setting up libalgorithm-diff-perl (1.19.03-1) ... Setting up libalgorithm-diff-xs-perl (0.04-4build1) ... Setting up libalgorithm-merge-perl (0.08-3) ... Setting up libbsd-dev:amd64 (0.8.2-1) ... Setting up libcurl3:amd64 (7.47.0-1ubuntu2.7) ... Setting up libcurl4-openssl-dev:amd64 (7.47.0-1ubuntu2.7) ... Setting up libtinfo-dev:amd64 (6.0+20160213-1ubuntu1) ... Setting up libedit-dev:amd64 (3.1-20150325-1ubuntu2) ... Setting up libfile-fcntllock-perl (0.22-3) ... Setting up libicu-dev:amd64 (55.1-7ubuntu0.4) ... Setting up libpython2.7:amd64 (2.7.12-1ubuntu0~16.04.3) ... Setting up zlib1g-dev:amd64 (1:1.2.8.dfsg-2ubuntu4.1) ...

4:29 AM

Setting up libssl-dev:amd64 (1.0.2g-1ubuntu4.12) ... Setting up libssl-doc (1.0.2g-1ubuntu4.12) ... Setting up llvm-3.8-runtime (1:3.8-2ubuntu4) ... mount: permission denied update-binfmts: warning: Couldn't mount the binfmt_misc filesystem on /proc/sys/fs/binfmt_misc. Setting up llvm-3.8 (1:3.8-2ubuntu4) ... Setting up libjsoncpp1:amd64 (1.7.2-1) ... Setting up libffi-dev:amd64 (3.2.1-4) ... Setting up llvm-3.8-dev (1:3.8-2ubuntu4) ... Setting up manpages-dev (4.04-2) ... Setting up pkg-config (0.29.1-0ubuntu1) ... Setting up rename (0.20-4) ... update-alternatives: using /usr/bin/file-rename to provide /usr/bin/rename (rename) in auto mode Processing triggers for libc-bin (2.23-0ubuntu10) ... Processing triggers for systemd (229-4ubuntu21.1) ... Processing triggers for ca-certificates (20170717~16.04.1) ... Updating certificates in /etc/ssl/certs... 148 added, 0 removed; done. Running hooks in /etc/ca-certificates/update.d... done. Processing triggers for sgml-base (1.26+nmu4ubuntu1) ... Removing intermediate container 9413e8e47de6 ---> 9095c304757c Step 5/10 : ARG SWIFT_PLATFORM=ubuntu16.04 ---> Running in 520a54e6a6f3 Removing intermediate container 520a54e6a6f3 ---> 7510559c68e5 Step 6/10 : ARG SWIFT_BRANCH=swift-4.1-release ---> Running in 8b10901f7a42 Removing intermediate container 8b10901f7a42 ---> 98b501a2543e Step 7/10 : ARG SWIFT_VERSION=swift-4.1-RELEASE ---> Running in d43316b226e3 Removing intermediate container d43316b226e3 ---> 5b12a9e7e8ff Step 8/10 : ENV SWIFT_PLATFORM=$SWIFT_PLATFORM SWIFT_BRANCH=$SWIFT_BRANCH SWIFT_VERSION=$SWIFT_VERSION ---> Running in 9e2440fd6f0f Removing intermediate container 9e2440fd6f0f ---> 074b576c8827

4:29 AM

Step 9/10 : RUN SWIFT_URL=https://swift.org/builds/$SWIFT_BRANCH/$(echo "$SWIFT_PLATFORM" | tr -d .)/$SWIFT_VERSION/$SWIFT_VERSION-$SWIFT_PLATFORM.tar.gz && curl -fSsL $SWIFT_URL -o swift.tar.gz && curl -fSsL $SWIFT_URL.sig -o swift.tar.gz.sig && export GNUPGHOME="$(mktemp -d)" && tar -xzf swift.tar.gz --directory / --strip-components=1 && rm -r "$GNUPGHOME" swift.tar.gz.sig swift.tar.gz && chmod -R o+r /usr/lib/swift ---> Running in 7eb559ffc45c Removing intermediate container 7eb559ffc45c ---> 28c481c0e9d6 Step 10/10 : RUN swift --version ---> Running in e3bf81d48e82 Swift version 4.1.1 (swift-4.1.1-RELEASE) Target: x86_64-unknown-linux-gnu Removing intermediate container e3bf81d48e82 ---> fe9cd801dc6b Successfully built fe9cd801dc6b Successfully tagged kishikawakatsumi/swift:4.1.1 ```

1

びっくりしたｗ

申し訳ない。。。

4:29 AM

作った私もびっくりしました。

お、~~行単位~~行区切りで自動分割投稿する仕組みがあるのかな？>discord.js (edited)

discode.jsはsend(contents, options)みたいなAPIになっていて、optionsに{split: true}で自動的に分割してくれます。

なるほど。

ただ、いつも思ったよりたくさん出るので、今のところ使いどころがありません。。。

4:37 AM

@swiftbot versions

1

4.0.2 4.1.1 2018-04-25-a 2018-05-02-a 4.1 4.0.3 4.0 3.1.1 3.1 3.0.2 3.0.1

GitHubのTags APIで2018-05-02-aが出てこないのなんでかな。 curl https://api.github.com/repos/apple/swift/tags

GraphQLだと返ってきます。

{ "data": { "repository": { "refs": { "pageInfo": { "endCursor": "MTAw", "hasNextPage": true, "startCursor": "MQ==" }, "tags": [ { "name": "swift-4.2-DEVELOPMENT-SNAPSHOT-2018-05-02-a" }, { "name": "swift-4.1.1-RELEASE" }, { "name": "swift-DEVELOPMENT-SNAPSHOT-2018-04-25-a" }, …

@norio_nomura Thanks. GraphQL使ってみます。

5:42 AM

REST APIはObsoleteになっていくのかなあ。

ちなみにクエリはこんな感じ。

query ($owner: String!, $name: String!, $cursor: String = "") { repository(owner: $owner, name: $name) { refs(refPrefix: "refs/tags/", first: 100, after: $cursor, orderBy: {field: TAG_COMMIT_DATE, direction: DESC}) { pageInfo { endCursor hasNextPage startCursor } tags: nodes { name } } } }

Query Variables: { "owner": "apple", "name": "swift", "cursor": "" } (edited)

5:45 AM

ページングはcursorに前のendCursorを渡す。

5:47 AM

curl https://api.github.com/repos/apple/swift/tagsでタグ一覧を取得する方法は、そもそもAPIドキュメントに載ってないので、非公式な動作なのかも？ https://developer.github.com/v3/git/tags/

5:49 AM

というか、ドキュメントに載ってなかったのでGraphQLを使うようにしました。

いや、ドキュメント見て作ったリクエストなのでどこかに載ってるはずです。

5:49 AM

Releases APIからTags APIに行って、そこに載ってたと思います。

5:50 AM

https://developer.github.com/v3/repos/#list-tags

なるほど、ありがとうございます。

@norio_nomura どうもどうも。いただいたクエリで取れました。

1

@swiftbot !install --list

swift-4.2-DEVELOPMENT-SNAPSHOT-2018-05-02-a swift-4.1.1-RELEASE swift-DEVELOPMENT-SNAPSHOT-2018-04-25-a swift-DEVELOPMENT-SNAPSHOT-2018-04-24-a swift-4.2-DEVELOPMENT-SNAPSHOT-2018-04-23-a swift-DEVELOPMENT-SNAPSHOT-2018-04-23-a swift-DEVELOPMENT-SNAPSHOT-2018-04-22-a swift-DEVELOPMENT-SNAPSHOT-2018-04-21-a swift-DEVELOPMENT-SNAPSHOT-2018-04-20-a swift-DEVELOPMENT-SNAPSHOT-2018-04-19-a ...

@swiftbot versions

2018-05-02-a 2018-04-25-a 4.1.1 4.1 4.0.3 4.0.2 4.0 3.1.1 3.1 3.0.2 3.0.1

@swiftbot !install swift-4.2-DEVELOPMENT-SNAPSHOT-2018-04-23-a

install: missing destination file operand after 'swift-4.2-DEVELOPMENT-SNAPSHOT-2018-04-23-a' Try 'install --help' for more information.

@swiftbot !install swift-4.2-DEVELOPMENT-SNAPSHOT-2018-04-23-a

install: missing destination file operand after 'swift-4.2-DEVELOPMENT-SNAPSHOT-2018-04-23-a' Try 'install --help' for more information.

@swiftbot !install swift-4.2-DEVELOPMENT-SNAPSHOT-2018-04-23-a

Sending build context to Docker daemon 89.73MB Step 1/10 : FROM ubuntu:16.04 ---> f975c5035748 Step 2/10 : LABEL maintainer="Katsumi Kishikawa <kishikawakatsumi@mac.com>" ---> Running in 3cad3c7b2297 Removing intermediate container 3cad3c7b2297 ---> 14b761354421 Step 3/10 : LABEL Description="Docker Container for the Apple's Swift programming language" ---> Running in 1ac6435d7538 Removing intermediate container 1ac6435d7538 ---> e199f6c5ff72 Step 4/10 : RUN apt-get -q update && apt-get -q install -y make libc6-dev clang-3.8 curl libedit-dev libpython2.7 libicu-dev libssl-dev libxml2 tzdata git libcurl4-openssl-dev pkg-config && update-alternatives --quiet --install /usr/bin/clang clang /usr/bin/clang-3.8 100 && update-alternatives --quiet --install /usr/bin/clang++ clang++ /usr/bin/clang++-3.8 100 && rm -r /var/lib/apt/lists/* ---> Running in 0fb9c293500c Get:1 http://security.ubuntu.com/ubuntu xenial-security InRelease [107 kB] Get:2 http://archive.ubuntu.com/ubuntu xenial InRelease [247 kB] Get:3 http://security.ubuntu.com/ubuntu xenial-security/universe Sources [80.4 kB] Get:4 http://security.ubuntu.com/ubuntu xenial-security/main amd64 Packages [612 kB] Get:5 http://security.ubuntu.com/ubuntu xenial-security/restricted amd64 Packages [12.7 kB] Get:6 http://security.ubuntu.com/ubuntu xenial-security/universe amd64 Packages [436 kB] Get:7 http://security.ubuntu.com/ubuntu xenial-security/multiverse amd64 Packages [3755 B] Get:8 http://archive.ubuntu.com/ubuntu xenial-updates InRelease [109 kB] Get:9 http://archive.ubuntu.com/ubuntu xenial-backports InRelease [107 kB] Get:10 http://archive.ubuntu.com/ubuntu xenial/universe Sources [9802 kB] Get:11 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages [1558 kB] Get:12 http://archive.ubuntu.com/ubuntu xenial/restricted amd64 Packages [14.1 kB] ...

log.txt

64.19 KB

@swiftbot versions

2018-05-02-a 2018-04-25-a 2018-04-23-a 4.1.1 4.1 4.0.3 4.0.2 4.0 3.1.1 3.1 3.0.2 3.0.1

@swiftbot

import SwiftyMath import SwiftyTopology let S = SimplicialComplex.sphere(dim:3) let H = Homology(S, Int.self) print(H.detailDescription) import Foundation import RxSwift _ = Observable<String>.create { observerOfString in print("Observable created") observerOfString.on(.next("😉")) observerOfString.on(.completed) return Disposables.create() } .subscribe { event in print(event) } import CryptoSwift let data = Data(bytes: [0x01, 0x02, 0x03]) let bytes = data.bytes print(bytes) print(Array<UInt8>(hex: "0x010203")) print(bytes.toHexString()) print("123".md5())

1

kishikawakatsumi

import SwiftyMath import SwiftyTopology let S = SimplicialComplex.sphere(dim:3) let H = Homology(S, Int.self) print(H.detailDescription) import Foundation import RxSwift _ = Observable<String>.create { observerOfString in print("Observable created") observerOfString.on(.next("😉")) observerOfString.on(.completed) return Disposables.create() } .subscribe { event in print(event) } import CryptoSwift let data = Data(bytes: [0x01, 0x02, 0x03]) let bytes = data.bytes print(bytes) print(Array<UInt8>(hex: "0x010203")) print(bytes.toHexString()) print("123".md5())

Version:

swift-4.1-RELEASE

Output:

H(S^3; 𝐙) = { 0 : 𝐙, [v₀], 1 : 0, [], 2 : 0, [], 3 : 𝐙, [(v₀, v₁, v₂, v₃) + -(v₀, v₁, v₂, v₄) + (v₀, v₁, v₃, v₄) + -(v₀, v₂, v₃, v₄) + (v₁, v₂, v₃, v₄)] } Observable created next(😉) completed [1, 2, 3] [1, 2, 3] 010203 202cb962ac59075b964b07152d234b70

Error:

^ SwiftyMathに加えてRxSwiftとCryptoSwiftを足してみました。超簡単に追加できるようにしてあるので、追加したいものがあったらPRください。 https://github.com/kishikawakatsumi/swift-playground/blob/master/Libraries/All/Package.swift#L14-L22 ^ やり方は見たらわかります。

kishikawakatsumi/swift-playground

Contribute to swift-playground development by creating an account on GitHub.

4.1.1-RELEASE

DEVELOPMENT-2018-05-03-a

@swiftbot !install -l

swift-4.2-DEVELOPMENT-SNAPSHOT-2018-05-02-a swift-4.1.1-RELEASE swift-DEVELOPMENT-SNAPSHOT-2018-04-25-a swift-DEVELOPMENT-SNAPSHOT-2018-04-24-a swift-4.2-DEVELOPMENT-SNAPSHOT-2018-04-23-a swift-DEVELOPMENT-SNAPSHOT-2018-04-23-a swift-DEVELOPMENT-SNAPSHOT-2018-04-22-a swift-DEVELOPMENT-SNAPSHOT-2018-04-21-a swift-DEVELOPMENT-SNAPSHOT-2018-04-20-a swift-DEVELOPMENT-SNAPSHOT-2018-04-19-a ...

@norio_nomura DEVELOPMENT-2018-05-03-aっていうスナップショットはなんですか？

swift-tensorflowです

あ、なるほど。確かに名前をよく見たらそうですね

@swiftbot print(pow(2,5))

@cecil_ma 実行するにはコードをコードブロック (バックティック３つ)で囲います。 (edited)

3:38 PM

@swiftbot help

Usage: @swiftbot [--version=SWIFT_VERSION] [--command={swift, swiftc}] [--options=SWIFTC_OPTIONS] ``` [Swift Code] ``` Examples: @swiftbot ``` print("Hello world!") ``` @swiftbot --version=4.0.3 ``` print("Hello world!") ``` @swiftbot --command=swiftc --options=-dump-parse ``` print("Hello world!") ``` Subcommands: @swiftbot versions: show available Swift toolchain versions @swiftbot contribute: show repository URLs @swiftbot help: show help

@swiftbot print(pow(2,5))

1

kishikawakatsumi

print(pow(2,5))

Version:

swift-4.1.1-RELEASE

Output:

Error:

/usercode/main.swift:1:7: error: use of unresolved identifier 'pow' print(pow(2,5)) ^~~

@swiftbot import SwiftGlibc print(pow(2,5))

1

kishikawakatsumi

import SwiftGlibc print(pow(2,5))

Version:

swift-4.1.1-RELEASE

Output:

32.0

Error:

@swiftbot —version 4.0.3 print("hello")

1

kishikawakatsumi

print("hello")

Version:

swift-4.0.3-RELEASE

Output:

hello

Error:

^ そういえばSwiftはSmart Punctuationに対して特別なエラーメッセージを返してたなあと思って対応した。iPhoneから投稿しても平気になった。

1

なんかレスポンスかっこよくなってる

ちょっと試しでRichEmbedというのを使ってみました。１つのメッセージにできるので、編集等があった時の管理が簡単になりました。ただEmbedは25個/メッセージですけど1Embedが1000文字までなので返せるOutputは半分になるところがデメリットですね。

@swift-4.1.3

import Foundation var hint = addrinfo(), addrinfo0: UnsafeMutablePointer<addrinfo>? = nil #if _runtime(_ObjC) hint.ai_socktype = SOCK_STREAM #else hint.ai_socktype = Int32(SOCK_STREAM.rawValue) #endif let error = getaddrinfo("whois.nic.google", "nicname", &hint, &addrinfo0) guard error == 0 else { print(String.init(cString: gai_strerror(error))) exit(error) } defer { freeaddrinfo(addrinfo0) } var addrinfoNext = addrinfo0?.pointee while let addrinfo = addrinfoNext { defer { addrinfoNext = addrinfo.ai_next?.pointee } let sock = socket(addrinfo.ai_family, addrinfo.ai_socktype, addrinfo.ai_protocol) guard sock != -1, connect(sock, addrinfo.ai_addr, addrinfo.ai_addrlen) == 0 else { print(String(cString: strerror(errno))) continue } let handle = FileHandle(fileDescriptor: sock, closeOnDealloc: true) handle.write("xcode.app\r\n".data(using: .utf8)!) FileHandle.standardOutput.write(handle.readDataToEndOfFile()) }

(edited)

1

(edited)

norio_nomura

import Foundation var hint = addrinfo(), addrinfo0: UnsafeMutablePointer<addrinfo>? = nil #if _runtime(_ObjC) hint.ai_socktype = SOCK_STREAM #else hint.ai_socktype = Int32(SOCK_STREAM.rawValue) #endif let error = getaddrinfo("whois.iana.org", "nicname", &hint, &addrinfo0) guard error == 0 else { print(String.init(cString: gai_strerror(error))) exit(error) } defer { freeaddrinfo(addrinfo0) } var addrinfoNext = addrinfo0?.pointee while let addrinfo = addrinfoNext { defer { addrinfoNext = addrinfo.ai_next?.pointee } let sock = socket(addrinfo.ai_family, addrinfo.ai_socktype, addrinfo.ai_protocol) guard sock != -1, connect(sock, addrinfo.ai_addr, addrinfo.ai_addrlen) == 0 else { print(String(cString: strerror(errno))) continue } let handle = FileHandle(fileDescriptor: sock, closeOnDealloc: true) handle.write("xcode.app\r\n".data(using: .utf8)!) FileHandle.standardOutput.write(handle.readDataToEndOfFile()) }

Version:

swift-4.1.1-RELEASE

Output:

Temporary failure in name resolution

Error:

% IANA WHOIS server % for more information on IANA, visit http://www.iana.org % This query returned 1 object refer: whois.nic.google domain: APP organisation: Charleston Road Registry Inc. address: 1600 Amphitheatre Parkway Mountain View, CA 94043 address: United States contact: administrative name: Domains Policy and Compliance organisation: Google Inc. address: 601 N. 34th Street address: Seattle, WA 98103 address: United States phone: 1 202 642 2325 fax-no: 1 650 492 5631 e-mail: iana-contact@google.com contact: technical name: Richard Roberto organisation: Google Inc address: 76 9th Avenue, 4th Floor address: New York, NY 10011 address: United States phone: 1 212 565 2633 fax-no: 1 650 492 5631 e-mail: crr-tech@google.com nserver: NS-TLD1.CHARLESTONROADREGISTRY.COM 2001:4860:4802:32:0:0:0:69 216.239.32.105 nserver: NS-TLD2.CHARLESTONROADREGISTRY.COM 2001:4860:4802:34:0:0:0:69 216.239.34.105 nserver: NS-TLD3.CHARLESTONROADREGISTRY.COM 2001:4860:4802:36:0:0:0:69 216.239.36.105 nserver: NS-TLD4.CHARLESTONROADREGISTRY.COM 2001:4860:4802:38:0:0:0:69 216.239.38.105 nserver: NS-TLD5.CHARLESTONROADREGISTRY.COM 2001:4860:4805:0:0:0:0:69 216.239.60.105 ds-rdata: 41971 8 2 858FEEE8930855598DB109C9705955EDF494FA641ED1CDD07A95C13357E9FD19 ds-rdata: 23684 8 2 3a5cc8a31e02c94aba6461912fabb7e9f5e34957bb6114a55a864d96aec31836 whois: whois.nic.google status: ACTIVE remarks: Registration information: http://www.registry.google created: 2015-06-25 changed: 2018-03-20 source: IANA Network is unreachable

whois.iana.orgへの問い合わせは動くけど、whois.nic.googleへの問い合わせは動かないな。

@swift-4.1.3 print(3)

3

手元のREPLだとうまくいくのに＞whois.nic.google

@swift-4.1.3 print(3)

3

さっきのnorioさんの書き込みに両方のbotが反応したのはなぜだ

先に岸川さんのボットへ問い合わせて、その後、僕のボットへのメンションへ投稿を書き換えました。

あ、なるほど。

岸川さんのボットはネットワークアクセス遮断されてるのを忘れていたので。

2:08 AM

試行錯誤がしやすい様に、ボットも投稿の編集／削除に追従する様になっています。

2:09 AM

ボットにこれを出力させたかった。

Domain Name: xcode.app Registry Domain ID: 2C5582619-APP Registrar WHOIS Server: whois.nic.google Registrar URL: http://www.ascio.com Updated Date: 2018-04-05T15:45:23Z Creation Date: 2018-03-30T11:42:39Z Registry Expiry Date: 2019-03-30T11:42:39Z Registrar: Ascio Technologies, Inc. Registrar IANA ID: 106 Registrar Abuse Contact Email: abuse@ascio.com Registrar Abuse Contact Phone: +44.2070159370 Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited Registrant Organization: Apple Inc. Registrant State/Province: CA Registrant Country: US Name Server: a.ns.apple.com Name Server: b.ns.apple.com Name Server: c.ns.apple.com Name Server: d.ns.apple.com DNSSEC: unsigned

4.2-DEVELOPMENT-SNAPSHOT-2018-05-08-a

@swiftbot !install swift-DEVELOPMENT-SNAPSHOT-2018-05-08-a

Sending build context to Docker daemon 89.89MB Step 1/10 : FROM ubuntu:16.04 ---> f975c5035748 Step 2/10 : LABEL maintainer="Katsumi Kishikawa <kishikawakatsumi@mac.com>" ---> Running in 74672f4fa8d7 Removing intermediate container 74672f4fa8d7 ---> 59ef556a8cc5 Step 3/10 : LABEL Description="Docker Container for the Apple's Swift programming language" ---> Running in 5be2396d3584 Removing intermediate container 5be2396d3584 ---> cb7e4d4d82b3 Step 4/10 : RUN apt-get -q update && apt-get -q install -y make libc6-dev clang-3.8 curl libedit-dev libpython2.7 libicu-dev libssl-dev libxml2 tzdata git libcurl4-openssl-dev pkg-config && update-alternatives --quiet --install /usr/bin/clang clang /usr/bin/clang-3.8 100 && update-alternatives --quiet --install /usr/bin/clang++ clang++ /usr/bin/clang++-3.8 100 && rm -r /var/lib/apt/lists/* ---> Running in a914c461bbe6 Get:1 http://security.ubuntu.com/ubuntu xenial-security InRelease [107 kB] Get:2 http://archive.ubuntu.com/ubuntu xenial InRelease [247 kB] Get:3 http://security.ubuntu.com/ubuntu xenial-security/universe Sources [80.4 kB] Get:4 http://security.ubuntu.com/ubuntu xenial-security/main amd64 Packages [625 kB] Get:5 http://security.ubuntu.com/ubuntu xenial-security/restricted amd64 Packages [12.7 kB] Get:6 http://security.ubuntu.com/ubuntu xenial-security/universe amd64 Packages [438 kB] Get:7 http://security.ubuntu.com/ubuntu xenial-security/multiverse amd64 Packages [3759 B] Get:8 http://archive.ubuntu.com/ubuntu xenial-updates InRelease [109 kB] Get:9 http://archive.ubuntu.com/ubuntu xenial-backports InRelease [107 kB] Get:10 http://archive.ubuntu.com/ubuntu xenial/universe Sources [9802 kB] Get:11 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages [1558 kB] Get:12 http://archive.ubuntu.com/ubuntu xenial/restricted amd64 Packages [14.1 kB] ...

log.txt

64.19 KB

swift-4.2-branchとmasterでそれぞれスナップショットが出てますよ。 (edited)

ども。のむらさんは全部自動化されてます？

4:24 AM

@swiftbot !install -l

swift-DEVELOPMENT-SNAPSHOT-2018-05-08-a swift-4.2-DEVELOPMENT-SNAPSHOT-2018-05-08-a swift-4.2-DEVELOPMENT-SNAPSHOT-2018-05-02-a swift-4.1.1-RELEASE swift-DEVELOPMENT-SNAPSHOT-2018-04-25-a swift-DEVELOPMENT-SNAPSHOT-2018-04-24-a swift-4.2-DEVELOPMENT-SNAPSHOT-2018-04-23-a swift-DEVELOPMENT-SNAPSHOT-2018-04-23-a swift-DEVELOPMENT-SNAPSHOT-2018-04-22-a swift-DEVELOPMENT-SNAPSHOT-2018-04-21-a ...

@swiftbot !install swift-4.2-DEVELOPMENT-SNAPSHOT-2018-05-08-a

Sending build context to Docker daemon 89.89MB Step 1/10 : FROM ubuntu:16.04 ---> f975c5035748 Step 2/10 : LABEL maintainer="Katsumi Kishikawa <kishikawakatsumi@mac.com>" ---> Running in 6131c07eaec0 Removing intermediate container 6131c07eaec0 ---> 3be293815ff5 Step 3/10 : LABEL Description="Docker Container for the Apple's Swift programming language" ---> Running in f6ad39fa35f5 Removing intermediate container f6ad39fa35f5 ---> cfb1b891f8e9 Step 4/10 : RUN apt-get -q update && apt-get -q install -y make libc6-dev clang-3.8 curl libedit-dev libpython2.7 libicu-dev libssl-dev libxml2 tzdata git libcurl4-openssl-dev pkg-config && update-alternatives --quiet --install /usr/bin/clang clang /usr/bin/clang-3.8 100 && update-alternatives --quiet --install /usr/bin/clang++ clang++ /usr/bin/clang++-3.8 100 && rm -r /var/lib/apt/lists/* ---> Running in d1d8b173ba38 Get:1 http://archive.ubuntu.com/ubuntu xenial InRelease [247 kB] Get:2 http://archive.ubuntu.com/ubuntu xenial-updates InRelease [109 kB] Get:3 http://archive.ubuntu.com/ubuntu xenial-backports InRelease [107 kB] Get:4 http://archive.ubuntu.com/ubuntu xenial/universe Sources [9802 kB] Get:5 http://security.ubuntu.com/ubuntu xenial-security InRelease [107 kB] Get:6 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages [1558 kB] Get:7 http://archive.ubuntu.com/ubuntu xenial/restricted amd64 Packages [14.1 kB] Get:8 http://archive.ubuntu.com/ubuntu xenial/universe amd64 Packages [9827 kB] Get:9 http://archive.ubuntu.com/ubuntu xenial/multiverse amd64 Packages [176 kB] Get:10 http://archive.ubuntu.com/ubuntu xenial-updates/universe Sources [255 kB] Get:11 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages [1002 kB] Get:12 http://archive.ubuntu.com/ubuntu xenial-updates/restricted amd64 Packages [13.1 kB] ...

log.txt

64.19 KB

まだ自動化できていません。

7:51 AM

CircleCIのcronで自動化しようとして、まだ途中。

CIのスケジューリングでやるというのは良いアイデアですね。マネします。

Discordから命令するとパッケージ入るのか

私がメンションした場合に限り、ターミナルの操作とかができるようになっています。

8:28 AM

@swiftbot echo "hello"

8:29 AM

ダメだった。なんかバグがあるな。。。

おもしろいです

@swiftbot !echo "hello"

hello

^ ちゃんと動いてた。自分で作ったのに仕様を勘違いしていた。

@swiftbot !echo “hello”

11:42 AM

ちゃんと無視された

大丈夫だと思います。仮に操作できても大事には至らないはず。

-以降のオプションをCommandLine.argumentsで取れる様になりました。 @swift-4.1.3 -Onone - -arg1 value1 print(CommandLine.arguments)

["-", "-arg1", "value1"]

ボットとして使い道があるかどうか分かりませんが…

dockerイメージの自動更新をCircleCIのcronで実行する様にしました。 https://circleci.com/gh/norio-nomura/docker-swift

Continuous Integration and Deployment

Hosted Continuous Integration for web applications. Set up your application for testing in one click, on the fastest testing platform on the internet.

7:55 AM

CircleCIでgithub.com/apple/swiftのタグを取得 -> 既存のものより新しいものがあったら Dockerfile を生成してdockerビルドテスト -> ビルドOKなら新しいDockerfileをgithubへプッシュ -> Docker Hubで自動ビルドして公開

7:58 AM

あとは、Docker Hubで新しいswiftのdockerイメージが公開されたら、それを元にボットを自動更新したい…

@swift-4.1.3 @swift-4.2.4 @swift-main import Foundation print(ProcessInfo.processInfo.environment["SWIFT_VERSION"] ?? "") (edited)

4.2-DEVELOPMENT-SNAPSHOT-2018-05-10-a

DEVELOPMENT-2018-05-10-a

@swiftbot $install -l

swift-4.1-DEVELOPMENT-SNAPSHOT-2018-05-11-a swift-DEVELOPMENT-SNAPSHOT-2018-05-11-a swift-DEVELOPMENT-SNAPSHOT-2018-05-10-a swift-4.2-DEVELOPMENT-SNAPSHOT-2018-05-10-a swift-DEVELOPMENT-SNAPSHOT-2018-05-08-a swift-4.2-DEVELOPMENT-SNAPSHOT-2018-05-08-a swift-4.2-DEVELOPMENT-SNAPSHOT-2018-05-02-a swift-4.1.1-RELEASE swift-DEVELOPMENT-SNAPSHOT-2018-04-25-a swift-DEVELOPMENT-SNAPSHOT-2018-04-24-a ...

@swift-4.1.3

import Foundation protocol Operand: Numeric {} typealias Operator<Value: Operand> = (Value, Value) -> Value indirect enum Node<Value: Operand> { case v(Value) case op(Node<Value>, Operator<Value>, Node<Value>) func evaluate() -> Value { switch self { case .v(let value): return value case .op(let operand1, let `operator`, let operand2): return `operator`(operand1.evaluate(), operand2.evaluate()) } } } extension Int: Operand {} extension Node: ExpressibleByIntegerLiteral where Value == Int { typealias IntegerLiteralType = Int init(integerLiteral value: Value) { self = .v(value) } } let root: Node<Int> = .op(1, +, .op(2, *, 3)) print(root.evaluate())

(edited)

7 (edited)

@swiftbot import Foundation print(TimeZone(abbreviation: "JST"))

1

t.ae

import Foundation print(TimeZone(abbreviation: "JST"))

Version:

swift-4.1.1-RELEASE

Output:

Optional(Asia/Tokyo (fixed))

Error:

/usercode/main.swift:2:7: warning: expression implicitly coerced from 'TimeZone?' to Any print(TimeZone(abbreviation: "JST")) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /usercode/main.swift:2:7: note: provide a default value to avoid this warning print(TimeZone(abbreviation: "JST")) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ?? <#default value#> /usercode/main.swift:2:7: note: force-unwrap the value to avoid this warning print(TimeZone(abbreviation: "JST")) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ! /usercode/main.swift:2:7: note: explicitly cast to Any with 'as Any' to silence this warning print(TimeZone(abbreviation: "JST")) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ as Any

@swiftbot import Foundation import CoreFoundation print(CFTimeZoneCopyAbbreviationDictionary())

1

t.ae

import Foundation import CoreFoundation print(CFTimeZoneCopyAbbreviationDictionary())

Version:

swift-4.1.1-RELEASE

Output:

Error:

Fatal error: customMirror is not yet implemented: file Foundation/NSDictionary.swift, line 691 /usr/bin/swift[0x3f24d64] /usr/bin/swift[0x3f250a6] /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7fa9e279b390] /usr/lib/swift/linux/libswiftCore.so(+0x2baf79)[0x7fa9dd9d9f79] /usr/lib/swift/linux/libswiftCore.so(_T0s17_assertionFailures5NeverOs12StaticStringV_SSAE4fileSu4lines6UInt32V5flagstF+0x2c)[0x7fa9dd86c46c] /usr/lib/swift/linux/libFoundation.so(+0x50438f)[0x7fa9dc5b238f] /usr/lib/swift/linux/libFoundation.so(+0x50425a)[0x7fa9dc5b225a] /usr/lib/swift/linux/libFoundation.so(+0x41451b)[0x7fa9dc4c251b] /usr/lib/swift/linux/libswiftCore.so(+0x2f3af8)[0x7fa9dda12af8] /usr/lib/swift/linux/libswiftCore.so(+0x2f5221)[0x7fa9dda14221] /usr/lib/swift/linux/libswiftCore.so(+0x34d751)[0x7fa9dda6c751] /usr/lib/swift/linux/libswiftCore.so(+0x34e72e)[0x7fa9dda6d72e] /usr/lib/swift/linux/libswiftCore.so(+0x21ee99)[0x7fa9dd93de99] ...

3:39 AM

stderr-4.1.1.txt

1.47 KB

@swiftbot

import Foundation let date = Date() let timeZone = TimeZone(secondsFromGMT: 0)! let cal = Calendar(identifier: .gregorian) let comp = cal.dateComponents(in: timeZone, from: date) print(comp.second) print(comp.nanosecond)

1

t.ae

import Foundation let date = Date() let timeZone = TimeZone(secondsFromGMT: 0)! let cal = Calendar(identifier: .gregorian) let comp = cal.dateComponents(in: timeZone, from: date) print(comp.second) print(comp.nanosecond)

Version:

swift-4.1.1-RELEASE

Output:

Optional(14) nil

Error:

/usercode/main.swift:7:7: warning: expression implicitly coerced from 'Int?' to Any print(comp.second) ^~~~~~~~~~~ /usercode/main.swift:7:12: note: provide a default value to avoid this warning print(comp.second) ~~~~~^~~~~~ ?? <#default value#> /usercode/main.swift:7:12: note: force-unwrap the value to avoid this warning print(comp.second) ~~~~~^~~~~~ ! /usercode/main.swift:7:12: note: explicitly cast to Any with 'as Any' to silence this warning print(comp.second) ~~~~~^~~~~~ as Any /usercode/main.swift:8:7: warning: expression implicitly coerced from 'Int?' to Any print(comp.nanosecond) ^~~~~~~~~~~~~~~ /usercode/main.swift:8:12: note: provide a default value to avoid this warning print(comp.nanosecond) ~~~~~^~~~~~~~~~ ?? <#default value#> /usercode/main.swift:8:12: note: force-unwrap the value to avoid this warning print(comp.nanosecond) ~~~~~^~~~~~~~~~ ...

3:56 AM

stderr-4.1.1.txt

1.15 KB

@swiftbot

import Foundation import RxSwift class Hoge: NSObject {} extension Reactive where Base == Hoge { class Piyo {} var hoge: Observable<Int> { return Observable.create { observer in var piyo = Piyo() observer.onNext(42) return Disposables.create {} } } } let hoge = Hoge() hoge.rx.hoge.subscribe(onNext: { res in print(res) })

(edited)

1

(edited)

Biacco42

import Foundation import RxSwift class Hoge: NSObject {} extension Reactive where Base == Hoge { class Piyo {} var hoge: Observable<Int> { return Observable.create { observer in var piyo = Piyo() observer.onNext(42) return Disposables.create {} } } } let hoge = Hoge() hoge.rx.hoge.subscribe(onNext: { res in print(res) })

Version:

swift-4.1.1-RELEASE

Output:

42

Error:

/usercode/main.swift:10:17: warning: initialization of variable 'piyo' was never used; consider replacing with assignment to '_' or removing it var piyo = Piyo() ~~~~^~~~ _ /usercode/main.swift:19:14: warning: result of call to 'subscribe(onNext:onError:onCompleted:onDisposed:)' is unused hoge.rx.hoge.subscribe(onNext: { res in ^ ~~~~~~~~~~~~~~~~~

@swiftbot --help

10:26 AM

@swiftbot help

Usage: @swiftbot [--version=SWIFT_VERSION] [--command={swift, swiftc}] [--options=SWIFTC_OPTIONS] ``` [Swift Code] ``` Examples: @swiftbot ``` print("Hello world!") ``` @swiftbot --version=4.0.3 ``` print("Hello world!") ``` @swiftbot --command=swiftc --options=-dump-parse ``` print("Hello world!") ``` Subcommands: @swiftbot versions: show available Swift toolchain versions @swiftbot contribute: show repository URLs @swiftbot help: show help

@swiftbot contribute

Kishikawa Katsumi

Contributions Welcome!

All contributions (no matter if small) are always welcome.

Questions/Help

@kishikawakatsumi ...

Reporting Bugs/Requesting Features

https://github.com/kishikawakatsumi/swift-playground https://github.com/kishikawakatsumi/swift-compiler-discord-bot

Donations

https://www.paypal.me/kishikawakatsumi

@swiftbot import RxSwift

1

omochimetaru

import RxSwift

Version:

swift-4.1.1-RELEASE

Output:

Error:

@swiftbot versions

2018-05-08-a 2018-05-02-a 2018-04-25-a 2018-04-23-a 4.1.1 4.1 4.0.3 4.0.2 4.0 3.1.1 3.1 3.0.2 3.0.1

@swiftbot --version=4.1,4.0.3,3.1.1,3.0.2 import RxSwift

1

omochimetaru

import RxSwift

Version:

swift-4.1-RELEASE

Output:

Error:

/usercode/main.swift:1:8: error: no such module 'RxSwift' import RxSwift ^

Version:

swift-4.0.3-RELEASE

Output:

Error:

/usercode/main.swift:1:8: error: no such module 'RxSwift' import RxSwift ^

Version:

swift-3.1.1-RELEASE

Output:

Error:

/usercode/main.swift:1:8: error: no such module 'RxSwift' import RxSwift ^

Version:

swift-3.0.2-RELEASE

Output:

Error:

/usercode/main.swift:1:8: error: no such module 'RxSwift' import RxSwift ^

バージョン違いで壊れるのデモしたかったけどできなかた

外部フレームワークは特定のバージョンにしか入れてないんですよね。予定はあってやり方も頭の中にはあるんですけど。

11:22 AM

特に過去のバージョンにリンクさせるにはまずSwift 3.xで動くバージョンはどれなのかというところをやらないといけないのでそれが面倒に思っています。Snapshotで動かすのは最新のリリースかmasterでいいと思うんですけど。

今考えてるのは https://github.com/kishikawakatsumi/swift-playground/tree/master/Libraries/All ^ ここを4.1.1/Libraries/*、 3.0.2/Libraries/* ... のようにディレクトリでバージョニングして、それぞれのPackage.swiftでそのバージョンで使うライブラリを指定するって感じに改修ですね。そうすると使う方（Botのプログラム）で -L ${SWIFT_VERSION}/Libraries/All のように切り替えられるのでうまくいくと思うんでなんだったらPRしてくれると

です (edited)

kishikawakatsumi/swift-playground

Contribute to swift-playground development by creating an account on GitHub.

1

4.2-DEVELOPMENT-SNAPSHOT-2018-05-14-a

@swiftbot --version=4.1,4.0,3.1.1

import Foundation protocol EnumCollection: Hashable { static var all: [Self] { get } } extension EnumCollection { static func cases() -> AnySequence<Self> { typealias SelfType = Self return AnySequence { () -> AnyIterator<SelfType> in var raw = 0 return AnyIterator { let current: Self = withUnsafePointer(to: &raw) { $0.withMemoryRebound(to: SelfType.self, capacity: 1) { $0.pointee } } guard current.hashValue == raw else { return nil } raw += 1 return current } } } static var all: [Self] { return Array(self.cases()) } } enum SampleEnum: String, EnumCollection { case hoge = "hoge" case foo case bar = "BAR" } print(SampleEnum.all)

(edited)

1

(edited)

noppe

import Foundation protocol EnumCollection: Hashable { static var all: [Self] { get } } extension EnumCollection { static func cases() -> AnySequence<Self> { typealias SelfType = Self return AnySequence { () -> AnyIterator<SelfType> in var raw = 0 return AnyIterator { let current: Self = withUnsafePointer(to: &raw) { $0.withMemoryRebound(to: SelfType.self, capacity: 1) { $0.pointee } } guard current.hashValue == raw else { return nil } raw += 1 return current } } } static var all: [Self] { return Array(self.cases()) } } enum SampleEnum: String, EnumCollection { case hoge = "hoge" case foo case bar = "BAR" } print(SampleEnum.all)

Version:

swift-4.1-RELEASE

Output:

[main.SampleEnum.hoge, main.SampleEnum.foo, main.SampleEnum.bar]

Error:

Version:

swift-4.0-RELEASE

Output:

[main.SampleEnum.hoge, main.SampleEnum.foo, main.SampleEnum.bar]

Error:

Version:

swift-3.1.1-RELEASE

Output:

[main.SampleEnum.hoge, main.SampleEnum.foo, main.SampleEnum.bar]

Error:

DEVELOPMENT-SNAPSHOT-2018-05-17-a

4.1-DEVELOPMENT-SNAPSHOT-2018-05-17-a

4.2-DEVELOPMENT-SNAPSHOT-2018-05-14-a

スナップショットのDockerイメージ作成からDiscordボットの更新まで自動化出来た。

1:35 AM

tensorflowを除いて。

@swift-main -v (edited)

stderr:

Swift version 4.2-dev (LLVM c30b3a99bf, Clang 1bc45fa980, Swift e96fcee6cd) Target: x86_64-unknown-linux-gnu /usr/bin/lldb --repl=-disable-objc-interop error: failed to launch REPL process: process launch failed: 'A' packet returned an error: 8

(edited)

@swift-main @swift-4.2.4 -version (edited)

Swift version 4.2-dev (LLVM c30b3a99bf, Clang 1bc45fa980, Swift e96fcee6cd) Target: x86_64-unknown-linux-gnu (edited)

Swift version 4.2-dev (LLVM ae60dc0632, Clang 91ee593a0d, Swift f58f5286fd) Target: x86_64-unknown-linux-gnu

nightlyはmasterブランチから来てます。

1:56 AM

今のswift41はスナップショットになってます。

1:56 AM

@swift-4.1.3 --version

Swift version 4.1.2-dev (LLVM 1a7347a5f0, Clang cd84be6c42, Swift 0b46ecacfe) Target: x86_64-unknown-linux-gnu

@swift-tensorflow format --help

exit status: 1 with stdout:

OVERVIEW: Swift Format Tool USAGE: swift [options] <inputs> DEBUG/DEVELOPMENT OPTIONS: -driver-always-rebuild-dependents Always rebuild dependents of files that have been modified -driver-batch-seed <value> Use the given seed value to randomize batch-mode partitions -driver-print-actions Dump list of actions to perform -driver-print-bindings Dump list of job inputs and outputs -driver-print-derived-output-file-map Dump the contents of the derived output file map -driver-print-jobs Dump list of jobs to execute -driver-print-output-file-map Dump the contents of the output file map -driver-show-incremental With -v, dump information about why files are being rebuilt -driver-show-job-lifecycle Show every step in the lifecycle of driver jobs -driver-skip-execution Skip execution of subtasks when performing compilation -driver-use-filelists Pass input files as filelists whenever possible -driver-use-frontend-path <value> Use the given executable to perform compilations MODES: -dump-ast Parse and type-check input file(s) and dump AST(s) -dump-interface-hash Parse input file(s) and dump interface token hash(es) -dump-parse Parse input file(s) and dump AST(s) -dump-scope-maps <expanded-or-list-of-line:column> Parse and type-check input file(s) and dump the scope map(s) -dump-type-refinement-contexts Type-check input file(s) and dump type refinement contexts(s) -emit-assembly Emit assembly file(s) (-S) -emit-bc Emit LLVM BC file(s) -emit-executable Emit a linked executable -emit-imported-modules Emit a list of the imported modules -emit-ir Emit LLVM IR file(s) -emit-library Emit a linked libra

stdout.txt

https://file.io/rTJgqN

swift-tensorflowにはgoogleのswift-formatが入ってるぽい？ (edited)

3:15 AM

@swift-main format --help

OVERVIEW: Swift Format Tool USAGE: swift [options] <inputs> OPTIONS: -help Display available options -in-place Overwrite input file with formatted file. -indent-switch-case Indent cases in switch statements. -indent-width <n> Number of characters to indent. -line-range <n:n> <start line>:<end line>. Formats a range of lines (1-based). Can only be used with one input file. -o <file> Write output to <file> -tab-width <n> Width of tab character. -use-tabs Use tabs for indentation.

@swift-4.2.4 for _ in 0..<10 { print(Int.random(in: 0..<10)) }

6 9 3 1 5 3 2 9 4 5

Vapor3をインポートできる様になりました。 @swift-4.1.3

import Vapor let app = try Application() let client = try app.make(Client.self) let response = try client.get("http://www.apple.com/").wait() print(response.http.status)

ok

Vapor3が依存するSwiftNIOも。 @swift-4.1.3

import NIO struct E: Error {} let eventLoop = EmbeddedEventLoop() let promises: [EventLoopPromise<Void>] = (0..<100).map { (_: Int) in eventLoop.newPromise() } let futures = promises.map { $0.futureResult } let fN: EventLoopFuture<Void> = EventLoopFuture<Void>.andAll(futures, eventLoop: eventLoop) _ = promises.map { $0.fail(error: E()) } do { () = try fN.wait() print("should've thrown an error") } catch _ as E { print("good") } catch let e { print("error of wrong type \(e)") }

good

Cのソースを含むパッケージをビルドしておいてインポートする場合、SwiftPM(llbuild)がモジュールをビルドする際にswiftcへ渡すオプションを.build/debug.yamlから取り出して、それを渡すと良い。 https://github.com/norio-nomura/SwiftCompilerDiscordappBot/blob/8962b0dec3723876b2ac8a105653fce8567025eb/Sources/SwiftCompilerDiscordappBot/App.swift#L201-L207 (edited)

norio-nomura/SwiftCompilerDiscordappBot

SwiftCompilerDiscordappBot - Swift Compiler Discordapp Bot

@swiftbot --version=4.0,3.1.1 class A { init(a: A) { } } class B: A { init() { super.init(a: self) } }

おや？

ステータスがグレーだ

@swift-main @swift-4.0.3 class A { init(a: A) { } } class B: A { init() { super.init(a: self) } }

exit status: 1 with stderr:<stdin>:8:23: error: 'self' used before super.init call super.init(a: self) ^

stderr:<stdin>:8:15: error: 'self' used before 'super.init' call super.init(a: self) ^

3系だと渡せるん？

swift3だと通りますこれ

10:09 AM

webは生きてた

どっかで話題を見たような気もする Bにstored propery作ってB.initの中で渡されたAのそれを触ると死にそう

10:12 AM

あいや、ちがうな、それは変だ

10:15 AM

class A { init(a: B) {} } class B: A { var s: String init() { self.s = "aaa" super.init(a: self) } }

10:16 AM

0. Program arguments: /usr/bin/swift -frontend -interpret /usercode/main.swift -disable-objc-interop -module-name main 1. While running pass #34 SILFunctionTransform "Definite Initialization" on SILFunction "@_TFC4main1BcfT_S0_". Aborted (core dumped)

class A { let hoge: C init(a: B) { a.foo() self.hoge = .init() } } class C {} class B: A { init() { super.init(a: self) } func foo() { print(self.hoge) } } B.init().foo()

壊した！

@swiftbot

2:36 PM

Botだけ落ちてる？死活監視はWebしか入れてないから気づかなかったのか。

2:38 PM

@swiftbot

Usage: @swiftbot [--version=SWIFT_VERSION] [--command={swift, swiftc}] [--options=SWIFTC_OPTIONS] ``` [Swift Code] ``` Examples: @swiftbot ``` print("Hello world!") ``` @swiftbot --version=4.0.3 ``` print("Hello world!") ``` @swiftbot --command=swiftc --options=-dump-parse ``` print("Hello world!") ``` Subcommands: @swiftbot versions: show available Swift toolchain versions @swiftbot contribute: show repository URLs @swiftbot help: show help

DigitalOceanのメンテナンスは関係あるかな。Webと一緒のホストだからWebだけ生きてるということはこちら側の問題だと思うけど。

そういえば少し前に、僕のbotもいくつか勝手にオフラインになってたかも。手動で再起動した気がする。

Botの死活監視は良い方法ありますかね。

2:53 AM

Swiftイメージのアップデートを自動化したらそれでわかるか。

ボット関連の通知(DockerHubへのpush, Herokuのbuild)は、webhook経由で管理用Discordチャンネルへ投稿して、それをiOSのプッシュ通知で受け取ってる。

3:13 AM

ボットがオフラインになったかどうか？の監視は、ボットを監視するボットを作って、それにメールを送らせるとかさせれば良いのかな。

3:16 AM

https://discordbots.org/bot/395012672472612864

Watchman

Need a Bot to monitor the status of your server Bots and notify you if any Bots go offline? Try WatchBot... I mean Watchman (Bot)

あるんだ。これを入れたら我々のbotを全部監視してもらえるかな？

それのソースコードを探したけど、見つけられないな… https://github.com/Anu6is?tab=repositories (edited)

Anu6is

Anu6is has 17 repositories available. Follow their code on GitHub.

私のBotとのむらさんのBotで監視しあうという手もあるかな。DMで反応を確認するとかでいいんじゃないか。

そうね。

ではそういう内容のPRを近々送るかも（送らないかも）

面白いｗ

このイベントをチェックすれば良いのかな。 https://discordapp.com/developers/docs/topics/gateway#presence-update

Discord API Docs for Bots and Developers

Integrate your service with Discord - whether it's a bot or a game or your whatever you wildest imagination can come up with.

3:36 AM

特定のユーザーが特定の時間オフラインだったら通知する。

3:36 AM

作るか。

通知はメールじゃなくてwebhooksがいいかな？

Webhookを使えば再起動を自動化できるかな。

む、とりあえず、ボット自身がオフライン継続してることを検知したら、iftttの https://ifttt.com/maker_webhooks を呼ぶ様にしようかと。 (edited)

IFTTT

Connect Webhooks to IFTTT, Email, maker_webhooks and more.

3:56 AM

あいや、通知目的ならDiscordチャンネルへの投稿webhooksを呼んだ方が良いかも。

3:57 AM

再起動自動化はどうなんだろう？

4:01 AM

通知はやっぱり別サービスであるiftttのwebhooksにするか。 (edited)

4:06 AM

iftttのアプレット使えば、herokuの再起動とかも出来そう。

@swift-4.2.4 var a = Random.default var b = a print(a.next()) print(b.next())

2190522142258413190 6214093798825593358

1

@swift-4.2.4

struct LinearCongruentialGenerator : RandomNumberGenerator { private var seed: UInt64 init(seed: UInt64 = 0) { self.seed = seed } mutating func next() -> UInt64 { seed = 6364136223846793005 &* seed &+ 1442695040888963407 return seed } } var a = LinearCongruentialGenerator() var b = a print(a.next()) print(b.next())

1442695040888963407 1442695040888963407

@swiftbot --version=4.0.3 struct A<T1, T2> {} typealias B<T> = A<Int, T> typealias D = A<Int, Int> protocol C {} extension B: C {}

1

kateinoigakukun

struct A<T1, T2> {} typealias B<T> = A<Int, T> typealias D = A<Int, Int> protocol C {} extension B: C {}

Version:

swift-4.0.3-RELEASE

Output:

Error:

これ、Swift4.1以前からCond confが使えてませんか？？

9:32 AM

@swiftbot --version=4.0.3 struct A<T1, T2> {} typealias B<T> = A<Int, T> typealias D = A<Int, Int> protocol C {} extension A: C where T1 == Int {}

1

kateinoigakukun

struct A<T1, T2> {} typealias B<T> = A<Int, T> typealias D = A<Int, Int> protocol C {} extension A: C where T1 == Int {}

Version:

swift-4.0.3-RELEASE

Output:

Error:

/usercode/main.swift:7:1: error: extension of type 'A' with constraints cannot have an inheritance clause extension A: C where T1 == Int {} ^ ~

これが通らないのに上が通るのおかしい気がする

typealiasのextensionは壊れてるのがしばしば話題に上がってた気がする

9:34 AM

condconfが出来るように一見見えるが、その実conditionalじゃないやつも拡張されてるし、なんなら壊れてる、みたいな感じです (edited)

ヤバですね

9:39 AM

cond confが無い世界で書いてたはずなのに、extension Single: HogeProtocol {} が書けてしまったので。。。

ぶっ壊れてそう

swift-tensorflow以外はVaporを使える様になりました。 @swift-4.1.3 @swift-4.2.4 @swift-main

import Vapor let app = try Application() let client = try app.make(Client.self) let response = try client.get("http://www.apple.com/").wait() print(response.http.status)

ok

@swiftbot --versions

むむ

ボットさん、おねむ

Webは死活監視を入れてて、間違いなくずっと生きていて、Botは少なくともこの何日かは使われてなかったわけなので（DMで使われてたらわからないけど）クラッシュしてるとかじゃないと思うんですよね。しばらく使ってなかったらInactiveになるとか何か見逃している設定があるのだろうか。

5:58 AM

@swiftbot

Usage: @swiftbot [--version=SWIFT_VERSION] [--command={swift, swiftc}] [--options=SWIFTC_OPTIONS] ``` [Swift Code] ``` Examples: @swiftbot ``` print("Hello world!") ``` @swiftbot --version=4.0.3 ``` print("Hello world!") ``` @swiftbot --command=swiftc --options=-dump-parse ``` print("Hello world!") ``` Subcommands: @swiftbot versions: show available Swift toolchain versions @swiftbot contribute: show repository URLs @swiftbot help: show help

何もしてないけど起きた。

5:58 AM

@swiftbot $install -l

swift-4.2-DEVELOPMENT-SNAPSHOT-2018-05-29-a swift-4.1-DEVELOPMENT-SNAPSHOT-2018-05-29-a swift-DEVELOPMENT-SNAPSHOT-2018-05-29-a swift-4.2-DEVELOPMENT-SNAPSHOT-2018-05-28-a swift-4.1-DEVELOPMENT-SNAPSHOT-2018-05-28-a swift-DEVELOPMENT-SNAPSHOT-2018-05-28-a swift-4.2-DEVELOPMENT-SNAPSHOT-2018-05-27-a swift-4.1-DEVELOPMENT-SNAPSHOT-2018-05-27-a swift-DEVELOPMENT-SNAPSHOT-2018-05-27-a swift-4.2-DEVELOPMENT-SNAPSHOT-2018-05-26-a ...

2018-05-29のスナップショットはまだ入ってないので入れます。とりあえずswift-4.2-DEVELOPMENT-SNAPSHOT-2018-05-29-aでいいんですかね？

5:59 AM

実はDEVELOPMENT-SNAPSHOT-2018-05-29-aしか見てないので、同じ日付のうち、どれか１つしか入りません。

ふむふむ

6:02 AM

そうですね、 BundleID が org.swift.4220180529a なのでswift-4.2-DEVELOPMENT-SNAPSHOT-2018-05-29-aであってそうです

@swiftbot versions

2018-05-08-a 2018-05-02-a 2018-04-25-a 2018-04-23-a 4.1.1 4.1 4.0.3 4.0.2 4.0 3.1.1 3.1 3.0.2 3.0.1

あ、さっきのはBotが寝ていたのではなくて、パラメータが違います、です。

あなるほど

勝手に眠るとかじゃなくてよかった。

6:04 AM

@swiftbot $install swift-4.2-DEVELOPMENT-SNAPSHOT-2018-05-29-a

install: missing destination file operand after 'swift-4.2-DEVELOPMENT-SNAPSHOT-2018-05-29-a' Try 'install --help' for more information.

@swiftbot !install swift-4.2-DEVELOPMENT-SNAPSHOT-2018-05-29-a

6:06 AM

Botを介してシェルを叩くのは万能感が味わえて楽しいんだけど、さっさと自動化すべきですね。

Sending build context to Docker daemon 89.91MB Step 1/10 : FROM ubuntu:16.04 ---> f975c5035748 Step 2/10 : LABEL maintainer="Katsumi Kishikawa <kishikawakatsumi@mac.com>" ---> Running in a69bfb9db1ab Removing intermediate container a69bfb9db1ab ---> 5ccd5d03a5fe Step 3/10 : LABEL Description="Docker Container for the Apple's Swift programming language" ---> Running in 21f3976de53e Removing intermediate container 21f3976de53e ---> 91e0694f254e Step 4/10 : RUN apt-get -q update && apt-get -q install -y make libc6-dev clang-3.8 curl libedit-dev libpython2.7 libicu-dev libssl-dev libxml2 tzdata git libcurl4-openssl-dev pkg-config && update-alternatives --quiet --install /usr/bin/clang clang /usr/bin/clang-3.8 100 && update-alternatives --quiet --install /usr/bin/clang++ clang++ /usr/bin/clang++-3.8 100 && rm -r /var/lib/apt/lists/* ---> Running in 0599cc52794a Get:1 http://security.ubuntu.com/ubuntu xenial-security InRelease [107 kB] Get:2 http://archive.ubuntu.com/ubuntu xenial InRelease [247 kB] Get:3 http://security.ubuntu.com/ubuntu xenial-security/universe Sources [80.9 kB] Get:4 http://security.ubuntu.com/ubuntu xenial-security/main amd64 Packages [637 kB] Get:5 http://security.ubuntu.com/ubuntu xenial-security/restricted amd64 Packages [12.7 kB] Get:6 http://security.ubuntu.com/ubuntu xenial-security/universe amd64 Packages [444 kB] Get:7 http://security.ubuntu.com/ubuntu xenial-security/multiverse amd64 Packages [3743 B] Get:8 http://archive.ubuntu.com/ubuntu xenial-updates InRelease [109 kB] Get:9 http://archive.ubuntu.com/ubuntu xenial-backports InRelease [107 kB] Get:10 http://archive.ubuntu.com/ubuntu xenial/universe Sources [9802 kB] Get:11 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages [1558 kB] Get:12 http://archive.ubuntu.com/ubuntu xenial/restricted amd64 Packages [14.1 kB] ...

log.txt

64.19 KB

@swiftbot versions

2018-05-29-a 2018-05-08-a 2018-05-02-a 2018-04-25-a 2018-04-23-a 4.1.1 4.1 4.0.3 4.0.2 4.0 3.1.1 3.1 3.0.2 3.0.1

お

@omochimetaru はいりました

@swiftbot --version=2018-05-29-a,4.1.1

protocol P0 { init(string: String) } class Animal { init() {} convenience init(string: String) { self.init() } var str1: String = "" } final class Cat : Animal, P0 { var str2: String = "" } func createP0<X: P0>() -> X { return X.init(string: "apple") } let cat: Cat = createP0() print(cat)

1

omochimetaru

protocol P0 { init(string: String) } class Animal { init() {} convenience init(string: String) { self.init() } var str1: String = "" } final class Cat : Animal, P0 { var str2: String = "" } func createP0<X: P0>() -> X { return X.init(string: "apple") } let cat: Cat = createP0() print(cat)

Version:

swift-4.2-DEVELOPMENT-SNAPSHOT-2018-05-29-a

Output:

Error:

swift: /home/buildnode/jenkins/workspace/oss-swift-4.2-package-linux-ubuntu-16_04/swift/lib/IRGen/MetadataLayout.h:208: const swift::irgen::ClassMetadataLayout::StoredMethodInfo &swift::irgen::ClassMetadataLayout::getStoredMethodInfo(swift::SILDeclRef) const: Assertion `it != MethodInfos.end()' failed. /usr/bin/swift[0x40fb264] /usr/bin/swift[0x40f90f2] /usr/bin/swift[0x40fb412] /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7f549b0bc390] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0x38)[0x7f54997fb428] /lib/x86_64-linux-gnu/libc.so.6(abort+0x16a)[0x7f54997fd02a] /lib/x86_64-linux-gnu/libc.so.6(+0x2dbd7)[0x7f54997f3bd7] /lib/x86_64-linux-gnu/libc.so.6(+0x2dc82)[0x7f54997f3c82] /usr/bin/swift[0x625c26] /usr/bin/swift[0x685385] /usr/bin/swift[0x68579b] /usr/bin/swift[0x5f20f5] /usr/bin/swift[0x5e41c8] /usr/bin/swift[0x5e216e] /usr/bin/swift[0x505bcb] /usr/bin/swift[0x5bc277] /usr/bin/swift[0x5baa10] /usr/bin/swift[0x4f6c37] /usr/bin/swift[0x4ddb8b] /usr/bin/swift[0x4d8eb1] ...

Version:

swift-4.1.1-RELEASE

Output:

main.Cat

Error:

6:11 AM

stderr-2018-05-29-a.txt

1.36 KB

確認できた〜ｗ

6:12 AM

0529でコンパイラクラッシュ、4.1.1リリースは大丈夫。

僕のbotは自動更新されてます。

@swift-main --version (edited)

Swift version 4.2-dev (LLVM 6a6f279fed, Clang 8c9b467e0e, Swift 1a317f4712) Target: x86_64-unknown-linux-gnu (edited)

プレイ中のゲームか

7:11 AM

右ペインの幅が足りなくて見切れてるけど右クリックしたら見れた

7:12 AM

シングルクリックでもよいか

botのロール？あったら見やすくないですか？

てかいまさらだけど僕が落としたのは https://swift.org/builds/development/xcode/swift-DEVELOPMENT-SNAPSHOT-2018-05-29-a/swift-DEVELOPMENT-SNAPSHOT-2018-05-29-a-osx.pkg で https://swift.org/builds/swift-4.2-branch/xcode/swift-4.2-DEVELOPMENT-SNAPSHOT-2018-05-29-a/swift-4.2-DEVELOPMENT-SNAPSHOT-2018-05-29-a-osx.pkg じゃなかったわ。。

7:13 AM

@t.ae 右でbotだけまとめるってこと？

adminのしたあたりにまとまってたらみやすいかなと

たしかに。システム側でついてる [BOT] とは別で二重になっちゃうけど

7:16 AM

やってみた

2

きしかわさんのbotが漏れてる

aaa

7:17 AM

OK

Discord 再起動したら過去の bot の発言も緑になった。

7:24 AM

どうせなら Swift オレンジでもいいかも。↓のオレンジ。 https://swift.org/assets/images/swift.svg

swiftのbotとは限らないかなと思って。

#EF5138 らしい。

7:24 AM

swift-developers-japan の bot だしいいのでは。 (edited)

やってみた

1

いろいろ機能があるんですね。

7:32 AM

ユーザーごとにミュートしたりできるのか。

ボイスチャットでうるさい人を個人的にミュートしたりできるやつですね

それは合理的ですね。

せっかくやってもらったけど、オレンジは輝度が低すぎてダークテーマだと少し読みづらい？他の人が特に気にならないようなら僕は問題ないですが。

MacHostのBotあったら便利かな。ここで使われるくらいの頻度なら家に余ってるMacBookProで動かしても良さそう。

うーん、便利か便利でないかで言えばあれば便利だとは思いますが、 Mac は基本的に手元で試せますし、 Bot に実行させたいのは Linux との挙動の違いを動かして共有したい場合くらいなので、なくても（さっきみたいに）結果貼れば十分なような気もします。

手元環境は人によって違うのが微妙で、信頼できる再現結果としてもbotが便利で、その点Linuxしか無いのは不便なので、自分はあったらとても嬉しい。

@swift-4.1.3 -version

Swift version 4.1.2 (swift-4.1.2-RELEASE) Target: x86_64-unknown-linux-gnu

SwiftBacktraceをインポートできる様にしました。 @swift-4.1.3

import Foundation import SwiftBacktrace handle(signal: SIGABRT) { signo in fputs(backtrace().joined(separator: "\n") + "\nsignal: \(signo)", stderr) fflush(stderr) } abort()

exit status: 134 with stderr:

/Libraries/.build/x86_64-unknown-linux/debug/libLibraries.so(callStackSymbols<A>(_:transform:)+0x87) [0x00007f899fa2d567] /Libraries/.build/x86_64-unknown-linux/debug/libLibraries.so(backtrace(_:formatter:)+0xd8) [0x00007f899fa2ce98] -(+0x0) [0x00007f89a790d175] -(+0x0) [0x00007f89a790d410] /lib/x86_64-linux-gnu/libpthread.so.0(__restore_rt+0x0) [0x00007f89a74dd390] -(+0x0) [0x00007ffdd962fcb0] signal: 6

@swift-4.2.4

do { class A { let title: String init(title: String) { self.title = title } } let a1 = A(title: "Hello") print(a1.title) }

Hello

@swiftbot --latest

do { class A { let title: String init(title: String) { self.title = title } } let a1 = A(title: "Hello") print(a1.title) }

1

Ohta

do { class A { let title: String init(title: String) { self.title = title } } let a1 = A(title: "Hello") print(a1.title) }

Version:

swift-4.1.1-RELEASE

Output:

Hello

Error:

@swift-main

do { class A { let title: String init(title: String) { self.title = title } } let a1 = A(title: "Hello") print(a1.title) }

Hello

（ふむ。。4.2で問題なく実行されますね。Xcode 10.0 beta の Playground だと class Aを init()したところで error: Execution was interrupted, reason: EXC_BAD_ACCESS (code=EXC_I386_GPFLT). になります

）

Xcode 10 beta 1添付のSwift 4.2でもREPLだと動くので、Xcode 10 beta 1のPlaygroundに問題があるみたいですね。

1

ほんとだ。REPLだと問題なく実行されますね。ありがとうございます

Welcome to Apple Swift version 4.2 (swiftlang-1000.0.16.4 clang-1000.0.25.3). (edited)

@swiftbot --version=2018-06-18-a,4.1.1 protocol A { associatedtype C = B } struct B {} struct D<T>: A {} extension D where T: A { typealias C = T.C }

1

kateinoigakukun

protocol A { associatedtype C = B } struct B {} struct D<T>: A {} extension D where T: A { typealias C = T.C }

Version:

⚠️ 2018-06-18-a

Error:

Swift '2018-06-18-a' toolchain is not supported.

Version:

swift-4.1.1-RELEASE

Output:

Error:

Can't demangle: _T0Xe1C4main1APqaMa /usr/bin/swift[0x3f24d64] /usr/bin/swift[0x3f250a6] /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7f80fc8ab390] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0x38)[0x7f80fafea428] /lib/x86_64-linux-gnu/libc.so.6(abort+0x16a)[0x7f80fafec02a] /usr/bin/swift[0x1752665] /usr/bin/swift[0x17522cf] /usr/bin/swift[0x5f6e5f] /usr/bin/swift[0x5f6527] /usr/bin/swift[0x5f5a18] /usr/bin/swift[0x4e7e2c] /usr/bin/swift[0x4ec855] /usr/bin/swift[0x55017e] /usr/bin/swift[0x53dc74] /usr/bin/swift[0x5783d4] /usr/bin/swift[0x577cbd] /usr/bin/swift[0x56e18d] /usr/bin/swift[0x4e5c60] /usr/bin/swift[0x5ad73f] /usr/bin/swift[0x5abf9d] /usr/bin/swift[0x4d878b] /usr/bin/swift[0x4c35d3] /usr/bin/swift[0x4beecc] /usr/bin/swift[0x4778c4] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0)[0x7f80fafd5830] /usr/bin/swift[0x475179] Stack dump: 0. Program arguments: /usr/bin/swift -frontend -interpret /usercode/main.swift -disable-objc-interop -module-name main ...

11:32 AM

stderr-4.1.1.txt

1003 bytes

これはコンパイルできるべき？

変なエラーだ

11:35 AM

普通だったらDのconform Aはこのextensionに書きそうなパターンだね (edited)

11:36 AM

これ自体が正当なのかはよくわからないけど・・・,

struct Path<T1, T2> {} protocol PathConstructorType { associatedtype T1 associatedtype T2 associatedtype PathType = Path<T1, T2> } struct PathConstructor<T1, T2>: PathConstructorType { func create(path: [String]) -> PathType { fatalError() } } extension PathConstructor where T2: PathConstructorType { typealias PathType = Path<T1, T2.PathType> }

実際のコードはこんな感じで、PathConstructor<T1, PathConstructor<T2, T3>> を Path<T1, Path<T2, T3>> に変換するために再帰させたいなーと

なんとなく、assoctypeの確定とconformは同時でないといけない気がしている。

where 付き extensionで associatedtype を上書きですかー。 (edited)

11:46 AM

@swiftbot --version=2018-05-29-a,4.1.1

struct A { } struct B { } protocol P { associatedtype Assoc = A } struct S<T>: P { } extension S where T == Int { typealias Assoc = B } print(S<String>.Assoc())

(edited)

1

(edited)

rintaro

struct A { } struct B { } protocol P { associatedtype Assoc = A } struct S<T>: P { } extension S where T == Int { typealias Assoc = B } print(S<String>.Assoc())

Version:

swift-4.2-DEVELOPMENT-SNAPSHOT-2018-05-29-a

Output:

B()

Error:

Version:

swift-4.1.1-RELEASE

Output:

B()

Error:

うまく動いてないことだけは確かだ。

@swiftbot --version=2018-05-29-a,4.1.1

protocol P { typealias Assoc = A } struct A {} struct B: P { typealias Assoc = Int } struct S<T>: P {} extension S where T: P { typealias Assoc = T.Assoc } print(type(of: S<B>.Assoc.self))

(edited)

1

(edited)

kateinoigakukun

protocol P { typealias Assoc = A } struct A {} struct B: P { typealias Assoc = Int } struct S<T>: P {} extension S where T: P { typealias Assoc = T.Assoc } print(type(of: S<B>.Assoc.self))

Version:

swift-4.2-DEVELOPMENT-SNAPSHOT-2018-05-29-a

Output:

A.Type

Error:

Version:

swift-4.1.1-RELEASE

Output:

A.Type

Error:

@swift-main

protocol P { typealias Assoc = A } struct A {} struct B: P { typealias Assoc = Int } struct S<T>: P {} extension S where T: P { typealias Assoc = T.Assoc } print(type(of: S<B>.Assoc.self))

A.Type

サポートされるべきか否かはともかく、意図しない動きなのは確かなので、イシュー上げておいたほうが良いと思います。

そうですねー。上げておきます。

1

12:05 PM

Parameterized extensionsが入ればprotocolのconformで迂回する必要が無くなるので治るかも

@Yuta Saito

PathConstructor<T1, PathConstructor<T2, T3>> を Path<T1, Path<T2, T3>> に変換するために再帰させたいなーと

本来やりたいのは↓のようなことということですか？

struct Path<T1, T2> {} struct PathConstructor<T1, T2> { func create(path: [String]) -> Path<T1, T2> { fatalError() } } extension<T3, T4> PathConstructor where T2 == PathConstructor<T3, T4> { func create(path: [String]) -> Path<T1, Path<T3, T4>> { fatalError() } }

@koher ちょっと僕の言葉が足りてなかったです。 Tnまで再帰させたかったんで、parameterized exを使うとこんな感じです

struct Path<T1, T2> {} struct PathConstructor<T1, T2> { typealias PathType = Path<T1, T2> } extension<T3, T4> PathConstructor where T2 == PathConstructor<T3, T4> { typealias PathType = Path<T1, T2.PathType> } extension PathConstructor { func create(path: [String]) -> PathType { fatalError() } }

(edited)

3:52 AM

あー、extension でtypealias 上書き出来ないか

@Yuta Saito 最近、 Parameterized Extension が必要と思われていたものが、なしで実装できたケースがあったのでもしかしたらと思ったんですが・・・。 @swiftbot

extension Optional { func flatten<T>() -> T? where Wrapped == T? { return flatMap { $0 } } } let a: Int?? = .some(.some(42)) let b: Int? = a.flatten() print(String(describing: b))

(edited)

1

(edited)

koher

extension Optional { func flatten<T>() -> T? where Wrapped == T? { return flatMap { $0 } } } let a: Int?? = .some(.some(42)) let b: Int? = a.flatten() print(String(describing: b))

Version:

swift-4.1.1-RELEASE

Output:

Optional(42)

Error:

@koher ジェネリスメソッドのwhere句で回避できるんですね。

5:14 AM

よくよく考えたら今回の問題はparameterized extension ではなくて、型条件によってtypealiasの宣言の形を切り替えられるようにならないといけないのかもしれないです (edited)

5:15 AM

@swiftbot struct A<T> { } extension A where T == Bool { typealias B = String } extension A { typealias B = Int }

1

kateinoigakukun

struct A<T> { } extension A where T == Bool { typealias B = String } extension A { typealias B = Int }

Version:

swift-4.1.1-RELEASE

Output:

Error:

/usercode/main.swift:7:13: error: invalid redeclaration of 'B' typealias B = Int ^ /usercode/main.swift:4:13: note: 'B' previously declared here typealias B = String ^

要はこれが通るようになってほしいという話でした

それでいうとそもそもprotocol+assoctypeをもう一個外側に定義しないとだめだと思う

5:17 AM

genericsでtypealias切り替えはちょっと無理筋

5:17 AM

っぽい

@swiftbot

protocol P { associatedtype T1 associatedtype T2 } extension P where T1 == Int { typealias T2 = String } struct A<T>: P { typealias T1 = T } print(A<String>.T2.self)

1

kateinoigakukun

protocol P { associatedtype T1 associatedtype T2 } extension P where T1 == Int { typealias T2 = String } struct A<T>: P { typealias T1 = T } print(A<String>.T2.self)

Version:

swift-4.1.1-RELEASE

Output:

String

Error:

@tarunon こういうことですか？

T2を定義する型は分離しておいて、A: HasT2 where T == Intかな

@swiftbot

protocol P { associatedtype T1 } protocol HasT2 { associatedtype T2 } struct A<T>: P { typealias T1 = T } extension A: HasT2 where T == Int { typealias T2 = String } print(A<String>.T2.self)

1

kateinoigakukun

protocol P { associatedtype T1 } protocol HasT2 { associatedtype T2 } struct A<T>: P { typealias T1 = T } extension A: HasT2 where T == Int { typealias T2 = String } print(A<String>.T2.self)

Version:

swift-4.1.1-RELEASE

Output:

String

Error:

なんじゃこりゃ

あれ、何これは、、、

@swiftbot

protocol P { associatedtype T1 } protocol HasT2 { associatedtype T2 } struct A<T>: P { typealias T1 = T } extension A: HasT2 where T == Int { typealias T2 = String } func f<A: HasT2>(_ a: A.Type) {} f(A<String>.self)

1

kateinoigakukun

protocol P { associatedtype T1 } protocol HasT2 { associatedtype T2 } struct A<T>: P { typealias T1 = T } extension A: HasT2 where T == Int { typealias T2 = String } func f<A: HasT2>(_ a: A.Type) {} f(A<String>.self)

Version:

swift-4.1.1-RELEASE

Output:

Error:

/usercode/main.swift:15:1: error: 'String' is not convertible to 'Int' f(A<String>.self) ^

これは正しい

where無視してtypealiasが生えてる？

5:40 AM

あー、だからwhereの条件下のみで使える型をtypealiasに使うとコンパイラクラッシュするのか昨日のrintaroさんのコードの意図読み間違えてたな (edited)

@swift-4.2.4

protocol A { associatedtype X } protocol B { associatedtype Y } protocol C { associatedtype Y } struct M<T>: A { typealias X = T } extension M: B where X == Int { typealias Y = Int } extension M: C where X == String { typealias Y = String }

exit status: 1 with stderr:

<stdin>:21:15: error: invalid redeclaration of 'Y' typealias Y = String ^ <stdin>:17:15: note: 'Y' previously declared here typealias Y = Int ^ <stdin>:16:1: error: type 'M<T>' does not conform to protocol 'B' extension M: B where X == Int { ^ <stdin>:5:20: note: multiple matching types named 'Y' associatedtype Y ^ <stdin>:17:15: note: possibly intended match typealias Y = Int ^ <stdin>:21:15: note: possibly intended match typealias Y = String ^ <stdin>:20:1: error: type 'M<T>' does not conform to protocol 'C' extension M: C where X == String { ^ <stdin>:9:20: note: multiple matching types named 'Y' associatedtype Y ^ <stdin>:17:15: note: possibly intended match typealias Y = Int ^ <stdin>:21:15: note: possibly intended match typealias Y = String ^

だめなんやなぁ

5:54 AM

根っこから具体型分けるのが健全すね

5:54 AM

仕方ない

@swift-4.2.4 let a: Float80 = 0

no output

コンパイラクラッシュ https://bugs.swift.org/browse/SR-8119 で更新できていなかったnightlyを久しぶりに更新。 @swift-main import Foundation print(ProcessInfo.processInfo.environment["SWIFT_VERSION"]!)

DEVELOPMENT-SNAPSHOT-2018-06-26-a

@swift-4.1.3

Usage: @swift41 [SWIFT_OPTIONS] ``` [Swift Code] ```

@swift-4.1.3

import Foundation var formatter = ISO8601DateFormatter() formatter.formatOptions = .withFullDate let date = formatter.date(from: "2018-06-30") print(date)

Optional(2018-06-30 00:00:00 +0000)stderr:

<stdin>:5:7: warning: expression implicitly coerced from 'Date?' to Any print(date) ^~~~ <stdin>:5:7: note: provide a default value to avoid this warning print(date) ^~~~ ?? <#default value#> <stdin>:5:7: note: force-unwrap the value to avoid this warning print(date) ^~~~ ! <stdin>:5:7: note: explicitly cast to Any with 'as Any' to silence this warning print(date) ^~~~ as Any

@swift-4.1.3 class A { init() {} convenience init(s: String) { print(self.init()) } } (edited)

exit status: 134 with stderr:

swift: /home/buildnode/jenkins/workspace/oss-swift-4.1-package-linux-ubuntu-16_04/swift/lib/Sema/CSApply.cpp:5684: swift::Expr *(anonymous namespace)::ExprRewriter::coerceCallArguments(swift::Expr *, swift::AnyFunctionType *, swift::ApplyExpr *, ArrayRef<swift::Identifier>, bool, swift::constraints::ConstraintLocatorBuilder): Assertion `fromTupleExpr.size() == 1 && fromTupleExpr[0]' failed. #0 0x0000000003f25074 PrintStackTraceSignalHandler(void*) (/usr/bin/swift+0x3f25074) #1 0x0000000003f253b6 SignalHandler(int) (/usr/bin/swift+0x3f253b6) #2 0x00007f4f34d07390 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x11390) #3 0x00007f4f33446428 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x35428) #4 0x00007f4f3344802a abort (/lib/x86_64-linux-gnu/libc.so.6+0x3702a) #5 0x00007f4f3343ebd7 (/lib/x86_64-linux-gnu/libc.so.6+0x2dbd7) #6 0x00007f4f3343ec82 (/lib/x86_64-linux-gnu/libc.so.6+0x2dc82) #7 0x0000000001399d4e (anonymous namespace)::ExprRewriter::coerceCallArguments(swift::Expr*, swift::AnyFunctionType*, swift::ApplyExpr*, llvm::ArrayRef<swift::Identifier>, bool, swift::constraints::ConstraintLocatorBuilder) (/usr/bin/swift+0x1399d4e) #8 0x0000000001383604 (anonymous namespace)::ExprRewriter::finishApply(swift::ApplyExpr*, swift::Type, swift::constraints::ConstraintLocatorBuilder) (/usr/bin/swift+0x1383604) #9 0x000000000139b0e3 (anonymous namespace)::ExprRewriter::visitApplyExpr(swift::ApplyExpr*) (/usr/bin/swift+0x139b0e3) #10 0x000000000137fbd4 (anonymous namespace)::ExprRewriter::walkToExprPost(swift::Expr*) (/usr/bin/swift+0x137fbd4) #11 0x0000000001385621 (anonymous namespace)::ExprWalker::walkToExprPost(swift::Expr*) (/usr/bin/swift+0x1385621) #12 0x000000000167719c swift::Expr::walk(swift::ASTWalker&) (/usr/bin/swift+0x167719c) #13 0x000000000137c7ef swift::constraints::ConstraintSystem::applySolution(swift::constraints::Solution&, swift::Expr*, swift::Type, bool, bool, bool) (/usr/bin/swift+0x137c7ef) #14 0x00000000012c64b6

(edited)

stderr.txt

https://file.io/g3yXsb

@swiftbot !install swift-4.2-DEVELOPMENT-SNAPSHOT-2018-07-02-a

The command '/bin/sh -c SWIFT_URL=https://swift.org/builds/$SWIFT_BRANCH/$(echo "$SWIFT_PLATFORM" | tr -d .)/$SWIFT_VERSION/$SWIFT_VERSION-$SWIFT_PLATFORM.tar.gz && curl -fSsL $SWIFT_URL -o swift.tar.gz && curl -fSsL $SWIFT_URL.sig -o swift.tar.gz.sig && export GNUPGHOME="$(mktemp -d)" && tar -xzf swift.tar.gz --directory / --strip-components=1 && rm -r "$GNUPGHOME" swift.tar.gz.sig swift.tar.gz && chmod -R o+r /usr/lib/swift' returned a non-zero code: 22

@swiftbot versions

2018-05-29-a 2018-05-08-a 2018-05-02-a 2018-04-25-a 2018-04-23-a 4.1.1 4.1 4.0.3 4.0.2 4.0 3.1.1 3.1 3.0.2 3.0.1

@swiftbot public func p(_ items: Any...) {} class A { init() {} convenience init(s: String) { p(self.init()) } }

1

kishikawakatsumi

public func p(_ items: Any...) {} class A { init() {} convenience init(s: String) { p(self.init()) } }

Version:

swift-4.1.1-RELEASE

Output:

Error:

swift: /home/buildnode/jenkins/workspace/oss-swift-4.1-package-linux-ubuntu-16_04/swift/lib/Sema/CSApply.cpp:5684: swift::Expr *(anonymous namespace)::ExprRewriter::coerceCallArguments(swift::Expr *, swift::AnyFunctionType *, swift::ApplyExpr *, ArrayRef<swift::Identifier>, bool, swift::constraints::ConstraintLocatorBuilder): Assertion `fromTupleExpr.size() == 1 && fromTupleExpr[0]' failed. /usr/bin/swift[0x3f24d64] /usr/bin/swift[0x3f250a6] /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7f167dc3e390] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0x38)[0x7f167c37d428] /lib/x86_64-linux-gnu/libc.so.6(abort+0x16a)[0x7f167c37f02a] /lib/x86_64-linux-gnu/libc.so.6(+0x2dbd7)[0x7f167c375bd7] /lib/x86_64-linux-gnu/libc.so.6(+0x2dc82)[0x7f167c375c82] /usr/bin/swift[0x1399b2e] /usr/bin/swift[0x13833e4] /usr/bin/swift[0x139aec3] /usr/bin/swift[0x137f9b4] /usr/bin/swift[0x1385401] /usr/bin/swift[0x1676f7c] /usr/bin/swift[0x137c5cf] /usr/bin/swift[0x12c6296] /usr/bin/swift[0x1355fd6] ...

5:32 AM

stderr-4.1.1.txt

1.71 KB

久しぶりにコンパイラのバグを見つけた。

https://github.com/apple/swift/pull/17696 直してみましたー

[Sema] Don't make argument paren target of RebindSelfInConstructor...

For (previously crashing): class A { init() {} convenience init(s: String) { print(self.init()) } } target of RebindSelfInConstructorExpr should be call expression self.init() ...

まさかレポートする前に直るとは

8:11 AM

self.init()の戻り値を変数に受けられないっていうの初めて知ったんですよね。

type checker 上ではリターンタイプは Void として扱われていますね。

@swiftbot import Foundation print("Good night") sleep(1) print("Morning")

7:43 AM

あれ、これダメでしたか

バッククォート３つではさみます。

1

+swift

1

swiftはなくてもOKになりました。 (edited)

1

@swiftbot ではswiftなしで。 import Foundation print("Good night") sleep(1) print("Morning")

1

Ohta

import Foundation print("Good night") sleep(1) print("Morning")

Version:

swift-4.1.1-RELEASE

Output:

Good night Morning

Error:

sleepは実行結果だけ見るとわからないですね。

7:45 AM

Playgroundみたいに１行1行について実行した結果のデータを見られるとおもしろいんですけど。

@swiftbot

import Foundation //import PlaygroundSupport //PlaygroundPage.current.needsIndefiniteExecution = true let group1 = DispatchGroup() func a(_ name: String) { group1.enter() print("Good night, \(name)..") sleep(2) print("Morning, \(name)!") group1.leave() } DispatchQueue.global().async { a("Anna") } DispatchQueue.global().async { a("Bob") } DispatchQueue.global().async { a("Cony") } group1.notify(queue: .main) { print("*** Good morning, all! ***") //PlaygroundPage.current.finishExecution() } // Xcode 9.4.1 と 10.0 beta2 どちらも同じ結果でした /* Playground Settings - Platform: macOS Good night, Cony.. Good night, Anna.. Good night, Bob.. Morning, Cony! Morning, Bob! Morning, Anna! *** Good morning, all! *** */ /* Playground Settings - Platform: iOS Good night, Anna.. Good night, Cony.. Good night, Bob.. *** Good morning, all! *** */

1

Ohta

import Foundation //import PlaygroundSupport //PlaygroundPage.current.needsIndefiniteExecution = true let group1 = DispatchGroup() func a(_ name: String) { group1.enter() print("Good night, \(name)..") sleep(2) print("Morning, \(name)!") group1.leave() } DispatchQueue.global().async { a("Anna") } DispatchQueue.global().async { a("Bob") } DispatchQueue.global().async { a("Cony") } group1.notify(queue: .main) { print("*** Good morning, all! ***") //PlaygroundPage.current.finishExecution() } // Xcode 9.4.1 と 10.0 beta2 どちらも同じ結果でした /* Playground Settings - Platform: macOS Good night, Cony.. Good night, Anna.. Good night, Bob.. Morning, Cony! Morning, Bob! Morning, Anna! *** Good morning, all! *** */ /* Playground Settings - Platform: iOS Good night, Anna.. Good night, Cony.. Good night, Bob.. *** Good morning, all! *** */

Version:

swift-4.1.1-RELEASE

Output:

Good night, Anna.. Good night, Bob..

Error:

Sleep(2) では時間切れになってしまうようですね

import Foundation import PlaygroundSupport PlaygroundPage.current.needsIndefiniteExecution = true let group1 = DispatchGroup() func a(_ name: String) { group1.enter() print("Good night, \(name)..") sleep(2) print("Morning, \(name)!") group1.leave() } DispatchQueue.global().async { a("Anna") } DispatchQueue.global().async { a("Bob") } DispatchQueue.global().async { a("Cony") } group1.notify(queue: .main) { print("*** Good morning, all! ***") PlaygroundPage.current.finishExecution() } // Xcode 9.4.1 と 10.0 beta2 どちらも同じ結果でした /* Playground Settings - Platform: macOS Good night, Cony.. Good night, Anna.. Good night, Bob.. Morning, Cony! Morning, Bob! Morning, Anna! *** Good morning, all! *** */ /* Playground Settings - Platform: iOS Good night, Anna.. Good night, Cony.. Good night, Bob.. *** Good morning, all! *** */

上記のコードを Playgroundで実行すると、Platformによって実行結果が変わってしまいます。macOSにすると望む結果になるんですけど、iOSだと待ち合わせしてくれないのです。 (edited)

@n.0939 notifyって、そのグループのenter数が1->0になるタイミングを待つんじゃないですかね？

7:50 AM

そのコードだと、関数aの呼び出しがグローバルキューに投げられているので、

7:51 AM

あいや、いいのか、sleepしているから、必ず３つのenterが先行しているんですね。

7:53 AM

ん

7:54 AM

1つめのenterよりもはやくnotifyして即抜けしているけど

7:54 AM

printの前後順だけはすり替わってる？

7:55 AM

@swiftbot

import Foundation let group1 = DispatchGroup() group1.notify(queue: .main) { print("*** Good morning, all! ***") } sleep(1)

(edited)

1

(edited)

omochimetaru

import Foundation let group1 = DispatchGroup() group1.notify(queue: .main) { print("*** Good morning, all! ***") } sleep(1)

Version:

swift-4.1.1-RELEASE

Output:

Error:

@swiftbot

import Foundation let task = DispatchQueue(label: "task") let group1 = DispatchGroup() group1.notify(queue: task) { print("*** Good morning, all! ***") } sleep(1)

1

omochimetaru

import Foundation let task = DispatchQueue(label: "task") let group1 = DispatchGroup() group1.notify(queue: task) { print("*** Good morning, all! ***") } sleep(1)

Version:

swift-4.1.1-RELEASE

Output:

*** Good morning, all! ***

Error:

@n.0939 多分起きているのは↑こういうことだと思います。 1つ目のenterよりも先にnotifyしていて、即座に実行されている

？？

3つのenterのあとで、notifyが呼ばれる必要があると思います。 (edited)

1

あー

8:00 AM

ありがとうございます！

8:02 AM

そうか、enter --> notify の順に書いたつもりだけど、enterは async ブロックの中に置いてあるから後で実行される可能性があるのか。。。

はい。

なので、iOSかmacOSかによって実行結果が変わったのか。。

そこのスケジューリングの運によって変わったようですね

なるほどー。実は複雑になるので述べなかったのですが、tvOSを選択すると結果が様々に（iOS的だったりmacOS的だったり）なっていたのです。

8:04 AM

@omochimetaru ありがとうございます

import Foundation let group1 = DispatchGroup() func a(_ name: String) { print("Good night, \(name)..") sleep(2) print("Morning, \(name)!") group1.leave() } group1.enter() DispatchQueue.global().async { a("Anna") } group1.enter() DispatchQueue.global().async { a("Bob") } group1.enter() DispatchQueue.global().async { a("Cony") } group1.notify(queue: .main) { print("*** Good morning, all! ***") }

8:05 AM

↑これでいつも期待した挙動に。

8:05 AM

これ合法なのかよくわかんないですけど・・・

@omochimetaru

1

@swift-4.1.3

import Foundation let group1 = DispatchGroup() func a(_ name: String) { print("Good night, \(name)..") sleep(2) print("Morning, \(name)!") } DispatchQueue.global().async(group: group1) { a("Anna") } DispatchQueue.global().async(group: group1) { a("Bob") } DispatchQueue.global().async(group: group1) { a("Cony") } group1.notify(queue: .main) { print("*** Good morning, all! ***") exit(0) } dispatchMain()

Good night, Anna.. Good night, Bob.. Good night, Cony.. Morning, Anna! Morning, Bob! Morning, Cony! *** Good morning, all! ***

async(group:)というのがあるのか！

おー！

@norio_nomura ありがとうございます。

1

1:01 AM

話が少しずれるんですけど、https://developer.apple.com/search/?q=async で検索してみたら、、、 (edited)

Search - Apple Developer

Search - Developer

1:02 AM

こんな感じで Videoの中を検索してくれるようです。知らなかった。しかも asynchronous と発語されたところから再生できるのか。すごい

(edited)

async(group:execute:)は iOS 8から存在してました

https://developer.apple.com/documentation/dispatch/dispatchqueue/2300095-async (edited)

DispatchGroupのenterとleaveの説明が explicitly って書いてあったから

4:57 AM

implicitlyなやり方があるんだろうなと思ったけど、DispatchGroupのドキュメントには見つからなかったのは

4:57 AM

DispatchQueueの方のメソッドだったからだった。

1

あなたの会社のSlackでもSwiftbotがつくれる by @Nonchalant https://github.com/Nonchalant/SwiftBot

Nonchalant/SwiftBot

SwiftBot - Execute Swift on Slack

2

^ めっちゃシンプルなコードで実現されている

コードを見ると、ユーザーがSLACK_BOT_TOKENとか簡単に取得できそうだけど大丈夫なのかな… (edited)

とりあえず会社内でしか使わない前提ですよね。

その前提ですね！swiftを経由してシェルコマンドとかも呼べちゃうので脆弱性に関しては目をつぶってる感じです...

なるほど。

もしかして、Slackの場合アカウントがサーバー毎に分かれてるから、勝手に他所のサーバーへ招かれる心配が少ないのかな。

最近のSlackBotはすごいリッチなUIを返したりできるっぽくて、パラメータとか工夫しなくても便利にできそうなんですよね。

12:55 PM

なんかドロップダウンリストを表示したりできるらしい。

勝手に他所のサーバーへ招かれる心配が少ないのかな。

Discordの場合、アバター画像URLに含まれるユーザーIDを使って他のサーバーへ招待できてしまう。

Botじゃなくて普通のユーザーを、ってことですか？

1:28 PM

Botは無理ですよね。

きしかわさんのswiftbotを僕がボットを追加可能なサーバーへ招待する画面。

1

1:39 PM

公開botにしてなければ出来ないのかな？

Botはトークンを知らないとダメだと思ってましたけど、いらないんですね。

swift-nightlyとswift-tensorflowはPackageDescription API v3の廃止によりビルド出来なくなり、更新が止まっています。

1

3:19 AM

どの様に対処するか思案中。

@swift-4.2.4 let wat: Int? = nil if let _: Int? = wat { print("1") } if let _: Any? = wat { print("2") }

1stderr:

<stdin>:2:4: warning: explicitly specified type 'Int?' adds an additional level of optional to the initializer, making the optional check always succeed if let _: Int? = wat { print("1") } ^ ~~~~ ~~~ Int

２つ目の解釈変じゃない？

きっかけはこれ https://twitter.com/lorentey/status/1020103874324180994

Karoy Lorentey (@lorentey)

Amazingly, 23% of people got the correct answer: it only prints 1.

The 1st condition succeeds because wat is implicitly promoted to Int?? (with a nice compiler warning)
The 2nd condition fails because… uh… it doesn’t get promoted this time, eh? Hm. https://t.co/f...

なるほど・・・

7:04 AM

23%の人すごいね。

2の事象に気づいていたのか、適当なのかはわからんけどw

swift-nightlyとswift-tensorflow復活。 @swift-main

enum Result<Value, Error> { case success(Value) case failure(Error) } extension Result: Equatable where Value: Equatable, Error: Equatable { static func == (lhs: Result, rhs: Result) -> Bool { switch (lhs, rhs) { case let (.success(lhs), .success(rhs)): return lhs == rhs case let (.failure(lhs), .failure(rhs)): return lhs == rhs case (.success, .failure), (.failure, .success): return false } } } print(Result<String, Never>.success("a") == Result<String, Never>.success("b"))

1

false

@swift-main @swift-tensorflow import Foundation print(ProcessInfo.processInfo.environment["SWIFT_VERSION"] ?? "")

DEVELOPMENT-SNAPSHOT-2018-07-20-a

DEVELOPMENT-2018-07-19-a

rdar://problem/40916953 @swift-4.1.3 @swift-4.2.4 -suppress-warnings

struct ConditionalCast<T> { static func cast(value: Any?) -> T? { return value as? T } } print(ConditionalCast<Int?>.cast(value: nil))

nil

Optional(nil)

これはどっちに転けても正しそう

New in Xcode 10 beta 4 – Swift and Apple Clang Compilersに記載された挙動です。

4.1.3-RELEASE

@swift-4.1.3

class Object { func foo() -> String { return "from Object" } } class Child: Object { override func foo() -> String { return "from Child" } } let child = unsafeBitCast(Object(), to: Child.self) print(child.foo())

from Childstderr:

<stdin>:12:13: warning: 'unsafeBitCast' from 'Object' to 'Child' can be replaced with 'unsafeDowncast' let child = unsafeBitCast(Object(), to: Child.self) ^~~~~~~~~~~~~ unsafeDowncast

え、、

なんか増えとる。

あるね

childの型がコンパイル時に決まると最適化でこうなる

9:37 AM

dynamic typeか

へえ。

4.1.3出たのはいいけど、対応するXcodeがないんだよなぁ

4.1.3はLinuxOnlyじゃなかったっけ

1

あ、ほんとだ

*Swift 4.1.3 is Linux only change, Swift 4.1.2 is available as part of Xcode 9.4.

1

@swift-4.1.3 @swift-main -Xfrontend -print-ast func f(a: Int = 1){}

internal func f(a: Int = default)

internal func f(a: Int = 1)

お、値見えるようになるんですかね

rintaro昨日 午後4時15分 https://github.com/apple/swift/pull/18579 これは嬉しい！インターフェイスでデフォルト値が default じゃなくてきちんと表示されるようになります。

それです。

-print-ast が対応してるんですね

@swift-4.2.4 @swift-main class Super<T> {} class Sub: Super<Sub> {} print(Sub()) (edited)

execution timeout with no output

@swift-4.0.3

protocol Animal {} extension Animal { init(_animal: Self) { self = _animal } } class AnimalBase: Animal { convenience init(with animal: AnimalBase) { self.init(_animal: animal) } } class Cat: AnimalBase { let _name = "Tama" var name: String { return _name } func bark() { print("cat \(self.name)") } } class Dog: AnimalBase {} let animal = Cat(with: Dog()) animal.bark()

(edited)

exit status: 11 with stderr:

#0 0x0000000003ae91b8 llvm::sys::PrintStackTrace(llvm::raw_ostream&) (/usr/bin/swift+0x3ae91b8) #1 0x0000000003ae98f6 SignalHandler(int) (/usr/bin/swift+0x3ae98f6) #2 0x00007fa453580390 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x11390) #3 0x00007fa44ed5824f _swift_retain_ (/usr/lib/swift/linux/libswiftCore.so+0x41324f) #4 0x00007fa4539af2f9 #5 0x00007fa4539af405 #6 0x00007fa4539af06b #7 0x0000000000f348bf llvm::MCJIT::runFunction(llvm::Function*, llvm::ArrayRef<llvm::GenericValue>) (/usr/bin/swift+0xf348bf) #8 0x0000000000f38a62 llvm::ExecutionEngine::runFunctionAsMain(llvm::Function*, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&, char const* const*) (/usr/bin/swift+0xf38a62) #9 0x00000000004bf776 swift::RunImmediately(swift::CompilerInstance&, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&, swift::IRGenOptions&, swift::SILOptions const&) (/usr/bin/swift+0x4bf776) #10 0x00000000004ae580 performCompile(swift::CompilerInstance&, swift::CompilerInvocation&, llvm::ArrayRef<char const*>, int&, swift::FrontendObserver*, swift::UnifiedStatsReporter*) (/usr/bin/swift+0x4ae580) #11 0x00000000004aa52b swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) (/usr/bin/swift+0x4aa52b) #12 0x0000000000465564 main (/usr/bin/swift+0x465564) #13 0x00007fa451caa830 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x20830) #14 0x0000000000462e29 _start (/usr/bin/swift+0x462e29) Stack dump: 0. Program arguments: /usr/bin/swift -frontend -interpret - -disable-objc-interop -I /Libraries/.build/x86_64-unknown-linux/debug -I /Libraries/.build/checkouts/engine.git--3106915580378752918/Sources/CHTTP/inc

(edited)

stderr.txt

https://file.io/mHStFE

やっぱり self.init(_animal: animal) が通るのヤバですね

うむ〜

@swiftbot fatalError()

1

omochimetaru

fatalError()

Version:

swift-4.1.1-RELEASE

Output:

Error:

Fatal error: file /usercode/main.swift, line 1 Current stack trace: 0 libswiftCore.so 0x00007f64e85c55c0 _swift_stdlib_reportFatalErrorInFile + 221 1 libswiftCore.so 0x00007f64e83343dc <unavailable> + 1369052 2 libswiftCore.so 0x00007f64e856e222 <unavailable> + 3703330 3 libswiftCore.so 0x00007f64e856f689 <unavailable> + 3708553 4 libswiftCore.so 0x00007f64e8333ad6 <unavailable> + 1366742 5 libswiftCore.so 0x00007f64e856dfeb <unavailable> + 3702763 6 libswiftCore.so 0x00007f64e8333ad6 <unavailable> + 1366742 7 libswiftCore.so 0x00007f64e84a0f79 <unavailable> + 2862969 8 libswiftCore.so 0x00007f64e8333440 _assertionFailure(_:_:file:line:flags:) + 44 10 swift 0x0000000000fed1ce <unavailable> + 12505550 ...

6:59 AM

stderr-4.1.1.txt

2.25 KB

@swiftbot import Foundation "".enumerateLines { (a, b) in }

1

omochimetaru

import Foundation "".enumerateLines { (a, b) in }

Version:

swift-4.1.1-RELEASE

Output:

Error:

Fatal error: enumerateSubstrings(in:options:using:) is not yet implemented: file Foundation/NSString.swift, line 791 /usr/bin/swift[0x3f24d64] /usr/bin/swift[0x3f250a6] /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7f1619b01390] /usr/lib/swift/linux/libswiftCore.so(+0x2baf79)[0x7f1614d3ff79] /usr/lib/swift/linux/libswiftCore.so(_T0s17_assertionFailures5NeverOs12StaticStringV_SSAE4fileSu4lines6UInt32V5flagstF+0x2c)[0x7f1614bd246c] /usr/lib/swift/linux/libFoundation.so(+0x50438f)[0x7f160ddd538f] /usr/lib/swift/linux/libFoundation.so(+0x50425a)[0x7f160ddd525a] /usr/lib/swift/linux/libFoundation.so(_T010Foundation8NSStringC14enumerateLinesyySS_SpyAA8ObjCBoolVGtcF+0x77)[0x7f160de63117] /usr/lib/swift/linux/libFoundation.so(_T0s14StringProtocolP10FoundationSS5IndexVADRtzrlE14enumerateLinesyySS_Sbztc8invoking_tF+0xa0)[0x7f160de79620] [0x7f1619f310c3] /usr/bin/swift[0xfed1ce] /usr/bin/swift[0xff1692] /usr/bin/swift[0x4d9076] /usr/bin/swift[0x4c35d3] /usr/bin/swift[0x4beecc] ...

6:59 AM

stderr-4.1.1.txt

1.28 KB

@swift-4.0.3

class Person { var name: String var friends: [Person] = [] var bestFriend: Person? = nil init(name: String) { self.name = name } } _ = \Person.bestFriend?.name

no output

@swiftbot --version=4.0

class Person { var name: String var friends: [Person] = [] var bestFriend: Person? = nil init(name: String) { self.name = name } } _ = \Person.bestFriend?.name

1

ikesyo

class Person { var name: String var friends: [Person] = [] var bestFriend: Person? = nil init(name: String) { self.name = name } } _ = \Person.bestFriend?.name

Version:

swift-4.0-RELEASE

Output:

Error:

-Xfrontendではなく-frontendが使える様になりました。 @swift-4.2.4 -frontend -print-ast func f(n: Int = 1) {}

internal func f(n: Int = default)

さらに-frontend -replも使える様になりました。 @swift-4.2.4 -frontend -repl import RxSwift :print_decl Observable

class Observable<Element> : ObservableType { typealias E = Element init() func subscribe<O>(_ observer: O) -> Disposable where Element == O.E, O : ObserverType func asObservable() -> Observable<Observable<Element>.E> @objc deinit func composeMap<R>(_ transform: @escaping (Element) throws -> R) -> Observable<R> } extension Observable { @available(*, deprecated, renamed: "from(optional:)", message: "Implicit conversions from any type to optional type are allowed and that is causing issues with `from` operator overloading.") static func from(_ optional: Observable<Element>.E?) -> Observable<Observable<Element>.E> @available(*, deprecated, renamed: "from(optional:scheduler:)", message: "Implicit conversions from any type to optional type are allowed and that is causing issues with `from` operator overloading.") static func from(_ optional: Observable<Element>.E?, scheduler: ImmediateSchedulerType) -> Observable<Observable<Element>.E> }

@swift-4.1.3 @swift-4.2.4 -frontend -repl :print_decl Hashable (edited)

protocol Hashable : Equatable { var hashValue: Int { get } func hash(into hasher: inout Hasher) } (edited)

protocol Hashable : Equatable { var hashValue: Int { get } }

@swiftbot help

Usage: @swiftbot [--version=SWIFT_VERSION] [--command={swift, swiftc}] [--options=SWIFTC_OPTIONS] ``` [Swift Code] ``` Examples: @swiftbot ``` print("Hello world!") ``` @swiftbot --version=4.0.3 ``` print("Hello world!") ``` @swiftbot --command=swiftc --options=-dump-parse ``` print("Hello world!") ``` Subcommands: @swiftbot versions: show available Swift toolchain versions @swiftbot contribute: show repository URLs @swiftbot help: show help

@swiftbot --version=4.2 print("hello")

1

bannzai

print("hello")

Version:

⚠️ 4.2

Error:

Swift '4.2' toolchain is not supported.

すまぬ

7:08 AM

のむらさんの方は使えるはず

+

7:08 AM

@swift-4.2.4 print("hello")

hello

@swift-4.2.4

struct Stone { var x: Int { get { return 1 } _modify { var x: Int = 3 yield &x y = x } } var y: Int = 0 } func mod(_ x: inout Int) { x = 8 } func main() { var a = Stone() mod(&a.x) print(a.y) } main()

exit status: 1 with stderr:

<stdin>:7:9: error: expected 'get', 'set', 'willSet', or 'didSet' keyword to start an accessor definition _modify { ^ <stdin>:23:9: error: cannot pass immutable value as inout argument: 'x' is a get-only property mod(&a.x) ^~~~

https://gist.github.com/omochi/b31f4916fda78e9a2e804c4b2233370d これを試したかったが、ここにもないかんじか (edited)

coro-modify.swift

GitHub Gist: instantly share code, notes, and snippets.

@swift-main ←これで

1

exit status: 2 with stderr:error: unable to invoke subcommand: /usr/bin/swift-←これで (No such file or directory)

1

@swift-nightly

struct Stone { var x: Int { get { return 1 } _modify { var x: Int = 3 yield &x y = x } } var y: Int = 0 } func mod(_ x: inout Int) { x = 8 } func main() { var a = Stone() mod(&a.x) print(a.y) } main()

7:10 AM

discord 初心者ガチ勢

7:10 AM

@swift-main

struct Stone { var x: Int { get { return 1 } _modify { var x: Int = 3 yield &x y = x } } var y: Int = 0 } func mod(_ x: inout Int) { x = 8 } func main() { var a = Stone() mod(&a.x) print(a.y) } main()

8

1

@swift-main

struct Stone { var x: Int { get { return 1 } _modify { var x: Int = 3 yield &x y = x } } var y: Int = 0 } func mod(_ x: inout Int) { x = 8 } func main() { var a = Stone() mod(&a.x) print(a.x) print(a.y) } main()

1 8

ボットへの投稿は編集することが出来ます。

1

@swift-main

struct Stone { var x: Int { _modify { var x: Int = 3 yield &x y = x } } var y: Int = 0 } func mod(_ x: inout Int) { x = 8 } func main() { var a = Stone() mod(&a.x) print(a.x) print(a.y) } main()

(edited)

exit status: 1 with stderr:<stdin>:3:9: error: variable with a 'modify' accessor must also have a getter, addressor, or 'read' accessor _modify { ^

便利

7:14 AM

@swift-main

struct Stone { var x: Int { get { return 1 } _modify { var xx: Int = 3 yield &xx y = xx } } var y: Int = 0 } func mod(_ x: inout Int) { x = 8 } func main() { var a = Stone() mod(&a.x) print(a.x) print(a.y) } main()

1 8

@swift-main

struct Stone { var x: Int { get { return 1 } _modify { var xx: Int = 3 print("before yield \(xx)") yield &xx print("after yield \(xx)") y = xx } } var y: Int = 0 } func mod(_ x: inout Int) { print("before modify") x = 8 print("after modify") } func main() { var a = Stone() mod(&a.x) print(a.y) } main()

before yield 3 before modify after modify after yield 8 8

なんで、before modify が 2番目なんだ

7:18 AM

あ、待てよ

コルーチンがはさまってるのは、modの呼び出し前後です

7:18 AM

modの内部での x = 8 は、いままでどおり。

@swift-main

struct Stone { var x: Int { get { return 1 } _modify { var xx: Int = 3 print("before yield \(xx)") yield &xx print("after yield \(xx)") y = xx } } var y: Int = 0 } func mod(_ x: inout Int) { print("before modify") x = 8 print("after modify") } func main() { var a = Stone() print("before coroutine") mod(&a.x) print("after coroutine") print(a.y) } main()

before coroutine before yield 3 before modify after modify after yield 8 after coroutine 8

おお、なるほど。納得できました。ありがとうございます！

これ、従来は、

7:19 AM

modを呼び出す前にテンポラリな変数が作られてmodを呼び出した後

7:19 AM

setterを改めて呼び出して処理結果を格納していたんだけど

7:19 AM

modifyアクセサだったら、そのようなテンポラリな値を作る事なく、一発で内部に（ポインタで）書き込める (edited)

1

@swift-4.2.4

class Hoge { func hoge() { let foo = { [weak self] in print(self) guard let self = self else { return } print(self) } foo() } } Hoge().hoge()

(edited)

Optional(main.Hoge) main.Hogestderr:

<stdin>:4:19: warning: expression implicitly coerced from 'Hoge?' to 'Any' print(self) ^~~~ <stdin>:4:19: note: provide a default value to avoid this warning print(self) ^~~~ ?? <#default value#> <stdin>:4:19: note: force-unwrap the value to avoid this warning print(self) ^~~~ ! <stdin>:4:19: note: explicitly cast to 'Any' with 'as Any' to silence this warning print(self) ^~~~ as Any

(edited)

@swift-main let s = #"a\b\c"# print(s)

exit status: 1 with stderr:

<stdin>:1:13: error: invalid escape sequence in literal let s = #"a\b\c"# ^ <stdin>:1:15: error: invalid escape sequence in literal let s = #"a\b\c"# ^ <stdin>:1:9: error: expected initial value after '=' let s = #"a\b\c"# ^ <stdin>:1:8: error: consecutive statements on a line must be separated by ';' let s = #"a\b\c"# ^ ; <stdin>:1:9: error: expected expression let s = #"a\b\c"# ^

まだダメだったか。

@swift-main --version

Swift version 4.2-dev (LLVM 6d629af647, Clang 257fa19143, Swift 7ad7e1d968) Target: x86_64-unknown-linux-gnu

https://github.com/apple/swift/commit/7ad7e1d968dc0e1a922fed3d6f008218a2a0b097

Merge pull request #19114 from JDevlieghere/master · apple/swift@...

3:25 AM

0904snapshotか

まだ出てないね。 https://github.com/apple/swift/releases

apple/swift

The Swift Programming Language. Contribute to apple/swift development by creating an account on GitHub.

0904の手前がコケまくってますね。

10 日間くらい

SwiftPMのパッケージ分離とかやってたから

3:27 AM

ビルド周りをいじっていて壊れてたのかな

@swift-main let s = #"a\b\c"# print(s)

a\b\c

おお！

12:43 AM

@swift-main -swift-version 5

protocol P {} extension P { init(_with instance: Self) { self = instance } } class Animal : P { init() {} convenience init(with instance: Animal) { self.init(_with: instance) } } class Cat : Animal { override init() {} } class Dog : Animal { override init() {} } let cat: Cat = Cat(with: Dog()) // Dog with Cat type??? print(type(of: cat))

(edited)

exit status: 1 with stderr:

<stdin>:10:22: error: cannot convert value of type 'Animal' to expected argument type 'Self' self.init(_with: instance) ^~~~~~~~ as! Self

(edited)

こっちはまだか。

-swift-version 5 でいかがでしょ？

おおお

この前の @Yuta Saito の self 差し替えのも封じられたかな？最後の付け足しか Q&A かだったのでスライド↓中にコードが見当たらない・・・。 https://speakerdeck.com/kateinoigakukun/konpairakaraniu-jie-kuswift-method-dispatch-1

Yuta Saito

コンパイラから紐解くSwift method dispatch

お！これ治るんですね

1:07 AM

https://gist.github.com/kateinoigakukun/45e5fe1cbb6e1d0d4f093e45b97082f0

instance_swap.swift

GitHub Gist: instantly share code, notes, and snippets.

1:09 AM

@swift-main -swift-version 5

protocol Animal {} extension Animal { init(_animal: Self) { self = _animal } } class AnimalBase: Animal { convenience init(with animal: AnimalBase) { self.init(_animal: animal) } } class Cat: AnimalBase { let _name = "Tama" var name: String { return _name } func bark() { print(name) } } class Dog: AnimalBase {} let animal = Cat(with: Dog()) animal.bark()

exit status: 1 with stderr:

<stdin>:11:28: error: cannot convert value of type 'AnimalBase' to expected argument type 'Self' self.init(_animal: animal) ^~~~~~ as! Self

これは正しい

2

@swift-4.2.4 struct A { var b: Int = 1 @_silgen_name("_T04hoge1AV1bSivg") func itazura() -> Int { return 2 } }

2:33 AM

これ入力に渡すファイル名って任意に決められるんだっけ

-module-name？

ファイル名が変わるわけじゃないけどたしかにモジュール名は指定できるな

@swift-4.2.4 -module-name hoge struct A { var b: Int = 1 @_silgen_name("_T04hoge1AV1bSivg") func itazura() -> Int { return 2 } }

2:47 AM

2:48 AM

@swift-4.1.3 -module-name hoge struct A { var b: Int = 1 @_silgen_name("_T04hoge1AV1bSivg") func itazura() -> Int { return 2 } }

no output

@swift-4.1.3

struct A { var b: Int { return 11111 } @_silgen_name("_T04hoge1AV1bSivg") func itazura() -> Int { return 22222 } } print(A().b) print(A().itazura())

11111 22222

@swift-4.2.4

struct A { var b: Int { return 11111 } @_silgen_name("_T04hoge1AV1bSivg") func itazura() -> Int { return 22222 } } print(A().b) print(A().itazura())

2:51 AM

手元だとどっちも11111なんだけどな

~/D/swift-asobu $ swift --version Apple Swift version 4.1.2 (swiftlang-902.0.54 clang-902.0.39.2) Target: x86_64-apple-darwin17.7.0 ~/D/swift-asobu $ swift hoge.swift 11111 11111

手元でも同じマングリングになってる？

2:52 AM

マングリングルールはバージョンで結構かわるよ。

手元で同じマングリングなってる

2:53 AM

sil吐かせれば良いのか

2:53 AM

@swift-4.1.3 -emit-sil struct A { var b: Int { return 11111 } }

exit status: 1 with stderr:<unknown>:0: error: option '-emit-sil' is not supported by 'swift'; did you mean to use 'swiftc'?

だめなんだっけ

2:54 AM

swiftcじゃないのか

@swift-4.1.3 -Xfrontend -emit-sil struct A { var b: Int { return 11111 } }

sil_stage canonical import Builtin import Swift import SwiftShims struct A { var b: Int { get } init() } // main sil @main : $@convention(c) (Int32, UnsafeMutablePointer<Optional<UnsafeMutablePointer<Int8>>>) -> Int32 { bb0(%0 : $Int32, %1 : $UnsafeMutablePointer<Optional<UnsafeMutablePointer<Int8>>>): %2 = integer_literal $Builtin.Int32, 0 // user: %3 %3 = struct $Int32 (%2 : $Builtin.Int32) // user: %4 return %3 : $Int32 // id: %4 } // end sil function 'main' // A.b.getter sil hidden @_T04main1AV1bSivg : $@convention(method) (A) -> Int { // %0 // user: %1 bb0(%0 : $A): debug_value %0 : $A, let, name "self", argno 1 // id: %1 %2 = integer_literal $Builtin.Int64, 11111 // user: %3 %3 = struct $Int (%2 : $Builtin.Int64) // user: %4 return %3 : $Int // id: %4 } // end sil function '_T04main1AV1bSivg' // Int.init(_builtinIntegerLiteral:) sil public_external [transparent] [serialized] @_T0S2iBi2048_22_builtinIntegerLiteral_tcfC : $@convention(method) (Builtin.Int2048, @thin Int.Type) -> Int { // %0 // user: %2 bb0(%0 : $Builtin.Int2048, %1 : $@thin Int.Type): %2 = builtin "s_to_s_checked_trunc_Int2048_Int64"(%0 : $Builtin.Int2048) : $(Builtin.Int64, Builtin.Int1) // user: %3 %3 = tuple_extract %2 : $(Builtin.Int64, Builtin.Int1), 0 // user: %4 %4 = struct $Int (%3 : $Builtin.Int64) // user: %5 return %4 : $Int // id: %5 } // end sil function '_T0S2iBi2048_22_builtinIntegerLiteral_tcfC'

@swift-4.1.3 -Xfrontend -emit-sil -module-name hoge struct A { var b: Int { return 11111 } }

2:55 AM

@swift-4.1.3 -Xfrontend -emit-sil -module-name hoge struct A { var b: Int { return 11111 } }

sil_stage canonical import Builtin import Swift import SwiftShims struct A { var b: Int { get } init() } // main sil @main : $@convention(c) (Int32, UnsafeMutablePointer<Optional<UnsafeMutablePointer<Int8>>>) -> Int32 { bb0(%0 : $Int32, %1 : $UnsafeMutablePointer<Optional<UnsafeMutablePointer<Int8>>>): %2 = integer_literal $Builtin.Int32, 0 // user: %3 %3 = struct $Int32 (%2 : $Builtin.Int32) // user: %4 return %3 : $Int32 // id: %4 } // end sil function 'main' // A.b.getter sil hidden @_T04hoge1AV1bSivg : $@convention(method) (A) -> Int { // %0 // user: %1 bb0(%0 : $A): debug_value %0 : $A, let, name "self", argno 1 // id: %1 %2 = integer_literal $Builtin.Int64, 11111 // user: %3 %3 = struct $Int (%2 : $Builtin.Int64) // user: %4 return %3 : $Int // id: %4 } // end sil function '_T04hoge1AV1bSivg' // Int.init(_builtinIntegerLiteral:) sil public_external [transparent] [serialized] @_T0S2iBi2048_22_builtinIntegerLiteral_tcfC : $@convention(method) (Builtin.Int2048, @thin Int.Type) -> Int { // %0 // user: %2 bb0(%0 : $Builtin.Int2048, %1 : $@thin Int.Type): %2 = builtin "s_to_s_checked_trunc_Int2048_Int64"(%0 : $Builtin.Int2048) : $(Builtin.Int64, Builtin.Int1) // user: %3 %3 = tuple_extract %2 : $(Builtin.Int64, Builtin.Int1), 0 // user: %4 %4 = struct $Int (%3 : $Builtin.Int64) // user: %5 return %4 : $Int // id: %5 } // end sil function '_T0S2iBi2048_22_builtinIntegerLiteral_tcfC'

手元と一緒だなあ_T04hoge1AV1bSivg

func itazuraつきでやってみたら (edited)

@swift-4.1.3 -Xfrontend -emit-sil -module-name hoge struct A { var b: Int { return 11111 } func itazura() -> Int { return 22222 } }

sil_stage canonical import Builtin import Swift import SwiftShims struct A { var b: Int { get } func itazura() -> Int init() } // main sil @main : $@convention(c) (Int32, UnsafeMutablePointer<Optional<UnsafeMutablePointer<Int8>>>) -> Int32 { bb0(%0 : $Int32, %1 : $UnsafeMutablePointer<Optional<UnsafeMutablePointer<Int8>>>): %2 = integer_literal $Builtin.Int32, 0 // user: %3 %3 = struct $Int32 (%2 : $Builtin.Int32) // user: %4 return %3 : $Int32 // id: %4 } // end sil function 'main' // A.b.getter sil hidden @_T04hoge1AV1bSivg : $@convention(method) (A) -> Int { // %0 // user: %1 bb0(%0 : $A): debug_value %0 : $A, let, name "self", argno 1 // id: %1 %2 = integer_literal $Builtin.Int64, 11111 // user: %3 %3 = struct $Int (%2 : $Builtin.Int64) // user: %4 return %3 : $Int // id: %4 } // end sil function '_T04hoge1AV1bSivg' // Int.init(_builtinIntegerLiteral:) sil public_external [transparent] [serialized] @_T0S2iBi2048_22_builtinIntegerLiteral_tcfC : $@convention(method) (Builtin.Int2048, @thin Int.Type) -> Int { // %0 // user: %2 bb0(%0 : $Builtin.Int2048, %1 : $@thin Int.Type): %2 = builtin "s_to_s_checked_trunc_Int2048_Int64"(%0 : $Builtin.Int2048) : $(Builtin.Int64, Builtin.Int1) // user: %3 %3 = tuple_extract %2 : $(Builtin.Int64, Builtin.Int1), 0 // user: %4 %4 = struct $Int (%3 : $Builtin.Int64) // user: %5 return %4 : $Int // id: %5 } // end sil function '_T0S2iBi2048_22_builtinIntegerLiteral_tcfC' // A.itazura() sil hidden @_T04hoge1AV7itazuraSiyF : $@convention(method) (A) -> Int { // %0 // user: %1 bb0(%0 : $A): debug_value %0 : $A, let, name "self", argno 1 // id: %1 %2 = integer_literal $Builtin.Int64, 22222 // user: %3 %3 = struct $Int (%2 : $Bu

stdout.txt

https://file.io/cPcDCV

_T04hoge1AV7itazuraSiyF

2:57 AM

↑おや

2:58 AM

ああ、まだあれつけてないのか

@swift-4.1.3 -Xfrontend -emit-sil -module-name hoge struct A { var b: Int { return 11111 } @_silgen_name("_T04hoge1AV1bSivg") func itazura() -> Int { return 22222 } }

exit status: 134 with stderr:

swift: /home/buildnode/jenkins/workspace/oss-swift-4.1-package-linux-ubuntu-16_04/swift/lib/SILGen/SILGen.cpp:638: void swift::Lowering::SILGenModule::preEmitFunction(swift::SILDeclRef, llvm::PointerUnion<ValueDecl *, Expr *>, swift::SILFunction *, swift::SILLocation): Assertion `F->empty() && "already emitted function?!"' failed. #0 0x0000000003f25074 PrintStackTraceSignalHandler(void*) (/usr/bin/swift+0x3f25074) #1 0x0000000003f253b6 SignalHandler(int) (/usr/bin/swift+0x3f253b6) #2 0x00007f19f566b390 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x11390) #3 0x00007f19f3daa428 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x35428) #4 0x00007f19f3dac02a abort (/lib/x86_64-linux-gnu/libc.so.6+0x3702a) #5 0x00007f19f3da2bd7 (/lib/x86_64-linux-gnu/libc.so.6+0x2dbd7) #6 0x00007f19f3da2c82 (/lib/x86_64-linux-gnu/libc.so.6+0x2dc82) #7 0x0000000000c2be2f swift::Lowering::SILGenModule::preEmitFunction(swift::SILDeclRef, llvm::PointerUnion<swift::ValueDecl*, swift::Expr*>, swift::SILFunction*, swift::SILLocation) (/usr/bin/swift+0xc2be2f) #8 0x0000000000c3336f swift::Lowering::SILGenModule::emitFunction(swift::FuncDecl*)::$_1::operator()(swift::SILFunction*) const (/usr/bin/swift+0xc3336f) #9 0x0000000000c2b975 swift::Lowering::SILGenModule::emitFunction(swift::FuncDecl*) (/usr/bin/swift+0xc2b975) #10 0x0000000000ccae75 (anonymous namespace)::SILGenType::emitType() (/usr/bin/swift+0xccae75) #11 0x0000000000ccab98 swift::Lowering::SILGenModule::visitNominalTypeDecl(swift::NominalTypeDecl*) (/usr/bin/swift+0xccab98) #12 0x0000000000c30e6b swift::Lowering::SILGenModule::emitSourceFile(swift::SourceFile*, unsigned int) (/usr/bin/swift+0xc30e6b) #13 0x0000000000c31b36 swift::SILModule::constructSIL(swift::ModuleDecl*, swift::SILOptions&, swift::FileUnit*, llvm::Optional<unsigned int>, bool) (/usr/bin/swift+0xc31b36) #14 0x0000000000c3210d swift::performSILGeneration(swift::ModuleDecl*, swift::SILOptions&, bool) (/usr/bin/swift+0xc3210d) #15 0x

stderr.txt

https://file.io/Y6pmyC

チーン

草

2:58 AM

Assertion `F->empty() && "already emitted function?!"' failed.

ｗ

アサーションで落ちてるから一応安全に死ねてるね

おりこう

ま〜アンダースコア付きのアトリビュートだから、自己責任で、おかしくはないか。

ただ

3:00 AM

@swift-4.1.3

struct A { var b: Int { return 11111 } @_silgen_name("_T04hoge1AV1bSivg") func itazura() -> String { return "Hello" } } print(A().itazura())

Hello

あれ

3:00 AM

手元だとしぬんだがなこれ

3:02 AM

4.1.2と4.1.3でいろいろちがうのかな

まあありえそう

3:04 AM

言語仕様にない部分は結構頻繁に書き換わってるから

だんだんコンパイラの気持ちが分かる人の気持ちが分かるようになってきた

例えばそういうときは

3:05 AM

さっきのアサーションで落ちる行までのスタックトレースをソースを追いかけてみて

3:05 AM

4.1.2 と 4.1.3 のタグでチェックアウトしたり、その辺の git blame を見たりする

3:06 AM

ブレークポイント貼りながらステップ実行していけばなんか違う挙動をする場所が出てくるだろう

こういうのってパッチバージョンの違いとMac/Linuxの違いってどっちが違いうるのかな

Mac/LinuxはObjCがあるかどうかで

C++のところだったら関係ないのかな

3:06 AM

そうよね

これはstructだし名前解決とかだから関係なさそう

ナルホディウス

クラスの場合はデータ構造にも影響あるから

3:07 AM

もしかしたら関係があるかもしれん。

3:07 AM

ああまあでもそうか、SIL stageだからほぼObjCは関係なさそうだね

気持ちが分かる人の気持ちが分かるのはまだ遠いな

~~swift4.2 は@_silgen_name()入れると何故か動かないですね。~~ (edited)

あいや、swift4.2が全く動いていないのか…

4:05 AM

@swift-4.2.4 --version

swift-4.2-DEVELOPMENT-SNAPSHOT-2018-09-07-a以降、動かなくなってる＞ @swift-4.2.4

4:31 AM

Herokuでロールバックした。> @swift-4.2.4 import Foundation print(ProcessInfo.processInfo.environment["SWIFT_VERSION"]!)

4.2-DEVELOPMENT-SNAPSHOT-2018-08-25-a

あ、なるほど、その可能性があったか。

nightlyは動くのに4.2.1-devは動かない。 @swift-main import Foundation print(ProcessInfo.processInfo.environment["SWIFT_VERSION"]!)

DEVELOPMENT-SNAPSHOT-2018-09-08-a

@swift-4.1.3

import Foundation struct Empty: Codable { } struct Foo: Codable { var empty: Empty } struct Bar: Codable { var empty: [Empty] } struct Piyo<E: Codable>: Codable { var empty: E } let encoder = JSONEncoder() let decoder = JSONDecoder() do { print(try decoder.decode(Bar.self, from: encoder.encode(Foo.init(empty: .init())))) } catch { print(error) } do { print(try decoder.decode(Foo.self, from: encoder.encode(Bar.init(empty: .init())))) } catch { print(error) } do { print(try decoder.decode(Piyo<Empty>.self, from: encoder.encode(Piyo<[Empty]>(empty: .init())))) } catch { print(error) } do { print(try decoder.decode(Piyo<[Empty]>.self, from: encoder.encode(Piyo<Empty>(empty: .init())))) } catch { print(error) }

⚠️ [DecodingError.typeMismatch: Value of type 'Array<Any>' required for key 'empty'.] Foo(empty: main.Empty()) Piyo<Empty>(empty: main.Empty()) ⚠️ [DecodingError.typeMismatch: Value of type 'Array<Any>' required for key 'empty'.]

@swift-4.1.3

import Foundation let d1 = Date() let d2 = Date() + 12345 let diff = Calendar.current.dateComponents([.hour, .minute, .second, .nanosecond], from: d1, to: d2) print(String(format: "%02d:%02d:%02d", diff.hour!, diff.minute!, diff.second!) )

(edited)

03:25:45 (edited)

@swift-4.1.3

import Foundation let d1 = Date() let d2 = Date() + 12345 let diff = Calendar.current.dateComponents([.hour, .minute, .second, .nanosecond], from: d1, to: d2) print(String(format: "%02d:%02d:%02d.%d", diff.hour!, diff.minute!, diff.second!, diff.nanosecond!) )

03:25:45.0

@swift-4.1.3

import Foundation let d1 = Date() let d2 = Date() + 12345 let diff = Calendar.current.dateComponents([.year, .month, .day, .hour, .minute, .second, .nanosecond], from: d1, to: d2) print(String(format: "%02d:%02d:%02d.%d", diff.hour!, diff.minute!, diff.second!, diff.nanosecond!) )

exit status: 4 with stderr:

Fatal error: file Foundation/NSCalendar.swift, line 617 #0 0x0000000003f25074 PrintStackTraceSignalHandler(void*) (/usr/bin/swift+0x3f25074) #1 0x0000000003f253b6 SignalHandler(int) (/usr/bin/swift+0x3f253b6) #2 0x00007fe2f1ecd390 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x11390) #3 0x00007fe2ecd880b9 _T0s17_assertionFailures5NeverOs12StaticStringV_SSAE4fileSu4lines6UInt32V5flagstFTf4nxnnn_n (/usr/lib/swift/linux/libswiftCore.so+0x2bb0b9) #4 0x00007fe2ecc1a41c _T0s17_assertionFailures5NeverOs12StaticStringV_SSAE4fileSu4lines6UInt32V5flagstF (/usr/lib/swift/linux/libswiftCore.so+0x14d41c) #5 0x00007fe2e9417056 _T010Foundation10NSCalendarC10componentsAA14DateComponentsVAC4UnitV_AA0D0V4fromAJ2toAC7OptionsV7optionstF (/usr/lib/swift/linux/libFoundation.so+0x3b0056) #6 0x00007fe2e97bac21 _T010Foundation8CalendarV14dateComponentsAA04DateD0Vs3SetVyAC9ComponentOG_AA0E0V4fromAM2totFAfA10NSCalendarCcfU_TA (/usr/lib/swift/linux/libFoundation.so+0x753c21) #7 0x00007fe2e97baa64 _T010Foundation10NSCalendarCAA14DateComponentsVs5Error_pIgxozo_AcEsAF_pIgxrzo_TRTA (/usr/lib/swift/linux/libFoundation.so+0x753a64) #8 0x00007fe2e97c0889 _T010Foundation10NSCalendarCAA14DateComponentsVs5Error_pIgxozo_AcEsAF_pIgxrzo_TRTA.124 (/usr/lib/swift/linux/libFoundation.so+0x759889) #9 0x00007fe2e96f7e29 _T010Foundation14_MutableHandleC3mapqd__qd__xKcKlF (/usr/lib/swift/linux/libFoundation.so+0x690e29) #10 0x00007fe2e97b3e7a _T010Foundation8CalendarV14dateComponentsAA04DateD0Vs3SetVyAC9ComponentOG_AA0E0V4fromAM2totF (/usr/lib/swift/linux/libFoundation.so+0x74ce7a) #11 0x00007fe2f22fd16c #12 0x0000000000fed3be llvm::MCJIT::runFunction(llvm::Function*, llvm::ArrayRef<llvm::GenericValue>) (/usr/bin/swift+0xfed3be) #13 0x0000000000ff1882 llvm::ExecutionEngine::runFunctionAsMain(llvm::Function*, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, st

stderr.txt

https://file.io/N4p5Py

@swift-4.1.3 demangle _T010Foundation10NSCalendarC10componentsAA14DateComponentsVAC4UnitV_AA0D0V4fromAJ2toAC7OptionsV7optionstF

_T010Foundation10NSCalendarC10componentsAA14DateComponentsVAC4UnitV_AA0D0V4fromAJ2toAC7OptionsV7optionstF ---> Foundation.NSCalendar.components(Foundation.NSCalendar.Unit, from: Foundation.Date, to: Foundation.Date, options: Foundation.NSCalendar.Options) -> Foundation.DateComponents

LinuxでDate関連のnanosecond周りはバグだらけ。

@swift-main -swift-version 5

enum Result<Value, Error: Swift.Error> { case success(Value) case failure(Error) func get() throws -> Value { switch self { case .success(let value): return value case .failure(let error): throw error } } } extension Result where Error == Never { func get() -> Value { switch self { case .success(let value): return value } } } let a: Result<Int, Never> = .success(42) print(a.get())

42

swift-4.2-DEVELOPMENT-SNAPSHOT-2018-09-07-a以降でボットが動かない症状、URLSession.dataTask(with:)へ渡したURLRequestのhttpBodyがURLSessionDataTask内部で失われているらしいところまでは把握したのだけれど、最低限の再現条件がわからなくてbugs.swift.orgへ登録できない…

@swift-4.2.4

protocol P1 { associatedtype A1 associatedtype A2 } protocol P2: P1 where A2 == A3 { typealias A3 = A1 } class S: P2 { typealias A1 = Int typealias A2 = A3 }

(edited)

6:27 AM

ありゃ

6:27 AM

@swift-main

protocol P1 { associatedtype A1 associatedtype A2 } protocol P2: P1 where A2 == A3 { typealias A3 = A1 } class S: P2 { typealias A1 = Int typealias A2 = A3 }

exit status: 1 with stderr:

<stdin>:10:7: error: type 'S' does not conform to protocol 'P1' class S: P2 { ^ <stdin>:3:20: note: protocol requires nested type 'A2'; do you want to add it? associatedtype A2 ^ <stdin>:10:7: error: type 'S' does not conform to protocol 'P2' class S: P2 { ^

おっと、動かないバージョンへアップデートされたままでした。動くバージョンへロールバックしました。> @swift-4.2.4 import Foundation print(ProcessInfo.processInfo.environment["SWIFT_VERSION"]!)

1

4.2-DEVELOPMENT-SNAPSHOT-2018-08-25-a

swift-4.2-DEVELOPMENT-SNAPSHOT-2018-09-07-a以降でボットが動かない症状、URLSession.dataTask(with:)へ渡したURLRequestのhttpBodyがURLSessionDataTask内部で失われているらしいところまでは把握したのだけれど、最低限の再現条件がわからなくてbugs.swift.orgへ登録できない…

再現できた。 https://bugs.swift.org/browse/SR-8759

10:24 AM

クッキーを受け取ったドメインに対してURLRequestのhttpBodyが送られなくなるらしい。

swift-corelibs-foundationの不具合を回避して更新しました。> @swift-4.2.4 import Foundation print(ProcessInfo.processInfo.environment["SWIFT_VERSION"]!)

4.2-DEVELOPMENT-SNAPSHOT-2018-09-14-a

@swift-4.2.4 import Foundation print(ProcessInfo.processInfo.environment["SWIFT_VERSION"]!)

4.2-RELEASE

@swift-4.2.4 @swift-4.1.3

protocol P {} protocol Foo {} extension Int: P {} extension Array: Foo where Element: P {} let a = [1,2,3] print(a is Foo)

(edited)

truestderr:<stdin>:8:9: warning: 'is' test is always true print(a is Foo) ^ (edited)

exit status: 134 with stderr:

<stdin>:8:9: warning: 'is' test is always true print(a is Foo) ^ warning: Swift runtime does not yet support dynamically querying conditional conformance ('Swift.Array<Swift.Int>': 'main.Foo') Could not cast value of type 'Swift.Array<Swift.Int>' (0x7f1e0cfb7240) to 'main.Foo' (0x7f1e0cfb7280). #0 0x0000000003f25074 PrintStackTraceSignalHandler(void*) (/usr/bin/swift+0x3f25074) #1 0x0000000003f253b6 SignalHandler(int) (/usr/bin/swift+0x3f253b6) #2 0x00007f1e11cc7390 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x11390) #3 0x00007f1e10406428 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x35428) #4 0x00007f1e1040802a abort (/lib/x86_64-linux-gnu/libc.so.6+0x3702a) #5 0x00007f1e0ce92fd3 (/usr/lib/swift/linux/libswiftCore.so+0x39dfd3) #6 0x00007f1e0ce8f599 (/usr/lib/swift/linux/libswiftCore.so+0x39a599) #7 0x00007f1e0ce8f5eb (/usr/lib/swift/linux/libswiftCore.so+0x39a5eb) #8 0x00007f1e0ce90b38 _dynamicCastToExistential(swift::OpaqueValue*, swift::OpaqueValue*, swift::TargetMetadata<swift::InProcess> const*, swift::TargetExistentialTypeMetadata<swift::InProcess> const*, swift::DynamicCastFlags) (/usr/lib/swift/linux/libswiftCore.so+0x39bb38) #9 0x00007f1e120f624d #10 0x00007f1e120f610e #11 0x0000000000fed3be llvm::MCJIT::runFunction(llvm::Function*, llvm::ArrayRef<llvm::GenericValue>) (/usr/bin/swift+0xfed3be) #12 0x0000000000ff1882 llvm::ExecutionEngine::runFunctionAsMain(llvm::Function*, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&, char const* const*) (/usr/bin/swift+0xff1882) #13 0x00000000004d9076 swift::RunImmediately(swift::CompilerInstance&, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&, swift::IRGenOptions&, swift:

stderr.txt

https://file.io/o6Pj9X

https://github.com/taketo1024/SwiftyMath SwiftyMath を Swift4.2 対応しました

w @Kishikawa Katsumi SwiftBot に組み込んで頂いてたと思うので、よかったら（とても暇なときにでも）アップデートして下さい

taketo1024/SwiftyMath

Pure Math in Pure Swift. Contribute to taketo1024/SwiftyMath development by creating an account on GitHub.

1

Pure Math in Pure Swift.

かっこいい・・・

1

@Taketo Sano そういえば、SwiftyMathはBotだけですけど、BotのバックエンドはWebなので、Webで使えるようにすることもたぶん難しくないのですが、 https://swift-playground.kishikawakatsumi.com/ ^ Webでできたら何かおもしろい利用方法があるとかあります？

おぉ！面白いというよりはとても助かる利用方法として、これを使ってもらいたい人たちが必ずしも Mac ユーザでないので、Web で利用可能になると大変ありがたいです！

たぶんそんな気がしてたんですよね。

コードはこちらですかね

あんまり重い処理を回されては困るというようなことがあれば、自分でホスティングします

https://github.com/kishikawakatsumi/swift-playground

kishikawakatsumi/swift-playground

Contribute to kishikawakatsumi/swift-playground development by creating an account on GitHub.

まあ、タイムアウトもあるんでそんなに心配はしてないですけどね。コードはそれです。 Dockerとかが想定通りになってればそのまま動きます。

了解です！

@Taketo Sano 私のPlaygroundは必要最低限ですけど、うまいことコードとか説明とかUIを作ったら、楽しくインタラクティブに数学を学べる環境になると思うので、もしそういうことをやる場合は手伝うので教えてください。

ありがとうございます、めっちゃ嬉しいです

swift-nightlyボットがビルド出来なくなった修正のついでに、SwiftyMathを使える様にしてみました。 @swift-4.2.4 @swift-main import SwiftyMath let a = 𝐐(4, 5) // 4/5 let b = 𝐐(3, 2) // 3/2 print(a + b) // 23/10

23/10

@swift-4.2.4 Int(Double(Int.max))

exit status: 4 with stderr:

<stdin>:1:1: warning: result of 'Int' initializer is unused Int(Double(Int.max)) ^ ~~~~~~~~~~~~~~~~~ Fatal error: Double value cannot be converted to Int because the result would be greater than Int.max Current stack trace: 0 libswiftCore.so 0x00007f5ca0e9ff30 _swift_stdlib_reportFatalError + 168 1 libswiftCore.so 0x00007f5ca0bf7c6a <unavailable> + 1502314 2 libswiftCore.so 0x00007f5ca0e3515e <unavailable> + 3850590 3 libswiftCore.so 0x00007f5ca0bf7c6a <unavailable> + 1502314 4 libswiftCore.so 0x00007f5ca0d90059 <unavailable> + 3174489 5 libswiftCore.so 0x00007f5ca0bf7730 _fatalErrorMessage(_:_:file:line:flags:) + 19 7 swift 0x0000000001042d2e <unavailable> + 12856622 8 swift 0x0000000001046e52 <unavailable> + 12873298 9 swift 0x00000000004f8b52 <unavailable> + 1018706 10 swift 0x00000000004df0cb <unavailable> + 913611 11 swift 0x00000000004da400 <unavailable> + 893952 12 swift 0x000000000048a348 <unavailable> + 566088 13 libc.so.6 0x00007f5ca3833740 __libc_start_main + 240 14 swift 0x0000000000488009 <unavailable> + 557065 #0 0x0000000004108b64 PrintStackTraceSignalHandler(void*) (/usr/bin/swift+0x4108b64) #1 0x00000000041069f2 llvm::sys::RunSignalHandlers() (/usr/bin/swift+0x41069f2) #2 0x0000000004108d12 SignalHandler(int) (/usr/bin/swift+0x4108d12) #3 0x00007f5ca5109390 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x11390) #4 0x00007f5ca0d90061 $Ss18_fatalErrorMessage__4file4line5flagss5NeverOs12StaticStringV_A2HSus6UInt32VtFTf4nnddn_n (/usr/lib/swift/linux/libswiftCore.so+0x307061) #5 0x00007f5ca0bf7743 $Ss18_fatalErrorMessage__4file4line5flagss5Ne

stderr.txt

https://file.io/JQdJJv

これはしょうがないのか？

Double value cannot be converted to Int because the result would be greater than Int.max

Double のビット数考えればしょうがないか。

@swift-4.2.4 Int(Float(Int.max) * 2)

exit status: 4 with stderr:

<stdin>:1:1: warning: result of 'Int' initializer is unused Int(Float(Int.max) * 2) ^ ~~~~~~~~~~~~~~~~~~~~ Fatal error: Float value cannot be converted to Int because the result would be greater than Int.max Current stack trace: 0 libswiftCore.so 0x00007fe934031f30 _swift_stdlib_reportFatalError + 168 1 libswiftCore.so 0x00007fe933d89c6a <unavailable> + 1502314 2 libswiftCore.so 0x00007fe933fc715e <unavailable> + 3850590 3 libswiftCore.so 0x00007fe933d89c6a <unavailable> + 1502314 4 libswiftCore.so 0x00007fe933f22059 <unavailable> + 3174489 5 libswiftCore.so 0x00007fe933d89730 _fatalErrorMessage(_:_:file:line:flags:) + 19 7 swift 0x0000000001042d2e <unavailable> + 12856622 8 swift 0x0000000001046e52 <unavailable> + 12873298 9 swift 0x00000000004f8b52 <unavailable> + 1018706 10 swift 0x00000000004df0cb <unavailable> + 913611 11 swift 0x00000000004da400 <unavailable> + 893952 12 swift 0x000000000048a348 <unavailable> + 566088 13 libc.so.6 0x00007fe9369c5740 __libc_start_main + 240 14 swift 0x0000000000488009 <unavailable> + 557065 #0 0x0000000004108b64 PrintStackTraceSignalHandler(void*) (/usr/bin/swift+0x4108b64) #1 0x00000000041069f2 llvm::sys::RunSignalHandlers() (/usr/bin/swift+0x41069f2) #2 0x0000000004108d12 SignalHandler(int) (/usr/bin/swift+0x4108d12) #3 0x00007fe93829b390 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x11390) #4 0x00007fe933f22061 $Ss18_fatalErrorMessage__4file4line5flagss5NeverOs12StaticStringV_A2HSus6UInt32VtFTf4nnddn_n (/usr/lib/swift/linux/libswiftCore.so+0x307061) #5 0x00007fe933d89743 $Ss18_fatalErrorMessage__4file4line5flag

stderr.txt

https://file.io/yu1mQr

なるほど

@swift-4.2.4 print(Int(Float80(Int.max))) (edited)

9223372036854775807 (edited)

1

一方で・・・ @swift-4.2.4 print(Int(Double(Int.min))) (edited)

-9223372036854775808 (edited)

丸め方向によるランダム的挙動。

あれ？

8:47 AM

Doubleで精度不足になったときに

8:47 AM

@swift-4.2.4 print(Int.min) print(Int(Double(Int.min)))

-9223372036854775808 -9223372036854775808

あ〜

8:49 AM

@swift-4.2.4 import Foundation print(String(format: "%x", Int.min)) (edited)

0 (edited)

？

↓これはどうなってんだ？？ // Kotlin fun main(args: Array<String>) { println(Long.MAX_VALUE) println(Long.MAX_VALUE.toDouble().toLong()) } 9223372036854775807 9223372036854775807 (edited)

@swift-4.2.4 import Foundation print(String(format: "%lx", Int.min))

8000000000000000

負の最大数は 0b10000.... ってパターンだから、

8:51 AM

いや、ちがうか、仮数部に入るのは絶対値か

8:52 AM

@swift-4.2.4 import Foundation let x: Int128 = abs(Int128(Int.min)) print(String(format: "%llx", x))

exit status: 1 with stderr:<stdin>:2:8: error: use of undeclared type 'Int128' let x: Int128 = abs(Int128(Int.min)) ^~~~~~

う

Kotlin のは、単に max 超えてるのは全部 max に丸められるだけだった。

8:55 AM

Long → Int とかと同じで上位ビット切り捨てかと思ってた。 (edited)

Double のビット数考えればしょうがないか。 変換できないのが？クラッシュするのが？

ビット数により精度を保てないが故にオーバーフローしてクラッシュするのが、ですね。

Int.min だとクラッシュしないのが微妙ですね。丸め方向の偶然に挙動が委ねられてる感が。

@swift-4.2.4 -frontend -repl Int(exactly: Double(Int.max)) (edited)

// r0 : Int? = nil (edited)

exactlyだと、だめなときはnilか。

@swift-4.2.4 protocol P { func foo() -> Int } struct S: P { @_implements(P, foo()) func bar() -> Int { return 1 } }

no output

@_implements初めて知った

1

悪いことできそう

1

@swift-4.2.4 @swift-main

struct X {} protocol P1 { associatedtype U } protocol P2: P1 {} extension P2 { @_implements(P1, U) typealias _Default_U = X } struct S<A>: P2 {} extension S where A: P1 { typealias U = A.U }

(edited)

exit status: 134 with stderr:

error type should not appear in IRGen UNREACHABLE executed at /home/buildnode/jenkins/workspace/oss-swift-4.2-package-linux-ubuntu-16_04/swift/lib/IRGen/MetadataRequest.cpp:1258! #0 0x000000000410afb4 PrintStackTraceSignalHandler(void*) (/usr/bin/swift+0x410afb4) #1 0x0000000004108e42 llvm::sys::RunSignalHandlers() (/usr/bin/swift+0x4108e42) #2 0x000000000410b162 SignalHandler(int) (/usr/bin/swift+0x410b162) #3 0x00007f943313c390 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x11390) #4 0x00007f943187b428 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x35428) #5 0x00007f943187d02a abort (/lib/x86_64-linux-gnu/libc.so.6+0x3702a) #6 0x00000000040a3f4d llvm::llvm_unreachable_internal(char const*, char const*, unsigned int) (/usr/bin/swift+0x40a3f4d) #7 0x0000000000631e17 swift::CanTypeVisitor<(anonymous namespace)::EmitTypeMetadataRef, swift::irgen::MetadataResponse, swift::irgen::DynamicMetadataRequest>::visit(swift::CanType, swift::irgen::DynamicMetadataRequest) (/usr/bin/swift+0x631e17) #8 0x0000000000634708 swift::irgen::MetadataResponse llvm::function_ref<swift::irgen::MetadataResponse (swift::irgen::IRGenFunction&, swift::irgen::DynamicMetadataRequest, llvm::Constant*)>::callback_fn<swift::irgen::getTypeMetadataAccessFunction(swift::irgen::IRGenModule&, swift::CanType, swift::ForDefinition_t)::$_2>(long, swift::irgen::IRGenFunction&, swift::irgen::DynamicMetadataRequest, llvm::Constant*) (/usr/bin/swift+0x634708) #9 0x0000000000634566 swift::irgen::MetadataResponse llvm::function_ref<swift::irgen::MetadataResponse (swift::irgen::IRGenFunction&, swift::irgen::Explosion&)>::callback_fn<swift::irgen::getTypeMetadataAccessFunction(swift::irgen::IRGenModule&, swift::CanType, swift::ForDefinition_t, llvm::function_ref<swift::irgen::MetadataResponse (swift::irgen::IRGenFunction&, swift::irgen::DynamicMetadataRequest, llvm::Constant*)>)::$_1>(long, swift::irgen::IRGenFunction&, swift::irgen::Explosion&) (/usr/bin/swift+0x634566) #10 0

(edited)

stderr.txt

https://file.io/F2TsEj

exit status: 134 with stderr:

error type should not appear in IRGen UNREACHABLE executed at /home/buildnode/jenkins/workspace/oss-swift-package-linux-ubuntu-16_04/swift/lib/IRGen/MetadataRequest.cpp:1230! Stack dump: 0. Program arguments: /usr/bin/swift -frontend -interpret - -disable-objc-interop -I /Libraries/.build/x86_64-unknown-linux/debug -I /Libraries/.build/checkouts/swift-nio-b68c973e/Sources/CNIOZlib/include -I /Libraries/.build/checkouts/swift-nio-b68c973e/Sources/CNIOHTTPParser/include -I /Libraries/.build/checkouts/swift-nio-ssl-93eb7dfa/Sources/CNIOOpenSSL/include -I /Libraries/.build/checkouts/crypto-36ec1aea/Sources/libbcrypt/include -I /Libraries/.build/checkouts/swift-nio-b68c973e/Sources/CNIOSHA1/include -I /Libraries/.build/checkouts/swift-nio-b68c973e/Sources/CNIOAtomics/include -I /Libraries/.build/checkouts/swift-nio-b68c973e/Sources/CNIODarwin/include -I /Libraries/.build/checkouts/swift-nio-b68c973e/Sources/CNIOLinux/include -I /Libraries/.build/checkouts/SwiftBacktrace-fcbf89ea/Sources/CSwiftBacktrace/include -I /Libraries/.build/checkouts/SwiftBacktrace-fcbf89ea/Sources/Clibunwind/include -module-cache-path /Libraries/.build/x86_64-unknown-linux/debug/ModuleCache -D DEBUG -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOZlib.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOHTTPParser.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOOpenSSL.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/checkouts/swift-nio-ssl-support-a3e27b6f/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/checkouts/crypto-36ec1aea/Sources/libbcrypt/include/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOSHA1.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOAtomics.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown

stderr.txt

https://file.io/auV1k2

@swift-4.2.4 var iterator = [1].enumerated().makeIterator() _ = iterator.next()

no output

@swift-4.2.4 var a = AnyCollection([1,2,3]) let idxs = a.indices print(idxs)

DefaultIndices<AnyCollection<Int>>(_elements: Swift.AnyCollection<Swift.Int>(_box: Swift._RandomAccessCollectionBox<Swift.Array<Swift.Int>>), _startIndex: (), _endIndex: ())

stderr:

warning: the Swift runtime was unable to demangle the type of field '_startIndex'. the mangled type name is '5IndexSlQz'. this field will show up as an empty tuple in Mirrors warning: the Swift runtime was unable to demangle the type of field '_endIndex'. the mangled type name is '5IndexSlQz'. this field will show up as an empty tuple in Mirrors

@swift-4.2.4 @swift-main protocol P {} extension P { typealias Concrete = S } struct S : P {} let a: P = .Concrete.self print(a)

exit status: 134 with stderr:

swift: /home/buildnode/jenkins/workspace/oss-swift-4.2-package-linux-ubuntu-16_04/llvm/include/llvm/Support/Casting.h:255: typename cast_retty<X, Y *>::ret_type llvm::cast(Y *) [X = swift::MetatypeType, Y = swift::TypeBase]: Assertion `isa<X>(Val) && "cast<Ty>() argument of incompatible type!"' failed. #0 0x000000000410b054 PrintStackTraceSignalHandler(void*) (/usr/bin/swift+0x410b054) #1 0x0000000004108ee2 llvm::sys::RunSignalHandlers() (/usr/bin/swift+0x4108ee2) #2 0x000000000410b202 SignalHandler(int) (/usr/bin/swift+0x410b202) #3 0x00007f045adde390 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x11390) #4 0x00007f045951d428 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x35428) #5 0x00007f045951f02a abort (/lib/x86_64-linux-gnu/libc.so.6+0x3702a) #6 0x00007f0459515bd7 (/lib/x86_64-linux-gnu/libc.so.6+0x2dbd7) #7 0x00007f0459515c82 (/lib/x86_64-linux-gnu/libc.so.6+0x2dc82) #8 0x0000000000c7225a swift::Lowering::SILGenBuilder::createMetatype(swift::SILLocation, swift::SILType) (/usr/bin/swift+0xc7225a) #9 0x0000000000cafec9 swift::ASTVisitor<(anonymous namespace)::RValueEmitter, swift::Lowering::RValue, void, void, void, void, void, swift::Lowering::SGFContext>::visit(swift::Expr*, swift::Lowering::SGFContext) (/usr/bin/swift+0xcafec9) #10 0x0000000000ca2c28 swift::Lowering::SILGenFunction::emitRValueAsSingleValue(swift::Expr*, swift::Lowering::SGFContext) (/usr/bin/swift+0xca2c28) #11 0x0000000000cbdfdf swift::Lowering::ManagedValue llvm::function_ref<swift::Lowering::ManagedValue (swift::Lowering::SGFContext)>::callback_fn<(anonymous namespace)::RValueEmitter::visitErasureExpr(swift::ErasureExpr*, swift::Lowering::SGFContext)::$_8>(long, swift::Lowering::SGFContext) (/usr/bin/swift+0xcbdfdf) #12 0x0000000000c8a59a std::_Function_handler<void (swift::SILValue), swift::Lowering::SILGenFunction::emitExistentialErasure(swift::SILLocation, swift::CanType, swift::Lowering::TypeLowering const&, swift::Lowering::TypeLowering const&,

stderr.txt

https://file.io/q3szV0

exit status: 1 with stderr:<stdin>:7:13: error: type of expression is ambiguous without more context let a: P = .Concrete.self ~^~~~~~~~

@swift-4.2.4 @swift-main protocol P {} extension P { typealias Concrete = S } struct S : P {} let a: P = .Concrete() print(a)

exit status: 1 with stderr:<stdin>:7:13: error: member 'Concrete' is not a function let a: P = .Concrete() ^ ~~

S()

↑なんかすごい変なバグ発見したと思ったけどなんとなく直ってた。

その謎のドット何・・・

左辺の型のstaticメソッドとかは省略できるやつでは

なるほど。

ちなみに最初のほうのやつは、Xcode10 の Swift4.2 だとコンパイルも実行も通ってしまいます。

@swift-4.2.4

protocol Hoge { associatedtype Fuga func piyo(_ index: Int) -> Fuga } extension Array: Hoge where Element == String { typealias Fuga = String func piyo(_ index: Int) -> Fuga { return self[index] } } extension Array: Hoge where Element == Int { typealias Fuga = Int func piyo(_ index: Int) -> Fuga { return self[index] } }

(edited)

exit status: 1 with stderr:

<stdin>:15:13: error: invalid redeclaration of 'Fuga' typealias Fuga = Int ^ <stdin>:8:13: note: 'Fuga' previously declared here typealias Fuga = String ^ <stdin>:9:30: error: 'Fuga' is ambiguous for type lookup in this context func piyo(_ index: Int) -> Fuga { ^~~~ <stdin>:8:13: note: found this candidate typealias Fuga = String ^ <stdin>:15:13: note: found this candidate typealias Fuga = Int ^ <stdin>:16:30: error: 'Fuga' is ambiguous for type lookup in this context func piyo(_ index: Int) -> Fuga { ^~~~ <stdin>:8:13: note: found this candidate typealias Fuga = String ^ <stdin>:15:13: note: found this candidate typealias Fuga = Int ^ <stdin>:7:1: error: type 'Array<Element>' does not conform to protocol 'Hoge' extension Array: Hoge where Element == String { ^ <stdin>:2:18: note: multiple matching types named 'Fuga' associatedtype Fuga ^ <stdin>:8:13: note: possibly intended match typealias Fuga = String ^ <stdin>:15:13: note: possibly intended match typealias Fuga = Int ^ <stdin>:14:18: error: conflicting conformance of 'Array<Element>' to protocol 'Hoge'; there cannot be more than one conformance, even with different conditional bounds extension Array: Hoge where Element == Int { ^ <stdin>:7:1: note: 'Array<Element>' declares conformance to protocol 'Hoge' here extension Array: Hoge where Element == String { ^

(edited)

なるほど

8:10 AM

@swift-4.2.4

protocol Hoge { associatedtype Fuga func piyo(_ index: Int) -> Fuga } extension Array: Hoge where Element == String { typealias Fuga = String func piyo(_ index: Int) -> String { return self[index] + "でーす" } } extension Array: Hoge where Element == Int { typealias Fuga = Int func piyo(_ index: Int) -> Int { return self[index] + 10 } }

exit status: 1 with stderr:

<stdin>:15:13: error: invalid redeclaration of 'Fuga' typealias Fuga = Int ^ <stdin>:8:13: note: 'Fuga' previously declared here typealias Fuga = String ^ <stdin>:7:1: error: type 'Array<Element>' does not conform to protocol 'Hoge' extension Array: Hoge where Element == String { ^ <stdin>:2:18: note: multiple matching types named 'Fuga' associatedtype Fuga ^ <stdin>:8:13: note: possibly intended match typealias Fuga = String ^ <stdin>:15:13: note: possibly intended match typealias Fuga = Int ^ <stdin>:14:18: error: conflicting conformance of 'Array<Element>' to protocol 'Hoge'; there cannot be more than one conformance, even with different conditional bounds extension Array: Hoge where Element == Int { ^ <stdin>:7:1: note: 'Array<Element>' declares conformance to protocol 'Hoge' here extension Array: Hoge where Element == String { ^

@swift-main -frontend -repl

class Animal {} class Cat<T>: Animal {} func foo(_: Animal) { print("Animal") } func foo<T>(_: Cat<T>) { print("Cat") } let cat = Cat<Int>() :constraints debug on foo(cat)

exit status: 11 with stderr:

Stack dump: 0. Program arguments: swift -frontend -I /Libraries/.build/x86_64-unknown-linux/debug -L /Libraries/.build/x86_64-unknown-linux/debug -lLibraries -DDEBUG -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOZlib.build/module.modulemap -I /Libraries/.build/checkouts/swift-nio-b68c973e/Sources/CNIOZlib/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOHTTPParser.build/module.modulemap -I /Libraries/.build/checkouts/swift-nio-b68c973e/Sources/CNIOHTTPParser/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOOpenSSL.build/module.modulemap -I /Libraries/.build/checkouts/swift-nio-ssl-93eb7dfa/Sources/CNIOOpenSSL/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CCryptoOpenSSL.build/module.modulemap -I /Libraries/.build/checkouts/crypto-36ec1aea/Sources/CCryptoOpenSSL/include -Xcc -fmodule-map-file=/Libraries/.build/checkouts/crypto-36ec1aea/Sources/CBcrypt/include/module.modulemap -I /Libraries/.build/checkouts/crypto-36ec1aea/Sources/CBcrypt/include -Xcc -fmodule-map-file=/Libraries/.build/checkouts/crypto-36ec1aea/Sources/CBase32/include/module.modulemap -I /Libraries/.build/checkouts/crypto-36ec1aea/Sources/CBase32/include -Xcc -fmodule-map-file=/Libraries/.build/checkouts/swift-nio-ssl-support-a3e27b6f/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOSHA1.build/module.modulemap -I /Libraries/.build/checkouts/swift-nio-b68c973e/Sources/CNIOSHA1/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOAtomics.build/module.modulemap -I /Libraries/.build/checkouts/swift-nio-b68c973e/Sources/CNIOAtomics/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIODarwin.build/module.modulemap -I /Libraries/.build/checkouts/swift-nio-b68c973e/Sources/CNIODarwin/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOLinu

stderr.txt

https://file.io/i9VGqr

むう、nightlyがLLVMSymbolizerでエラーになるな。

2:39 PM

1. while processing REPL source: class Animal {} [0mLLVMSymbolizer: error reading file: No such file or directory. LLVMSymbolizer: error reading file: No such file or directory. LLVMSymbolizer: error reading file: No such file or directory. #0 0x000000000459a4b4 (swift+0x459a4b4) #1 0x0000000004598280 (swift+0x4598280) #2 0x000000000459a662 (swift+0x459a662) #3 0x00007f494a31e390 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x11390) #4 0x00007f494a74e000

@swift-4.2.4 -frontend -repl

class Animal {} class Cat<T>: Animal {} func foo(_: Animal) { print("Animal") } func foo<T>(_: Cat<T>) { print("Cat") } let cat = Cat<Int>() :constraints debug on foo(cat)

(edited)

// cat : Cat<Int> = REPL.Cat<Swift.Int> Animalstderr:

---Constraint solving for the expression at [<REPL Input>:1:1 - line:1:8]--- (overload set choice binding $T1 := Cat<Int>) ---Initial constraints for the given expression--- (call_expr type='()' location=<REPL Input>:1:1 range=[<REPL Input>:1:1 - line:1:8] arg_labels=_: (overloaded_decl_ref_expr type='$T0' location=<REPL Input>:1:1 range=[<REPL Input>:1:1 - line:1:1] name=foo number_of_decls=2 function_ref=single decls=[ REPL.(file).foo@<REPL Input>:1:6, REPL.(file).foo@<REPL Input>:1:6]) (paren_expr type='(Cat<Int>)' location=<REPL Input>:1:5 range=[<REPL Input>:1:4 - line:1:8] (declref_expr type='Cat<Int>' location=<REPL Input>:1:5 range=[<REPL Input>:1:5 - line:1:5] decl=REPL.(file).cat@<REPL Input>:1:5 direct_to_storage function_ref=unapplied))) Score: 0 0 0 0 0 0 0 0 0 0 0 Type Variables: $T0 [lvalue allowed] subtype_of_existential involves_type_vars bindings={} @ locator@0x81d2e10 [OverloadedDeclRef@<REPL Input>:1:1] $T1 [lvalue allowed] as Cat<Int> @ locator@0x81d2f60 [DeclRef@<REPL Input>:1:5] Active Constraints: Inactive Constraints: disjunction [[locator@0x81d2e10 [OverloadedDeclRef@<REPL Input>:1:1]]]:$T0 bound to decl REPL.(file).foo@<REPL Input>:1:6 : (Animal) -> () at <REPL Input>:1:6 [[locator@0x81d2e10 [OverloadedDeclRef@<REPL Input>:1:1]]]; or $T0 bound to decl REPL.(file).foo@<REPL Input>:1:6 : <T> (Cat<T>) -> () at <REPL Input>:1:6 [[locator@0x81d2e10 [OverloadedDeclRef@<REPL Input>:1:1]]]; (Cat<Int>) -> () applicable fn $T0 [[locator@0x81d2fe0 [Call@<REPL Input>:1:1 -> apply function]]]; Resolved overloads: selected overload set choice cat: $T1 == Cat<Int> (assuming $T0 bound to decl REPL.(file).foo@<REPL Input>:1:6 : (Animal) -> () at <REPL Input>:1:6 [[locator@0x81d2e10 [OverloadedDeclRef@<REPL Input>:1:1]]]; (overload set choice binding $T0 := (Animal) -> ()) (found solution 0 0 0 0 0 0 0 0 0 0 0) ) (assuming $T0 bound to decl REPL.(file).

(edited)

stderr.txt

https://ptpb.pw/8gvL.txt/text

Discordのメッセージサイズに収まらない出力のアップロード先を https://file.io から https://ptpb.pw へ変更しました。 (edited)

3:18 PM

file.ioは一度urlへアクセスすると削除されてしまうサービスでしたが、ptpb.pwでは削除されません。

3:20 PM

https://ptpb.pw/8gvL.txt/text#L-17 の様に各行へのリンクも貼れるので、共有しやすくなったかも？ (edited)

4

@swift-4.2.4

var f: (() -> Void)? class Cat { deinit { f?() } } func main() { let cat = Cat() f = { [weak cat] in print(cat == nil) // true } } main()

(edited)

exit status: 2 with stderr:error: unable to invoke subcommand: /usr/bin/swift-swift (No such file or directory) ```

@swift-4.2.4

var f: (() -> Void)? class Cat { deinit { f?() } } func main() { let cat = Cat() f = { [weak cat] in print(cat == nil) // true } } main()

true

deinit中のオブジェクトはweakから見るとnil

@swiftbot

class A { typealias Aliased = String } class B : A { typealias Aliased = Double } let str: String.Type = B.Aliased.self let dbl: Double.Type = B.Aliased.self print(str) print(dbl)

1

rintaro

class A { typealias Aliased = String } class B : A { typealias Aliased = Double } let str: String.Type = B.Aliased.self let dbl: Double.Type = B.Aliased.self print(str) print(dbl)

Version:

swift-4.1.1-RELEASE

Output:

String Double

Error:

？？

8:32 AM

どう理解すればいいんだ・・・

オーバーロードといっていいのか・・・

B.Aliased と A.Aliased が B.Aliased という式でオーバーロード？されてる？

8:34 AM

そもそもA.AliasedをBで変更するのだと思っていました

B.Aliased を型推論させると当然のように Double に解決されるんですけどね。

@swiftbot

class A { typealias Aliased = String } class B : A { typealias Aliased = Double } let a: A.Type = B.self print(a.Aliased.self)

1

omochimetaru

class A { typealias Aliased = String } class B : A { typealias Aliased = Double } let a: A.Type = B.self print(a.Aliased.self)

Version:

swift-4.1.1-RELEASE

Output:

String

Error:

静的に別スコープなのか〜

assoctype付けるとA.Aliasedが見えなくなるあたりfuncのオーバーロードと似てる？

typealiasじゃなくてassoctype？

(さっきできてたのが再現できないので確認中……)

似たようなの作れた。 @swift-4.2.4

protocol P { static var Aliased: String.Type { get } } extension P { static var Aliased: String.Type { return String.self } } class A: P {} class B: A { static var Aliased: Double.Type { return Double.self } } let str: String.Type = B.Aliased.self let dbl: Double.Type = B.Aliased.self print(str) print(dbl)

String Double

なるほど・・・

8:55 AM

@swift-4.2.4

protocol P { static var value: Int { get } } extension P { static var value: Int { return 3 } } protocol Q { static var value: Bool { get } } extension Q { static var value: Bool { return true } } class A : P { } class B : A, Q { } class C : B { static var value: String = "str" } let a: Int = C.value let b: Bool = C.value let c: String = C.value print(a, b, c)

3 true str

プロトコル使ったら普通にプロパティオーバーロードできた。 @swift-4.2.4

protocol P { var a: Int { get } } extension P { var a: Int { return 42 } } protocol Q { var a: Bool { get } } extension Q { var a: Bool { return true } } struct S: P, Q {} let s = S() let x: Int = s.a let y: Bool = s.a print(x) print(y)

42 true

うーん、これがありなら普通にプロパティオーバーロードとかジェネリックプロパティとかできてもいい気も？ subscript もできるんだし。

9:05 AM

それとも意図せずにプロパティオーバーロードができてしまってる？

PとQの var a の型が一緒だとエラーになるし、 PとQを使わずにSに直接2つ書いてもエラーになるし

9:06 AM

裏技感がある (edited)

@swift-4.2.4

protocol P { var a: Int { get set } } extension P { var a: Int { get { return 42 } set {} } } protocol Q { var a: Bool { get set } } extension Q { var a: Bool { get { return true } set {} } } struct S: P, Q {} var s = S() s.a = true as Bool

(edited)

no output (edited)

lvalue としてうまく機能しないので、中途半端ですね。

マジかっ

あ、let だからか？

あ。

ぉ、うごいた。

おおお・・・

@swift-4.2.4 -O

struct RGBA<Channel> { var red: Channel var green: Channel var blue: Channel var alpha: Channel } let rgbaArray = [RGBA(red: 255, green: 127, blue: 0, alpha: 255)] rgbaArray.withUnsafeBufferPointer { rgbaPointer in print(rgbaPointer[0]) rgbaPointer.withMemoryRebound(to: UInt8.self) { uint8Pointer in print(uint8Pointer[0]) } }

(edited)

1

rintaro

struct RGBA<Channel> { var red: Channel var green: Channel var blue: Channel var alpha: Channel } let rgbaArray = [RGBA(red: 255, green: 127, blue: 0, alpha: 255)] rgbaArray.withUnsafeBufferPointer { rgbaPointer in print(rgbaPointer[0]) rgbaPointer.withMemoryRebound(to: UInt8.self) { uint8Pointer in print(uint8Pointer[0]) } }

Version:

swift-4.1.1-RELEASE

Output:

Error:

Fatal error: Current stack trace: 0 libswiftCore.so 0x00007f1674d19750 _swift_stdlib_reportFatalError + 171 1 libswiftCore.so 0x00007f1674a87ad6 <unavailable> + 1366742 2 libswiftCore.so 0x00007f1674cc2383 <unavailable> + 3703683 3 libswiftCore.so 0x00007f1674a87ad6 <unavailable> + 1366742 4 libswiftCore.so 0x00007f1674bf3d80 <unavailable> + 2858368 5 libswiftCore.so 0x00007f1674bbbded <unavailable> + 2629101 6 libswiftCore.so 0x00007f1674bbbc20 UnsafeBufferPointer.withMemoryRebound<A, B>(to:_:) + 42 10 libswiftCore.so 0x00007f1674a81e30 Array.withUnsafeBufferPointer<A>(_:) + 172 12 swift 0x0000000000fed1ce <unavailable> + 12505550 13 swift 0x0000000000ff1692 <unavailable> + 12523154 ...

9:24 AM

stderr-4.1.1.txt

2.36 KB

RGBA<Int>(red: 255, green: 127, blue: 0, alpha: 255) 255

-O だと通ると。

ええっ！

https://discordapp.com/channels/291054398077927425/291054454793306112/499480778993041411 の様に、ボットへのメンションとコードブロックの始点が同じ行に在っても、正しく解釈する様にしました。また、コードブロックの始点と終点が行頭になくても認識する様にしました。 @swift-4.2.4 print("hello")

hello

お！それミスしがちだったので助かります、ありがとうございます

1

@swift-4.2.4

struct Stone { var x: Int { get { return 1 } _modify { var x: Int = 3 yield &x y = x } } var y: Int = 0 } func mod(_ x: inout Int) { x = 8 } func main() { var a = Stone() mod(&a.x) print(a.y) } main()

exit status: 1 with stderr:

<stdin>:7:9: error: expected 'get', 'set', 'willSet', or 'didSet' keyword to start an accessor definition _modify { ^ <stdin>:23:9: error: cannot pass immutable value as inout argument: 'x' is a get-only property mod(&a.x) ^~~~

@swift-main

struct Stone { var x: Int { get { return 1 } _modify { var x: Int = 3 yield &x y = x } } var y: Int = 0 } func mod(_ x: inout Int) { x = 8 } func main() { var a = Stone() mod(&a.x) print(a.y) } main()

8

@swift-4.2.4 print("hello world") (edited)

hello world (edited)

@swift-4.2.4 @swift-4.1.3 -Onone

import Foundation import SwiftBacktrace enablePrettyStackTrace() let group = DispatchGroup() var array = [Int]() DispatchQueue.global().async(group: group) { for i in 0...1000000 { array.append(i) } print("end 1: \(array.count)") } DispatchQueue.global().async(group: group) { for i in 0...1000000 { array.append(i) } print("end 2: \(array.count)") } group.wait()

exit status: 11 with stderr:

/Libraries/.build/x86_64-unknown-linux/debug/libLibraries.so(callStackSymbols<A>(_:transform:)+0x9f) [0x00007ff40d7e71bf] /Libraries/.build/x86_64-unknown-linux/debug/libLibraries.so(backtrace(_:formatter:)+0x102) [0x00007ff40d7e6cd2] /Libraries/.build/x86_64-unknown-linux/debug/libLibraries.so(closure #1 in closure #1 in variable initialization expression of _enablePrettyStackTrace+0x2f) [0x00007ff40d7ebc5f] /Libraries/.build/x86_64-unknown-linux/debug/libLibraries.so(runSignalHandlers()+0x34d) [0x00007ff40d7edbcd] /Libraries/.build/x86_64-unknown-linux/debug/libLibraries.so(signalHandler(signal:)+0x1c4) [0x00007ff40d7ed3a4] /Libraries/.build/x86_64-unknown-linux/debug/libLibraries.so(@objc signalHandler(signal:)+0x9) [0x00007ff40d7ed1d9] /lib/x86_64-linux-gnu/libpthread.so.0(__restore_rt+0x0) [0x00007ff4150c5390] /lib/x86_64-linux-gnu/libc.so.6(strerror_l+0x500) [0x00007ff41386e870] /usr/lib/swift/linux/libswiftSwiftOnoneSupport.so(specialized _ArrayBufferProtocol._arrayOutOfPlaceUpdate<A>(_:_:_:_:)+0x16d) [0x00007ff40cd688cd] /usr/lib/swift/linux/libswiftSwiftOnoneSupport.so(specialized Array._copyToNewBuffer(oldCount:)+0x3f) [0x00007ff40cd5fbef] /usr/lib/swift/linux/libswiftSwiftOnoneSupport.so(specialized Array._copyToNewBuffer(oldCount:)+0x25) [0x00007ff40cd5ffa5] /usr/lib/swift/linux/libswiftSwiftOnoneSupport.so(specialized Array.append(_:)+0x78) [0x00007ff40cd5e7c8] /usr/lib/swift/linux/libswiftSwiftOnoneSupport.so(specialized Array.append(_:)+0x10) [0x00007ff40cd5e740] -(+0x0) [0x00007ff4154f57b8] -(+0x0) [0x00007ff4154f55f7] /usr/lib/swift/linux/libdispatch.so(_dispatch_call_block_and_release+0x7) [0x00007ff40cfd48c7] -(+0x0) [0x00007ff4154f57ae]#0 0x000000000410b054 PrintStackTraceSignalHandler(void*) (/usr/bin/swift+0x410b054) #1 0x0000000004108ee2 llvm::sys::RunSignalHandlers() (/usr/bin/swift+0x4108ee2) #2 0x000000000410b202 SignalHandler(int) (/usr/bin/swift+0x410b202) #3 0x00007ff4150c5390 __restore_rt (/lib/x86_64-

stderr.txt

https://ptpb.pw/4scS.txt/text

exit status: 4 with stderr:

Fatal error: UnsafeMutablePointer.deinitialize with negative count Current stack trace: 0 libswiftCore.so 0x00007f166750b810 _swift_stdlib_reportFatalError + 171 1 libswiftCore.so 0x00007f1667279a86 <unavailable> + 1366662 2 libswiftCore.so 0x00007f16674b4453 <unavailable> + 3703891 3 libswiftCore.so 0x00007f1667279a86 <unavailable> + 1366662 4 libswiftCore.so 0x00007f16673e5ec0 <unavailable> + 2858688 5 libswiftCore.so 0x00007f1667279660 _fatalErrorMessage(_:_:file:line:flags:) + 19 6 libswiftSwiftOnoneSupport.so 0x00007f1664062fda <unavailable> + 163802 7 libswiftSwiftOnoneSupport.so 0x00007f1664058166 <unavailable> + 119142 8 libswiftSwiftOnoneSupport.so 0x00007f1664058100 specialized Array._copyToNewBuffer(oldCount:) + 23 9 libswiftSwiftOnoneSupport.so 0x00007f16640551a2 <unavailable> + 106914 10 libswiftSwiftOnoneSupport.so 0x00007f16640553f0 specialized Array.append(_:) + 16 13 libdispatch.so 0x00007f1663fed977 <unavailable> + 301431 14 libdispatch.so 0x00007f1663ffcd33 <unavailable> + 363827 15 libpthread.so.0 0x00007f166c5626ba <unavailable> + 30394 16 libc.so.6 0x00007f166ad7d3b0 clone + 109 /Libraries/.build/x86_64-unknown-linux/debug/libLibraries.so(callStackSymbols<A>(_:transform:)+0x87) [0x00007f1664a969c7] /Libraries/.build/x86_64-unknown-linux/debug/libLibraries.so(backtrace(_:formatter:)+0xd8) [0x00007f1664a962d8] /Libraries/.build/x86_64-unknown-linux/debug/libLibraries.so(closure #1 in closure #1 in variable initialization expression of _enablePrettyStackTrace+0x27) [0x00007f1664a90fe7] /Libraries/.build/x86_64-unknown-linux/debug/libLibraries.so(runSignalHandlers()+0x324) [0x00007f1664a92e04] /Libraries/.build/x86_64-unknown-linux/debug/libLibraries.s

stderr.txt

https://ptpb.pw/nOQC.txt/text

ああ、CoWはスレッドセーフではないのか。

あいや、メモリが足りないだけ？

@swift-4.2.4

// @escaping だけど同期的にクロージャが実行されるだけの関数 func run(_ body: @escaping () -> Void) { body() } // 値型を非同期的に更新するための機能を提供 struct Updater<Object: AnyObject, Target> { let object: Object let keyPath: ReferenceWritableKeyPath<Object, Target> func update(_ body: (inout Target) throws -> Void) rethrows { try body(&object[keyPath: keyPath]) } } // 値型、これの状態を @escaping をまたいで更新したい struct FooState { var a: Int = 0 mutating func incrementA<Object: AnyObject>(with updater: Updater<Object, FooState>) { run { // @escaping なのでこの中では `self` を更新できない updater.update { state in // Updater を使って更新 state.a += 1 } } } } // FooState を保持する参照型 class Foo { var state: FooState = FooState() func bar() { state.incrementA(with: Updater<Foo, FooState>(object: self, keyPath: \Foo.state)) } } let foo = Foo() foo.bar() print(foo.state.a)

exit status: 134 with stderr:

Simultaneous accesses to 0x7e0f7e0, but modification requires exclusive access. Previous access (a modification) started at (0x7f4374754523). Current access (a read) started at: 0 libswiftCore.so 0x00007f437005a950 swift_beginAccess + 521 3 libswiftCore.so 0x00007f436ffff1e8 <unavailable> + 3588584 4 libswiftCore.so 0x00007f436feef4a1 <unavailable> + 2475169 5 libswiftCore.so 0x00007f436feef05d <unavailable> + 2474077 6 libswiftCore.so 0x00007f436fef1600 _projectKeyPathReferenceWritable<A, B>(root:keyPath:) + 155 14 swift 0x0000000001043efe <unavailable> + 12861182 15 swift 0x0000000001048022 <unavailable> + 12877858 16 swift 0x00000000004f8b42 <unavailable> + 1018690 17 swift 0x00000000004df0bb <unavailable> + 913595 18 swift 0x00000000004da3f0 <unavailable> + 893936 19 swift 0x000000000048a348 <unavailable> + 566088 20 libc.so.6 0x00007f4372a4e740 __libc_start_main + 240 21 swift 0x0000000000488009 <unavailable> + 557065 Fatal access conflict detected. #0 0x000000000410b054 PrintStackTraceSignalHandler(void*) (/usr/bin/swift+0x410b054) #1 0x0000000004108ee2 llvm::sys::RunSignalHandlers() (/usr/bin/swift+0x4108ee2) #2 0x000000000410b202 SignalHandler(int) (/usr/bin/swift+0x410b202) #3 0x00007f4374324390 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x11390) #4 0x00007f4372a63428 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x35428) #5 0x00007f4372a6502a abort (/lib/x86_64-linux-gnu/libc.so.6+0x3702a) #6 0x00007f437005a742 (/usr/lib/swift/linux/libswiftCore.so+0x3c7742) #7 0x00007f437005ac38 (/usr/lib/swift/linux/libswiftCore.so+0x3c7c38) #8 0x00007f43747543d9 #9 0x00007f43747549c

stderr.txt

https://ptpb.pw/dFjX.txt/text

@swift-4.2.4 --version

Swift version 4.2.1 (swift-4.2.1-RELEASE) Target: x86_64-unknown-linux-gnu

@swift-main

protocol A { associatedtype ARelated } protocol B: A { associatedtype BRelated: Codable } extension B where Self.ARelated: Codable { typealias BRelated = Self.ARelated } struct AImpl: A, B { typealias BRelated = ARelated struct ARelated: Codable { let val: Int } }

(edited)

no output (edited)

@swift-4.2.4 import Foundation print(String(format: "%@", "hello" as NSString)) (edited)

exit status: 1 with stderr:

<stdin>:3:36: error: argument type 'NSString' does not conform to expected type 'CVarArg' print(String(format: "%@", "hello" as NSString)) ~~~~~~~~^~~~~~~~~~~ as! CVarArg

(edited)

SwiftyMathがswift-DEVELOPMENT-SNAPSHOT-2018-11-13-aでビルドできなくなった。

swift-nightlyボット、swift-DEVELOPMENT-SNAPSHOT-2018-11-14-aで久しぶりにCI通ったけど、ボットとして動かなかったのでswift-DEVELOPMENT-SNAPSHOT-2018-10-03-aまでロールバック。

@swift-4.2.4

import Foundation class Cat { @objc func nya() -> Int { return 3 } } class Dog { @objc func wan() -> Int { return 4 } } func f(_ a: AnyObject) { let x = a.nya() let y = a.wan?() print(type(of: x), x) // Int 3 print(type(of: y), y) // Optional<Int> nil } f(Cat())

exit status: 134 with stderr:

<stdin>:15:24: warning: expression implicitly coerced from 'Int?' to 'Any' print(type(of: y), y) // Optional<Int> nil ^ <stdin>:15:24: note: provide a default value to avoid this warning print(type(of: y), y) // Optional<Int> nil ^ ?? <#default value#> <stdin>:15:24: note: force-unwrap the value to avoid this warning print(type(of: y), y) // Optional<Int> nil ^ ! <stdin>:15:24: note: explicitly cast to 'Any' with 'as Any' to silence this warning print(type(of: y), y) // Optional<Int> nil ^ as Any <unknown>:0: error: fatal error encountered during compilation; please file a bug report with your project and the crash log <unknown>:0: note: Program used external function 'sel_registerName' which could not be resolved! #0 0x000000000410ac94 PrintStackTraceSignalHandler(void*) (/usr/bin/swift+0x410ac94) #1 0x0000000004108b22 llvm::sys::RunSignalHandlers() (/usr/bin/swift+0x4108b22) #2 0x000000000410ae42 SignalHandler(int) (/usr/bin/swift+0x410ae42) #3 0x00007fddc4398390 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x11390) #4 0x00007fddc2ad7428 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x35428) #5 0x00007fddc2ad902a abort (/lib/x86_64-linux-gnu/libc.so.6+0x3702a) #6 0x00000000004dfb25 (/usr/bin/swift+0x4dfb25) #7 0x00000000040a35ff llvm::report_fatal_error(llvm::Twine const&, bool) (/usr/bin/swift+0x40a35ff) #8 0x000000000105591b llvm::RuntimeDyldImpl::resolveExternalSymbols() (/usr/bin/swift+0x105591b) #9 0x00000000010542e6 llvm::RuntimeDyldImpl::resolveRelocations() (/usr/bin/swift+0x10542e6) #10 0x0000000001041fcd llvm::MCJIT::finalizeObject() (/usr/bin/swift+0x1041fcd) #11 0x00000000004f88de swift::RunImmediately(swift::CompilerInstance&, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<st

stderr.txt

https://ptpb.pw/f1DP.txt/text

@swift-4.2.4

import Foundation class Cat { @objc func nya() -> Int { return 3 } } class Dog { @objc func wan() -> Int { return 4 } } func f(_ a: AnyObject) { let x = a.nya() let y = a.wan?() print(type(of: x), x) // Int 3 print(type(of: y), y) // Optional<Int> nil }

(edited)

stderr:

<stdin>:15:24: warning: expression implicitly coerced from 'Int?' to 'Any' print(type(of: y), y) // Optional<Int> nil ^ <stdin>:15:24: note: provide a default value to avoid this warning print(type(of: y), y) // Optional<Int> nil ^ ?? <#default value#> <stdin>:15:24: note: force-unwrap the value to avoid this warning print(type(of: y), y) // Optional<Int> nil ^ ! <stdin>:15:24: note: explicitly cast to 'Any' with 'as Any' to silence this warning print(type(of: y), y) // Optional<Int> nil ^ as Any

(edited)

@swift-4.2.4 import Foundation try! JSONDecoder().decode([Int].self, from: "".data(using: .utf8)!) (edited)

exit status: 1 with stderr:

<stdin>:2:6: error: use of unresolved identifier 'JSONDecoder' try! JSONDecoder().decode([Int].self, from: "".data(using: .utf8)!) ^~~~~~~~~~~

@swift-4.2.4

import Foundation do { _ = try JSONDecoder().decode([Int].self, from: "".data(using: .utf8)!) } catch let error { print(error) }

⚠️ [DecodingError.dataCorrupted: The given data was not valid JSON.]

swift-5.0-branchのスナップショットCIが動き始めた。swift50ボットの準備をしないと… https://ci.swift.org/view/swift-5.0-branch/

@swift-tensorflow #if swift(>=4.2.1) print("4.2.1") #elseif swift(>=4.2) print("4.2") #endif

4.2

@swift-5.0.3 @swift-main import Foundation print(ProcessInfo.processInfo.environment["SWIFT_VERSION"]!)

DEVELOPMENT-SNAPSHOT-2018-12-07-a

5.0-DEVELOPMENT-SNAPSHOT-2018-12-07-a

swift-nightlyボットを更新し、swift-5.0ボットを追加しました。 (edited)

6:20 AM

ボット自身をビルドするSwiftのバージョンを固定したため、ツールチェイン不具合の影響を受けずに、ボットが更新される様になりました。

@swift-4.2.4 @swift-5.0.3

import Foundation // column 1 2 3 4 5 6 7 8 9 10 11 // line 1 L I N E 1 _ 6 7 あ \n // line 2 L I N E 2 _ 7 8 9 0 \n // line 3 L I N E 3 _ 8 9 0 1 \n let string = "LINE1_67あ\nLINE2_7890\nLINE3_8901\n" let rangeOfFirstLine = string.lineRange(for: string.startIndex..<string.startIndex) let firstLine = string[rangeOfFirstLine] print(string.distance(from: rangeOfFirstLine.lowerBound, to: rangeOfFirstLine.upperBound)) print(firstLine == "LINE1_67あ\n")

10 true

exit status: 4 with stderr:

Fatal error: String index is out of bounds Current stack trace: 0 libswiftCore.so 0x00007f2fb98a75e0 _swift_stdlib_reportFatalError + 69 1 libswiftCore.so 0x00007f2fb97ac1b6 <unavailable> + 3125686 2 libswiftCore.so 0x00007f2fb97ac535 <unavailable> + 3126581 3 libswiftCore.so 0x00007f2fb97b1a39 <unavailable> + 3148345 4 libswiftCore.so 0x00007f2fb97b518b <unavailable> + 3162507 5 libswiftCore.so 0x00007f2fb983a050 String.distance(from:to:) + 9 7 swift 0x0000000000cee8be <unavailable> + 9365694 8 swift 0x0000000000cf2ad2 <unavailable> + 9382610 9 swift 0x000000000051612f <unavailable> + 1138991 10 swift 0x00000000004eafb5 <unavailable> + 962485 11 swift 0x00000000004e6456 <unavailable> + 943190 12 swift 0x000000000048d88e <unavailable> + 579726 13 libc.so.6 0x00007f2fbc4c9740 __libc_start_main + 240 14 swift 0x000000000048b6c9 <unavailable> + 571081 Stack dump: 0. Program arguments: /usr/bin/swift -frontend -interpret - -disable-objc-interop -I /Libraries/.build/x86_64-unknown-linux/debug -I /Libraries/.build/checkouts/swift-nio-b68c973e/Sources/CNIOZlib/include -I /Libraries/.build/checkouts/swift-nio-b68c973e/Sources/CNIOHTTPParser/include -I /Libraries/.build/checkouts/swift-nio-ssl-93eb7dfa/Sources/CNIOOpenSSL/include -I /Libraries/.build/checkouts/crypto-36ec1aea/Sources/CCryptoOpenSSL/include -I /Libraries/.build/checkouts/crypto-36ec1aea/Sources/CBcrypt/include -I /Libraries/.build/checkouts/crypto-36ec1aea/Sources/CBase32/include -I /Libraries/.build/checkouts/swift-nio-b68c973e/Sources/CNIOSHA1/include -I /Libraries/.build/checkouts/swift-nio-b68c973e/S

stderr.txt

https://ptpb.pw/8t1k.txt/text

@swift-5.0.3 let rain = #"The "rain" in "Spain" falls mainly on the Spaniards."# print(rain)

The "rain" in "Spain" falls mainly on the Spaniards.

@swift-5.0.3 let keypaths = #"Swift keypaths such as \Person.name hold uninvoked references to properties."# print(keypaths)

Swift keypaths such as \Person.name hold uninvoked references to properties.

@swift-5.0.3 let answer = 42 let dontpanic = #"The answer to life, the universe, and everything is \#(answer)."# print(dontpanic)

The answer to life, the universe, and everything is 42.

@swift-5.0.3 let str = ##"My dog said "woof"#gooddog"## print(str)

My dog said "woof"#gooddog

@swift-5.0.3

let answer = 42 let multiline = #""" The answer to life, the universe, and everything is \#(answer). """# print(multiline)

(edited)

The answer to life, the universe, and everything is 42. (edited)

@swift-5.0.3

let answer = 42 let multiline = #""" The answer to life, the universe, and everything is \#(answer). """# print(multiline)

The answer to life, the universe, and everything is 42.

@swift-5.0.3 let regex2 = #"\\[A-Z]+[A-Za-z]+\.[a-z]+"# print(regex2)

\\[A-Z]+[A-Za-z]+\.[a-z]+

@swift-5.0.3

let times = [ "Hudson": "38", "Clarke": "42", "Robinson": "35", "Hartis": "DNF" ] let finishers1 = times.compactMapValues { Int($0) } let finishers2 = times.compactMapValues(Int.init) print(finishers1) print(finishers2)

["Robinson": 35, "Hudson": 38, "Clarke": 42] ["Hudson": 38, "Clarke": 42, "Robinson": 35]

@swift-5.0.3

let times = [ "Hudson": "38", "Clarke": "42", "Robinson": "35", "Hartis": "DNF" ] let finishers1 = times.compactMapValues { Int($0) } let finishers2 = times.compactMapValues(Int.init) print(finishers1) print(finishers2)

["Hudson": 38, "Clarke": 42, "Robinson": 35] ["Hudson": 38, "Robinson": 35, "Clarke": 42]

順番変わるのか

辞書になった時点で順番の保証は無いよ、リテラルから辞書になる過程では保持されてるけど

この順番ってどこで決まるの？

内部的なハッシュテーブルのエントリ順

なるほー

OSS FoundationのDictionaryの内部を追っていけば正確にわかりそう

@swift-5.0.3

let times1 = [ "Hudson": "38", "Clarke": "42", "Robinson": "35", "Hartis": "DNF" ] print(times1) let times2 = [ "Hudson": "38", "Clarke": "42", "Robinson": "35", "Hartis": "DNF" ] print(times2)

["Hartis": "DNF", "Hudson": "38", "Clarke": "42", "Robinson": "35"] ["Robinson": "35", "Hudson": "38", "Clarke": "42", "Hartis": "DNF"]

インスタンス毎にシードがランダムに変わるので、本当に不定です。

全く同じでも変わるのか。

@swift-5.0.3 let scores = [100, 80, 85] let passCount = scores.count { $0 >= 85 } print(passCount) (edited)

2 (edited)

countだ

Swifrt5のproposalを総ナメしてて、荒らしみたいになってるw

2:05 AM

@swift-5.0.3 print(3.isMultiple(of: 3)) (edited)

true (edited)

@swift-main -frontend -repl :print_decl Result

@_frozen enum Result<Success, Failure> where Failure : Error { case success(Success) case failure(Failure) func map<NewSuccess>(_ transform: (Success) -> NewSuccess) -> Result<NewSuccess, Failure> func mapError<NewFailure>(_ transform: (Failure) -> NewFailure) -> Result<Success, NewFailure> where NewFailure : Error func flatMap<NewSuccess>(_ transform: (Success) -> Result<NewSuccess, Failure>) -> Result<NewSuccess, Failure> func flatMapError<NewFailure>(_ transform: (Failure) -> Result<Success, NewFailure>) -> Result<Success, NewFailure> where NewFailure : Error func get() throws -> Success } extension Result where Failure == Error { init(catching body: () throws -> Success) } extension Result : Equatable where Success : Equatable, Failure : Equatable { static func == (a: Result<Success, Failure>, b: Result<Success, Failure>) -> Bool } extension Result : Hashable where Success : Hashable, Failure : Hashable { var hashValue: Int { get } func hash(into hasher: inout Hasher) }

おー

@d_date Swifrt5のproposalを総ナメしてて、荒らしみたいになってるw 問題ないかと。どうしても気になるなら、ダイレクトメッセージをボットに送るとよいです。

ありがとうございます

https://twitter.com/d_date/status/1071671686930386944

Daiki Matsudate (@d_date)

今あなたがiOS / Swiftの勉強会で聞きたいネタはなんですか2018年末。その他はリプライください。

2:39 AM

これの準備かしら

見てるぶんには勉強になるからいいんじゃないかな。

1

ボットへのダイレクトメッセージは練習に使う事を想定しています。 (edited)

2:54 AM

ダイレクトメッセージを使うデメリットは、複数のボットへ同時に話しかけられない点かな。

2:54 AM

それも、グループDMを使えばいいのかな。 (edited)

2:55 AM

ぬ、グループDMを使うにはボットをフレンド登録する必要があるのか。

そしてボットはフレンド登録できないらしい。

@swift-4.2.4 @swift-5.0.3 func doubleOptionalInt() throws -> Int?? { return 3 } let x = try? doubleOptionalInt() print(x as Any) (edited)

Optional(Optional(3)) (edited)

Optional(Optional(Optional(3))) (edited)

@swift-4.2.4 @swift-5.0.3

enum Result<Value, Error> { case success(Value) case failure(Error) } extension Result: Equatable where Value: Equatable, Error: Equatable { static func == (lhs: Result, rhs: Result) -> Bool { switch (lhs, rhs) { case let (.success(lhs), .success(rhs)): return lhs == rhs case let (.failure(lhs), .failure(rhs)): return lhs == rhs case (.success, .failure), (.failure, .success): return false } } } extension Result: Hashable where Value: Hashable, Error: Hashable { var hashValue: Int { switch self { case let .success(value): return value.hashValue case let .failure(error): return error.hashValue } } } let foo = Result<Int, Never>.success(1) let bar = Result<Int, Never>.success(1) print(foo == bar)

(edited)

true (edited)

exit status: 1 with stderr:

<stdin>:33:11: error: type 'Never' does not conform to protocol 'Equatable' print(foo == bar) ^ <stdin>:33:11: error: '<Self where Self : Equatable> (Self.Type) -> (Self, Self) -> Bool' requires that 'Never' conform to 'Equatable' print(foo == bar) ^ <stdin>:33:11: note: requirement specified as 'Never' : 'Equatable' print(foo == bar) ^ <stdin>:33:11: note: requirement from conditional conformance of 'Result<Int, Never>' to 'Equatable' print(foo == bar) ^

(edited)

@swift-4.2.4 print(DictionaryLiteral<String, String>(dictionaryLiteral: ("hoge", "fuga"))) (edited)

DictionaryLiteral<String, String>(_elements: [("hoge", "fuga")]) (edited)

@swift-5.0.3 print(KeyValuePairs<String, String>(dictionaryLiteral: ("hoge", "fuga"))) (edited)

["hoge": "fuga"] (edited)

@swift-5.0.3 print(DictionaryLiteral<String, String>(dictionaryLiteral: ("hoge", "fuga")))

["hoge": "fuga"]stderr:

<stdin>:2:7: warning: 'DictionaryLiteral' is deprecated: renamed to 'KeyValuePairs' print(DictionaryLiteral<String, String>(dictionaryLiteral: ("hoge", "fuga"))) ^ <stdin>:2:7: note: use 'KeyValuePairs' instead print(DictionaryLiteral<String, String>(dictionaryLiteral: ("hoge", "fuga"))) ^~~~~~~~~~~~~~~~~ KeyValuePairs

@swift-5.0.3 @swift-4.2.4 #if swift(<5.1) print("OK") #endif #if compiler(<5.1) print("OK") #endif

OK OK

exit status: 1 with stderr:

<stdin>:2:11: error: unexpected platform condition argument: expected a unary comparison, such as '>=2.2' #if swift(<5.1) ^ <stdin>:6:15: error: unexpected platform condition argument: expected a unary comparison, such as '>=2.2' #if compiler(<5.1) ^

@swift-4.2.4 @swift-5.0.3 var x = 1 x.self = 2 print(x.self) // prints 2 let id = \Int.self x[keyPath: id] = 3 print(x[keyPath: id]) // prints 3 (edited)

exit status: 1 with stderr:

<stdin>:6:11: error: invalid component of Swift key path let id = \Int.self ^ <stdin>:6:10: error: expression type 'WritableKeyPath<_, _>' is ambiguous without more context let id = \Int.self ^~~~~~~~~

(edited)

2 3 (edited)

@swift-5.0.3 @swift-4.2.4

// Example 1: // Users expect `0xffff_ffff_ffff_ffff` to be coerced to type `UInt`. print(UInt(0xffff_ffff_ffff_ffff as UInt)) print(UInt(0xffff_ffff_ffff_ffff))

(edited)

18446744073709551615 18446744073709551615 (edited)

exit status: 1 with stderr:

<stdin>:6:12: error: integer literal '18446744073709551615' overflows when stored into 'Int' print(UInt(0xffff_ffff_ffff_ffff)) ^

(edited)

@swift-4.0.3 @swift-4.1.3 @swift-4.2.4 import Foundation if [1] == [1] { print("OK") } (edited)

OK (edited)

exit status: 1 with stderr:

<stdin>:4:8: error: ambiguous use of operator '==' if [1] == [1] { ^ Foundation.IndexPath:28:24: note: found this candidate public static func == (lhs: Foundation.IndexPath, rhs: Foundation.IndexPath) -> Bool ^ Foundation.IndexSet:2:24: note: found this candidate public static func == (lhs: Foundation.IndexSet, rhs: Foundation.IndexSet) -> Bool ^

exit status: 1 with stderr:

<stdin>:4:8: error: ambiguous use of operator '==' if [1] == [1] { ^ Foundation.IndexPath:28:24: note: found this candidate public static func == (lhs: Foundation.IndexPath, rhs: Foundation.IndexPath) -> Bool ^ Foundation.IndexSet:2:24: note: found this candidate public static func == (lhs: Foundation.IndexSet, rhs: Foundation.IndexSet) -> Bool ^

exit status: 1 with stderr:

<stdin>:4:8: error: ambiguous use of operator '==' if [1] == [1] { ^ Foundation.IndexPath:46:24: note: found this candidate public static func ==(lhs: Foundation.IndexPath, rhs: Foundation.IndexPath) -> Bool ^ Foundation.IndexSet:2:24: note: found this candidate public static func ==(lhs: Foundation.IndexSet, rhs: Foundation.IndexSet) -> Bool ^

なるほど

@swift-4.2.4

import SwiftBacktrace print(swiftDemangleName("$S13ExampleNumber6isEven6numberSbSi_tF")) print(swiftSimplifiedDemangleName("$S13ExampleNumber6isEven6numberSbSi_tF"))

(edited)

ExampleNumber.isEven(number: Swift.Int) -> Swift.Bool isEven(number:) (edited)

@swift-5.0.3

import Foundation public extension String.StringInterpolation { mutating func appendInterpolation(_ value: Date, _ formatter: DateFormatter) { appendLiteral(formatter.string(from: value)) } } public extension DateFormatter { static func format(date: Style, time: Style) -> DateFormatter { let formatter = DateFormatter() formatter.locale = Locale.current (formatter.dateStyle, formatter.timeStyle) = (date, time) return formatter } } let formatter = DateFormatter.format(date: .none, time: .long) print("\(Date(), formatter)")

3:11:18 PM GMT+9

あー便利だこれ

6:17 AM

@swift-5.0.3

import Foundation public extension String.StringInterpolation { mutating func appendInterpolation(_ value: Date, _ formatter: DateFormatter) { appendLiteral(formatter.string(from: value)) } } public extension DateFormatter { static func format(date: Style, time: Style, locale: Locale = .current) -> DateFormatter { let formatter = DateFormatter() formatter.locale = locale (formatter.dateStyle, formatter.timeStyle) = (date, time) return formatter } } let formatter = DateFormatter.format(date: .none, time: .long) print("\(Date(), formatter)")

3:17:13 PM GMT+9

@swift-5.0.3 -frontend -repl :print_decl Result

@_frozen enum Result<Success, Failure> where Failure : Error { case success(Success) case failure(Failure) func map<NewSuccess>(_ transform: (Success) -> NewSuccess) -> Result<NewSuccess, Failure> func mapError<NewFailure>(_ transform: (Failure) -> NewFailure) -> Result<Success, NewFailure> where NewFailure : Error func flatMap<NewSuccess>(_ transform: (Success) -> Result<NewSuccess, Failure>) -> Result<NewSuccess, Failure> func flatMapError<NewFailure>(_ transform: (Failure) -> Result<Success, NewFailure>) -> Result<Success, NewFailure> where NewFailure : Error func get() throws -> Success } extension Result where Failure == Error { init(catching body: () throws -> Success) } extension Result : Equatable where Success : Equatable, Failure : Equatable { static func == (a: Result<Success, Failure>, b: Result<Success, Failure>) -> Bool } extension Result : Hashable where Success : Hashable, Failure : Hashable { var hashValue: Int { get } func hash(into hasher: inout Hasher) }

自分でResultをまんま実装すると、 extension Result where Failure == Error { init(catching body: () throws -> Success) } でコンパイルエラーになるんですよね

それは、 protocol P に対して P型(existential)それ自体は P に準拠しないから

6:36 AM

<Failure : Error(これはプロトコル) > にたいして Failure == Error ( これはExistential)

6:37 AM

を制約しても意味ないから、間違ってるよってエラーです

6:37 AM

このプロポーザルによって、

6:37 AM

Error(exis)型それ自体もErrorプロトコルであるように、

6:37 AM

変更されるから

6:37 AM

その言語仕様の変更とセットじゃないと意味がないコード。

@swift-5.0.3

enum MyResult<Success, Failure: Error> { case success(Success) case failure(Failure) } extension MyResult where Failure == Error { init(catching body: () throws -> Success) { do { self = .success(try body()) } catch { self = .failure(error) } } } print(type(of: MyResult { 1 }))

MyResult<Int, Error>

そういうことかー

6:45 AM

@swift-5.0.3 print(type(of: Result { 1 }))

Result<Int, Error>

ResultはSwift5に入ったからこれも動くと。

プロポーザルの第二回レビューでコアチームの人が言い出して導入されてちょっとびっくりした。

6:46 AM

あ、そうだね、サードパーティのResultにも、AnyErrorが提供されていることがあるけど、それが不要になるよ。

やったね〜〜

あと Never : Error も入るから、 NoError も不要に。

NeverのconformanceはResultに向けたもので、しばらくは使われないのかと思ったけど、ちゃんとResultも入ったので安心。

@swift-5.0.3 let foo = Result<Int, Never>.success(1) let bar = Result<Int, Never>.success(1) print(foo == bar)

true

@swift-5.0.3 print(#"\a\b"#)

\a\b

@swift-5.0.3 print(###"aaa"bbb#ccc"###)

aaa"bbb#ccc

@swift-4.2.4 @swift-5.0.3 import Foundation print(UUID().uuidString) (edited)

f9db6c73-cdf1-472d-89a6-f406f7d194eb (edited)

2F2A909C-271D-4144-943F-158426CFC90E (edited)

@swiftbot

class Base { func foo(x: Int = 12) {} } class Derived : Base { override func foo(x: Int = 42) { print(x) } } func test1(obj: Base) { obj.foo() } func test2(obj: Derived) { obj.foo() } test1(obj: Derived()) test2(obj: Derived())

(edited)

1

(edited)

rintaro

class Base { func foo(x: Int = 12) {} } class Derived : Base { override func foo(x: Int = 42) { print(x) } } func test1(obj: Base) { obj.foo() } func test2(obj: Derived) { obj.foo() } test1(obj: Derived()) test2(obj: Derived())

Version:

swift-4.2.1-RELEASE

Output:

12 42

Error:

理解はできるけど、釈然としない。

仕様も解るし気持ちもわかる…

@swift-4.2.4

class Base { class var defaultX: Int { return 12 } func foo(x: Int = defaultX) {} } class Derived : Base { override class var defaultX: Int { return 42 } override func foo(x: Int = defaultX) { print(x) } } func test1(obj: Base) { obj.foo() } func test2(obj: Derived) { obj.foo() } test1(obj: Derived()) test2(obj: Derived())

12 42

これでもダメなんですね

そうなんですよね。僕もちょうどそれ試してた。

8:35 AM

@swift-4.2.4

class Base { class func getDefaultFooX() -> Int { return 12 } func foo(x: Int = getDefaultFooX()) {} } class Derived : Base { override class func getDefaultFooX() -> Int { return 42 } override func foo(x: Int = getDefaultFooX()) { print(x) } } func test1(obj: Base) { obj.foo() } func test2(obj: Derived) { obj.foo() } test1(obj: Derived()) test2(obj: Derived())

12 42

https://forums.swift.org/t/pitch-allow-default-parameter-overrides/10673/5 Jordan のこのコメントをもって、最初のやつ以外はバグとしたいお気持ち

[Pitch] Allow default parameter overrides

Adam and Xiaodi have it correct, and it’s always possible to get the effect you want by adding an overridable method to mySuperClass (something like ‘defaultStatement()’).

8:43 AM

とはいえコメントの意図としては

class Base { func getDefaultFooX() -> Int { return 12 } func foo(x: Int? = nil) { let x = x ?? getDefaultFooX() print(x) } } class Derived : Base { override func getDefaultFooX() -> Int { return 42 } }

という事なのでしょうね。 (edited)

フムー

面白い

@swift-4.2.4 @swift-5.0.3 @swift-main import Foundation let a = Float80.init(6.8523015e+5) let b = 6.8523015e+5 as Float80 print(a) print(b) print(a == b)

685230.1500000000233 685230.15 false

あれ？最近それ同じになってませんでしたっけ

Float80だけバグってる。

1:19 AM

Float80.init(_ other: Double)が呼ばれてる。

64bit経由になってるんですか、それはまずいですねｗ

https://bugs.swift.org/browse/SR-9609

えらい

@swift-4.2.4 @swift-5.0.3 import Foundation let a = Float80(6.8523015e+5) let b = 6.8523015e+5 as Float80 print(a) print(b) print(a == b) (edited)

685230.1500000000233 685230.15 false (edited)

685230.15 685230.15 true (edited)

https://github.com/apple/swift-evolution/blob/master/proposals/0213-literal-init-via-coercion.md で変わったのね。 (edited)

apple/swift-evolution

This maintains proposals for changes and user-visible enhancements to the Swift Programming Language. - apple/swift-evolution

1:24 AM

DoubleとFloatはSE-0213導入前の挙動でも問題が起きていなかったと。

@swift-4.2.4 -frontend -repl

protocol P { func hoge(_ a: Int) func hoge(_ a: String) } extension P { func hoge(_ a: Int) {} } struct S : P { func hoge<X>(_ a: X) {} } let s = S() :constraints debug on s.hoge(1) s.hoge("a")

// s : S = REPL.S()stderr:

---Constraint solving for the expression at [<REPL Input>:1:1 - line:1:9]--- (overload set choice binding $T0 := S) ---Initial constraints for the given expression--- (call_expr type='$T3' location=<REPL Input>:1:3 range=[<REPL Input>:1:1 - line:1:9] arg_labels=_: (unresolved_dot_expr type='$T1' location=<REPL Input>:1:3 range=[<REPL Input>:1:1 - line:1:3] field 'hoge' function_ref=single (declref_expr type='S' location=<REPL Input>:1:1 range=[<REPL Input>:1:1 - line:1:1] decl=REPL.(file).s@<REPL Input>:1:5 direct_to_storage function_ref=unapplied)) (paren_expr type='($T2)' location=<REPL Input>:1:8 range=[<REPL Input>:1:7 - line:1:9] (integer_literal_expr type='$T2' location=<REPL Input>:1:8 range=[<REPL Input>:1:8 - line:1:8] value=1))) Score: 0 0 0 0 0 0 0 0 0 0 0 Type Variables: $T0 [lvalue allowed] as S @ locator@0x8a91c18 [DeclRef@<REPL Input>:1:1] $T1 [lvalue allowed] subtype_of_existential involves_type_vars bindings={} @ locator@0x8a91c98 [UnresolvedDot@<REPL Input>:1:3 -> member] $T2 fully_bound literal=3 involves_type_vars bindings={(subtypes of) (default from ExpressibleByIntegerLiteral) Int} @ locator@0x8a91df0 [IntegerLiteral@<REPL Input>:1:8] $T3 fully_bound subtype_of_existential involves_type_vars bindings={} @ locator@0x8a91e98 [Call@<REPL Input>:1:3 -> function result] Active Constraints: Inactive Constraints: disjunction [[locator@0x8a91c98 [UnresolvedDot@<REPL Input>:1:3 -> member]]]:$T1 bound to decl REPL.(file).S.hoge@<REPL Input>:2:12 : <X> (S) -> (X) -> () at <REPL Input>:2:12 [[locator@0x8a91c98 [UnresolvedDot@<REPL Input>:1:3 -> member]]]; or $T1 bound to decl REPL.(file).P.hoge@<REPL Input>:2:12 : <Self where Self : P> (Self) -> (Int) -> () at <REPL Input>:2:12 [[locator@0x8a91c98 [UnresolvedDot@<REPL Input>:1:3 -> member]]]; $T2 literal conforms to ExpressibleByIntegerLiteral [[locator@0x8a91df0 [IntegerLiteral@<REPL Input>:1:8]]]; ($T2) -> $T3 applicable fn $T1 [[loc

え、こわれた。

12:01 AM

<X>がプロトコルじゃなくて普通のジェネリクスってだけ？

<X> (S) -> (X) -> () と <Self where Self : P> (Self) -> (Int) -> () を比較して後者を選んでるぽいね。

あ。壊れてるんじゃなくてREPL出力か。

12:04 AM

なるほど

:constraints debug onでs.hoge(1)がどう選択されているか出力してる。

プロトコルは関係なくてよりシンプルには<X>よりextension Pが優先しているんですね

長いログをアップロードするのに使ってる https://ptpb.pw が死んでるぽい。

12:07 AM

コードをコピーして pbpaste|swift -frontend -repl として見るのが簡単。 (edited)

お、できた、長い。

12:09 AM

オーバーロード選択規則の中にジェネリクスが弱い則があるけど

12:09 AM

自前定義かdefault extensionかっていう部分は無いのかな

無さげ

@swift-nightly -frontend -emit-syntax

import Foundation public class TestFunctionDeclDefaultArgument { func multipleArgument(argument1: Int = 1, argument2: String = "string") { } }

3:49 PM

@swift-main -frontend -emit-syntax

import Foundation public class TestFunctionDeclDefaultArgument { func multipleArgument(argument1: Int = 1, argument2: String = "string") { } }

{"id":49,"kind":"SourceFile","layout":[{"id":48,"kind":"CodeBlockItemList","layout":[{"id":6,"kind":"CodeBlockItem","layout":[{"id":5,"kind":"ImportDecl","layout":[null,null,{"id":1,"tokenKind":{"kind":"kw_import"},"leadingTrivia":[{"kind":"Newline","value":1}],"trailingTrivia":[{"kind":"Space","value":1}],"presence":"Present"},null,{"id":4,"kind":"AccessPath","layout":[{"id":3,"kind":"AccessPathComponent","layout":[{"id":2,"tokenKind":{"kind":"identifier","text":"Foundation"},"leadingTrivia":[],"trailingTrivia":[],"presence":"Present"},null],"presence":"Present"}],"presence":"Present"}],"presence":"Present"},null,null],"presence":"Present"},{"id":46,"kind":"CodeBlockItem","layout":[{"id":45,"kind":"ClassDecl","layout":[null,{"id":9,"kind":"ModifierList","layout":[{"id":8,"kind":"DeclModifier","layout":[{"id":7,"tokenKind":{"kind":"kw_public"},"leadingTrivia":[{"kind":"Newline","value":2}],"trailingTrivia":[{"kind":"Space","value":1}],"presence":"Present"},null,null,null],"presence":"Present"}],"presence":"Present"},{"id":10,"tokenKind":{"kind":"kw_class"},"leadingTrivia":[],"trailingTrivia":[{"kind":"Space","value":1}],"presence":"Present"},{"id":11,"tokenKind":{"kind":"identifier","text":"TestFunctionDeclDefaultArgument"},"leadingTrivia":[],"trailingTrivia":[{"kind":"Space","value":1}],"presence":"Present"},null,null,null,{"id":44,"kind":"MemberDeclBlock","layout":[{"id":12,"tokenKind":{"kind":"l_brace"},"leadingTrivia":[],"trailingTrivia":[],"presence":"Present"},{"id":42,"kind":"MemberDeclList","layout":[{"id":41,"kind":"MemberDeclListItem","layout":[{"id":40,"kind":"FunctionDecl","layout":[null,null,{"id":13,"tokenKind":{"kind":"kw_func"},"leadingTrivia":[{"kind":"Newline","value":1},{"kind":"Space","value":4}],"trailingTrivia":[{"kind":"Space","value":1}],"presence":"Present"},{"id":14,"tokenKind":{"kind":"identifier","text":"multipleArgument"},"leadingTrivia":[],"trailingTrivia":[],"presence":"Present"},null,{"id":36,"kind":"FunctionSignature","layout"

stdout.txt

https://ptpb.pw/pJ2-.txt/text

めっちゃ便利

3:52 PM

@swift-main -frontend -emit-syntax

import Foundation public class TestFunctionDeclNoReturn { func twoArgumentNoReturn(argument1: Int, argument2: String) { } }

{"id":42,"kind":"SourceFile","layout":[{"id":41,"kind":"CodeBlockItemList","layout":[{"id":6,"kind":"CodeBlockItem","layout":[{"id":5,"kind":"ImportDecl","layout":[null,null,{"id":1,"tokenKind":{"kind":"kw_import"},"leadingTrivia":[{"kind":"Newline","value":1}],"trailingTrivia":[{"kind":"Space","value":1}],"presence":"Present"},null,{"id":4,"kind":"AccessPath","layout":[{"id":3,"kind":"AccessPathComponent","layout":[{"id":2,"tokenKind":{"kind":"identifier","text":"Foundation"},"leadingTrivia":[],"trailingTrivia":[],"presence":"Present"},null],"presence":"Present"}],"presence":"Present"}],"presence":"Present"},null,null],"presence":"Present"},{"id":39,"kind":"CodeBlockItem","layout":[{"id":38,"kind":"ClassDecl","layout":[null,{"id":9,"kind":"ModifierList","layout":[{"id":8,"kind":"DeclModifier","layout":[{"id":7,"tokenKind":{"kind":"kw_public"},"leadingTrivia":[{"kind":"Newline","value":2}],"trailingTrivia":[{"kind":"Space","value":1}],"presence":"Present"},null,null,null],"presence":"Present"}],"presence":"Present"},{"id":10,"tokenKind":{"kind":"kw_class"},"leadingTrivia":[],"trailingTrivia":[{"kind":"Space","value":1}],"presence":"Present"},{"id":11,"tokenKind":{"kind":"identifier","text":"TestFunctionDeclNoReturn"},"leadingTrivia":[],"trailingTrivia":[{"kind":"Space","value":1}],"presence":"Present"},null,null,null,{"id":37,"kind":"MemberDeclBlock","layout":[{"id":12,"tokenKind":{"kind":"l_brace"},"leadingTrivia":[],"trailingTrivia":[],"presence":"Present"},{"id":35,"kind":"MemberDeclList","layout":[{"id":34,"kind":"MemberDeclListItem","layout":[{"id":33,"kind":"FunctionDecl","layout":[null,null,{"id":13,"tokenKind":{"kind":"kw_func"},"leadingTrivia":[{"kind":"Newline","value":1},{"kind":"Space","value":4}],"trailingTrivia":[{"kind":"Space","value":1}],"presence":"Present"},{"id":14,"tokenKind":{"kind":"identifier","text":"twoArgumentNoReturn"},"leadingTrivia":[],"trailingTrivia":[],"presence":"Present"},null,{"id":29,"kind":"FunctionSignature","layout":[{"

stdout.txt

https://ptpb.pw/a-oM.txt/text

@swift-4.2.4 @swift-5.0.3 @swift-main import Foundation print(NSNumber(value: 1.2 as Float).description)

1.20000004768372

exit status: 4 with stderr:

Fatal error: Unknown NSNumber Type: file /home/buildnode/jenkins/workspace/oss-swift-package-linux-ubuntu-16_04/swift-corelibs-foundation/Foundation/NSNumber.swift, line 1041 Stack dump: 0. Program arguments: /usr/bin/swift -frontend -interpret - -disable-objc-interop -I /Libraries/.build/x86_64-unknown-linux/debug -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOZlib/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOHTTPParser/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOSHA1/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOAtomics/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIODarwin/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOLinux/include -module-cache-path /Libraries/.build/x86_64-unknown-linux/debug/ModuleCache -D DEBUG -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOZlib.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOHTTPParser.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOSHA1.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOAtomics.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIODarwin.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOLinux.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/checkouts/swift-nio-zlib-support/module.modulemap -module-name main -lLibraries #0 0x00000000047d58a4 PrintStackTraceSignalHan

stderr.txt

https://ptpb.pw/Pbrg.txt/text

exit status: 4 with stderr:

Fatal error: Unknown NSNumber Type: file /home/buildnode/jenkins/workspace/oss-swift-5.0-package-linux-ubuntu-16_04/swift-corelibs-foundation/Foundation/NSNumber.swift, line 1041 Stack dump: 0. Program arguments: /usr/bin/swift -frontend -interpret - -disable-objc-interop -I /Libraries/.build/x86_64-unknown-linux/debug -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOZlib/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOHTTPParser/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOSHA1/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOAtomics/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIODarwin/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOLinux/include -module-cache-path /Libraries/.build/x86_64-unknown-linux/debug/ModuleCache -D DEBUG -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOZlib.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOHTTPParser.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOSHA1.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOAtomics.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIODarwin.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOLinux.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/checkouts/swift-nio-zlib-support/module.modulemap -module-name main -lLibraries #0 0x0000000004621134 PrintStackTraceSigna

stderr.txt

https://ptpb.pw/mLiU.txt/text

@swift-4.1.3

let data = """ {"data": 9223372036854775808} """ struct Foo: Codable { var data: UInt64 } import Foundation print(try! JSONDecoder().decode(Foo.self, from: data.data(using: .utf8)!))

Foo(data: 9223372036854775807)

お

macOSだと問題ないね。

$ pbpaste let data = """ {"data": 9223372036854775808} """ struct Foo: Codable { var data: UInt64 } import Foundation print(try! JSONDecoder().decode(Foo.self, from: data.data(using: .utf8)!))% $ pbpaste|xcrun --toolchain org.swift.40320171205a swift - Foo(data: 9223372036854775808) $ pbpaste|xcrun --toolchain org.swift.41320180727a swift - Foo(data: 9223372036854775808) $ pbpaste|xcrun --toolchain org.swift.42120181030a swift - Foo(data: 9223372036854775808) $ pbpaste|xcrun --toolchain org.swift.5020190116a swift - Foo(data: 9223372036854775808)

ですね

@swift-4.2.4 @swift-5.0.3

let data = """ {"data": 9223372036854775808} """ import Foundation dump(try! JSONSerialization.jsonObject(with: data.data(using: .utf8)!))

▿ 1 key/value pair ▿ (2 elements) - key: "data" ▿ value: 9223372036854775808 #0 - super: Foundation.NSValue - super: Foundation.NSObject ▿ _base: Foundation._CFInfo - info: 5766 - pad: 0 - _pad: 0

▿ 1 key/value pair ▿ (2 elements) - key: "data" ▿ value: 9223372036854775807 #0 - super: Foundation.NSValue - super: Foundation.NSObject ▿ _base: Foundation._CFInfo - info: 5763 - pad: 0 - _pad: 9223372036854775807

@swift-4.2.4 @swift-5.0.3 class Entity<Base> {} class Tweet: Entity<Tweet> {} print(Tweet())

main.Tweet

execution timeout with no output

マジか

1:43 AM

そんな簡単な死あるの知らなかった。

コンパイルまでは問題なくてアクセスすると死んじゃうんですよね。。

これJavaのコードでたまに見るパターンぽい

C++でもやるね

7:33 AM

Swiftの場合 protocol の中で Self が使えるから、不要な事が多い。

前までこれコンパイル出来なかった気がするんだけど、今通っちゃうんですね

https://ja.wikibooks.org/wiki/More_C%2B%2B_Idioms/奇妙に再帰したテンプレートパターン(Curiously_Recurring_Template_Pattern)

%E5%A5%87%E5%A6%99%E3%81%AB%E5%86%8D%E5%B8%B0%E3%81%97%E3%81%9F%E3...

名前w

CRTP

@swift-4.2.4 -frontend -emit-syntax

import Foundation public class TestFunctionDeclDefaultArgument { func multipleArgument(argument1: Int = 1, argument2: String = "string") { } }

{"kind":"SourceFile","layout":[{"kind":"CodeBlockItemList","layout":[{"kind":"CodeBlockItem","layout":[{"kind":"ImportDecl","layout":[null,null,{"tokenKind":{"kind":"kw_import"},"leadingTrivia":[{"kind":"Newline","value":1}],"trailingTrivia":[{"kind":"Space","value":1}],"presence":"Present"},null,{"kind":"AccessPath","layout":[{"kind":"AccessPathComponent","layout":[{"tokenKind":{"kind":"identifier","text":"Foundation"},"leadingTrivia":[],"trailingTrivia":[],"presence":"Present"},null],"presence":"Present"}],"presence":"Present"}],"presence":"Present"},null],"presence":"Present"},{"kind":"CodeBlockItem","layout":[{"kind":"ClassDecl","layout":[null,{"kind":"ModifierList","layout":[{"kind":"DeclModifier","layout":[{"tokenKind":{"kind":"kw_public"},"leadingTrivia":[{"kind":"Newline","value":2}],"trailingTrivia":[{"kind":"Space","value":1}],"presence":"Present"},{"kind":"TokenList","layout":[],"presence":"Present"}],"presence":"Present"}],"presence":"Present"},{"tokenKind":{"kind":"kw_class"},"leadingTrivia":[],"trailingTrivia":[{"kind":"Space","value":1}],"presence":"Present"},{"tokenKind":{"kind":"identifier","text":"TestFunctionDeclDefaultArgument"},"leadingTrivia":[],"trailingTrivia":[{"kind":"Space","value":1}],"presence":"Present"},null,null,null,{"kind":"MemberDeclBlock","layout":[{"tokenKind":{"kind":"l_brace"},"leadingTrivia":[],"trailingTrivia":[],"presence":"Present"},{"kind":"DeclList","layout":[{"kind":"FunctionDecl","layout":[null,null,{"tokenKind":{"kind":"kw_func"},"leadingTrivia":[{"kind":"Newline","value":1},{"kind":"Space","value":4}],"trailingTrivia":[{"kind":"Space","value":1}],"presence":"Present"},{"tokenKind":{"kind":"identifier","text":"multipleArgument"},"leadingTrivia":[],"trailingTrivia":[],"presence":"Present"},null,{"kind":"FunctionSignature","layout":[{"kind":"ParameterClause","layout":[{"tokenKind":{"kind":"l_paren"},"leadingTrivia":[],"trailingTrivia":[],"presence":"Present"},{"kind":"FunctionParameterList","layout":[{"kind":"Func

stdout.txt

https://ptpb.pw/BAs-.txt/text

ああ、ある程度大きい出力で同じ内容を貼り付けようとすると、ptpb.pwが弾くのかも。

おお、なるほどね。あざすあざす

-emit-syntax用にprettyPrintが欲しくなるな。

@swift-4.2.4 import Foundation let u = NSURL()

exit status: 1 with stderr:

<stdin>:4:9: error: cannot invoke initializer for type 'NSURL' with no arguments let u = NSURL() ^ <stdin>:4:9: note: overloads for 'NSURL' exist with these partially matching parameter lists: (coder: NSCoder), (fileURLWithPath: String, isDirectory: Bool, relativeTo: URL?), (fileURLWithPath: String, relativeTo: URL?), (fileURLWithPath: String, isDirectory: Bool), (fileURLWithPath: String), (fileURLWithFileSystemRepresentation: UnsafePointer<Int8>, isDirectory: Bool, relativeTo: URL?), (string: String), (string: String, relativeTo: URL?), (dataRepresentation: Data, relativeTo: URL?), (absoluteURLWithDataRepresentation: Data, relativeTo: URL?) let u = NSURL() ^

macOS以外では正しくエラーになるのか

@swift-5.0.3 import Foundation let u = NSURL()

exit status: 1 with stderr:

<stdin>:3:9: error: cannot invoke initializer for type 'NSURL' with no arguments let u = NSURL() ^ <stdin>:3:9: note: overloads for 'NSURL' exist with these partially matching parameter lists: (coder: NSCoder), (fileURLWithPath: String, isDirectory: Bool, relativeTo: URL?), (fileURLWithPath: String, relativeTo: URL?), (fileURLWithPath: String, isDirectory: Bool), (fileURLWithPath: String), (fileURLWithFileSystemRepresentation: UnsafePointer<Int8>, isDirectory: Bool, relativeTo: URL?), (string: String), (string: String, relativeTo: URL?), (dataRepresentation: Data, relativeTo: URL?), (absoluteURLWithDataRepresentation: Data, relativeTo: URL?) let u = NSURL() ^

@swift-4.1.3 @swift-4.2.4 @swift-5.0.3

let café = "café" let index = café.utf8.index(before: café.utf8.endIndex) // The last byte. let before = String(café[..<index]) let after = String(café[index...]) print(before + after) // “café” print(after.utf8.count) // 2 bytes?!?

café 2

café 1

Swift 5.0のStringの挙動、不安になってきた… https://bugs.swift.org/browse/SR-9802

なんで2

12:34 AM

ああ、utf8で１つ戻って文字の途中に突っ込んだのか

12:35 AM

swift4では文字頭までもどったから2で、swift5はutf8の位置がモテるから1か

12:36 AM

これはこれで良いのでは？

どっちが正しいのかはおいても、挙動が変わってるのが。

やっぱり5の挙動が変に思えてきました

1:06 AM

いちどbeforeとafterはStringになってるのに

1:07 AM

afterが保持してるのはutf8の後続バイトだ

1:09 AM

StringはCharacterに分けられる場所でしか切り出せないのが良いと思う

この変更があっさり入っているという事は、この挙動をテストするコードがずっとなかったって事？

たしかにどうなんだろうトリッキーといえばトリッキーだし、いかにもテストケースにしたいやつではありますよね

探してみたけど、無さげ。

@swift-4.2.4 @swift-5.0.3

func printUnicodeScalars<S: StringProtocol>(_ string: S) { print(string.unicodeScalars.map { "\\u{\(String($0.value, radix: 16))}" }.joined()) } // https://emojipedia.org/family-man-woman-girl-boy/ let family = "\u{1f468}\u{200d}\u{1f469}\u{200d}\u{1f467}\u{200d}\u{1f466}" printUnicodeScalars(family) let utf16Index = family.utf16.index(before: family.utf16.endIndex) let utf16Before = String(family[..<utf16Index]) printUnicodeScalars(utf16Before) let utf16After = String(family[utf16Index...]) printUnicodeScalars(utf16After) printUnicodeScalars(utf16Before + utf16After) print(utf16After.utf16.count)

(edited)

\u{1f468}\u{200d}\u{1f469}\u{200d}\u{1f467}\u{200d}\u{1f466} \u{1f468}\u{200d}\u{1f469}\u{200d}\u{1f467}\u{200d}\u{fffd} \u{fffd} \u{1f468}\u{200d}\u{1f469}\u{200d}\u{1f467}\u{200d}\u{1f466} 1

(edited)

\u{1f468}\u{200d}\u{1f469}\u{200d}\u{1f467}\u{200d}\u{1f466} \u{1f468}\u{200d}\u{1f469}\u{200d}\u{1f467}\u{200d} \u{1f466} \u{1f468}\u{200d}\u{1f469}\u{200d}\u{1f467}\u{200d}\u{1f466} 2

(edited)

Swift 4以前のString.UTF16View.index(before:) は、Characterの途中のIndexを指すこともあったぽい。 (edited)

これはSwift 5のString.UTF8View.index(before:)と同等の挙動。

https://bugs.swift.org/browse/SR-9820

12:34 AM

とりあえず、Swift 4とSwift 5でString.UTF16ViewとString.UTF8View両方のindex(before:)の挙動が違う。

Swift4の場合は　末尾のU+1F466がサロゲートペアでちぎれて、どちらも表示は不正文字FFFDになるが、ちぎれたまま保持されてて、くっつけると繋がって戻る Swift5の場合は　末尾のU+1F466がペアを保ってちぎれて、どちらもCharacter境界をたもってて、countは2になっていて、くっつけるとつながって戻るという感じか (edited)

https://bugs.swift.org/browse/SR-6161 これを思い出しました。

1

1:43 AM

これも4と5で挙動がちがう。 (edited)

挙動が一貫してないよね。

Swift5においてUTF-16に限っては、Character境界までインデックスが畳み込まれる挙動が追加実装されたけど、UTF-8は不正位置でちぎれる

1:46 AM

https://forums.swift.org/t/type-safety-of-string-indices/19957

Type Safety of String Indices

SE‐0180 came up again during the review of SE‐0241, which seeks to do some damage control. I was not around during the original review of SE‐0180. I wish I was, because it has become the only accepted evolution proposal I have ever wished could be undone. I have been j...

1:46 AM

元スレも結構伸びてますね、読んでみるか

1:47 AM

ここのとこの話を見てて、どんなビューの場合でも、String.Indexを受け取った時に、内部的に左側直近の、そのビューでの要素単位の合法な境界に畳み込まれるっていうのがいいと思いました

要素ってunicodeScalar?

string.unicodeScalars[index] の場合はunicode scalar

1:48 AM

string[index]の場合はcharacter

1:49 AM

string.utf8[index]はバイト位置（あ、この場合は不正なところになりえる string.utf16[index]は2バイト境界

1:49 AM

ただ直近のCharacterまで巻き戻すのがまあまあ重そう

Swift 4までのUTF8View.IndexはUnicodeScalarの境界に合わせられていました。 @swift-4.2.4

func printUnicodeScalars<S: StringProtocol>(_ string: S) { print(string.unicodeScalars.map { "\\u{\(String($0.value, radix: 16))}" }.joined()) } // https://emojipedia.org/family-man-woman-girl-boy/ let family = "\u{1f468}\u{200d}\u{1f469}\u{200d}\u{1f467}\u{200d}\u{1f466}" printUnicodeScalars(family) let utf8Index = family.utf8.index(before: family.utf8.endIndex) let utf8Before = String(family[..<utf8Index]) printUnicodeScalars(utf8Before) let utf8After = String(family[utf8Index...]) printUnicodeScalars(utf8After) printUnicodeScalars(utf8Before + utf8After) print(utf8After.utf8.count)

\u{1f468}\u{200d}\u{1f469}\u{200d}\u{1f467}\u{200d}\u{1f466} \u{1f468}\u{200d}\u{1f469}\u{200d}\u{1f467}\u{200d} \u{1f466} \u{1f468}\u{200d}\u{1f469}\u{200d}\u{1f467}\u{200d}\u{1f466} 4

Swift 5ではUTF16View.IndexがUnicodeScalarの境界に合わせられる様になった。

内部表現ではない方のindexが、unicode scalar境界に畳み込まれるという意味では

1:53 AM

一貫している？

UnicodeScalar boundaries are: respected by: String.UTF8View.index(before:) on Swift 4 String.UTF16View.index(before:) on Swift 5 not respected by String.UTF16View.index(before:) on Swift 4 String.UTF8View.index(before:) on Swift 5

1:55 AM

UTF-16からUTF-8へ切り替わった事で、挙動も入れ替わってる。

内部表現ではない方のindexが、unicode scalar境界に畳み込まれる という意味では 一貫している？

そう言える。ランタイムの内部表現に依存してるかどうかまでは確かめてないですが。

2:08 AM

Swift 5で試した限り、swift-corelibs-foundationだと内部表現をUTF-16にする方法は見つからず。Apple Platformだと一部のNSString APIを使うとUTF-16になる。

ああ、そうすると実行時に変化もするのか・・

以前試した時は、macOSでString.init(contentsOfFile:encoding:)を使うと内部表現がUTF-16になってた。

2:21 AM

見分け方は、String.UTF8View.withContiguousStorageIfAvailable(_:)を使った時、渡したクロージャが呼ばれたら内部表現はUTF-8、呼ばれなかったらUTF-16

Swift 5のString.UnicodeScalarsView.map(_:)でクラッシュ https://bugs.swift.org/browse/SR-9822 @swift-4.2.4 @swift-5.0.3 -frontend -repl

// https://emojipedia.org/family-man-woman-girl-boy/ let family = "\u{1f468}\u{200d}\u{1f469}\u{200d}\u{1f467}\u{200d}\u{1f466}" let utf8Index = family.utf8.index(before: family.utf8.endIndex) let utf8Before = String(family[..<utf8Index]) _ = utf8Before.unicodeScalars.map { $0 }

(edited)

// family : String = "👨‍👩‍👧‍👦" // utf8Index : String.UTF8View.Index = Swift.String.Index(_compoundOffset: 39, _utf8Buffer: Swift._ValidUTF8Buffer<Swift.UInt32>(_biasedBits: 2811404529), _graphemeStrideCache: 0) // utf8Before : String = "👨‍👩‍👧‍"

(edited)

exit status: 11 with stderr:

Stack dump: 0. Program arguments: swift -frontend -I /Libraries/.build/x86_64-unknown-linux/debug -L /Libraries/.build/x86_64-unknown-linux/debug -lLibraries -DDEBUG -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include/module.modulemap -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include/module.modulemap -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOZlib.build/module.modulemap -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOZlib/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOHTTPParser.build/module.modulemap -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOHTTPParser/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOSHA1.build/module.modulemap -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOSHA1/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOAtomics.build/module.modulemap -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOAtomics/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIODarwin.build/module.modulemap -I /Libraries/.build/checkouts/swift-nio/Sources/CNIODarwin/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOLinux.build/module.modulemap -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOLinux/include -Xcc -fmodule-map-file=/Libraries/.build/checkouts/swift-nio-zlib-support/module.modulemap -module-cache-path /Libraries/.build/x86_64-unknown-linux/debug/ModuleCache -repl 1. while processing REPL source: // https://emojipedia.org/family-man-woman-girl-boy/ let family = "\u{1f468}\u{200d}\u{1f469}\u{200d}\u{1f467}\u{200d}\u{1f466}" let utf8Index = family.utf8.index(before: family.utf8.endIndex) [0

(edited)

stderr.txt

https://ptpb.pw/1xjz.txt/text

ForumのType Safety of String IndicesについてのMichael_Ilsemanさんの返答を読んでると、UTF8View.index(before:)とUTF16View.index(before:)は使ってはいけないモノだと言われている様に思えてくる。

ランタイムの内部表現に依存してるかどうかまでは確かめてないですが。 依存してるぽい。

3:24 AM

このコードをmacOSで実行すると、stringUTF16Backendを使うとtest()内でクラッシュする。

import Foundation #if !compiler(>=5) private extension String.UTF8View { func withContiguousStorageIfAvailable<R>(_ body: (UnsafeBufferPointer<Element>) throws -> R) rethrows -> R? { return nil } } #endif extension String { var nativeEncoding: Encoding { return utf8.withContiguousStorageIfAvailable({$0}) != nil ? .utf8 : .utf16 } } func printUTF16<S: StringProtocol>(_ string: S, label: String) { print(label, string.utf16.map { "\\u{\(String($0, radix: 16))}" }.joined()) } func test(_ string: String) { let utf16Index = string.utf16.index(before: string.utf16.endIndex) let utf16Before = string[..<utf16Index] printUTF16(utf16Before, label: "before:") let utf16After = string[utf16Index...] printUTF16(utf16After, label: "after:") printUTF16(utf16Before + utf16After, label: "joined:") print(utf16After.utf8.count) print(utf16After.utf16.count) } // https://emojipedia.org/family-man-woman-girl-boy/ let string = "\u{1f468}\u{200d}\u{1f469}\u{200d}\u{1f467}\u{200d}\u{1f466}" print(string.nativeEncoding) test(string) let tempfileURL = URL(fileURLWithPath: NSTemporaryDirectory()).appendingPathComponent(UUID().uuidString) try string.write(to: tempfileURL, atomically: true, encoding: .utf16) let stringUTF16Backend = try String(contentsOfFile: tempfileURL.path) print(stringUTF16Backend.nativeEncoding) test(stringUTF16Backend) defer { try! FileManager.default.removeItem(at: tempfileURL) }

(edited)

String.UTF8View, String.UTF16Viewを使ったString.Indexの操作は、UnicodeScalarsの境界に合わないIndexを作る場合がある。(仕様)
Swift 5はUnicodeScalarsの境界に合わないIndexを使ったRangeでSubstringを作ると、クラッシュする場合がある。(バグ)

(edited)

4:11 AM

そんな感じか。

@rintaroさんの https://bugs.swift.org/browse/SR-6161 これを思い出しました。 を読んで、試して、ようやく理解したぽい。問題となるのはindex(before:)の挙動ではなく、String, UTF8View, UTF16Viewそれぞれのsubscriptがunicode scalarsの境界に合わないIndexを持つRangeをどう扱うか、が変わっている事なのね。 (edited)

SR-6161の結果がSwift 4とSwift 5で変わってしまうのは、境界に合わないIndexが指すものはU+FFFDとして扱わなければいけないのだけど、境界に合う合わないの判定がUnicode Scalarを基に行われていないからな気がする。

@swift-4.2.4 import Foundation print(ProcessInfo.processInfo.environment["SWIFT_VERSION"]!)

4.2.2-RELEASE

@swift-4.2.4 import Foundation [1, 2, 3] .map { ($0, $0) } .forEach { print("-") } [1, 2, 3] .map { ($0, $0) } .forEach { print($1) } (edited)

- - - 1 2 3stderr:<stdin>:5:12: warning: expression of type '(Int, Int)' is unused .map { ($0, $0) } ^~~~~~~~ (edited)

expression of type '(Int, Int)' is unused このワーニングが RxSwift の map でも出てきて驚いた

（subscribe で値を参照したら正しく警告が消えた）

@swift-4.2.4 -Xfrontend -emit-sil [1, 2, 3] .map { ($0, $0) } .forEach { print("-") }

sil_stage canonical import Builtin import Swift import SwiftShims // main sil @main : $@convention(c) (Int32, UnsafeMutablePointer<Optional<UnsafeMutablePointer<Int8>>>) -> Int32 { bb0(%0 : $Int32, %1 : $UnsafeMutablePointer<Optional<UnsafeMutablePointer<Int8>>>): %2 = metatype $@thin Array<Int>.Type // user: %25 %3 = integer_literal $Builtin.Word, 3 // user: %5 // function_ref _allocateUninitializedArray<A>(_:) %4 = function_ref @$Ss27_allocateUninitializedArrayySayxG_BptBwlF : $@convention(thin) <τ_0_0> (Builtin.Word) -> (@owned Array<τ_0_0>, Builtin.RawPointer) // user: %5 %5 = apply %4<Int>(%3) : $@convention(thin) <τ_0_0> (Builtin.Word) -> (@owned Array<τ_0_0>, Builtin.RawPointer) // users: %9, %6, %8 %6 = tuple_extract %5 : $(Array<Int>, Builtin.RawPointer), 0 // users: %25, %7 retain_value %6 : $Array<Int> // id: %7 %8 = tuple_extract %5 : $(Array<Int>, Builtin.RawPointer), 1 // user: %10 release_value %5 : $(Array<Int>, Builtin.RawPointer) // id: %9 %10 = pointer_to_address %8 : $Builtin.RawPointer to [strict] $*Int // users: %13, %20, %15 %11 = integer_literal $Builtin.Int64, 1 // user: %12 %12 = struct $Int (%11 : $Builtin.Int64) // user: %13 store %12 to %10 : $*Int // id: %13 %14 = integer_literal $Builtin.Word, 1 // user: %15 %15 = index_addr %10 : $*Int, %14 : $Builtin.Word // user: %18 %16 = integer_literal $Builtin.Int64, 2 // user: %17 %17 = struct $Int (%16 : $Builtin.Int64) // user: %18 store %17 to %15 : $*Int // id: %18 %19 = integer_literal $Builtin.Word, 2 // user: %20 %20 = index_addr %10 : $*Int, %19 : $Builtin.Word // user: %23 %21 = integer_literal $Builtin.Int64, 3 // user: %22 %22 = struct $Int (%21 : $Builtin.Int64) // user: %23 store %22 to %20 : $*Int // id: %23 // function_ref specialized Array.init(arrayLiter

stdout.txt

https://ptpb.pw/JQxa.txt/text

stderr.txt

https://ptpb.pw/tfMe.txt/text

map { ($0, $0) } が Array<Void> を返してると推論してる

7:06 AM

僕には意味が分かりません

どうなってるんだこれ

forEachのクロージャが引数なしで()->Void扱いでmapの結果が[Void]と推論されているのでは？ (edited)

@swift-4.2.4 [1, 2, 3] .map { return ($0, $0) } .forEach { print("-") }

- - -stderr:<stdin>:3:18: warning: expression of type '(Int, Int)' is unused .map { return ($0, $0) } ^~~~~~~~

明示的に return してもだめという

forEach のクロージャの引数の型か。

@swift-4.2.4 [1, 2, 3] .map { return ($0, $0) } .forEach { _ in print("-") }

- - -

引数省略に明示が必要です

7:11 AM

$0無し_無しはVoidになる

Voidというか引数0個？

分かるけどそこは forEach に _ in 付けろって言ってほしい

[1, 2, 3] .map { ($0, $0) } .forEach { () in print("") } こうなってるのか (edited)

[1, 2, 3] .map { a in return (a, a) } .forEach { print("-") } これが通って [1, 2, 3] .map { a -> (Int, Int) in return (a, a) } .forEach { print("-") } これがだめなのが謎

それは返り値の型を明示するからは

7:13 AM

mapが(Int, Int)でforEachは () だから矛盾

明示しない場合上のreturn で返してるのはどうなるんです？

[1, 2, 3] .map { a -> Void in return (a, a) } .forEach { print("-") }

return ; ($0, $0) な解釈では

7:14 AM

どうやったらそうなるんだって感じだけど

ん？返り値Voidで返り値あっても通るのか

func a(_ f: () -> Void) {} a { return 333 }

タプルの場合のみとおる？

@swift-4.2.4 var a: () -> Void = { return (1, 2) } (edited)

stderr:<stdin>:3:10: warning: expression of type '(Int, Int)' is unused return (1, 2) ^~~~~~ (edited)

関数だとだめ

7:15 AM

クロージャを書く時だけいける？

カオスだ

新発見か？

クロージャだけ通る

知らなかった

クロージャはreturn省略可能でfuncは省略不可、その辺りに何かありそう

@swift-4.2.4 let a: () -> Int = { return 3 } let b: () -> Void = a (edited)

exit status: 1 with stderr:<stdin>:3:21: error: cannot convert value of type '() -> Int' to specified type '() -> Void' let b: () -> Void = a ^ (edited)

type checkerのバグな気がしてきた

7:18 AM

クロージャの返り値の評価のときだけ void への暗黙アップキャストが存在してる？

expression of type '(Int, Int)' is unused だから暗黙変換系ではない

いや、それは前段のmap側だから　後段のクロージャが

7:19 AM

[1, 2, 3] .map { a -> Void in return (a, a) } .forEach { print("-") }

foEachのクロージャによってmapの返り血はVoidに推論されている

@swift-4.2.4 [1, 2, 3] .map { a -> Void in return (a, a) } .forEach { print("-") }

- - -stderr:<stdin>:3:32: warning: expression of type '(Int, Int)' is unused .map { a -> Void in return (a, a) } ^~~~~~

そのうえで、return (a,a)が謎解釈で return ; (a, a)になってるんだと思うよ (edited)

7:20 AM

@swift-4.2.4 func a() -> Void { return; (1, 1) }

stderr:

<stdin>:2:28: warning: expression of type '(Int, Int)' is unused func a() -> Void { return; (1, 1) } ^~~~~~ <stdin>:2:28: warning: code after 'return' will never be executed func a() -> Void { return; (1, 1) } ^

いやそれだと

7:20 AM

うむ

7:20 AM

returnの後ろに死んだ文があることになるはずだから

エラーメッセージ同じぽいし

will never be executedが出てるから違う

片方だけでてる

7:21 AM

@swift-4.2.4 func fatal() -> Int { fatalError() } [1, 2, 3] .map { a -> Void in return (a, fatal()) } .forEach { print("-") }

exit status: 4 with stderr:

<stdin>:4:32: warning: expression of type '(Int, Int)' is unused .map { a -> Void in return (a, fatal()) } ^~~~~~~~~~~~ Fatal error: : file <stdin>, line 2 Current stack trace: 0 libswiftCore.so 0x00007fce9010bfa0 _swift_stdlib_reportFatalErrorInFile + 215 1 libswiftCore.so 0x00007fce8fe645c1 <unavailable> + 1504705 2 libswiftCore.so 0x00007fce900a10c2 <unavailable> + 3850434 3 libswiftCore.so 0x00007fce8fe63d0a <unavailable> + 1502474 4 libswiftCore.so 0x00007fce900a0f5c <unavailable> + 3850076 5 libswiftCore.so 0x00007fce8fe63d0a <unavailable> + 1502474 6 libswiftCore.so 0x00007fce8fffda28 <unavailable> + 3181096 7 libswiftCore.so 0x00007fce8fe635a9 <unavailable> + 1500585 12 libswiftCore.so 0x00007fce8fe27640 Collection.map<A>(_:) + 527 14 swift 0x0000000001043efe <unavailable> + 12861182 15 swift 0x0000000001048022 <unavailable> + 12877858 16 swift 0x00000000004f8b42 <unavailable> + 1018690 17 swift 0x00000000004df0bb <unavailable> + 913595 18 swift 0x00000000004da3f0 <unavailable> + 893936 19 swift 0x000000000048a348 <unavailable> + 566088 20 libc.so.6 0x00007fce92ab0740 __libc_start_main + 240 21 swift 0x0000000000488009 <unavailable> + 557065 #0 0x000000000410ac94 PrintStackTraceSignalHandler(void*) (/usr/bin/swift+0x410ac94) #1 0x0000000004108b22 llvm::sys::RunSignalHandlers() (/usr/bin/swift+0x4108b22) #2 0x000000000410ae42 SignalHandler(int) (/usr/bin/swift+0x410ae42) #3 0x00007fce94386390 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x11390) #4 0x0

stderr.txt

https://ptpb.pw/ipDg.txt/text

おー

7:22 AM

実行はされてる

なるほどｗ

7:26 AM

とりあえずbugs行きっぽいな

7:26 AM

@swift-main @swift-5.0.3 [1, 2, 3] .map { a -> Void in return (a, a) } .forEach { print("-") }

- - -stderr:<stdin>:3:32: warning: expression of type '(Int, Int)' is unused .map { a -> Void in return (a, a) } ^~~~~~

@swift-4.2.4 let a = { () -> Void in return 333 }

stderr:<stdin>:3:12: warning: integer literal is unused return 333 ^~~

シンプルにこういうことだよね

そう

もしこれがそもそもコンパイルエラーになっていれば

7:28 AM

[1, 2, 3] .map { return ($0, $0) } .forEach { print("-") }

7:28 AM

これはコンパイルエラーになるから

7:28 AM

それでよかった

どっちにエラーを出すかは結構難しい

7:29 AM

.forEach { print("-") } こいつはこの行だけで引数Voidが決定的だから

.map { } も決定的でしょ、　返り値 (A, A) (edited)

まあ今はバグってるからそっちにエラーが出るのはわかる

なるほど

面白い

@swift-4.2.4 let a = { () -> Void in return 333 }

stderr:<stdin>:2:12: warning: integer literal is unused return 333 ^~~

ボットのエラーメッセージに含まれる行番号が1つズレていたのを修正しました。

single expression closure ではクロージャの返値が Void の時でも、非Void のexpressionを書ける
{ ... in return <expr> } は single expression closure と解釈される

という事実が重なって起きてる不幸ですね (edited)

5:48 PM

let _ : () -> Void = { return "test" } が通るの自体はもはや仕様なので、エラー診断のバグという扱いになると思います。

なるほど、コンパイラはそういう気持ちなのか

1

@swift-4.2.4 import Foundation print(ProcessInfo.processInfo.environment["SWIFT_VERSION"]!)

4.2.3-RELEASE

@swift-4.2.4

import Foundation class Entity<Id: Hashable, Props> { let id: Id let data: Props init(id: Id, data: Props) { self.id = id self.data = data } } class User: Entity<User.Id, User.Props> { struct Id: Hashable { } struct Props { var name: String } } let user = User(id: .init(), data: .init(name: "user_name")) print(user, user.data.name)

main.User user_name

@swift-main

func defaultValue<T>() -> T { fatalError() } struct S<T> { let value1: T = defaultValue() let value2: Int } func main() { _ = S<Int>(value2: 2) }

(edited)

exit status: 134 with stderr:

swift: /home/buildnode/jenkins/workspace/oss-swift-package-linux-ubuntu-16_04/swift/lib/SILGen/SILGenConstructor.cpp:146: void emitImplicitValueConstructor(swift::Lowering::SILGenFunction &, swift::ConstructorDecl *): Assertion `fieldTy->isEqual(field->getParentInitializer()->getType()) && "Checked by sema"' failed. Stack dump: 0. Program arguments: /usr/bin/swift -frontend -interpret - -disable-objc-interop -I /Libraries/.build/x86_64-unknown-linux/debug -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOZlib/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOHTTPParser/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOSHA1/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOAtomics/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIODarwin/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOLinux/include -module-cache-path /Libraries/.build/x86_64-unknown-linux/debug/ModuleCache -D DEBUG -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOZlib.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOHTTPParser.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOSHA1.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOAtomics.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIODarwin.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOLinux.build/module.modulemap -Xcc -fmodule-map-file=

(edited)

@swift-4.2.4 class Some { lazy var thing = 1 } class Some2: Some { override lazy var thing = 2 } print(Some2().thing) Cannot (Cannotとは言っていない)

1

2stderr:

<stdin>:6:23: warning: cannot override with a stored property 'thing' override lazy var thing = 2 ^ <stdin>:2:14: note: attempt to override property here lazy var thing = 1 ^

↑なんですが、要はコンパイラが作るlazyに値を渡すためのfunctionはオーバーライド可能だったってことですかね

5:24 AM

結構便利なんですがこれw

stored propertyはそもそもオーバライド可能だから (edited)

5:30 AM

継承先の方のlazyが特殊なところ？

@swift-5.0.3 @swift-4.2.4

import Foundation protocol Target { } protocol Foo { associatedtype Bar: Target } class TargetBase<X>: Target {} class Impl<X, TargetType>: Foo where TargetType: TargetBase<X> { typealias Bar = TargetType }

(edited)

no output (edited)

exit status: 134 with stderr:

swift: /home/buildnode/jenkins/workspace/oss-swift-4.2-package-linux-ubuntu-16_04/swift/lib/AST/Type.cpp:3215: swift::Type swift::TypeBase::getSuperclassForDecl(const swift::ClassDecl *): Assertion `nominalDecl && "expected nominal type here"' failed. #0 0x000000000410acb4 PrintStackTraceSignalHandler(void*) (/usr/bin/swift+0x410acb4) #1 0x0000000004108b42 llvm::sys::RunSignalHandlers() (/usr/bin/swift+0x4108b42) #2 0x000000000410ae62 SignalHandler(int) (/usr/bin/swift+0x410ae62) #3 0x00007fefce714390 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x11390) #4 0x00007fefcce53428 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x35428) #5 0x00007fefcce5502a abort (/lib/x86_64-linux-gnu/libc.so.6+0x3702a) #6 0x00007fefcce4bbd7 (/lib/x86_64-linux-gnu/libc.so.6+0x2dbd7) #7 0x00007fefcce4bc82 (/lib/x86_64-linux-gnu/libc.so.6+0x2dc82) #8 0x00000000017ff77c swift::TypeBase::getSuperclassForDecl(swift::ClassDecl const*) (/usr/bin/swift+0x17ff77c) #9 0x00000000017e357a swift::ProtocolConformance::subst(swift::Type, llvm::function_ref<swift::Type (swift::SubstitutableType*)>, llvm::function_ref<llvm::Optional<swift::ProtocolConformanceRef> (swift::CanType, swift::Type, swift::ProtocolType*)>) const (/usr/bin/swift+0x17e357a) #10 0x00000000013c9607 swift::ConformanceChecker::ensureRequirementsAreSatisfied(bool)::GatherConformancesListener::satisfiedConformance(swift::Type, swift::Type, swift::ProtocolConformanceRef) (/usr/bin/swift+0x13c9607) #11 0x00000000013a7582 swift::TypeChecker::checkGenericArguments(swift::DeclContext*, swift::SourceLoc, swift::SourceLoc, swift::Type, swift::ArrayRefView<swift::Type, swift::GenericTypeParamType*, swift::GenericTypeParamType* swift::staticCastHelper<swift::GenericTypeParamType>(swift::Type const&), true>, llvm::ArrayRef<swift::Requirement>, llvm::function_ref<swift::Type (swift::SubstitutableType*)>, llvm::function_ref<llvm::Optional<swift::ProtocolConformanceRef> (swift::CanType, swift::Type, swift::Prot

@swift-main let a = "abc" let b = "cde" dump(b.difference(from: a)) (edited)

▿ Swift.CollectionDifference<Swift.Character> ▿ insertions: 2 elements ▿ Swift.CollectionDifference<Swift.Character>.Change.insert ▿ insert: (3 elements) - offset: 1 - element: "d" - associatedWith: nil ▿ Swift.CollectionDifference<Swift.Character>.Change.insert ▿ insert: (3 elements) - offset: 2 - element: "e" - associatedWith: nil ▿ removals: 2 elements ▿ Swift.CollectionDifference<Swift.Character>.Change.remove ▿ remove: (3 elements) - offset: 0 - element: "a" - associatedWith: nil ▿ Swift.CollectionDifference<Swift.Character>.Change.remove ▿ remove: (3 elements) - offset: 1 - element: "b" - associatedWith: nil

(edited)

@swift-5.0.3 @swift-main struct S { func f() -> Self { return self } }

no output

exit status: 1 with stderr:

<stdin>:2:17: error: 'Self' is only available in a protocol or as the result of a method in a class; did you mean 'S'? func f() -> Self { return self } ^~~~ S

あれ、まだ入ってない？

12:24 PM

マージされてたような

5.0には入ってないね。

あ、nightlyは通ったのか。

12:25 PM

お～　これほしかったので密かに喜んでいた

Self書けるのいいですね。

@swift-5.0.3

class Base { let val: String = "string" } class Sub: Base {} let object = Sub() print(object[keyPath: \Base.val]) // "string" print(object[keyPath: \Sub.val]) // Crash!

string string

@swift-4.2.4

class Base { let val: String = "string" } class Sub: Base {} let object = Sub() print(object[keyPath: \Base.val]) // "string" print(object[keyPath: \Sub.val]) // Crash!

string string

@swift-main

class Base { let val: String = "string" } class Sub: Base {} let object = Sub() print(object[keyPath: \Base.val]) // "string" print(object[keyPath: \Sub.val]) // Crash!

string string

@swift-4.0.3 @swift-4.1.3 @swift-4.2.4 @swift-5.0.3 protocol P { associatedtype X } struct S<X>: P { } (edited)

no output (edited)

exit status: 1 with stderr:

<stdin>:6:8: error: type 'S<X>' does not conform to protocol 'P' struct S<X>: P { ^ <stdin>:2:20: note: protocol requires nested type 'X'; do you want to add it? associatedtype X ^

(edited)

no output

型パラと同名assoctypeの束縛できるようになってる！！！！

1:53 AM

うれしい！

@swift-main

import Foundation let kp = \UUID.uuid let writable = kp as! WritableKeyPath<UUID, uuid_t> var uuid = UUID() print(uuid) var newUUID: uuid_t = (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0) uuid[keyPath: writable] = newUUID print(uuid)

(edited)

A1717B4D-EE97-460A-B7C6-1149A2E2561A 00000000-0000-0000-0000-000000000000 (edited)

@swift-4.2.4 @swift-5.0.3

protocol ProtoA {} protocol ProtoB { associatedtype T : ProtoA var stuff: Int { get } } extension ProtoB { var stuff: Int { return 0 } } class Foo<X: ProtoA> : ProtoB { typealias T = X }

no output

exit status: 134 with stderr:

swift: /home/buildnode/jenkins/workspace/oss-swift-5.0-package-linux-ubuntu-16_04/swift/lib/AST/ProtocolConformance.cpp:77: swift::ProtocolDecl *swift::ProtocolConformanceRef::getRequirement() const: Assertion `!isInvalid()' failed. Stack dump: 0. Program arguments: /usr/bin/swift -frontend -interpret - -disable-objc-interop -I /Libraries/.build/x86_64-unknown-linux/debug -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOZlib/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOHTTPParser/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOSHA1/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOAtomics/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIODarwin/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOLinux/include -module-cache-path /Libraries/.build/x86_64-unknown-linux/debug/ModuleCache -D DEBUG -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOZlib.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOHTTPParser.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOSHA1.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOAtomics.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIODarwin.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOLinux.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/checkouts/swift-nio-zlib-support/module.modulemap -module-name main

@swift-4.2.4 @swift-5.0.3 @swift-main

protocol ProtoA {} protocol ProtoB { associatedtype T : ProtoA func stuff() -> Int } extension ProtoB { func stuff() -> Int { return 0 } } class Foo<X: ProtoA> : ProtoB { typealias T = X }

no output

exit status: 134 with stderr:

swift: /home/buildnode/jenkins/workspace/oss-swift-5.0-package-linux-ubuntu-16_04/swift/lib/AST/ProtocolConformance.cpp:77: swift::ProtocolDecl *swift::ProtocolConformanceRef::getRequirement() const: Assertion `!isInvalid()' failed. Stack dump: 0. Program arguments: /usr/bin/swift -frontend -interpret - -disable-objc-interop -I /Libraries/.build/x86_64-unknown-linux/debug -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOZlib/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOHTTPParser/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOSHA1/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOAtomics/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIODarwin/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOLinux/include -module-cache-path /Libraries/.build/x86_64-unknown-linux/debug/ModuleCache -D DEBUG -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOZlib.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOHTTPParser.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOSHA1.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOAtomics.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIODarwin.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOLinux.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/checkouts/swift-nio-zlib-support/module.modulemap -module-name main

exit status: 134 with stderr:

swift: /home/buildnode/jenkins/workspace/oss-swift-package-linux-ubuntu-16_04/swift/lib/AST/ProtocolConformance.cpp:77: swift::ProtocolDecl *swift::ProtocolConformanceRef::getRequirement() const: Assertion `!isInvalid()' failed. Stack dump: 0. Program arguments: /usr/bin/swift -frontend -interpret - -disable-objc-interop -I /Libraries/.build/x86_64-unknown-linux/debug -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOZlib/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOHTTPParser/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOSHA1/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOAtomics/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIODarwin/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOLinux/include -module-cache-path /Libraries/.build/x86_64-unknown-linux/debug/ModuleCache -D DEBUG -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOZlib.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOHTTPParser.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOSHA1.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOAtomics.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIODarwin.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOLinux.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/checkouts/swift-nio-zlib-support/module.modulemap -module-name main -lL

ぬう、ログのアップローダとして使ってた https://ptpb.pw が無くなってるな…

無くなってるはすごいｗ

3:37 AM

跡形もない・・

https://github.com/ptpb/pb/issues/246 割と最近だった

ptpb.pw permanent shutdown · Issue #246 · ptpb/pb

TL;DR: coin miners are assholes, ruining this great service for everyone Due to continued write and egress abuse, ptpb.pw is now ~permanently shut down. The current pb implementation has always bee...

ちょうどそれ読んでた。

3:46 AM

https://file.io へ戻しました。 (edited)

3:50 AM

file.io は一度開いたurlは無くなるんだよね。(最初に作った時は知らなかった)

3:52 AM

ゆる募) アップロードしたファイルをブラウザ内で見られるアップローダの情報。 (edited)

@swift-5.0.3 let hello: Result<String, Error> = .success("Hello Swift 5!") print(try! hello.get()) (edited)

Hello Swift 5! (edited)

@swift-main let array = Array<Int>(unsafeUninitializedCapacity: 10) { for i in 0..<5 { $0[i] = i } $1 = 5 } dump(array)

1

▿ 5 elements - 0 - 1 - 2 - 3 - 4

@swift-4.2.4 @swift-5.0.3

import Foundation class _Foo { } protocol BarType { typealias BaseFoo = _Foo } class Bar: BarType { class Foo: BaseFoo {} } class FooImpl: Bar.Foo { } print(FooImpl())

(edited)

exit status: 1 with stderr:<unknown>:0: error: 'super' members cannot be referenced in a root class (edited)

main.FooImpl (edited)

@swift-4.2.4 import Foundation print(ProcessInfo.processInfo.environment["SWIFT_VERSION"]!)

4.2.4-RELEASE

~~しばらくSwift50, SwiftNightly, SwiftTensorFlowはオフラインになりがちとなります。~~ メンテナンス終わりました。 (edited)

@swift-5.0.3

protocol Q {} protocol P { associatedtype T : Q } class C<T> : P where T : Q {} func foo<U, T>(_: U, _: T) where U : C<T>, U : P {}

(edited)

exit status: 1 with stderr:

<stdin>:7:46: warning: redundant conformance constraint 'U': 'P' func foo<U, T>(_: U, _: T) where U : C<T>, U : P {} ^ <stdin>:7:36: note: conformance constraint 'U': 'P' implied here func foo<U, T>(_: U, _: T) where U : C<T>, U : P {} ^ <stdin>:7:38: error: type 'T' does not conform to protocol 'Q' func foo<U, T>(_: U, _: T) where U : C<T>, U : P {} ^

(edited)

@swift-main

protocol Q {} protocol P { associatedtype T : Q } class C<T> : P where T : Q {} func foo<U, T>(_: U, _: T) where U : C<T>, U : P {}

(edited)

exit status: 1 with stderr:

<stdin>:7:46: warning: redundant conformance constraint 'U': 'P' func foo<U, T>(_: U, _: T) where U : C<T>, U : P {} ^ <stdin>:7:36: note: conformance constraint 'U': 'P' implied here func foo<U, T>(_: U, _: T) where U : C<T>, U : P {} ^ <stdin>:7:38: error: type 'T' does not conform to protocol 'Q' func foo<U, T>(_: U, _: T) where U : C<T>, U : P {} ^

(edited)

@swift-4.2.4

protocol Q {} protocol P { associatedtype T : Q } class C<T> : P where T : Q {} func foo<U, T>(_: U, _: T) where U : C<T>, U : P {}

stderr:

<stdin>:7:46: warning: redundant conformance constraint 'U': 'P' func foo<U, T>(_: U, _: T) where U : C<T>, U : P {} ^ <stdin>:7:36: note: conformance constraint 'U': 'P' implied here func foo<U, T>(_: U, _: T) where U : C<T>, U : P {} ^

@swift-4.2.4

protocol Q {} protocol P { associatedtype T : Q } class C<T> : P where T : Q {} func foo<U, T>(_: U, _: T) where U : P, U : C<T> {}

stderr:

<stdin>:6:36: warning: redundant conformance constraint 'U': 'P' func foo<U, T>(_: U, _: T) where U : P, U : C<T> {} ^ <stdin>:6:43: note: conformance constraint 'U': 'P' implied here func foo<U, T>(_: U, _: T) where U : P, U : C<T> {} ^

@swift-main

protocol Q {} protocol P { associatedtype T : Q } class C<T> : P where T : Q {} func foo<U, T>(_: U, _: T) where U : P, U : C<T> {}

stderr:

<stdin>:6:36: warning: redundant conformance constraint 'U': 'P' func foo<U, T>(_: U, _: T) where U : P, U : C<T> {} ^ <stdin>:6:43: note: conformance constraint 'U': 'P' implied here func foo<U, T>(_: U, _: T) where U : P, U : C<T> {} ^

@swift-5.0.3 let fn: @pseudogeneric () -> () = {}

no output

草 https://twitter.com/slava_pestov/status/1113294866178555904

Slava Pestov (@slava_pestov)

The Swift compiler accepts this code: let fn: @pseudogeneric () -> () = {} (This is a bug; @pseudogeneric is only meant for SIL mode, but due to an oversight it’s accepted and ignored during normal parsing too)

@swift-5.0.3 @swift-main @swift-4.2.4

public protocol P1 { associatedtype X } struct A { } protocol P2: P1 { associatedtype X = A func foo() } public struct B {} extension B: P2 { }

(edited)

exit status: 134 with stderr:

<stdin>:15:1: error: type 'B' does not conform to protocol 'P2' extension B: P2 { ^ Unhandled Decl kind UNREACHABLE executed at /home/buildnode/jenkins/workspace/oss-swift-5.0-package-linux-ubuntu-16_04/swift/lib/AST/DeclContext.cpp:893! Stack dump: 0. Program arguments: /usr/bin/swift -frontend -interpret - -disable-objc-interop -I /Libraries/.build/x86_64-unknown-linux/debug -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOHTTPParser/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOSHA1/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOAtomics/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIODarwin/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOLinux/include -module-cache-path /Libraries/.build/x86_64-unknown-linux/debug/ModuleCache -D DEBUG -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOHTTPParser.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOSHA1.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOAtomics.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIODarwin.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOLinux.build/module.modulemap -module-name main -lLibraries /usr/bin/swift[0x462b784] /usr/bin/swift[0x4629550] /usr/bin/swift[0x462b932] /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7fdd299dc390] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0x38)[0x7fdd2811b428] /lib/x86_64-linux-gnu/libc.so.6(ab

(edited)

stderr.txt

https://file.io/JlSdlV

exit status: 1 with stderr:

<stdin>:15:1: error: type 'B' does not conform to protocol 'P2' extension B: P2 { ^ <stdin>:10:10: note: protocol requires function 'foo()' with type '() -> ()'; do you want to add a stub? func foo() ^

exit status: 1 with stderr:

<stdin>:15:1: error: type 'B' does not conform to protocol 'P2' extension B: P2 { ^ <stdin>:15:1: error: type alias 'X' must be declared public because it matches a requirement in public protocol 'P1' extension B: P2 { ^ main.B:2:22: note: mark the type alias as 'public' to satisfy the requirement public typealias X = main.A ^ <stdin>:10:10: note: protocol requires function 'foo()' with type '() -> ()'; do you want to add a stub? func foo() ^

@swift-4.0.3 @swift-4.1.3 @swift-4.2.4 @swift-5.0.3 @swift-main

if #available(macOS 10.14, *) { print("macOS", terminator: " ") } if #available(iOS 12.3, *) { print("iOS", terminator: " ") } if #available(tvOS 12.3, *) { print("tvOS", terminator: " ") } if #available(watchOS 5.2, *) { print("watchOS", terminator: " ") }

macOS iOS tvOS watchOS

@swift-main let a = [1,2,3] let b = [2] let diff = a.difference(from: b) dump(diff)

▿ Swift.CollectionDifference<Swift.Int> ▿ insertions: 2 elements ▿ Swift.CollectionDifference<Swift.Int>.Change.insert ▿ insert: (3 elements) - offset: 0 - element: 1 - associatedWith: nil ▿ Swift.CollectionDifference<Swift.Int>.Change.insert ▿ insert: (3 elements) - offset: 2 - element: 3 - associatedWith: nil - removals: 0 elements

@swift-main let a = [1,2,3] let b = [2] let diff = a.difference(from: b) print(diff)

CollectionDifference<Int>(insertions: [Swift.CollectionDifference<Swift.Int>.Change.insert(offset: 0, element: 1, associatedWith: nil), Swift.CollectionDifference<Swift.Int>.Change.insert(offset: 2, element: 3, associatedWith: nil)], removals: [])

@swift-main class C { @inlinable func f() {} // error }

no output

@swift-4.2.4

import UIKit protocol Component: UIView { associatedtype Model func activate(with model: Model) func deactivate() } class ImageComponent: UIImageView, Component { typealias Model = UIImage func activate(with model: ImageComponent.Model) { image = model } func deactivate() { image = nil } }

exit status: 1 with stderr:<stdin>:1:8: error: no such module 'UIKit' import UIKit ^

そりゃそうだ

macサーバーほしいよね

12:16 PM

でも安くやる方法がない (edited)

機能的にはAzure PipelinesのmacOS Agentが使えるのでは？とか考えたけど、TOSに反するかどうか未確認…>macサーバー

Playground程度なら遊んでる家のMacでできるけど、AppKitはともかくUIKitはうまいこと実行するのが難しそうだな。

確かにPlaygroundは実行できてもコマンドラインバイナリとして実効する手段が無いですね。ライブラリにしてシミュレーター上でテストケースを実行するとかはできるけど

$ pbpaste import UIKit protocol Component: UIView { associatedtype Model func activate(with model: Model) func deactivate() } class ImageComponent: UIImageView, Component { typealias Model = UIImage func activate(with model: ImageComponent.Model) { image = model } func deactivate() { image = nil } $ pbpaste|swiftc -sdk $(xcrun -show-sdk-path -sdk iphonesimulator) -target x86_64-apple-ios12.2-simulator - -v Apple Swift version 5.0.1 (swiftlang-1001.0.82.4 clang-1001.0.46.5) Target: x86_64-apple-ios12.2-simulator /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift -frontend -c -primary-file - -target x86_64-apple-ios12.2-simulator -enable-objc-interop -sdk /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator12.2.sdk -color-diagnostics -module-name main -o /var/folders/kt/2mwy9b_56_7993x190pl_1fh0000gn/T/--eec0d7.o /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld /var/folders/kt/2mwy9b_56_7993x190pl_1fh0000gn/T/--eec0d7.o /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/clang/lib/darwin/libclang_rt.ios.a -syslibroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator12.2.sdk -lobjc -lSystem -arch x86_64 -L /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/iphonesimulator -ios_simulator_version_min 12.2.0 -no_objc_category_merging -o main $ ./main dyld: Library not loaded: /System/Library/Frameworks/UIKit.framework/UIKit Referenced from: /Users/norio/github/docker-swift/./main Reason: image not found [1] 91007 abort ./main

11:30 PM

swiftc -sdk $(xcrun -show-sdk-path -sdk iphonesimulator) -target x86_64-apple-ios12.2-simulatorでビルド出来る。

11:31 PM

DYLDの環境変数を調整すれば、実行も出来るかな？

おお！

11:32 PM

-Xlinkerでrpath埋め込むのでもいけそう

ふむ。

これもできた

$ swiftc -emit-library m.swift $ swiftc -L . -lm -I . a.swift -Xlinker -rpath -Xlinker /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/macosx $ ./a

11:33 PM

↑こんなふんいき

@rpathを使わずにリンクされてるから、それは効かないですね。

$ otool -L main main: /usr/lib/libobjc.A.dylib (compatibility version 1.0.0, current version 228.0.0) /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1252.250.1) /System/Library/Frameworks/UIKit.framework/UIKit (compatibility version 1.0.0, current version 61000.0.0) @rpath/libswiftCore.dylib (compatibility version 1.0.0, current version 1001.0.82) @rpath/libswiftCoreFoundation.dylib (compatibility version 1.0.0, current version 1001.0.82) @rpath/libswiftCoreGraphics.dylib (compatibility version 1.0.0, current version 1001.0.82) @rpath/libswiftCoreImage.dylib (compatibility version 1.0.0, current version 1001.0.82) @rpath/libswiftDarwin.dylib (compatibility version 1.0.0, current version 1001.0.82) @rpath/libswiftDispatch.dylib (compatibility version 1.0.0, current version 1001.0.82) @rpath/libswiftFoundation.dylib (compatibility version 1.0.0, current version 1001.0.82) @rpath/libswiftMetal.dylib (compatibility version 1.0.0, current version 1001.0.82) @rpath/libswiftObjectiveC.dylib (compatibility version 1.0.0, current version 1001.0.82) @rpath/libswiftQuartzCore.dylib (compatibility version 1.0.0, current version 1001.0.82) @rpath/libswiftUIKit.dylib (compatibility version 1.0.0, current version 1001.0.82)

UIKitの部分とかはOSに入ってる想定だから、そうなるのか。なるほど。

install_name_toolでUIKitのパスを変えたら、@rpath/libswiftCore.dylibをロードできないと言われた。

$ install_name_tool -change /System/Library/Frameworks/UIKit.framework/UIKit $(xcrun --show-sdk-platform-path --sdk iphoneos)/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot//System/Library/Frameworks/UIKit.framework/UIKit main $ ./main dyld: Library not loaded: @rpath/libswiftCore.dylib Referenced from: /Users/norio/github/docker-swift/./main Reason: image not found [1] 95202 abort ./main

(edited)

12:03 AM

で、rpathを設定したらUIKitにリンクされてるDocumentManagerをロードできないと言われ、ここで「実行時の環境を変えないとダメだ。」となりinstall_name_toolを使う方法は終了。

$ pbpaste|swiftc -sdk $(xcrun --show-sdk-path --sdk iphonesimulator) -target x86_64-apple-ios12.2-simulator - -Xlinker -rpath -Xlinker $(xcrun --show-sdk-platform-path --sdk iphoneos)/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/usr/lib/swift $ install_name_tool -change /System/Library/Frameworks/UIKit.framework/UIKit $(xcrun --show-sdk-platform-path --sdk iphoneos)/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot//System/Library/Frameworks/UIKit.framework/UIKit main $ ./main dyld: Library not loaded: /System/Library/PrivateFrameworks/DocumentManager.framework/DocumentManager Referenced from: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot//System/Library/Frameworks/UIKit.framework/UIKit Reason: image not found [1] 95440 abort ./main

バイナリをシミュレーターコンテナ？のなかで起動しないとだめそうですね

simctlはアプリケーションバンドルを起動するコマンドしかないから、chroot的な仕組みを使うしか無さげ。

playground/iosとかはどうやってるんだろうなあ

playgroundはsimulatorが動いてる。

そのシミュレーターに対して、任意のコードを送り込める所の仕組みが知りたい

アプリケーションバンドルを作成してるんじゃないかな。

最近のxcodeで1行ずつ実行できるようになったから

12:20 AM

あれはREPLな気がします昔のやつはアプリにしてIOは頑張ってるのかな

アクティビティモニタで見るとやはりアプリケーションバンドルを作成して実行してる様に見えます。

/Users/norio/Library/Developer/XCPGDevices/8B3C76D2-C6BA-49FA-A03F-76AA29054FF3/data/Containers/Bundle/Application/269B83DA-876D-4C78-8197-D055CD0E0B5C/PlayNow-20190418-86360-2.app/PlayNow-20190418

ああ、DYLD操作で実行出来た。

$ DYLD_FRAMEWORK_PATH=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/Developer/Platforms/iPhoneSimulator.platform/Developer/Library/Frameworks:/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/Library/Frameworks DYLD_FALLBACK_LIBRARY_PATH=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/usr/lib DYLD_ROOT_PATH=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot DYLD_FALLBACK_FRAMEWORK_PATH=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks DYLD_LIBRARY_PATH= ./main

おお！

rpath設定は必要。

$ pbpaste import UIKit print("UIKit") $ pbpaste|swiftc -sdk $(xcrun --show-sdk-path --sdk iphonesimulator) -target x86_64-apple-ios12.2-simulator - -Xlinker -rpath -Xlinker $(xcrun --show-sdk-platform-path --sdk iphoneos)/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/usr/lib/swift $ DYLD_FRAMEWORK_PATH=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/Developer/Platforms/iPhoneSimulator.platform/Developer/Library/Frameworks:/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/Library/Frameworks DYLD_FALLBACK_LIBRARY_PATH=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/usr/lib DYLD_ROOT_PATH=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot DYLD_FALLBACK_FRAMEWORK_PATH=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks DYLD_LIBRARY_PATH= ./main UIKit

12:41 AM

まあiPhoneのUIを実際に使うコードは動かないけど、UIKitをリンクして動かすことは出来た。

フルパスで参照してるフレームワークも差し替え効くんですね DYRD_ROOT_PATHがそれか？

DYLD_*環境変数は、playgroundが実行してるアプリケーションに渡されてたものを全部記述しました。 (edited)

なるほど！どうやって読み取ったんですか？

アクティビティモニタでプロセス名を調べps axe|grep プロセス名ですね。

12:45 AM

該当プロセスとgrepのプロセスの情報が出ます。 (edited)

psのe知りませんでしたなるほどーー

DYLD_FALLBACK_LIBRARY_PATHにusr/lib/swiftの分も追加すれば、rpath指定無しでいける。

$ ROOT_PATH=$(xcrun --show-sdk-platform-path --sdk iphoneos)/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot && \ DYLD_FALLBACK_FRAMEWORK_PATH=$ROOT_PATH/System/Library/Frameworks \ DYLD_FALLBACK_LIBRARY_PATH=$ROOT_PATH/usr/lib:$ROOT_PATH/usr/lib/swift \ DYLD_LIBRARY_PATH= \ DYLD_ROOT_PATH=$ROOT_PATH \ ./main

(edited)

なるほど

DYLD_LIBRARY_PATH= は無くても良さげ。simctlとjqで.simruntimeの場所を取得する方法に書き換えると

$ ROOT_PATH=$(xcrun simctl list -j runtimes ios|jq -r '.runtimes[-1]|.bundlePath')/Contents/Resources/RuntimeRoot && \ DYLD_FALLBACK_FRAMEWORK_PATH=$ROOT_PATH/System/Library/Frameworks \ DYLD_FALLBACK_LIBRARY_PATH=$ROOT_PATH/usr/lib:$ROOT_PATH/usr/lib/swift \ DYLD_ROOT_PATH=$ROOT_PATH \ ./main

が一番シンプルな記述かな。 (edited)

1:40 AM

まとめると

$ pbpaste import UIKit protocol Component: UIView { associatedtype Model func activate(with model: Model) func deactivate() } class ImageComponent: UIImageView, Component { typealias Model = UIImage func activate(with model: ImageComponent.Model) { image = model } func deactivate() { image = nil } } print("UIKit") $ pbpaste|swiftc -sdk $(xcrun --show-sdk-path --sdk iphonesimulator) -target x86_64-apple-ios12.2-simulator - $ ROOT_PATH=$(xcrun simctl list -j runtimes ios|jq -r '.runtimes[-1]|.bundlePath')/Contents/Resources/RuntimeRoot && \ DYLD_FALLBACK_FRAMEWORK_PATH=$ROOT_PATH/System/Library/Frameworks \ DYLD_FALLBACK_LIBRARY_PATH=$ROOT_PATH/usr/lib:$ROOT_PATH/usr/lib/swift \ DYLD_ROOT_PATH=$ROOT_PATH \ ./main UIKit

xcrun simctlってJSONで出してくれるオプションあるんですね。

うん。

1:41 AM

-target x86_64-apple-ios12.2-simulatorが決め打ちになっちゃうのだけ気持ちが悪いな。

もしbotだとしたら swift-5.0-iOS12.2

1:42 AM

みたいな名前になりそう。

あれ？swiftcへ渡す-targetって任意なの？

無くても実行できました？

あいや、-target x86_64-apple-ios12までは短く出来たけど、無くすまでは無理だった。

12無くせません？

無くすと、-Xlinkerで-ios_simulator_version_minを指定する必要が出てきそうです。

1:52 AM

$ pbpaste|swiftc -sdk $(xcrun --show-sdk-path --sdk iphonesimulator) -target x86_64-apple-ios - -v <unknown>:0: error: Swift requires a minimum deployment target of iOS 7

なるほど。なくすより10あたりを指定しておくのが良さそうかな。

ですね。

そこに数字が出てくるのはしょうがないので。

あえてバージョンを取得するなら $ jq -r .Version $(xcrun --show-sdk-path --sdk iphonesimulator)/SDKSettings.json 12.2 辺りかな。 (edited)

このiOS Simulator向けにビルドしてCLIで実行って、WWDC19以降は簡単になりそうだよね。

マジパン関係ですか？

既に/System/iOSSupport/System/Library/Frameworks/UIKit.frameworkとかMojaveにあるし。

ほんとだｗ

先の手法でビルドしたものに /System/iOSSupport を渡すとこんな感じ。

$ ROOT_PATH=/System/iOSSupport && \ DYLD_FALLBACK_FRAMEWORK_PATH=$ROOT_PATH/System/Library/Frameworks \ DYLD_FALLBACK_LIBRARY_PATH=$ROOT_PATH/usr/lib:$ROOT_PATH/usr/lib/swift \ DYLD_ROOT_PATH=$ROOT_PATH \ ./main dyld: mach-o, but built for simulator (not macOS) [1] 7681 abort DYLD_FALLBACK_FRAMEWORK_PATH=$ROOT_PATH/System/Library/Frameworks = = ./main

2:31 AM

$ otool -l /System/iOSSupport/System/Library/Frameworks/UIKit.framework/UIKit … Load command 7 cmd LC_BUILD_VERSION cmdsize 32 platform iosmac sdk 10.14 minos 12.0 ntools 1 tool ld version 450.1 … $ otool -l /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/UIKit.framework/UIKit … Load command 7 cmd LC_BUILD_VERSION cmdsize 32 platform iossimulator sdk 12.2 minos 12.2 ntools 1 tool ld version 450.1

2:31 AM

platform iosmac

iosmac

このiOS Simulator向けにビルドしてCLIで実行

正確には、macOSでUIKitを使う、か。

swift-5.1-DEVELOPMENT-SNAPSHOT-2019-04-16-aが出た。 @swift-5.1.5 -version

Swift version 5.0-dev (LLVM f961e3dd74, Swift 85a776dac0) Target: x86_64-unknown-linux-gnu

@swift-5.1.5 import Foundation print(ProcessInfo.processInfo.environment["SWIFT_VERSION"]!)

5.1-DEVELOPMENT-SNAPSHOT-2019-04-16-a

@swift-5.0.3 import Foundation print(ProcessInfo.processInfo.environment["SWIFT_VERSION"]!)

5.0.1-RELEASE

@swift-main protocol Animal {} struct Cat: Animal {} func makeAnimal() -> some Animal { return Cat() } print(makeAnimal()) (edited)

exit status: 1 with stderr:

<stdin>:3:26: error: consecutive statements on a line must be separated by ';' func makeAnimal() -> some Animal { ^ ; <stdin>:3:22: error: use of undeclared type 'some' func makeAnimal() -> some Animal { ^~~~ <stdin>:3:27: error: 'Animal' cannot be constructed because it has no accessible initializers func makeAnimal() -> some Animal { ^

マージされてるけどまだか。 https://github.com/apple/swift/pull/22072

Opaque types with resilience by jckarter · Pull Request #22072 ·...

A continuation of #21137. This branch adds "proper" resilience support. Opaque types can now enter the SIL type system, and will be able to be represented at runtime with opaque a...

@swift-5.1.5 protocol P {} extension Int : P {} func f() -> some P { return 3 } (edited)

exit status: 1 with stderr:

<stdin>:3:17: error: consecutive statements on a line must be separated by ';' func f() -> some P { return 3 } ^ ; <stdin>:3:13: error: use of undeclared type 'some' func f() -> some P { return 3 } ^~~~ <stdin>:3:18: error: 'P' cannot be constructed because it has no accessible initializers func f() -> some P { return 3 } ^

@swift-main protocol Animal {} struct Cat: Animal {} func makeAnimal() -> some Animal { return Cat() } print(makeAnimal())

exit status: 1 with stderr:

<stdin>:3:26: error: consecutive statements on a line must be separated by ';' func makeAnimal() -> some Animal { ^ ; <stdin>:3:22: error: use of undeclared type 'some' func makeAnimal() -> some Animal { ^~~~ <stdin>:3:27: error: 'Animal' cannot be constructed because it has no accessible initializers func makeAnimal() -> some Animal { ^

見るの間違えた。まだ4/16から更新されてなかった。 https://swift.org/download/#snapshots

Swift.org

Swift is a general-purpose programming language built using a modern approach to safety, performance, and software design patterns.

マージされたのが4.19か

7:31 AM

実際snapshot全然出てないな

おじゃまします

@swift-5.0.3 print("👶".unicodeScalars.first?.properties.isEmoji)

exit status: 1 with stderr:

<stdin>:1:36: error: value of type 'Unicode.Scalar.Properties' has no member 'isEmoji' print("👶".unicodeScalars.first?.properties.isEmoji)

1

@swift-main "👶".unicodeScalars.first!.properties.isEmoji (edited)

exit status: 1 with stderr:

<stdin>:1:41: error: value of type 'Unicode.Scalar.Properties' has no member 'isEmoji' "👶".unicodeScalars.first!.properties.isEmoji

(edited)

@swift-main

let scalars: [Unicode.Scalar] = ["😎", "$", "0"] for s in scalars { print(s, "-->", s.isEmoji) } // 😎 --> true // $ --> false // 0 --> true

exit status: 1 with stderr:<stdin>:3:23: error: value of type 'Unicode.Scalar' has no member 'isEmoji' print(s, "-->", s.isEmoji) ~ ^~~~~~~

https://developer.apple.com/documentation/swift/unicode/scalar/properties/3081577-isemoji

1

6:50 AM

@swift-main let scalars: [Unicode.Scalar] = ["😎", "$", "0"] scalars.forEach { dump($0.properties) } (edited)

▿ Swift.Unicode.Scalar.Properties - _scalar: "\u{0001F60E}" ▿ Swift.Unicode.Scalar.Properties - _scalar: "$" ▿ Swift.Unicode.Scalar.Properties - _scalar: "0"

(edited)

よくわからん。

ですね...

@swift-5.0.3 import Foundation print("👶".unicodeScalars.first?.properties) (edited)

Optional(Swift.Unicode.Scalar.Properties(_scalar: "\u{0001F476}"))stderr:

<stdin>:2:7: warning: expression implicitly coerced from 'Unicode.Scalar.Properties?' to 'Any' print("👶".unicodeScalars.first?.properties) <stdin>:2:36: note: provide a default value to avoid this warning print("👶".unicodeScalars.first?.properties) <stdin>:2:36: note: force-unwrap the value to avoid this warning print("👶".unicodeScalars.first?.properties) <stdin>:2:36: note: explicitly cast to 'Any' with 'as Any' to silence this warning print("👶".unicodeScalars.first?.properties)

(edited)

6:52 AM

macはできた。

Playgroundでもできるんだよねぇ

ここはできた

これじゃね？ @available(OSX 10.12.2, iOS 10.2, tvOS 10.1, watchOS 3.1.1, *) public var isEmoji: Bool { get }

https://github.com/apple/swift/blob/master/stdlib/public/core/UnicodeScalarProperties.swift#L593-L631

apple/swift

The Swift Programming Language. Contribute to apple/swift development by creating an account on GitHub.

6:56 AM

#if os(macOS) || os(iOS) || os(watchOS) || os(tvOS) // FIXME: These properties were introduced in ICU 57, but Ubuntu 16.04 comes // with ICU 55 so the values won't be correct there. Exclude them on // non-Darwin platforms for now; bundling ICU with the toolchain would resolve // this and other inconsistencies (https://bugs.swift.org/browse/SR-6076). /// A Boolean value indicating whether the scalar has an emoji /// presentation, whether or not it is the default. 略 @available(macOS 10.12.2, iOS 10.2, tvOS 10.1, watchOS 3.1.1, *) public var isEmoji: Bool { return _hasBinaryProperty(__swift_stdlib_UCHAR_EMOJI) }

1

6:56 AM

ICU57で入ったけどUbuntu16.04のICUは55だから対応してないってさ。

:naruhodo:

5.1の新しいスナップショットきたけど、someが入るのは次かな。 @swift-5.1.5 protocol Animal {} struct Cat: Animal {} func makeAnimal() -> some Animal { return Cat() } print(makeAnimal()) (edited)

1

exit status: 1 with stderr:

<stdin>:3:26: error: consecutive statements on a line must be separated by ';' func makeAnimal() -> some Animal { ^ ; <stdin>:3:22: error: use of undeclared type 'some' func makeAnimal() -> some Animal { ^~~~ <stdin>:3:27: error: 'Animal' cannot be constructed because it has no accessible initializers func makeAnimal() -> some Animal { ^

(edited)

5.1 に入るんですっけ？

はやい。次のわいわいでもう使えるかな

Trunk Development (master) の方は April 16 のままですね。

1:52 AM

@tarunon スナップショットは出てないですがマージはされてるんで自分でビルドすれば使えるんじゃないかと思います。 Bot の話の意かもですが・・・。

Botの意でした

1

swift-5.1-branchにはマージされてます。 https://github.com/apple/swift/pull/24279

[5.1] Opaque result types SE-244 by jckarter · Pull Request #2427...

おお、じゃあ5.1に入るんですね！

https://github.com/ReactiveX/RxSwift/issues/1921#issuecomment-487286983 RxSwiftのswift5のIF決めるスレでORTの話題出てきたけど、「出てきてからね」の流れになったw 認知はされてるから、もしかしたらRxSwiftにも入るかもですね

‍♂️

‍♀️RxSwift 5 Pre-Release discussion · Issu...

Hey @kzaher & others - Since RxSwift 5 is around the corner, I took the liberty of making a list of PRs/Issues that were delayed for RxSwift 5. The goal here is to see if: Any of them are e...

5:21 PM

後方互換性キツそうだなという気はする

@swift-main @swift-5.1.5 protocol Animal {} struct Cat: Animal {} func makeAnimal() -> some Animal { return Cat() } print(makeAnimal()) (edited)

Cat() (edited)

3

Cat()

@swift-main

protocol P1 {} protocol P2 {} extension Int : P1 {} extension Int : P2 {} func f() -> some P1 { return 0 } func f() -> some P2 { return 0 }

exit status: 134 with stderr:

swift: /home/buildnode/jenkins/workspace/oss-swift-package-linux-ubuntu-16_04/swift/lib/SIL/SILFunctionBuilder.cpp:112: swift::SILFunction *swift::SILFunctionBuilder::getOrCreateFunction(swift::SILLocation, swift::SILDeclRef, swift::ForDefinition_t, swift::ProfileCounter): Assertion `fn->getLoweredFunctionType() == constantType' failed. Stack dump: 0. Program arguments: /usr/bin/swift -frontend -interpret - -disable-objc-interop -module-name main 1. Swift version 5.0-dev (LLVM 082dec2e22, Swift f5ba89d372) 2. While emitting SIL for 'f()' (at <stdin>:6:1) /usr/bin/swift[0x48f7534] /usr/bin/swift[0x48f5150] /usr/bin/swift[0x48f7958] /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7fc231aaf390] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0x38)[0x7fc2301ee428] /lib/x86_64-linux-gnu/libc.so.6(abort+0x16a)[0x7fc2301f002a] /lib/x86_64-linux-gnu/libc.so.6(+0x2dbd7)[0x7fc2301e6bd7] /lib/x86_64-linux-gnu/libc.so.6(+0x2dc82)[0x7fc2301e6c82] /usr/bin/swift[0xdf2d10] /usr/bin/swift[0x893a8c] /usr/bin/swift[0x89433d] /usr/bin/swift[0x89a2ec] /usr/bin/swift[0x89b334] /usr/bin/swift[0x89b93b] /usr/bin/swift[0x508302] /usr/bin/swift[0x504b9f] /usr/bin/swift[0x4a002d] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0)[0x7fc2301d9830] /usr/bin/swift[0x49fb89]

@swift-5.1.5

protocol P1 {} protocol P2 {} extension Int : P1 {} extension Int : P2 {} func f() -> some P1 { return 0 } func f() -> some P2 { return 0 }

exit status: 134 with stderr:

swift: /home/buildnode/jenkins/workspace/oss-swift-5.1-package-linux-ubuntu-16_04/swift/lib/SIL/SILFunctionBuilder.cpp:108: swift::SILFunction *swift::SILFunctionBuilder::getOrCreateFunction(swift::SILLocation, swift::SILDeclRef, swift::ForDefinition_t, swift::ProfileCounter): Assertion `fn->getLoweredFunctionType() == constantType' failed. Stack dump: 0. Program arguments: /usr/bin/swift -frontend -interpret - -disable-objc-interop -module-name main 1. While emitting SIL for 'f()' (at <stdin>:6:1) /usr/bin/swift[0x48e9374] /usr/bin/swift[0x48e6f90] /usr/bin/swift[0x48e9798] /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7fcf15036390] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0x38)[0x7fcf13775428] /lib/x86_64-linux-gnu/libc.so.6(abort+0x16a)[0x7fcf1377702a] /lib/x86_64-linux-gnu/libc.so.6(+0x2dbd7)[0x7fcf1376dbd7] /lib/x86_64-linux-gnu/libc.so.6(+0x2dc82)[0x7fcf1376dc82] /usr/bin/swift[0xdda2b0] /usr/bin/swift[0x89124c] /usr/bin/swift[0x891afd] /usr/bin/swift[0x897d7c] /usr/bin/swift[0x898da4] /usr/bin/swift[0x8993ab] /usr/bin/swift[0x5081da] /usr/bin/swift[0x504a8f] /usr/bin/swift[0x4a000d] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0)[0x7fcf13760830] /usr/bin/swift[0x49fb89]

@swift-main

protocol P1 {} protocol P2 {} extension Int : P1 {} extension Int : P2 {} func f() -> some P1 { return Int(0) } func f() -> some P2 { return Int(0) }

exit status: 134 with stderr:

swift: /home/buildnode/jenkins/workspace/oss-swift-package-linux-ubuntu-16_04/swift/lib/SIL/SILFunctionBuilder.cpp:112: swift::SILFunction *swift::SILFunctionBuilder::getOrCreateFunction(swift::SILLocation, swift::SILDeclRef, swift::ForDefinition_t, swift::ProfileCounter): Assertion `fn->getLoweredFunctionType() == constantType' failed. Stack dump: 0. Program arguments: /usr/bin/swift -frontend -interpret - -disable-objc-interop -module-name main 1. Swift version 5.0-dev (LLVM 082dec2e22, Swift f5ba89d372) 2. While emitting SIL for 'f()' (at <stdin>:6:1) /usr/bin/swift[0x48f7534] /usr/bin/swift[0x48f5150] /usr/bin/swift[0x48f7958] /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7ff7202b0390] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0x38)[0x7ff71e9ef428] /lib/x86_64-linux-gnu/libc.so.6(abort+0x16a)[0x7ff71e9f102a] /lib/x86_64-linux-gnu/libc.so.6(+0x2dbd7)[0x7ff71e9e7bd7] /lib/x86_64-linux-gnu/libc.so.6(+0x2dc82)[0x7ff71e9e7c82] /usr/bin/swift[0xdf2d10] /usr/bin/swift[0x893a8c] /usr/bin/swift[0x89433d] /usr/bin/swift[0x89a2ec] /usr/bin/swift[0x89b334] /usr/bin/swift[0x89b93b] /usr/bin/swift[0x508302] /usr/bin/swift[0x504b9f] /usr/bin/swift[0x4a002d] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0)[0x7ff71e9da830] /usr/bin/swift[0x49fb89]

あれ〜　このオーバーロードsemaでエラーになるテストが既にマージされてるんだけどな。

これ？ https://github.com/apple/swift/pull/24166

Sema: don't consider opaque types distinct for overloading purpose...

This is necessary because: func foo() -> some P func foo() -> some P theoretically defines two distinct return types, but there'd be no way to disambiguate them. Disallow ove...

なんか微妙に違うな。

はい

6:14 AM

テストケースのここ

func redeclaration() -> some P { return 0 } // expected-note{{previously declared}} func redeclaration() -> some P { return 0 } // expected-error{{redeclaration}} func redeclaration() -> some Q { return 0 }

(edited)

6:15 AM

some Pとsome Qが並んでるので（エラーにはなってないみたいだけど）少なくともコンパイラクラッシュはしないはず

ふむ @swift-5.1.5 -frontend -typecheck -verify

protocol P1 {} protocol P2 {} extension Int : P1 {} extension Int : P2 {} func f() -> some P1 { return Int(0) } func f() -> some P2 { return Int(0) }

no output

あ、そうか、テストコードはIRGenまでやってないのか。

@swift-5.1.5

protocol P1 {} protocol P2 {} extension Int : P1 {} extension Int : P2 {} func f() -> some P1 { return Int(0) } func f() -> some P2 { return Int(0) } func r<T: P1>(_ a: T) { print(a) } r(f())

(edited)

exit status: 134 with stderr:

swift: /home/buildnode/jenkins/workspace/oss-swift-5.1-package-linux-ubuntu-16_04/swift/lib/SIL/SILFunctionBuilder.cpp:108: swift::SILFunction *swift::SILFunctionBuilder::getOrCreateFunction(swift::SILLocation, swift::SILDeclRef, swift::ForDefinition_t, swift::ProfileCounter): Assertion `fn->getLoweredFunctionType() == constantType' failed. Stack dump: 0. Program arguments: /usr/bin/swift -frontend -interpret - -disable-objc-interop -module-name main 1. While emitting SIL for 'f()' (at <stdin>:6:1) /usr/bin/swift[0x48e9374] /usr/bin/swift[0x48e6f90] /usr/bin/swift[0x48e9798] /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7f0ffb06b390] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0x38)[0x7f0ff97aa428] /lib/x86_64-linux-gnu/libc.so.6(abort+0x16a)[0x7f0ff97ac02a] /lib/x86_64-linux-gnu/libc.so.6(+0x2dbd7)[0x7f0ff97a2bd7] /lib/x86_64-linux-gnu/libc.so.6(+0x2dc82)[0x7f0ff97a2c82] /usr/bin/swift[0xdda2b0] /usr/bin/swift[0x89124c] /usr/bin/swift[0x891afd] /usr/bin/swift[0x897d7c] /usr/bin/swift[0x898da4] /usr/bin/swift[0x8993ab] /usr/bin/swift[0x5081da] /usr/bin/swift[0x504a8f] /usr/bin/swift[0x4a000d] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0)[0x7f0ff9795830] /usr/bin/swift[0x49fb89]

型が解ってもクラッシュするのか。

10:24 AM

一瞬いけるんじゃないかと期待してしまった

mangling結果が同じになるんだよね

10:25 AM

それで後段のIRGenでぶっ壊れる

なるほど

前見たときはそうだった。

@swift-5.0.3 @swift-main

import Foundation let data = Data([1, 2, 3]) print(data.range(of: Data([1, 2, 3])) ?? []) print(data.firstRange(of: Data([1, 2, 3])) ?? [])

(edited)

0..<3 [] (edited)

@swift-5.0.3 @swift-main

import Foundation let data = Data([1, 2, 3, 2, 1]) print(data.range(of: Data([1]), options: .backwards) ?? []) print(data.lastRange(of: Data([1])) ?? [])

(edited)

4..<5 0..<1 (edited)

@swift-5.0.3 @swift-main

import Foundation let data = Data([1, 2, 3]) print(data.range(of: Data([1]), options: .backwards, in: data.startIndex..<data.endIndex) ?? []) print(data.lastRange(of: Data([1]), in: data.startIndex..<data.endIndex) ?? [])

(edited)

exit status: 4 with stderr:

Stack dump: 0. Program arguments: /usr/bin/swift -frontend -interpret - -disable-objc-interop -module-name main 1. Swift version 5.0-dev (LLVM 082dec2e22, Swift 87e1efd1a2) /usr/bin/swift[0x48fde14] /usr/bin/swift[0x48fba30] /usr/bin/swift[0x48fe238] /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7f02906e8390] /usr/lib/swift/linux/libFoundation.so($s10Foundation4DataV15_RepresentationOys5UInt8VSicig+0x1b3)[0x7f028930b133]

(edited)

exit status: 4 with stderr:

Stack dump: 0. Program arguments: /usr/bin/swift -frontend -interpret - -disable-objc-interop -I /Libraries/.build/x86_64-unknown-linux/debug -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOHTTPParser/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOSHA1/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOAtomics/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIODarwin/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOLinux/include -module-cache-path /Libraries/.build/x86_64-unknown-linux/debug/ModuleCache -D DEBUG -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOHTTPParser.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOSHA1.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOAtomics.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIODarwin.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOLinux.build/module.modulemap -module-name main -lLibraries /usr/bin/swift[0x4626bd4] /usr/bin/swift[0x46249a0] /usr/bin/swift[0x4626d82] /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7f14d1559390] /usr/lib/swift/linux/libFoundation.so($s10Foundation4DataV15_RepresentationOys5UInt8VSicig+0x1b3)[0x7f14c9cc7203]

(edited)

firstRange/lastRange 周りがバグい

なんだこれ。

2:30 AM

@swift-5.1.5

import Foundation let data = Data([1, 2, 3]) let tests = [Data([1]), Data([1, 2]), Data([1, 2, 3])] for test in tests { let range = data.firstRange(of: test) print("\(range)") }

Optional(Range(0..<1)) Optional(Range(0..<1)) nilstderr:

<stdin>:8:14: warning: string interpolation produces a debug description for an optional value; did you mean to make this explicit? print("\(range)") ^~~~~ <stdin>:8:14: note: use 'String(describing:)' to silence this warning print("\(range)") ^~~~~ String(describing: ) <stdin>:8:14: note: provide a default value to avoid this warning print("\(range)") ^~~~~ ?? <#default value#>

@swift-5.1.5

import Foundation let data = Data([1, 2, 3]) let tests = [Data([1]), Data([1, 2]), Data([1, 2, 3])] for test in tests { let range = (data as NSData).firstRange(of: test) print("\(range)") }

(edited)

Optional(Range(0..<1)) Optional(Range(0..<2)) Optional(Range(0..<3))stderr:

<stdin>:8:14: warning: string interpolation produces a debug description for an optional value; did you mean to make this explicit? print("\(range)") ^~~~~ <stdin>:8:14: note: use 'String(describing:)' to silence this warning print("\(range)") ^~~~~ String(describing: ) <stdin>:8:14: note: provide a default value to avoid this warning print("\(range)") ^~~~~ ?? <#default value#>

(edited)

DataProtocolのデフォルト実装が正しい実装になっていない例えば↓など https://github.com/apple/swift-corelibs-foundation/blob/8043670b9d991d45ca72cfadc3806c68e9e16a05/Foundation/DataProtocol.swift#L82-L84

apple/swift-corelibs-foundation

The Foundation Project, providing core utilities, internationalization, and OS independence - apple/swift-corelibs-foundation

5

これはww

いつから last は 最後 だと錯覚していたｗｗｗ

残念だ。いったんレビューの指摘を受けて直っているのに、PRをout of dateにして別のPRで作り直されたときにfirstに先祖返りしてしまってる

https://github.com/apple/swift-corelibs-foundation/pull/1813#discussion_r243387179

Import the new inline Data implementation and DataProtocol from th...

This brings Data in sync with the overlay changes for the new inline revamp.

マージ前に指摘はされていたのか〜

DataProtocol.lastRange(of:) の件、apple/swiftの（つまりDarwin用の）swift-5.0-branchだけ正しい状態だったので、まずapple/swiftのmasterに修正のPR出してみました https://github.com/apple/swift/pull/25065 (edited)

Fix DataProtocol.lastRange(of:) (and cherry-pick Data.swift chan...

DataProtocol.lastRange(of:) is correct in swift-5.0-branch, but not in master and swift-5.1-branch. The changes are from #21292 (d7fcb87).

1

10:34 PM

これが通ればswift-5.1-branchと、foundationのmasterと5.0-branchにも修正出す流れで。

おお、ありがとうございます

@swift-main -frontend -repl import Foundation :print_decl URLSession import FoundationNetworking

@available(*, unavailable, message: "This type has moved to the FoundationNetworking module. Import that module to use it.") typealias URLSession = AnyObject

stderr:<REPL Input>:1:8: error: no such module 'FoundationNetworking' import FoundationNetworking ^

@swift-main @swift-5.1.5 @swift-5.0.3 @swift-4.2.4

indirect enum A { case case1 case case2(A, B) case case3(A, A, B) } indirect enum B { case case4(B) case case5 case case6 } func foo(_ a: A) { switch a { case .case2: break } }

exit status: 1 with stderr:

<stdin>:13:5: error: switch must be exhaustive switch a { ^ <stdin>:13:5: note: add missing case: '.case1' switch a { ^ <stdin>:13:5: note: add missing case: '.case3(_, _, _)' switch a { ^

no output

exit status: 1 with stderr:

<stdin>:13:5: error: switch must be exhaustive switch a { ^ <stdin>:13:5: note: add missing case: '.case1' switch a { ^ <stdin>:13:5: note: add missing case: '.case3(_, _, _)' switch a { ^

exhaustiveのチェックを壊してしまった

2:00 PM

5.0は壊れてるけど5.0.1では治ってるのか (edited)

@swift-main @swift-5.1.5 @swift-5.0.3

import Foundation public protocol NMBComparable { func NMB_compare(_ otherObject: NMBComparable!) -> ComparisonResult } extension NSNumber: NMBComparable { public func NMB_compare(_ otherObject: NMBComparable!) -> ComparisonResult { return compare(otherObject as! NSNumber) } } func take<T: Comparable>(_ a: T, _ b: T) {} func take<T: NMBComparable>(_ a: T, _ b: T) {} take(1, 2) take(NSNumber(value: 1), NSNumber(value: 2)) take(1, NSNumber(value: 2)) take(NSNumber(value: 1), 2)

(edited)

exit status: 1 with stderr:

<stdin>:17:1: error: ambiguous use of 'take' take(NSNumber(value: 1), NSNumber(value: 2)) ^ <stdin>:13:6: note: found this candidate func take<T: Comparable>(_ a: T, _ b: T) {} ^ <stdin>:14:6: note: found this candidate func take<T: NMBComparable>(_ a: T, _ b: T) {} ^ <stdin>:18:1: error: ambiguous use of 'take' take(1, NSNumber(value: 2)) ^ <stdin>:13:6: note: found this candidate func take<T: Comparable>(_ a: T, _ b: T) {} ^ <stdin>:14:6: note: found this candidate func take<T: NMBComparable>(_ a: T, _ b: T) {} ^ <stdin>:19:1: error: ambiguous use of 'take' take(NSNumber(value: 1), 2) ^ <stdin>:13:6: note: found this candidate func take<T: Comparable>(_ a: T, _ b: T) {} ^ <stdin>:14:6: note: found this candidate func take<T: NMBComparable>(_ a: T, _ b: T) {} ^

(edited)

exit status: 1 with stderr:

<stdin>:17:1: error: ambiguous use of 'take' take(NSNumber(value: 1), NSNumber(value: 2)) ^ <stdin>:13:6: note: found this candidate func take<T: Comparable>(_ a: T, _ b: T) {} ^ <stdin>:14:6: note: found this candidate func take<T: NMBComparable>(_ a: T, _ b: T) {} ^ <stdin>:18:1: error: ambiguous use of 'take' take(1, NSNumber(value: 2)) ^ <stdin>:13:6: note: found this candidate func take<T: Comparable>(_ a: T, _ b: T) {} ^ <stdin>:14:6: note: found this candidate func take<T: NMBComparable>(_ a: T, _ b: T) {} ^ <stdin>:19:1: error: ambiguous use of 'take' take(NSNumber(value: 1), 2) ^ <stdin>:13:6: note: found this candidate func take<T: Comparable>(_ a: T, _ b: T) {} ^ <stdin>:14:6: note: found this candidate func take<T: NMBComparable>(_ a: T, _ b: T) {} ^

(edited)

no output (edited)

@swift-main @swift-5.1.5 @swift-5.0.3 import Foundation func take<T: Comparable>(_ a: T, _ b: T) {} take(NSNumber(value: 1), NSNumber(value: 2))

no output

exit status: 1 with stderr:

<stdin>:3:6: error: argument type 'NSNumber' does not conform to expected type 'Comparable' take(NSNumber(value: 1), NSNumber(value: 2)) ^

no output

master, Swift 5.1で、なぜかLinuxでNSNumberがComparableとして認識されている？

3:16 PM

DarwinでのNSNumber

3:20 PM

https://github.com/apple/swift-corelibs-foundation/pull/2234 これが原因かー

Parity: NSSortDescriptor & _CFSwiftArrayReplaceValues by millenomi...

Implement the parts that can be implemented and annotate the rest with diagnostics. Add a partially source-compatible version of init(keyPath:ascending:) that works with Comparable values. A li...

3:21 PM

https://github.com/apple/swift-corelibs-foundation/pull/2234/files#diff-97da57b13a2883140d80304a7396a448R96

Parity: NSSortDescriptor & _CFSwiftArrayReplaceValues by millenomi...

Implement the parts that can be implemented and annotate the rest with diagnostics. Add a partially source-compatible version of init(keyPath:ascending:) that works with Comparable values. A li...

@swift-main

@ _propertyWrapper enum Lazy<Value> { case uninitialized(() -> Value) case initialized(Value) init(initialValue: @autoclosure @escaping () -> Value) { self = .uninitialized(initialValue) } var value: Value { mutating get { switch self { case .uninitialized(let initializer): let value = initializer() self = .initialized(value) return value case .initialized(let value): return value } } set { self = .initialized(newValue) } } } @Lazy var foo = 1738

no output

@swift-5.1.5 -frontend -c -enable-experimental-static-assert

func isOne(_ x: Int) -> Bool { return x == 1 } func test_assertionSuccess() { #assert(isOne(1)) #assert(isOne(1), "1 is not 1") } func test_assertionFailure() { #assert(isOne(2)) // expected-error{{assertion failed}} #assert(isOne(2), "2 is not 1") // expected-error{{2 is not 1}} }

exit status: 1 with stderr:

<stdin>:11:3: error: assertion failed #assert(isOne(2)) // expected-error{{assertion failed}} ^ <stdin>:12:3: error: 2 is not 1 #assert(isOne(2), "2 is not 1") // expected-error{{2 is not 1}} ^

便利だ

お、マージされたか！

4:26 AM

これパッチのころから追いかけていて、次の勉強会で紹介しようと思ってた

Constant Evaluatorで検索するとたくさんPR出てきます https://github.com/apple/swift/pulls?utf8=%E2%9C%93&q=is%3Apr+constant+evaluator

apple/swift

The Swift Programming Language. Contribute to apple/swift development by creating an account on GitHub.

10:48 AM

これってSILの最適化パスの一つとして実行されてる？という理解でよいのかな

そうです、SILのパスになってる

1

@swift-5.1.5 import FoundationNetworking

no output

@swift-5.1.5 func f(g: () -> Int) -> String { "\(g())" } print(f { 42 })

42

@tarunon

いけるのか

11:09 AM

引数のとこが自由度高すぎるように見えるので

11:09 AM

例えば環境から値注入するとか出来ちゃうよなーと思った次第です

11:09 AM

注入してる側でコンパイルエラーするのかな

そうそう、できちゃうのでgも @compilerEvaluable にしなきゃいけなくて、そうすると依存性切り離して使いたい関数を @compilerEvaluable にするような運用はできないってことになるので、普段使いできそうにないなーと

今の所暗黙的に計算してるのかなと思いますが…フーム

https://discordapp.com/channels/291054398077927425/430242233468452865/586767736512708618

@takasek printじゃなくて#assertですね

あーいや、もとからできない例として書いたつもりだった

11:29 AM

@swift-5.1.5 #assert(1 < 2)

exit status: 1 with stderr:<stdin>:1:1: error: #assert is an experimental feature that is currently disabled #assert(1 < 2) ^

@swift-5.1.5 -frontend -c -enable-experimental-static-assert #assert(1 < 2)

exit status: 134 with stderr:

swift: /home/buildnode/jenkins/workspace/oss-swift-5.1-package-linux-ubuntu-16_04/llvm/lib/Support/raw_ostream.cpp:735: uint64_t llvm::raw_fd_ostream::seek(uint64_t): Assertion `SupportsSeeking && "Stream does not support seeking!"' failed. Stack dump: 0. Program arguments: swift -frontend -c -enable-experimental-static-assert - swift[0x4938c34] swift[0x4936850] swift[0x4939058] /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7f7c86339390] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0x38)[0x7f7c84a78428] /lib/x86_64-linux-gnu/libc.so.6(abort+0x16a)[0x7f7c84a7a02a] /lib/x86_64-linux-gnu/libc.so.6(+0x2dbd7)[0x7f7c84a70bd7] /lib/x86_64-linux-gnu/libc.so.6(+0x2dc82)[0x7f7c84a70c82] swift[0x49196b0] swift[0x4919701] swift[0x4657dda] swift[0x4651a63] swift[0x45ed347] swift[0x1eaf048] swift[0x47b2e45] swift[0x47b3423] swift[0x5847c1] swift[0x50a4e4] swift[0x5058cf] swift[0x4a022d] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0)[0x7f7c84a63830] swift[0x49fda9]

おや

なぜころたし

@swift-5.0.3

class Animal { func foo() -> Int? { return nil } } class Cat: Animal { override func foo() -> Int { return 42 } } let animal: Animal = Cat() print(animal.foo()!)

42

@swift-5.1.5

class Animal { func foo() -> Int? { return nil } } class Cat: Animal { override func foo() -> Int { return 42 } override func foo() -> Int? { return nil } }

exit status: 1 with stderr:

<stdin>:9:19: error: 'foo()' has already been overridden override func foo() -> Int? { return nil } ^ <stdin>:8:19: note: 'foo()' previously overridden here override func foo() -> Int { return 42 } ^

ちゃんとしてる

Swift 5.1 で OpenCombine https://github.com/broadwaylamb/OpenCombine をインポート出来るようにしました。 @swift-5.1.5

import OpenCombine let publisher = Just(28) _ = publisher .map { number in return "Antoine's age is \(number)" } .sink { (value) in print(value) }

(edited)

broadwaylamb/OpenCombine

Open-source implementation of Apple's Combine framework for processing values over time. - broadwaylamb/OpenCombine

Antoine's age is 28 (edited)

OpenCombineなるほど

1:17 AM

そういうのがあればCombineによせても、Linux対応問題は一応解決するな、挙動同じなら・・・

完全に挙動同じライブラリがある場合Combineのメリットって何になるんでしょう。アプリサイズが小さくなるくらいしか思いつかないですが。

iOSでもこっちを使うってこと？

iOS開発の場合はそうですね。コマンドラインツールとかubuntuでも動くのの場合のことを考えてました。

FoundationとかUIkitの関連APIを全部2重で生やさないといけないけど

1:34 AM

実装されているならApple版は要らないね

1:35 AM

どっちかというと、すでにapple版があるのにOSS版の実装が完全に整うかどうかって点で

1:35 AM

実現しない気がする。

1:36 AM

てか挙動同じならなおさらどっちでもいいので作る必要がない

1:36 AM

あ、でもソース付きデバッグできるとかあるかも。

1:36 AM

ストリーム系は特にややこいし。

やはりapple系ではCombineでしょうね。それになれた開発者がlinux開発に行くときに使うかも？ってくらいになりそうでしょうか。

うん。

1:38 AM

あ〜

1:38 AM

SSSで非同期処理の基盤で使うってのはあるかなあ？

1:38 AM

Promiseの代わり。

1:38 AM

Rx.Single型相当があるんだったらありな気がする

既存フレームワークはswift-nioベースで割り込む余地無さそうですけどね。 (edited)

nioはネットワークレイヤーであって非同期基盤ではなくない？Promiseも提供してんだっけ。

vaporのはswift-nio上で実装されてたような？

1:41 AM

(あんまり自信ないので見てみます)

1:43 AM

https://github.com/apple/swift-nio/blob/master/Sources/NIO/EventLoopFuture.swift このへんか

apple/swift-nio

Event-driven network application framework for high performance protocol servers & clients, non-blocking. - apple/swift-nio

VaporのFuture, Promiseは swift-nio 版のtypealias + extension https://github.com/vapor/core/blob/master/Sources/Async/Async%2BNIO.swift#L4-L8 swift-nioにはストリームぽいのは無かったと思う。 (edited)

vapor/core

Utility package containing tools for byte manipulation, Codable, OS APIs, and debugging. - vapor/core

肝心のそっちを貼るのを忘れてました

3:56 AM

typealiasのせいで補完が毎回EventLoopFutureになってちょっと長いのが気にならないでもない

ストリームの方がスコープとしては広いので置き換えりゃいいってもんでもないので悩ましいですね

@swift-main -Xfrontend -emit-sil -O

protocol Observable { associatedtype Element func subscribe(_ f: @escaping (Element) -> Void) } struct Just<T>: Observable { typealias Element = T let value: T func subscribe(_ f: @escaping (T) -> Void) { f(value) } } struct Map<Source: Observable, U>: Observable { typealias Element = U let source: Source let transformer: (Source.Element) -> U func subscribe(_ f: @escaping (U) -> Void) { source.subscribe { [transformer] element in f(transformer(element)) } } } extension Observable { func map<U>(_ f: @escaping (Element) -> U) -> Map<Self, U> { return Map(source: self, transformer: f) } } Just(value: 122) .map { $0.description } .map { $0.count } .subscribe { element in print(element.description) }

sil_stage canonical import Builtin import Swift import SwiftShims protocol Observable { associatedtype Element func subscribe(_ f: @escaping (Self.Element) -> ()) } struct Just<T> : Observable { typealias Element = T @_hasStorage let value: T { get } func subscribe(_ f: @escaping (T) -> ()) init(value: T) } struct Map<Source, U> : Observable where Source : Observable { typealias Element = U @_hasStorage let source: Source { get } @_hasStorage let transformer: (Source.Element) -> U { get } func subscribe(_ f: @escaping (U) -> ()) init(source: Source, transformer: @escaping (Source.Element) -> U) } extension Observable { func map<U>(_ f: @escaping (Self.Element) -> U) -> Map<Self, U> } // _swiftEmptyArrayStorage sil_global @_swiftEmptyArrayStorage : $_SwiftEmptyArrayStorage // main sil @main : $@convention(c) (Int32, UnsafeMutablePointer<Optional<UnsafeMutablePointer<Int8>>>) -> Int32 { bb0(%0 : $Int32, %1 : $UnsafeMutablePointer<Optional<UnsafeMutablePointer<Int8>>>): %2 = integer_literal $Builtin.Int64, 122 // user: %3 %3 = struct $Int (%2 : $Builtin.Int64) // users: %6, %4 debug_value %3 : $Int, let, name "$0", argno 1 // id: %4 %5 = alloc_stack $Int // users: %9, %8, %6 store %3 to %5 : $*Int // id: %6 // function_ref BinaryInteger.description.getter %7 = function_ref @$sSzsE11descriptionSSvg : $@convention(method) <τ_0_0 where τ_0_0 : BinaryInteger> (@in_guaranteed τ_0_0) -> @owned String // users: %32, %8 %8 = apply %7<Int>(%5) : $@convention(method) <τ_0_0 where τ_0_0 : BinaryInteger> (@in_guaranteed τ_0_0) -> @owned String // users: %51, %10, %11, %12, %14 dealloc_stack %5 : $*Int // id: %9 debug_value %8 : $String, let, name "element", argno 1 // id: %10 debug_value %8 : $String, let, name "element", argno 1 // id: %11 debug_value %8 : $String, let, name "$0", argno 1 // id: %12 // function_ref String.count

stdout.txt

https://file.io/gJ7TQy

このくらい単純だと全部スペシャライズとインライン化で消えるし、Combineもそうなってほしい

8:50 AM

https://twitter.com/omochimetaru/status/1149229711198838784?s=21

おも🐈ちメ🐍タル (@omochimetaru)

うーん、Combine実験してみたけど特にspecializeされなくてあんまり嬉しみが無い・・・

@inlinableにした時点で実装が丸見えですからね。AppleがCombineをOSSにするつもりがなければ無理そう。

Combineに関しては隠す必要あるのかなぁ、という感じですけど。

オープンソースでよいやんね

OSに同梱されてるフレームワークに関してはクローズドにしておく、みたいなポリシーなのかな (edited)

インライン化するとライブラリのアップデートができないという問題は、まあ、ある

うーん、まあそれはそう…

標準ライブラリが specialize できるのはなんでだっけ？

あれは中身見えてますね

OSに同梱されてるフレームワークに関してはクローズドにしておく、みたいなポリシーなのかな

一応 Foundation はオープンだから、 Combine も同じで良さそうな気も。

10:13 AM

あれは中身見えてますね

中身が見えるかじゃなくて、ライブラリのアップデートができないという問題について。 (edited)

インライン化されたアプリは実装改善の恩恵は受けられないと思います

10:14 AM

そういう余地が無い自明な処理しかinlinableつけてない気がする

10:15 AM

transparentもありますね

標準ライブラリレベルでそれやってるなら Combine でも良さそうだと思ったけど、まだ安定性が違いすぎるのか。

Combineの中身に関しては単純なmapでもストリームオブジェクトの構築とかが絡むので

10:16 AM

実装が自明じゃなさそうなので渋る気持ちはわかる

OS標準フレームワークを立ち上げ時点からOSSにするのは難しそう。

今は無理でも Combine はそのうちオープンソース化はありそう。

1

この記事は、RxSwift, ReactiveSwiftよりCombineの方が速いと書いてる。 https://medium.com/flawless-app-stories/problem-solving-with-combine-swift-4751885fda77

Problem Solving with Combine Swift - Flawless iOS - Medium

Combine has many benefits: simple asynchronous code, simplified multithreading, compassable components. Let’s learn Combine essentials and see what practical problems we can solve with it.

Combineにインライン化して消える最適化がなくても、RxSwiftは内部的にはサブクラス化していてvtableの参照が沢山あるので、納得感のある結果に見えます。 (edited)

@swift-5.0.3 import Foundation print(ProcessInfo.processInfo.environment["SWIFT_VERSION"]!)

5.0.2-RELEASE

@swift-5.1.5 @available(macCatalyst 13.0, *) func f() {}

stderr:<stdin>:1:28: warning: unrecognized platform name 'macCatalyst' @available(macCatalyst 13.0, *) ^

認識するのはまだXcode 11 beta 4だけか。

@swift-5.1.5 import Foundation print(FileManager.default.fileExists(atPath: "/usr/bin/sourcekit-lsp"))

true

sourcekit-lspがtoolchainに含まれる様になったのか。

とっくに含まれてると思いこんでた。

@swift-main

struct Adder { var base: Int func callAsFunction(_ x: Int) -> Int { return x + base } } var adder = Adder(base: 3) print(adder(10)) // 13

13

https://github.com/apple/swift-evolution/blob/master/proposals/0253-callable.md こんな提案が出てたんですね

apple/swift-evolution

This maintains proposals for changes and user-visible enhancements to the Swift Programming Language. - apple/swift-evolution

3:25 AM

call-syntax can also be useful for other values ... , parsers ... というところ割と同意。

はい。今日masterにマージされた報告が出た。 https://forums.swift.org/t/accepted-with-modification-se-0253-callable-values-of-user-defined-nominal-types/24605/175?u=omochimetaru

[Accepted with Modification] SE-0253 - Callable values of user-def...

func callAsFunction has been merged and is available in latest development snapsnots from swift.org/download. I just tested swift-DEVELOPMENT-SNAPSHOT-2019-08-27-a: struct Adder { var base: Int func callAsFunction(_ x: Int) -> Int { return x + base } } var adder =...

3:29 AM

なんちゃらParserとかLoaderとかConverterとか〜〜er系のクラスって、補助的なパラメータをカスタムするためのプロパティと、対応するparse(), load(), convert() とかを呼ぶだけのインターフェースになることがわりとあるので

まあしかしだいぶ単純な名前を予約したな。

そういうケースでこれ使うとよさそうっすね

3:30 AM

はい、そのへんの名前はめっちゃ議論がぐるぐるして

確かもとはcallだったはずｗ

最初はcallに落ち着きそうだったんだけどcallFunctionになってcallAsFunctionになっていった

3:30 AM

メソッド名無しとか

3:31 AM

funcの代わりに新しい予約語としてcallで定義するとかの案もありました。 (edited)

まあでもコールサイトの問題だから影響はないのか。

3:31 AM

func call()でも

使う側からするとどうせ見えないっすね

3:32 AM

でも僕はfunc callが良かったな・・・ (edited)

まあこのマニアックな言語仕様を知らなかったらわからんというのはある。 func call() だと

@callableとかもあったな。

Codableとかはなんとなく知識の延長でわかる気がするけど func callAsFuncion() は閃きが必要じゃないか。

3:34 AM

@callableはいいんじゃない。

特に違和感なくcallAsFunction使ってましたけど仕様知らなかったら完全に意味不明ですね……

特殊な事が起こる感があってググりやすそうですよね

3:35 AM

アトリビュート増やしまくるのやめてくれ〜みたいな反論もあった

3:36 AM

結局コアチームの言うcallがダメな最大の理由は、それまでにたまたま使われたcallに新しい意味が衝突するのは良くないって事だったと記憶 (edited)

3:37 AM

つまりこの仕様が出るのがSwift2.0とかだったらcallになった可能性もあるって事で

3:37 AM

保守的になったなあ、と思った。

callAsFunctionでも一緒だけど、その辺は柔軟だなあ

そうですね、確率的に多いだろう、って話ですね (edited)

まあ本質的に一緒だけどcallよりだいぶマシというのはわかります。

それでcallFunctionが出て、それ英語的に命名がおかしい、ってなってcallAsFunctionになっていった。

@swift-main

struct Adder { var base: Int func callAsFunction(_ x: Int) -> Int { return x + base } } var adder = Adder(base: 3) [1].map(adder).forEach { print($0) }

exit status: 1 with stderr:<stdin>:10:5: error: cannot invoke 'map' with an argument list of type '(Adder)' [1].map(adder).forEach { print($0) } ^

あ、はい

6:44 AM

@swift-main

struct Adder { var base: Int func callAsFunction(_ x: Int) -> Int { return x + base } } var adder = Adder(base: 3) [1].map(adder.callAsFunction).forEach { print($0) }

4

.initと同じ扱い的な

@swift-5.0.3 -version

Swift version 5.0.3 (swift-5.0.3-RELEASE) Target: x86_64-unknown-linux-gnu

@swift-5.0.3 --options="-I /vendor/SwiftyMath/.build/release/ -I /usr/lib/swift/clang/include/ -I /vendor/swift-package-libbsd/ -L /vendor/SwiftyMath/.build/release/ -ldSwiftyMath" import SwiftyMath let a = RationalNumber(2, 3) print(a)

exit status: 1 with stderr:<unknown>:0: error: unknown argument: '--options="-I'

どうやるんだったかw

1:50 PM

@swift-5.0.3 import SwiftyMath let a = RationalNumber(2, 3) print(a)

exit status: 1 with stderr:<stdin>:1:8: error: no such module 'SwiftyMath' import SwiftyMath ^

@swiftbot --options="-I /vendor/SwiftyMath/.build/release/ -I /usr/lib/swift/clang/include/ -I /vendor/swift-package-libbsd/ -L /vendor/SwiftyMath/.build/release/ -ldSwiftyMath" import SwiftyMath let a = RationalNumber(2, 3) print(a) (edited)

1

(edited)

taketo1024

import SwiftyMath let a = RationalNumber(2, 3) print(a)

Version:

swift-4.2.1-RELEASE

Output:

Error:

/usercode/main.swift:1:8: error: no such module 'SwiftyMath' import SwiftyMath ^

@swiftbot --options="-I /vendor/SwiftyMath/.build/release/ -I /usr/lib/swift/clang/include/ -I /vendor/swift-package-libbsd/ -L /vendor/SwiftyMath/.build/release/ -ldSwiftyMath" import SwiftyMath let a = RationalNumber(2, 3) print(a)

1

taketo1024

import SwiftyMath let a = RationalNumber(2, 3) print(a)

Version:

swift-4.2.1-RELEASE

Output:

Error:

/usercode/main.swift:1:8: error: no such module 'SwiftyMath' import SwiftyMath ^

ビルドが通らなくなったりしてたから外してあるのかな

@swiftbot -version

2:03 PM

うーむw

最近、ここ見てませんでした、ごめんなさい。

4:50 AM

ビルドが通らなくなったりしてたから外してあるのかな

外してあります。4.2はオプション無しでインポート可能です。 @swift-4.2.4 import SwiftyMath

no output

了解です，ありがとうございます！

11:56 AM

こちらこそビルド通らないまま放置してしまってすみません

11:56 AM

@swift-4.2.4

import SwiftyMath typealias AlgebraicExtension<F, p: IrrPolynomialTP> = PolynomialQuotientRing<p> where p.CoeffRing == F typealias Q = RationalNumber typealias Qx = xPolynomial<Q> let x = Qx.indeterminate struct p1: IrrPolynomialTP { static let value = Qx(coeffs: -2, 0, 1) } typealias A = AlgebraicExtension<Q, p1> // A = Q[x]/p1 let α = A(x) print(α) print(α * α) print(α * α == 2) struct p2: IrrPolynomialTP { static let value = xPolynomial<Q>(coeffs: 1, 0, 1) } typealias B = AlgebraicExtension<Q, p2> // B = Q[x]/p2 let i = B(x) print(i) print(i * i) print(i * i == -1)

(edited)

exit status: 1 with stderr:

<stdin>:4:7: error: use of undeclared type 'PolynomialQuotientRing' = PolynomialQuotientRing<p> where p.CoeffRing == F ^~~~~~~~~~~~~~~~~~~~~~ <stdin>:7:16: error: use of undeclared type 'xPolynomial' typealias Qx = xPolynomial<Q> ^~~~~~~~~~~ <stdin>:11:8: error: type 'p1' does not conform to protocol 'PolynomialTP' struct p1: IrrPolynomialTP { ^ SwiftyMath.PolynomialTP:2:20: note: protocol requires nested type 'CoeffRing'; do you want to add it? associatedtype CoeffRing : Ring ^ SwiftyMath.PolynomialTP:3:20: note: protocol requires nested type 'x'; do you want to add it? associatedtype x : Indeterminate ^ <stdin>:24:24: error: use of unresolved identifier 'xPolynomial' static let value = xPolynomial<Q>(coeffs: 1, 0, 1) ^~~~~~~~~~~ SwiftyMath.MPolynomial:1:15: note: did you mean 'MPolynomial'? public struct MPolynomial<R> : Ring, Module where R : Ring { ^ SwiftyMath._Polynomial:1:15: note: did you mean '_Polynomial'? public struct _Polynomial<T, R, x> : Ring, Module where T : PolynomialType, R : Ring, x : Indeterminate { ^ SwiftyMath.Polynomial:1:18: note: did you mean 'Polynomial'? public typealias Polynomial<R, x> = SwiftyMath._Polynomial<SwiftyMath.NormalPolynomialType, R, x> ^ <stdin>:23:8: error: type 'p2' does not conform to protocol 'PolynomialTP' struct p2: IrrPolynomialTP { ^ SwiftyMath.PolynomialTP:2:20: note: protocol requires nested type 'CoeffRing'; do you want to add it? associatedtype CoeffRing : Ring ^ SwiftyMath.PolynomialTP:3:20: note: protocol requires nested type 'x'; do you want to add it? associatedtype x : Indeterminate ^

あぁ，やはりw

11:57 AM

Swift 5.1 正式リリースのタイミングで master も更新しておくので，そのときにでもまた組み込んで頂けると嬉しいです

1

どのバージョンのSwiftで動くのかがCIやドキュメントから判ると、対応がしやすいと思います。あと、バージョニングのルールもSemVerに従ってもらえてると、リリースwatchで気づきやすくなります。

これを機に CI 導入するのはありな気がしてきました．

@swift-5.1.5 -version

Swift version 5.1 (swift-5.1-RELEASE) Target: x86_64-unknown-linux-gnu

@swift-5.1.5

@dynamicMemberLookup struct Foo<Content> { let content: Content subscript<T>(dynamicMember keyPath: KeyPath<Content, T>) -> T { return content[keyPath: keyPath] } } print(Foo<Int>(content: 100).description)

100

@swift-5.1.5

struct Foo<Content> { let content: Content } @dynamicMemberLookup extension Foo { subscript<T>(dynamicMember keyPath: KeyPath<Content, T>) -> T { return content[keyPath: keyPath] } } print(Foo<Int>(content: 100).description)

exit status: 1 with stderr:

<stdin>:5:1: error: '@dynamicMemberLookup' attribute cannot be applied to this declaration @dynamicMemberLookup ^~~~~~~~~~~~~~~~~~~~ <stdin>:12:30: error: value of type 'Foo<Int>' has no member 'description' print(Foo<Int>(content: 100).description) ~~~~~~~~~~~~~~~~~~~~~~ ^~~~~~~~~~~

@swift-4.2.4 @swift-5.0.3

class Parent { var id: Int init(id: Int) { self.id = id } } protocol Abstract: Parent { func printID() } class Child: Parent, Abstract { override init(id: Int) { super.init(id: id) } func printID() { print("Child: \(id)") } } let c = Child(id: 0) c.printID()

Child: 0

exit status: 1 with stderr:<stdin>:9:10: error: non-class type 'Abstract' cannot inherit from class 'Parent' protocol Abstract: Parent { ^ ~~~~~~

Swift4.2だと特定クラス条件のプロトコル作れないんですっけ？ vaporが公式で用意してるaptリポジトリのバージョンが4.2なので困った (edited)

@swift-4.2.4 @swift-5.0.3

class Parent { var id: Int init(id: Int) { self.id = id } } protocol Abstract where Self: Parent { var name: String { get } } extension Abstract { func printProfile() { print("\(id) \(name)") } } class Child: Parent, Abstract { var name: String init(id: Int, name: String) { self.name = name super.init(id: id) } } let c = Child(id: 42, name: "hoge") c.printProfile()

42 hoge

Self: Parentなら使えると教えてもらいました。

@swift-4.2.4

import Foundation let locale = Locale(identifier: "ja") let data = try JSONEncoder().encode(locale) let decoded = try JSONDecoder().decode(Locale.self, from: data) print(locale == decoded) print(locale.hashValue == decoded.hashValue)

true false

Dictionaryで引っかからないと思ったらバグかこれ(5以降は治っている)

やばすぎw

darwinとswift-corelibs-foundationで非互換になってたのか。 (edited)

非互換もまずいけど、そもそも ==なのに hashValueが同一にならないのはHashableとして誤りですね

2:03 AM

辞書に入れてもバグるので使い物にならない

これ多分中にNSObjectが入ってたせいだと思うんですよね

https://bugs.swift.org/browse/SR-8448 ==だけ上書きしたせいとのこと。 (edited)

そりゃあかんな。

2:08 AM

常にセットで実装しないと。

これか。swift-3.0-RELEASEから壊れてたのね。 https://github.com/apple/swift-corelibs-foundation/commit/80e0f056716497f30525ae423ab56602595d5b25

Enable NSLocale keyed archiving unit tests (#596) · apple/swift-c...

Archive NSLocale identifier as NSString
- Override isEqual for NSLocale
- Uncomment NSLocale archiving test

@swift-5.1.5 -version

Swift version 5.1.1 (swift-5.1.1-RELEASE) Target: x86_64-unknown-linux-gnu

@swift-5.1.5

@propertyWrapper struct Foo<Value> { var wrappedValue: Value var projectedValue: Self { self } } protocol Namespace { typealias MyFoo = Foo } struct Test { @Foo var val = 0 } struct MyTest: Namespace { @MyFoo var val = 0 } let t1 = Test() print(t1.val, t1.$val) let t2 = MyTest() print(t2.val, t2.$val)

(edited)

exit status: 1 with stderr:

<stdin>:18:5: error: unknown attribute 'MyFoo' @MyFoo ^ <stdin>:26:18: error: value of type 'MyTest' has no member '$val' print(t2.val, t2.$val) ~~ ^~~~

(edited)

@swiftbot versions

2019-10-13-a 5.1 5.0.3 5.0.2 5.0.1 5.0 4.2.2 4.2.1 4.1.3 4.1.2 4.1.1 4.1 4.0.3 4.0.2 4.0 3.1.1 3.1 3.0.2 3.0.1

5.x と最新のスナップショットサポートした。

2

@swiftbot

let rows: [(id: Int, name1: String, name2: String)] = [ (0, "x", "y"), (1, "z", "w") ] let results1 = rows.flatMap { row in var entries = [(Int, String)]() entries.append((row.id, row.name1)) entries.append((row.id, row.name2)) return entries }

(edited)

1

(edited)

t.ae

let rows: [(id: Int, name1: String, name2: String)] = [ (0, "x", "y"), (1, "z", "w") ] let results1 = rows.flatMap { row in var entries = [(Int, String)]() entries.append((row.id, row.name1)) entries.append((row.id, row.name2)) return entries }

Version:

swift-4.2.1-RELEASE

Output:

Error:

/usercode/main.swift:10:12: error: cannot convert return expression of type '[(Int, String)]' to return type 'String?' return entries ^~~~~~~ /usercode/main.swift:6:21: warning: 'flatMap' is deprecated: Please use compactMap(_:) for the case where closure returns an optional value let results1 = rows.flatMap { row in ^ /usercode/main.swift:6:21: note: use 'compactMap(_:)' instead let results1 = rows.flatMap { row in ^~~~~~~ compactMap

5:04 AM

stderr-4.2.1.txt

1.06 KB

あれ、デフォルトが4.2のままか？

デフォ4.2.1みたいですね。

5:06 AM

(上コードは5.1でもコンパイルできないやつです。)

@swiftbot

let rows: [(id: Int, name1: String, name2: String)] = [ (0, "x", "y"), (1, "z", "w") ] let results1 = rows.flatMap { row in var entries = [(Int, String)]() entries.append((row.id, row.name1)) entries.append((row.id, row.name2)) return entries }

1

kishikawakatsumi

let rows: [(id: Int, name1: String, name2: String)] = [ (0, "x", "y"), (1, "z", "w") ] let results1 = rows.flatMap { row in var entries = [(Int, String)]() entries.append((row.id, row.name1)) entries.append((row.id, row.name2)) return entries }

Version:

swift-5.1-RELEASE

Output:

Error:

/usercode/main.swift:10:12: error: cannot convert return expression of type '[(Int, String)]' to return type 'String?' return entries ^~~~~~~ /usercode/main.swift:6:21: error: 'flatMap' has been renamed to 'compactMap(_:)': Please use compactMap(_:) for the case where closure returns an optional value let results1 = rows.flatMap { row in ^~~~~~~ compactMap Swift.Collection:3:17: note: 'flatMap' was obsoleted in Swift 5.0 public func flatMap(_ transform: (Self.Element) throws -> String?) rethrows -> [String] ^

エラーメッセージ変わったし、5.1デフォルトになった。

@swiftbot let rows = [10, 20] let results1 = rows.flatMap { row in var entries = [Int]() entries.append(row) return entries }

1

hironytic

let rows = [10, 20] let results1 = rows.flatMap { row in var entries = [Int]() entries.append(row) return entries }

Version:

swift-5.1-RELEASE

Output:

Error:

/usercode/main.swift:5:12: error: cannot convert return expression of type '[Int]' to return type 'String?' return entries ^~~~~~~ /usercode/main.swift:2:21: error: 'flatMap' has been renamed to 'compactMap(_:)': Please use compactMap(_:) for the case where closure returns an optional value let results1 = rows.flatMap { row in ^~~~~~~ compactMap Swift.Collection:3:17: note: 'flatMap' was obsoleted in Swift 5.0 public func flatMap(_ transform: (Self.Element) throws -> String?) rethrows -> [String] ^

訳がわからない

@swiftbot

let rows = [10, 20] let results1 = rows.flatMap { row -> [Int] in var entries = [Int]() entries.append(row) return entries }

1

tarunon

let rows = [10, 20] let results1 = rows.flatMap { row -> [Int] in var entries = [Int]() entries.append(row) return entries }

Version:

swift-5.1-RELEASE

Output:

Error:

型推論壊れてるみたいですねぇ

@swiftbot --version 2019-10-13-a let rows = [10, 20] let results1 = rows.flatMap { row in var entries = [Int]() entries.append(row) return entries }

1

kishikawakatsumi

let rows = [10, 20] let results1 = rows.flatMap { row in var entries = [Int]() entries.append(row) return entries }

Version:

swift-DEVELOPMENT-SNAPSHOT-2019-10-13-a

Output:

Error:

/usercode/main.swift:5:12: error: cannot convert return expression of type '[Int]' to return type 'String?' return entries ^~~~~~~ /usercode/main.swift:2:21: error: 'flatMap' has been renamed to 'compactMap(_:)': Please use compactMap(_:) for the case where closure returns an optional value let results1 = rows.flatMap { row in ^~~~~~~ compactMap Swift.Collection:3:17: note: 'flatMap' was obsoleted in Swift 5.0 public func flatMap(_ transform: (Self.Element) throws -> String?) rethrows -> [String] ^

Snapshotでも一緒やな

@swift-4.2.4 struct View<Value> { typealias Value = Value var value: Value } print(View<Int>.Value.self)

exit status: 1 with stderr:

<stdin>:2:23: error: type alias 'Value' references itself typealias Value = Value ^ <stdin>:2:15: note: type declared here typealias Value = Value ^

@swift-5.0.3 struct View<Value> { typealias Value = Value var value: Value } print(View<Int>.Value.self)

Int

@swiftbot

let a: [UInt8] = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15] let b = UnsafeRawPointer(a).load(fromByteOffset: 1, as: Int.self).littleEndian

1

hironytic

let a: [UInt8] = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15] let b = UnsafeRawPointer(a).load(fromByteOffset: 1, as: Int.self).littleEndian

Version:

swift-5.1-RELEASE

Output:

Error:

Fatal error: load from misaligned raw pointer Current stack trace: 0 libswiftCore.so 0x00007fc6a04293c0 swift_reportError + 50 1 libswiftCore.so 0x00007fc6a049a230 _swift_stdlib_reportFatalError + 69 2 libswiftCore.so 0x00007fc6a0395c07 <unavailable> + 3349511 3 libswiftCore.so 0x00007fc6a02453c0 UnsafeRawPointer.load<A>(fromByteOffset:as:) + 88 5 swift 0x000000000052826e <unavailable> + 1213038 6 swift 0x000000000052cb52 <unavailable> + 1231698 7 swift 0x000000000051cc2f <unavailable> + 1166383 8 swift 0x000000000050b468 <unavailable> + 1094760 9 swift 0x0000000000506de1 <unavailable> + 1076705 10 swift 0x00000000004a022d <unavailable> + 655917 ...

2:33 AM

stderr-5.1.txt

1.79 KB

オオオ（俺も今試してた

起こりますね https://twitter.com/omochimetaru/status/1189366800665825281

おも🐈ちメ🦡タル (@omochimetaru)

@hironytic @d_date それ僕も思ったんですけど現状macとLinuxでアライメント違反って実行時エラー起きるんですかね？僕は気にして書いてますけど・・・

2:35 AM

@swiftbot

let a: [UInt8] = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15] let b = UnsafeRawPointer(a).load(fromByteOffset: 8, as: Int.self).littleEndian

1

hironytic

let a: [UInt8] = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15] let b = UnsafeRawPointer(a).load(fromByteOffset: 8, as: Int.self).littleEndian

Version:

swift-5.1-RELEASE

Output:

Error:

アラインメントに合った8なら大丈夫。

@swift-5.1.5

import Foundation let array: [UInt8] = [ 0x10, 0x20, 0x30, 0x40, 0x11, 0x21, 0x31, 0x41, 0x99] let a = array.withUnsafeBufferPointer { (buf) -> Int in buf.baseAddress!.withMemoryRebound(to: Int.self, capacity: 1) { (ip) in ip.pointee } } print(String(format: "%016llx", a), a == Int(bitPattern: 0x4131211140302010)) let b = array.withUnsafeBufferPointer { (buf) -> Int in buf.baseAddress!.advanced(by: 1).withMemoryRebound(to: Int.self, capacity: 1) { (ip) in ip.pointee } } print(String(format: "%016llx", b), b == Int(bitPattern: 0x9941312111403020)) print(MemoryLayout<Int>.size)

4131211140302010 true 9941312111403020 true 8

あれ、もしかして、withMemoryReboundってアライメント治すの？

2:41 AM

@swift-5.1.5

import Foundation let array: [UInt8] = [ 0x10, 0x20, 0x30, 0x40, 0x11, 0x21, 0x31, 0x41, 0x99] func reboundToInt(pointer: UnsafePointer<UInt8>) -> Int { return pointer.withMemoryRebound(to: Int.self, capacity: 1) { (ip) in ip.pointee } } func assumeToInt(pointer: UnsafePointer<UInt8>) -> Int { return UnsafeRawPointer(pointer).assumingMemoryBound(to: Int.self).pointee } let a = array.withUnsafeBufferPointer { (buf) -> Int in reboundToInt(pointer: buf.baseAddress!) } print(String(format: "%016llx", a), a == Int(bitPattern: 0x4131211140302010)) let b = array.withUnsafeBufferPointer { (buf) -> Int in reboundToInt(pointer: buf.baseAddress!.advanced(by: 1)) } print(String(format: "%016llx", b), b == Int(bitPattern: 0x9941312111403020)) let c = array.withUnsafeBufferPointer { (buf) -> Int in assumeToInt(pointer: buf.baseAddress!) } print(String(format: "%016llx", c), c == Int(bitPattern: 0x4131211140302010)) let d = array.withUnsafeBufferPointer { (buf) -> Int in assumeToInt(pointer: buf.baseAddress!.advanced(by: 1)) } print(String(format: "%016llx", d), d == Int(bitPattern: 0x9941312111403020))

4131211140302010 true 9941312111403020 true 4131211140302010 true 9941312111403020 true

@swift-5.1.5

import Foundation let array: [UInt8] = [ 0x10, 0x20, 0x30, 0x40, 0x11, 0x21, 0x31, 0x41, 0x99] func reboundToInt(pointer: UnsafePointer<UInt8>) -> Int { return pointer.withMemoryRebound(to: Int.self, capacity: 1) { (ip) in ip.pointee } } func assumeToInt(pointer: UnsafePointer<UInt8>) -> Int { let intp = UnsafeRawPointer(pointer).assumingMemoryBound(to: Int.self) print("[assume] p: \(Int(bitPattern: pointer))") print("[assume] intp: \(Int(bitPattern: intp))") return intp.pointee } let a = array.withUnsafeBufferPointer { (buf) -> Int in reboundToInt(pointer: buf.baseAddress!) } print(String(format: "%016llx", a), a == Int(bitPattern: 0x4131211140302010)) let b = array.withUnsafeBufferPointer { (buf) -> Int in reboundToInt(pointer: buf.baseAddress!.advanced(by: 1)) } print(String(format: "%016llx", b), b == Int(bitPattern: 0x9941312111403020)) let c = array.withUnsafeBufferPointer { (buf) -> Int in assumeToInt(pointer: buf.baseAddress!) } print(String(format: "%016llx", c), c == Int(bitPattern: 0x4131211140302010)) let d = array.withUnsafeBufferPointer { (buf) -> Int in assumeToInt(pointer: buf.baseAddress!.advanced(by: 1)) } print(String(format: "%016llx", d), d == Int(bitPattern: 0x9941312111403020))

4131211140302010 true 9941312111403020 true [assume] p: 156675312 [assume] intp: 156675312 4131211140302010 true [assume] p: 156675313 [assume] intp: 156675313 9941312111403020 true

ええー

@swift-5.1.5

import Foundation let array: [UInt8] = [ 0x10, 0x20, 0x30, 0x40, 0x11, 0x21, 0x31, 0x41, 0x99] func reboundToInt(pointer: UnsafePointer<UInt8>) -> Int { return pointer.withMemoryRebound(to: Int.self, capacity: 1) { (ip) in ip.pointee } } func assumeToInt(pointer: UnsafePointer<UInt8>) -> Int { let intp = UnsafeRawPointer(pointer).assumingMemoryBound(to: Int.self) print("[assume] p: \(Int(bitPattern: pointer))") print("[assume] intp: \(Int(bitPattern: intp))") return intp.pointee } func loadAsInt(pointer: UnsafePointer<UInt8>) -> Int { return UnsafeRawPointer(pointer).load(as: Int.self) } let a = array.withUnsafeBufferPointer { (buf) -> Int in reboundToInt(pointer: buf.baseAddress!) } print(String(format: "%016llx", a), a == Int(bitPattern: 0x4131211140302010)) let b = array.withUnsafeBufferPointer { (buf) -> Int in reboundToInt(pointer: buf.baseAddress!.advanced(by: 1)) } print(String(format: "%016llx", b), b == Int(bitPattern: 0x9941312111403020)) let c = array.withUnsafeBufferPointer { (buf) -> Int in assumeToInt(pointer: buf.baseAddress!) } print(String(format: "%016llx", c), c == Int(bitPattern: 0x4131211140302010)) let d = array.withUnsafeBufferPointer { (buf) -> Int in assumeToInt(pointer: buf.baseAddress!.advanced(by: 1)) } print(String(format: "%016llx", d), d == Int(bitPattern: 0x9941312111403020)) let e = array.withUnsafeBufferPointer { (buf) -> Int in loadAsInt(pointer: buf.baseAddress!) } print(String(format: "%016llx", e), e == Int(bitPattern: 0x4131211140302010)) let f = array.withUnsafeBufferPointer { (buf) -> Int in loadAsInt(pointer: buf.baseAddress!.advanced(by: 1)) } print(String(format: "%016llx", f), f == Int(bitPattern: 0x9941312111403020))

(edited)

exit status: 4 with stderr:

Fatal error: load from misaligned raw pointer Current stack trace: 0 libswiftCore.so 0x00007f98e95ea3c0 swift_reportError + 50 1 libswiftCore.so 0x00007f98e965b230 _swift_stdlib_reportFatalError + 69 2 libswiftCore.so 0x00007f98e9556c07 <unavailable> + 3349511 3 libswiftCore.so 0x00007f98e94063c0 UnsafeRawPointer.load<A>(fromByteOffset:as:) + 88 8 libswiftCore.so 0x00007f98e93633b0 Array.withUnsafeBufferPointer<A>(_:) + 38 10 swift 0x00000000005283fe <unavailable> + 1213438 11 swift 0x000000000052cce2 <unavailable> + 1232098 12 swift 0x000000000051cdbf <unavailable> + 1166783 13 swift 0x000000000050b5e8 <unavailable> + 1095144 14 swift 0x0000000000506f41 <unavailable> + 1077057 15 swift 0x00000000004a033d <unavailable> + 656189 16 libc.so.6 0x00007f98ec28a740 __libc_start_main + 240 17 swift 0x000000000049feb9 <unavailable> + 655033 Stack dump: 0. Program arguments: /usr/bin/swift -frontend -interpret - -disable-objc-interop -I /Libraries/.build/x86_64-unknown-linux/debug -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOAtomics/include -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include -I /Libraries/.build/checkouts/OpenCombine/Sources/COpenCombineHelpers/include -module-cache-path /Libraries/.build/x86_64-unknown-linux/debug/ModuleCache -D DEBUG -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux/debug/CNIOAtomics.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include/module.modulemap -Xcc -fmodule-map-file=

(edited)

stderr.txt

https://file.io/smWdLE

なるほど〜〜〜

2:46 AM

UnsafePointer<T>の.pointeeはmemcpy semanticsだからアライメントエラーは起きないんだ

2:47 AM

UnsafeRawPointerの.loadが本当の生のポインターデリファレンスで、こっちはエラーが起きる。

2:47 AM

知らなかった。

知りませんでした。。。

つまり、メモリレイアウトレベルのハードキャストをしたいだけの状況であれば、UnsafePointer<T>を使う限りアライメントのことは忘れてよいっぽいですね

2:50 AM

一方で、最高速度を求めてメモリ操作したいのであれば、非効率な場合に死んでくれるUnsafeRawPointerを使ったほうが良い・・・？

2:50 AM

なんかそれも微妙な話だな。型ないし。

あ、でも、これってfatalErrorが出てるだけ？もしかして、fatalErrorが入ってなければ単に落ちないかもだけな可能性もある？

2:52 AM

最適化オプションで挙動が変わったりとかしないですかね。

fatalErrorが呼ばれているので本当に処理系からメモリ違反シグナル等が飛んでいるわけではないですね。でもfatalErrorに関しては-Ouncheckedでも無効化しないです。 uncheckedで消せるのはprecondition。 (edited)

3:52 AM

https://github.com/apple/swift/blob/5f80f77343d6d040a93f2c125e02093905aee228/stdlib/public/core/UnsafeRawPointer.swift#L354

apple/swift

The Swift Programming Language. Contribute to apple/swift development by creating an account on GitHub.

3:52 AM

むむ、debugPreconditionだ。

3:53 AM

4131211140302010 true 9941312111403020 true [assume] p: 4300947488 [assume] intp: 4300947488 4131211140302010 true [assume] p: 4300947489 [assume] intp: 4300947489 9941312111403020 true 4131211140302010 true 9941312111403020 true Program ended with exit code: 0

3:53 AM

手元のmac環境ではReleaseにするだけで通過しました。

なるほど。

手元のiPod touchでも、Releaseにするだけでおもちさんのコードが通過して全部trueになったので、アライメント違反で実行時エラーになるデバイスは今のところないのかも。

Swift Compiler Bot on macOSを動かすのに使えないかな。 https://www.macstadium.com/opensource

MacStadium Free/Open Source Project

Encouraging innovation through collaboration is one of MacStadium’s core beliefs. We know that despite finite resources, a lack of hardware, and limited support, tremendously important innovation is happening through free and open source software. Learn how MacStadium is he...

おお！

おおー

12:22 AM

PublicリポジトリならOKなのかな。とりあえず先に進んでみよう。

Formを送信したら今度はProject Logoを送る必要があるらしいけどどうするべきか。

12:39 AM

なんかロゴを作るしかない。

ロボットの鳥の絵を描けば良いのかな

おお！助かります

参考資料です

@kishikawakatsumi ペン入れツール無かったので線がぐちゃってしまった！

Linuxっぽい

もうちょっとお目々大きくしても良いかも

これはいいですね！

1:13 AM

参考資料が何の参考になったかサッパリわからないけど、出てきたものはすばらしい。

草

ペンギンなのはbotのためのツールなので飛べないと言うことで

1:14 AM

これ差し替え可能ですか？ペン入れしたものを後日用意します

1:14 AM

今日はそろそろ出ないと

1:14 AM

あともうちょっとロボットっぽくしたい

ASAPって書いてあるけど、向こうからさらにメールが送られてくるらしいので、今すぐってことはないでしょう。時差もあるし。というわけで納得がいくものができるまで保留しておくので、そんなに急がずやってください。

わーい、ありがとうございます

1

swiftってsandbox内で動くのかな？Xcode Serverはどうしてるのだろう？

Xcode Serverはsandbox使ってなかった。XcodeのPlaygroundも、macOSはsandbox使ってなかった。

@swift-5.1.5 if let line = readLine() { print(line) }

no output

@Kishikawa Katsumi

2:00 PM

ペン入れしてタイヤつけました。なんかちょっとアンバランスだな…

2:04 PM

やっぱこっちの方がいいですね！

2:05 PM

線太くしたいとかあれば対応するのでお知らせください〜 (edited)

下の方がいいですね。いったんこれを送ってみますよ。ありがとうございます

@swift-5.1.5 -version

Swift version 5.1 (swift-5.1.2-RELEASE) Target: x86_64-unknown-linux-gnu

Mac StadiumのOSS利用、許可されました

(edited)

7

おっ！！！

時間をみてMacホストのボットや、SwiftUI Playgroundとか作りたい。

mac版のbotがあるととても便利そう

2:52 AM

なんだかんだ時々挙動違うから。 (edited)

今のところ、フォームはそこそこ入力項目があったけどフォームで申請した以外のコミュニケーションは必要なかったので、簡単だった

@swift-5.1.5 @swift-5.0.3 @swift-4.2.4 public extension Int {}

no output

@swift-5.1.5 class Animal {} func f(_ a: AnyObject) { } f(Animal.self)

exit status: 1 with stderr:<stdin>:3:3: error: argument type 'Animal.Type' does not conform to expected type 'AnyObject' f(Animal.self) ^

@swift-5.1.5 -version

Swift version 5.1.2 (swift-5.1.2-RELEASE) Target: x86_64-unknown-linux-gnu

@swift-5.0.3 @swift-5.1.5

struct Pair<T, U> { let values: (T, U) init(_ t: T, _ u: U) { values = (t, u) } } let pair = Pair(1, "2") print(pair[keyPath: \Pair.values.0]) print(pair[keyPath: \Pair.values.1])

exit status: 1 with stderr:

<stdin>:9:7: error: value of type 'Pair<Int, String>' has no subscripts print(pair[keyPath: \Pair.values.0]) ^~~~ <stdin>:10:7: error: value of type 'Pair<Int, String>' has no subscripts print(pair[keyPath: \Pair.values.1]) ^~~~

1 2

@swift-5.1.5 -version

Swift version 5.1.3 (swift-5.1.3-RELEASE) Target: x86_64-unknown-linux-gnu

@swift-4.0.3 @swift-4.1.3 @swift-4.2.4 @swift-5.0.3 @swift-5.1.5 @swift-main let evens = (1...10).lazy .filter { ($0 % 2) == 0 } .filter { print($0, terminator: ","); return true } _ = evens.count

1

2,4,6,8,10,

1,2,3,4,5,6,7,8,9,10,

2,4,6,8,10,

@swift-5.1.5

let evens = (1...10).lazy .filter { ($0 % 2) == 0 } .filter { print($0, terminator: ","); return true } print("\nfirst", evens.first!, "\ncount:", evens.count)

1,2,1,2,3,4,5,6,7,8,9,10, first 2 count: 5

なるほど

@swift-5.1.5 @swift-5.0.3

protocol A { func isEquatable() -> Bool } extension A { func isEquatable() -> Bool { return false } } extension A where Self: Equatable { func isEquatable() -> Bool { return true } } struct Foo: A { } extension String: A { } print(Foo().isEquatable()) print(String().isEquatable())

(edited)

false true (edited)

せや5.0.3はreturnいるんじゃ

1:29 PM

これちょっと応用すればEquatableの時だけ動きを変えるのが簡単に書けそう

なるほど、Existentialにできないプロトコルの is P が書けるのか

ですね

1:30 PM

ただなんか不安定な気がします。半分動かない

1:30 PM

今手元に動かない型と動く型の混在したコードがあるが、分水嶺を見極められない

<T: P>　になってるコンテキストでちゃんと動くのかな？

1:31 PM

isEquatableがAのrequirementsだから大丈夫か。

動かないケースがあるんですよね

1:34 PM

@swift-5.1.5

protocol A { func isEquatable() -> Bool } extension A { func isEquatable() -> Bool { return false } } extension A where Self: Equatable { func isEquatable() -> Bool { return true } } struct Foo: A { } struct Foo2: A, Equatable { } extension String: A { } print("direct") print(Foo().isEquatable()) print(Foo2().isEquatable()) print(String().isEquatable()) func generics<X: A>(arg: X) { print(arg.isEquatable()) } func existential(arg: A) { print(arg.isEquatable()) } print("from generics") generics(arg: Foo()) generics(arg: Foo2()) generics(arg: String()) print("from existential") existential(arg: Foo()) existential(arg: Foo2()) existential(arg: String())

(edited)

direct false true true from generics false true true from existential false true true (edited)

すまん

1:34 PM

動いてるなぁ

うん

1:34 PM

Swift 5.1.?だとdynamic cond confが無かったからダメだったかも (edited)

これはcond confいらないんじゃないですかね

あ、ほんとだ

静的にwitness tableが決定できる気がする

いらないです

1:36 PM

ただ手元のコードで半分動いてない

きっと別のバグだ

@swift-5.1.5

protocol AnyEquatableBase { associatedtype Value var value: Value { get } func isEqual(to other: Self) -> Bool } extension AnyEquatableBase { func isEqual(to other: Self) -> Bool { false } } extension AnyEquatableBase where Value: Equatable { func isEqual(to other: Self) -> Bool { value == other.value } } struct AnyEquatable<T>: AnyEquatableBase { var value: T } print(AnyEquatable(value: "abc").isEqual(to: AnyEquatable(value: "abc"))) print(AnyEquatable(value: ()).isEqual(to: AnyEquatable(value: ()))) print(AnyEquatable(value: String.self).isEqual(to: AnyEquatable(value: String.self))) print(AnyEquatable(value: { }).isEqual(to: AnyEquatable(value: { })))

true false false false

AnyEquatable2020だw

2:08 PM

クソ便利な予感

2:11 PM

これに包めば今動いてないやつも動きそうだな

型パラによってwitness tableに載る実装を静的に切り替えるテクニック、結構使えそうですね

2:12 PM

おもしろい

最小ケース再現できてないですが、エッジケースで動かない

2:13 PM

俺の頭がおかしいかもしれない

2:15 PM

ちょっと飯作るので、動いてない途中のコミット貼っておきます。興味あったらチェックしてみて下さい。

2:17 PM

https://github.com/tarunon/UIViewBuilder/blob/implement/handlers/Sources/UIViewBuilder/Components/ModifiedContent.swift#L54-L85 ↑ここのwitnesstableが意図通りに作られれば↓のテストが通るはず https://github.com/tarunon/UIViewBuilder/blob/implement/handlers/Tests/UIViewBuilderTests/ViewModifierTests.swift#L12

tarunon/UIViewBuilder

Generate UIKit (not SwiftUI) components from FunctionBuilder. - tarunon/UIViewBuilder

tarunon/UIViewBuilder

Generate UIKit (not SwiftUI) components from FunctionBuilder. - tarunon/UIViewBuilder

inline(__always)の挙動ちゃんと把握してないんですけど、これ付いててもwitness method経由で呼ばれるんですかね

他の場所でもやってるので大丈夫です

2:19 PM

インライン化されてるかはわからないですが… (edited)

2:20 PM

https://github.com/tarunon/UIViewBuilder/blob/implement/handlers/Sources/UIViewBuilder/NativeRepresentable.swift#L67-L79 こっちは意図通りに動いています

tarunon/UIViewBuilder

Generate UIKit (not SwiftUI) components from FunctionBuilder. - tarunon/UIViewBuilder

あ、わかった

天才か

これどっちもWT経由の呼び出しになってないんじゃ無いですかね

デバッガでwt確認済みです

2:22 PM

Witness methodはテーブルに乗ってなくても経由される気がします

2:25 PM

プロトコルの要求に_differenceが無いのでWTに乗らず、静的にディスパッチされてるんじゃ無いですかね

2:26 PM

ベースになってる_Componentの要求なんですよね

本当だ…そしたら全く分からなくなった…

ここで1時間ぐらいハマってしまった。AnyEquatable2020を使うプランに切り替えます。偽equalityそこら中で使うので。

時間ある時にちゃんとみます

ぼくもこのテクニック使いたいので。

このコミットはこのまま置いておこう

もしかしたら、呼び出し時に型を参照できなくなってるかもしれないですね。その場合AnyEquatableでもダメだ (edited)

@swift-5.1.5

protocol AnyEquatableBase { associatedtype Value var value: Value { get } func isEqual(to other: Self) -> Bool } extension AnyEquatableBase { func isEqual(to other: Self) -> Bool { false } } extension AnyEquatableBase where Value: Equatable { func isEqual(to other: Self) -> Bool { value == other.value } } struct AnyEquatable<T>: AnyEquatableBase { var value: T } print(AnyEquatable(value: "abc" as Any).isEqual(to: AnyEquatable(value: "abc" as Any)))

false

こういうことだと思うんです

2:53 PM

やっぱり呼び出し元でEquatableが見えてないとAnyEquatableを作った瞬間にfalse側に倒れちゃいますね。上位から伝播させなければいけない

2:54 PM

@swift-5.1.5

protocol AnyEquatableBase { associatedtype Value var value: Value { get } func isEqual(to other: Self) -> Bool } extension AnyEquatableBase { func isEqual(to other: Self) -> Bool { false } } extension AnyEquatableBase where Value: Equatable { func isEqual(to other: Self) -> Bool { value == other.value } } struct AnyEquatable<T>: AnyEquatableBase { var value: T } func check<T>(lhs: T, rhs: T) -> Bool { AnyEquatable(value: lhs).isEqual(to: AnyEquatable(value: rhs)) } print(check(lhs: "test", rhs: "test"))

false

AnyEquatable<Any>になっちゃってると、Value: Equatableの評価がAnyに対して行われてしまって、

2:59 PM

Anyに入ってる実際の値の型では処理されないってこと？

そうです

なるほど。う～ん、それは正しい挙動だな。

3:00 PM

Anyにしまうことで型情報が消去されたと。

Generics内部でなんでこうなるかは謎だが

そうかなるほど

うわうわうわうわう

3:01 PM

@swift-5.1.5

protocol AnyEquatableBase { associatedtype Value var value: Value { get } func isEqual(to other: Self) -> Bool } extension AnyEquatableBase { func isEqual(to other: Self) -> Bool { false } } extension AnyEquatableBase where Value: Equatable { func isEqual(to other: Self) -> Bool { value == other.value } } struct AnyEquatable<T>: AnyEquatableBase { var value: T } func check<T>(lhs: T, rhs: T) { print(AnyEquatable(value: lhs)) print(AnyEquatable(value: lhs).isEqual(to: AnyEquatable(value: rhs))) } func check2(lhs: String, rhs: String) { print(AnyEquatable(value: lhs)) print(AnyEquatable(value: lhs).isEqual(to: AnyEquatable(value: rhs))) } check(lhs: "test", rhs: "test") check2(lhs: "test", rhs: "test")

AnyEquatable<String>(value: "test") false AnyEquatable<String>(value: "test") true

シュレディンガーの猫みたいな動きをするな

お～

同じ型なのにwtの参照先が違うのはやばいなw

バグっぽい

いやー、これは無理じゃ無いですかねー

Anyで潰れるのは許せると思うんですが

3:03 PM

GenericsでStringが渡ったのに潰れるのは微妙では

3:04 PM

AnyEquatable<Any>(value: "test")なら良い

checkがWTを受け取るようになってないから現状のABIでは厳しそう

ふむー

ん？TとしてRuntimeにString.selfは渡ってきていて

3:05 PM

String.selfからEquatable conformance for StringのWTはダイナミックに取れない？

3:06 PM

そうじゃないのか？ AnyEquatable<$T> みたいなものとして静的に解決している？

取れることは取れるんですけど、本来それは呼び出し元でコンフォーマンスを取得してcheckに渡す形になるはずで、checkの中で任意の型に対して毎回コンフォーマンスを取得するのはコストが大きい気がします

クエリ自体でキャッシュされるはず

それはそうですけど…

とりあえずバグレポいってみよう

そうですね

dup探すのむずそう。

きびしーね

まあとりあえず現状のふるまいとしては

3:08 PM

extensionの解決は一般のTでコンパイル時に確定しているってことね

3:08 PM

これそうか、

3:09 PM

func check3<T: Equatable>(...) {}

そうです

↑これも作っておけばよいのね

そうそう

まあそこをオーバーロードで解決が丸いかな

3:09 PM

因みに

めんどいけど対応はできるね

挙動からの推測ですが、おもちさんのextensionを使った擬似open existentialで

3:10 PM

この壁を突破できる予感があります。少なくともそうでないと、私のコードが動いてる理由がよくわからない。

たしかに。

今回消滅を起こしてる箇所はわかっていて

3:10 PM

そこをなんとかできないかこれから試す

3:11 PM

あ、擬似open existential、これでもかというほど役に立っています。ありがとう

ただの

3:11 PM

Anyにextensionはやせたっけ

だめ

じゃあだめだ

3:11 PM

疑似ってか本物のopenだと思う (edited)

Equatable確認したいよprotocolを作れば良い

ああそっか。

3:12 PM

便利だよね

3:12 PM

知らないとかけないコード結構ある

3:13 PM

僕が呼び方を名付けるとしたら、existential extensionによる間接open、とかかな

あ、ダメだった

3:14 PM

@swift-5.1.5

protocol AnyEquatableBase { associatedtype Value var value: Value { get } func isEqual(to other: Self) -> Bool } extension AnyEquatableBase { func isEqual(to other: Self) -> Bool { false } } extension AnyEquatableBase where Value: Equatable { func isEqual(to other: Self) -> Bool { value == other.value } } protocol MaybeEquatable { } extension MaybeEquatable { func isEqual(to other: Self) -> Bool { AnyEquatable(value: self).isEqual(to: AnyEquatable(value: other)) } } struct AnyEquatable<T>: AnyEquatableBase { var value: T } extension String: MaybeEquatable {} func check<T: MaybeEquatable>(lhs: T, rhs: T) { print(lhs.isEqual(to: rhs)) } func check2(lhs: String, rhs: String) { print(AnyEquatable(value: lhs), AnyEquatable(value: lhs).isEqual(to: AnyEquatable(value: rhs))) } check(lhs: "test", rhs: "test") check2(lhs: "test", rhs: "test")

false AnyEquatable<String>(value: "test") true

だめです

Selfの型が静的に決まっちゃうからダメなのかー

雑に探した感じ特に無さそうなのでダブってたら閉じてもらおう

なんか俺が思ったのと違うな　ちょっとやってみる

3:25 PM

あー、事前に対象の型を extension Cat: MaybeEquatable {} しておかないといけない。

ん、してあると思う

3:25 PM

あ、Tにってことか！

AnyEquatableのTに制約として T: MaybeEquatable した上で

3:26 PM

Cat: MaybeEquatable みたいな。

おk理解

3:26 PM

しかしそこまで行くと使いたいかっていうとウーンだな

うむ。

3:27 PM

結局 check3 をオーバーロードするか

MaybeEquatableをpublicにしなきゃいけない、バッちすぎ

扱いたい型全部にそれを付けるかになる

3:27 PM

use-site overloadかtype-decl site conformanceか、みたいな・・・

use-siteじゃなくても、型の要求する関数の宣言箇所でEquatableを条件にしたWTがあれば、一応open existentialで動く。私のコードはそれでもって動いてるからなぁ (edited)

制約のないT　から実行時に T: P で分岐する事は不可能なのかな？ (edited)

それは可能

3:33 PM

上の方に貼った動いてる方のコード、がそれを実現してる

3:33 PM

あー

3:33 PM

正確にはComponentのProtocolでは縛られてるから

3:34 PM

関係のない型で縛る必要はあると思う

どれだ

3:34 PM

ああ

3:34 PM

そうね、なにか引っ掛けるためのプロトコルが必要

3:34 PM

なにもない T だったらってこと。

3:34 PM

やはりRuntime APIを使う必要があるな

無から有は作れないか〜

// witness_table* swift_conformsToProtocol(type*, protocol*);

3:36 PM

ただこれ使ってもそこから先も工夫が必要なんだよな、witness tableで、どうすんのっていう

これが使えたところで==の呼び出しが叶わなければ無駄

3:37 PM

今回のハックの激アツだったところは無から==が呼び出せる可能性があったからなのだ

witness tableから static funcを引っ張ってこないといけない

3:37 PM

つまりwitness method callの自作

3:38 PM

いや、なんかerasureを用意してそれのinit呼び出しにすればいいのかまあそれもgeneric method callですが

3:39 PM

厳しいな、swift calling conventionがC言語から使えないから

3:40 PM

マシンごとにアセンブリでレジスタ登録して呼び出さないとダメそう

3:42 PM

うーん

3:43 PM

swiftselfもswifterrorも関係ないからC言語で辻褄合わせた関数シグネチャ作ったらABIが合う気がしなくもない

うーんBaseProtocolの中にこっそり混ぜる分にはアリな気がしてきた>MaybeEquatable

3:48 PM

ちょっとこれ無しでValue:Equatableハックは複雑な型だと厳しすぎる

3:51 PM

どうせprotocolで引っ掛けてるならやってること一緒なんだよな

再現できなかった

4:11 PM

全てがGenericsで渡ってるとうまく動く、一回でもExistentialに墜ちるとダメっぽい。じゃあ私のコードはなぜ動いていたの

解決しました。 Existentialになった型自身でWTの探索をさせるのがポイントだったようです。一般化した実装をつくりました。 https://gist.github.com/tarunon/85bdeccf8bc8f44b7b27d4974e0a843f

MaybeEquatable.swift

GitHub Gist: instantly share code, notes, and snippets.

これだと、AnyEquatableのinitのところで、E:Equatableの制約を静的に見てるから

1:16 AM

結局制約のないTのパターンのcheckだと無理なのは一緒に見える

それはそう、なのでMaybeEquatableを外側に置いて、そこからAnyEquatableを生成する事でその課題をクリアしている

ああ、出発点(ユーザーが触る方)はそっちか。

1:18 AM

これは、extensionのisEqualの中からだと

1:19 AM

動的な判定でSelf:Equatableのwhereの方を呼び出せるってこと？

そういうことです

よし、理解あってた

公開するProtocolのベースにMaybeEquatableを使う事で、ユーザーサイドで付与したEquatableを使って動作を切り替えることができる

やはりexistential extension openは魔法的だ

魔法ですねぇ

1:20 AM

しかもこれ、ちょっと作り方違うと動かないので

あ〜　簡単にしようとしたら、 MaybeEquatableにSelfが入ってダウンキャストできなくなったｗ

でしょw

でももうちょっときれいにできる気がするなあ

AnyEquatableとMaybeEquatableの関係が、この間Twitterで言ってた逆転させるprotocolのテクニックです

1:35 AM

型消去を使ってprotocolの宣言を外しつつwtを別の場所に移動させる

これでどうだろうか https://gist.github.com/omochi/80f8318eebf31d952e7472793c4dce78

MaybeEquatable.swift

GitHub Gist: instantly share code, notes, and snippets.

私のやつ、public protocolにwtを乗せたくなかったからわけていたのだ

どういう意味？

_isEqualとか__isEqualをユーザーサイドで実装したり呼び出したり、を出来ないようにしたかった

asAnyEquatable().isEqual()が呼び出せるのは良いのか

そこinternalにできるよ

あ〜

AnyEquatableの存在だけをpublicにして、他のすべてを封印できる

func anyIsEqual　と asAnyEquatable だけが見えてて

そういうテクニックですだ

2:03 AM

そうそう

AnyEquatableの機能は使えない

2:03 AM

って状態にできるのね。

確かにもうちょい減らせる気がしてきたな

いらんprotocol減らしてあとは比較対象の方は値しか使わない(関数は利用されてない)のでopenしなくて良さそう

as? T でいいよね。 (edited)

そうね

う〜ん不思議だ、継承boxを作らないでやろうとすると何かしら詰まる。

継承boxが==をキャプチャするのがミソと思われる

https://gist.github.com/omochi/b68706b90134db8c3771195da170d4b5

MaybeEquatable2.swift

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2:38 AM

できた。 MaybeEquatable.isEqual(to)と MaybeEquatable.eraseToOpaqueEquatable()と ErasedOpaqueEquatableしか露出していない。 ErasedOpaqueEquatableのメンバは全部隠した。 (edited)

めっちゃいい

erasureは外側はなくして継承Boxそのままにした。 (edited)

そうか、どうせ公開しないなら外側が要らなくなるのね

ErasedOpaqueEquatableもpublicだけどopenじゃないからユーザー継承もできないし。

継承消せたw

3:18 AM

@swift-5.1.5

public protocol MaybeEquatable { func eraseToOpaqueEquatable() -> ErasedOpaqueEquatable } extension MaybeEquatable { public func isEqual(to other: Any) -> Bool { eraseToOpaqueEquatable().isEqualTo(other) } } extension MaybeEquatable { public func eraseToOpaqueEquatable() -> ErasedOpaqueEquatable { ErasedOpaqueEquatable() } } extension MaybeEquatable where Self: Equatable { public func eraseToOpaqueEquatable() -> ErasedOpaqueEquatable { ErasedOpaqueEquatable(value: self) } } public struct ErasedOpaqueEquatable { var isEqualTo: (Any) -> Bool init() { isEqualTo = { _ in false } } init<T: Equatable>(value: T) { isEqualTo = { value == $0 as? T } } } // end user interface public func anyIsEqual(_ a: Any, _ b: Any) -> Bool { guard let a = a as? MaybeEquatable else { return false } return a.isEqual(to: b) } // you need to mark your type extension String: MaybeEquatable {} print(anyIsEqual("str", "str")) // => true print(anyIsEqual({}, {})) // => false

おお

true false

これが一番短いと思います

あ〜ｗクロージャねｗ

3:19 AM

確かにクロージャってそもそもが型Fに対して

3:19 AM

値で実装を分けてるから

3:19 AM

ベースクロージャ型と、個別のクロージャ式に対応する型の

3:19 AM

アドホックな継承関係なんだよな

うむ

今回はどうせ処理を切り分けたいだけの継承だからクロージャでもいいか。強いて言えば若干デバッグしづらいかな。

まあここをデバッグする事はあんまり無さそう

そうすると、ErasedOpaqueEquatableもなくして、 (Any)->Bool　を返すのもありだな

お、なるほど

func partialApplySelfToIsEqual() -> (Any) -> Bool

ヤベェ関数が生えたw

まあユーザーにこれが見えるのと、ErasedOpaqueEquatableが見えるの、どっちが良いかって択だな

typealiasにして誤魔化すのはどうだろう

3:24 AM

typealias PartialAppySelfToIsEqual = (Any)->Bool

ユーザーからするとErasedOpaqueEquatableはその先のisEqualの呼び出しができないけど

3:26 AM

typealias PartialAppySelfToIsEqualは、関数としての呼び出しができるという意味では

3:26 AM

露出はやっぱり増えてるね

確かに

3:27 AM

コードは圧倒的に短いな、4ブロックだ

そういう意味ではさっきのtarunonのやつが露出最小の場合の実装最小な気がする

まあでも実質的にisEqual(to:)呼ぶのと変わらんけ

露出をちょっと許すなら partialApplySelfToIsEqualだと思う

3:27 AM

うん。そうね。

実行時に軽い方でもいい気がする

3:27 AM

ヘッダーから見える世界はこう

3:28 AM

綺麗では

typealiasなのも見えるでしょ？

typealiasも見えてるけど

3:28 AM

まあ許せる範囲かな

3:29 AM

しかしこのテクニック凄いね、今までできなかったことが出来るようになった

まあMaybeEquatableでマーキングするという作業は残っちゃってるけどね

3:30 AM

実行時ダウンキャストで where を復元できるのは面白い。

protocol conformingを通してexistentialを作れないprotocolへのダウンキャストを実装する、という手法かな

3:31 AM

open existentialと並ぶ革命だわ

そうだね、PATへのダウンキャストを普通のprotocolを一回挟むとできる

3:31 AM

業務だと、

3:31 AM

レスポンスの型を登録しておいて

3:32 AM

レスポンスの中にあるtypeってフィールドを見て、対応するレスポンスの型を動的にdecodeする、

3:32 AM

みたいなパターンで似たような事をしていた

3:33 AM

リクエストの型のassociatedtypeからレスポンスの型をジェネリクスで引っ張るのが一般的だと思うんだけど

3:33 AM

正常系のレスポンスはそれで良いとして、エラーレスポンスも型付けしたいからそうしてた

APIの話だと私の書いたコードだとエラーもあらかじめ型付けしてあってレスポンス同様にデコードしてたな

普通にやるとエラーをデコードしてる処理を、エラーの種類を足すごとに追加するか、リクエストに対して固定のエラー型にならない？

protocol Request { associatedtype Response associatedtype Error }

そうよね。

これで事足りる気がするけど

let possibleErrorTypes: [APIResponseErrorProtocol.Type] = [LoginError.self, ValidationError.self, ...]

3:37 AM

こういう感じに配列で登録しておいてどんな型のエラーも飛ばせるようにした感じ。

ほー

3:37 AM

enumじゃだめなん

enumにした場合、結局、そのenumのdecodeを書くところで

3:38 AM

JSONのtypeフィールドの文字列を見て、switch-caseで

3:38 AM

type文字列ごとに対応するcaseをdecodeするって処理を

3:38 AM

書く部分が出てくるでしょ？

配列だと出ない？

でない。

enumだと、

普通にやるとエラーをデコードしてる処理を、エラーの種類を足すごとに追加するか、リクエストに対して固定のエラー型にならない？

↑で書いたように、エラーの種類を足すごとに case を書かないといけない

3:39 AM

配列に入れておいて、

3:40 AM

protocol APIResponseErrorProtocol: Decodable { static var typeName: String { get } }

3:40 AM

↑こうしておいて、

3:40 AM

あとはループしながらtypeNameの対応がみつかったらDecodableでdecode

3:40 AM

って形にすると、エラーの型を定義して、possibleErrorTypes配列にメタタイプを追加していくだけで

3:41 AM

decodeのcaseの追加はしなくて良くなる。

そうすると取り出す側はキャストにならない？

取り出す側はキャストになる。

Error型だから別にいいやって感じか

でもそれは、 do { } catch { } してるとき、いつもそうだから。

3:41 AM

てか、結局の所throwすることになって、画面レベルの根っこのcatchで分岐する感じ。

3:42 AM

エラーレスポンスがそのままアプリの中のエラーとしてthrowされてくる状態。

なるほどね

Error型だから別にいいやって感じか

そういうことやね (edited)

私が書いたのはAPIの関数の返り値はAsync<Result<T,E>>だから、型がしっかりしてるモチベが高いから

3:44 AM

あとエンドポイントごとにエラー型を明示的に定義したいモチベもあったのでそういう作りになっていたのだ

3:44 AM

enumでもデコード処理をループで書くのは昔作ったから、それでもいい気はしたけど、まあ色々根底が違いそうである

enumでもデコード処理をループで書く

このケースで同じことをやってそうな気がする

そんな気はするね

3:47 AM

今回の価値はextension Tと、extension T where Self: Uが、きちんと期待通りに動くケースを一般化できたことだな

それで、そのループするために、メタタイプを登録していくと、要素が APIResponseErrorProtocol.Type になるから、 existential openを使わないと init(from decoder: Decoder) が呼べないという話

なるほどね

今回の価値はextension Tと、extension T where Self: Uが、きちんと期待通りに動くケース

3:52 AM

そうね

3:52 AM

protocol requirementsにエントリがあってwitness tableに載ってると、 existential extensionのselfからのメソッド呼び出しでディスパッチできる。

try swiftのltにもっていこうかしら、このサイズなら収まりそう

Equatableにダウンキャストできないよね、ってところから流れで行けばまとまりそう

3:59 AM

ただexistential openが結構深いトリックであるってことはスルーされそうだ

聴衆はそもそもGenericsとExistentialの違いもアヤフヤな人が多い想定なので、敢えてそこは解説しないでいいと思う

できることの結果だけ話すってことね。

条件と結果、一般化できるぞいというところまでだな。

たしかにタルノンが発表する時ってそういう構成の事が多いな

いやだって…

いやいや・・・

できました https://github.com/kateinoigakukun/AnyEquatable

kateinoigakukun/AnyEquatable

Contribute to kateinoigakukun/AnyEquatable development by creating an account on GitHub.

12:04 PM

SPMがCとSwiftの混じったターゲットを作れないので微妙にシンボルが公開されちゃってますが、手でリンクすればisEqualだけ公開するようにできるはず

12:07 PM

こんな感じで使えます https://github.com/kateinoigakukun/AnyEquatable/blob/master/Tests/AnyEquatableTests/AnyEquatableTests.swift

kateinoigakukun/AnyEquatable

Contribute to kateinoigakukun/AnyEquatable development by creating an account on GitHub.

すごww

12:23 PM

C経由でSwiftRuntimeを無理やりこねくり回すの、禁断の果実感あって良いですね

ミソはwitness methodの呼び出しをSwift側に移譲してる部分です

これはC部分はどうしてもSwiftだとかけない感じですか？

書けそう！

書けない理由が特に無さそうに見えたので

最初はもうちょっと込み入ったことをしようとしてたんですけど結局シンプルにできたのでフルSwiftで書けそう

12:29 PM

あー、フルは無理でした

1

12:30 PM

ProtocolDescriptorをシンボル経由で抜いてるんですけど、そこで@_silgen_nameが使えなかった…

なるほど

いや、dlsymすればいいのか (edited)

dlsymはXcode環境下で謎に動かない場合があるので

12:31 PM

動くかチェックは必要そう

12:32 PM

動かない場合も退避先にMachO使えるし何とかなるんじゃないかな

これが限界でした https://github.com/kateinoigakukun/AnyEquatable/blob/master/Sources/AnyEquatableRuntime/AnyEquatableRuntime.c

kateinoigakukun/AnyEquatable

Contribute to kateinoigakukun/AnyEquatable development by creating an account on GitHub.

1:14 PM

Swift関数にメタタイプとWTを差し込むためにはC側から呼んでやらないとダメなんですよねー

あれ、やろうと思ってたらもうできちゃった？

@convention(c)をつけた関数ポインタの首を挿げ替えて無理やりコールは出来ないかな

import Foundation let RTLD_DEFAULT = UnsafeMutableRawPointer(bitPattern: -2) @_silgen_name("foo") func foo() {} let fooPtr = { dlsym(RTLD_DEFAULT, "foo")!.assumingMemoryBound(to: (() -> Void).self) }() fooPtr.pointee

1:29 PM

これがクラッシュするんですよね、デリファレンスした瞬間にbad accessになる (edited)

1:30 PM

@convention(c)どこにもつけられなくて困った

こんな感じにすると@convention(c)使える。

import Foundation public func isEqual(_ lhs: Any, _ rhs: Any) -> Bool { let lhsType = type(of: lhs) let rhsType = type(of: rhs) guard lhsType == rhsType else { return false } guard let witnessTable = swift_conformsToProtocol(lhsType, EquatableProtocolDescriptor) else { return false } let theType = unsafeBitCast(lhsType, to: UnsafeRawPointer.self) return withUnsafePointer(to: lhs) { lhsPtr in withUnsafePointer(to: rhs) { rhsPtr in AnyEquatable_internalIsEqual(lhsPtr, rhsPtr, theType, witnessTable) } } } @_silgen_name("swift_conformsToProtocol") func swift_conformsToProtocol(_: Any.Type, _: UnsafeRawPointer) -> UnsafeRawPointer? func load<T>(symbol: String) -> T { if let sym = dlsym(dlopen(nil, RTLD_LAZY), symbol) { return unsafeBitCast(sym, to: T.self) } let errorString = String(validatingUTF8: dlerror()) fatalError("Finding symbol \(symbol) failed: \(errorString ?? "unknown error")") } let AnyEquatable_internalIsEqual: @convention(c) (UnsafeRawPointer, UnsafeRawPointer, UnsafeRawPointer, UnsafeRawPointer) -> Bool = load(symbol: "AnyEquatable_internalIsEqual") let EquatableProtocolDescriptor: UnsafeRawPointer = load(symbol: "$sSQMp") @_silgen_name("AnyEquatable_internalIsEqual") func _internalIsEqual<T: Equatable>(_ lhs: T, rhs: T) -> Bool { return lhs == rhs }

(edited)

9:08 AM

しかし、LinuxだとシンボルAnyEquatable_internalIsEqualを見つけられないな。

なるほどなるほど

12:39 PM

Linuxでシンボル見つけられないのはなんでだろう…

12:43 PM

そもそも、フルSwiftで書くためにわざわざダイナミックリンクするのは微妙な気がしてきた (edited)

面白いけど、実際に使おうとは思えないですね。

swift52ボット、新規で作るか、swift40ボットを動かしてるHeroku環境を流用してしまおうか、迷う。

どういう違いがあるんですか？

一つのボットに一つのherokuアカウントを使う構成なのです。

4:01 AM

流用すればアカウントを増やさずに済む。swift40ボットは無くなるけど。

4:06 AM

ボットを使う側に対しては「swift40ボットにまだ生き残って欲しいか？」という質問になりますね。

4系は4.2が生きていれば良さそうに思えます。Xcodeもそうだし。

あ、そういう意味ですか。なんとなく残っていたら便利かなと思います。

追加するかな。

@swift-5.2.5 -version

Swift version 5.2-dev (Swift 74df1132af) Target: x86_64-unknown-linux-gnu

@swift-5.2.5

struct SimpleCallable { func callAsFunction(_ x: Float) -> Float { return x } } let foo = SimpleCallable() print(foo(1)) print(foo(foo(1)))

1.0 1.0

@swift-main func f(g: @escaping () -> Void) { } class C { var name = "tama" func main() { f { [self] in print(name) } } }

no output

@swift-5.2.5 func f(g: @escaping () -> Void) { } class C { var name = "tama" func main() { f { [self] in print(name) } } }

exit status: 1 with stderr:

<stdin>:7:13: error: reference to property 'name' in closure requires explicit 'self.' to make capture semantics explicit print(name) ^ self. <stdin>:6:10: warning: capture 'self' was never used f { [self] in ^

SE-0269入ってた https://github.com/apple/swift/pull/23934

Allow implicit self in escaping closures when self usage is unlike...

Update the lookup logic for closures to allow resolution of implicit self to resolve to any direct captures of self (e.g. { [self] in ... }) in closures. Also introduce new diagnostic logic to sugg...

@swiftbot #if os(Linux) print("Running on Linux") #else print("Running on macOS") #endif

kishikawakatsumi

#if os(Linux) print("Running on Linux") #else print("Running on macOS") #endif

Version:

swift-5.1.3-RELEASE

Output:

Running on Linux

Error:

@swiftbot --platform=mac #if os(Linux) print("Running on Linux") #else print("Running on macOS") #endif

kishikawakatsumi

#if os(Linux) print("Running on Linux") #else print("Running on macOS") #endif

Version:

Apple Swift version 5.1.3 (swiftlang-1100.0.282.1 clang-1100.0.33.15) Target: x86_64-apple-darwin19.2.0

Output:

Running on macOS

Error:

とりあえずMac上の実行サポートしました。Macで動作が変わるコードってどんなんでしたっけ？

@swiftbot --platform=mac class C {} let a = C.self as AnyObject

omochimetaru

class C {} let a = C.self as AnyObject

Version:

Apple Swift version 5.1.3 (swiftlang-1100.0.282.1 clang-1100.0.33.15) Target: x86_64-apple-darwin19.2.0

Output:

Error:

@swiftbot --platform=linux class C {} func f(_ a: AnyObject) {} f(C.self) (edited)

(edited)

omochimetaru

class C {} func f(_ a: AnyObject) {} f(C.self)

Version:

swift-5.1.3-RELEASE

Output:

Error:

/usercode/main.swift:3:3: error: argument type 'C.Type' does not conform to expected type 'AnyObject' f(C.self) ^

@swiftbot --platform=mac class C {} func f(_ a: AnyObject) {} f(C.self)

omochimetaru

class C {} func f(_ a: AnyObject) {} f(C.self)

Version:

Apple Swift version 5.1.3 (swiftlang-1100.0.282.1 clang-1100.0.33.15) Target: x86_64-apple-darwin19.2.0

Output:

Error:

おーmacだ

@swiftbot

struct Example { var value: some Equatable { 1 } } struct Foo { typealias Body = @_opaqueReturnTypeOf("$s4main7ExampleV5valueQrvp", 0) 🦸 } print(Foo.Body.self)

nanasi

struct Example { var value: some Equatable { 1 } } struct Foo { typealias Body = @_opaqueReturnTypeOf("$s4main7ExampleV5valueQrvp", 0) 🦸 } print(Foo.Body.self)

Version:

swift-5.1.3-RELEASE

Output:

Int

Error:

@swiftbot

@propertyWrapper struct Generics<T> { var wrappedValue: T { 100 as! T } init(_ type: T.Type = T.self) {} } struct Example { @Generics(Int.self) var value } print(Example().value)

nanasi

@propertyWrapper struct Generics<T> { var wrappedValue: T { 100 as! T } init(_ type: T.Type = T.self) {} } struct Example { @Generics(Int.self) var value } print(Example().value)

Version:

swift-5.1.3-RELEASE

Output:

100

Error:

@swiftbot

@propertyWrapper struct NoGenerics { var wrappedValue: Int { 100 } } struct Example { @NoGenerics var value } print(Example().value)

nanasi

@propertyWrapper struct NoGenerics { var wrappedValue: Int { 100 } } struct Example { @NoGenerics var value } print(Example().value)

Version:

swift-5.1.3-RELEASE

Output:

Error:

/usercode/main.swift:7:21: error: type annotation missing in pattern @NoGenerics var value ^

@swiftbot

@propertyWrapper struct NoGenerics { var wrappedValue: Int { 100 } } struct Example { @NoGenerics() var value } print(Example().value)

nanasi

@propertyWrapper struct NoGenerics { var wrappedValue: Int { 100 } } struct Example { @NoGenerics() var value } print(Example().value)

Version:

swift-5.1.3-RELEASE

Output:

100

Error:

明示的なイニシャライザ呼び出しがあると型を省略できるのか

ｗｗ

7:06 AM

微妙な推論器の走らせ方の違いが引き起こしてそうだ。

@swift-5.1.5

class Cat { private let _bow: String = "にゃー" var bow: String { get { _bow } _modify { yield &_bow } } } var tama = Cat() tama.a = "わん" print(tama.a)

exit status: 1 with stderr:

<stdin>:8:20: error: cannot assign to property: '_bow' is a 'let' constant yield &_bow ^~~~ <stdin>:2:13: note: change 'let' to 'var' to make it mutable private let _bow: String = "にゃー" <stdin>:13:6: error: value of type 'Cat' has no member 'a' tama.a = "わん" <stdin>:14:12: error: value of type 'Cat' has no member 'a' print(tama.a) ~~~~ ^

あ、みすってた

1:44 AM

@swift-5.1.5

class Cat { let _bow: String = "にゃー" var bow: String { get { _bow } _modify { yield &_bow } } } var tama = Cat() tama.bow = "わん" print(tama.bow)

exit status: 1 with stderr:

<stdin>:8:20: error: cannot assign to property: '_bow' is a 'let' constant yield &_bow ^~~~ <stdin>:2:5: note: change 'let' to 'var' to make it mutable let _bow: String = "にゃー"

まあそうか

~~でもこれ僕のプロジェクトだとコンパイルとおってるの不思議だ~~ 見間違えだった (edited)

あ、コンパイルとおった Apple Swift version 5.1.3 (swiftlang-1100.0.282.1 clang-1100.0.33.15) Target: x86_64-apple-darwin18.6.0 だと

class Neko { private let _bow: String = "にゃん" var bow: String { get { _bow } _modify { yield &bow } } } let cat = Neko() cat.bow = "わん" print(cat.bow)

は通るっぽい、多分もう修正されてるってことかな

それ実行したら無限ループしないのか

あ、たしかに

2:01 AM

あ、あんだーばーが抜けてましたね

2:02 AM

凡ミスで草ですね

2:02 AM

ちゃんとエラーでた、失礼しました

‍♂️ (edited)

exit status: 1 with stderr:<stdin>:5:30: error: type 'C2' constrained to non-protocol, non-class type 'Self.X' associatedtype X where C2: X ^

ボットの不調、Herokuのログシステムにも障害が起きてて、不調だった際のログが残ってない。 https://status.heroku.com

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クラウドレベルでのトラブなのか。

外部へ送ってるログを見ると、swift50ボットだけリクエストを受け付けたログに漏れがある様なので、swift50ボットだけ影響を受けてたぽい。

1

@swift-5.1.5 -version

Swift version 5.1.4 (swift-5.1.4-RELEASE) Target: x86_64-unknown-linux-gnu

5.1.4が12時間くらい前にひっそりリリースされてるんですね。

リリースタグがついてからswift.orgに現れるまでは、毎回かなり時間がかかりますね。

あら、そうなんですね。

タグが付いたらすぐにswift.orgで公開されるスナップショットと違って、リリースはタグ付けから公開までの時間がまちまちだから、たぶん途中に手作業が入ってる。

@swiftbot --version=3.0.1

class Foo { private var fooPrivate = "private property" } extension Foo { func bar() -> String { return fooPrivate } } print(Foo().bar())

kishikawakatsumi

class Foo { private var fooPrivate = "private property" } extension Foo { func bar() -> String { return fooPrivate } } print(Foo().bar())

Version:

swift-3.0.1-RELEASE

Output:

Error:

/usercode/main.swift:7:16: error: 'fooPrivate' is inaccessible due to 'private' protection level return fooPrivate ^ /usercode/main.swift:2:17: note: 'fooPrivate' declared here private var fooPrivate = "private property" ^

@swift-5.2.5

@dynamicMemberLookup public protocol Entity { associatedtype Identifier associatedtype Props var id: Identifier { get } var props: Props { get set } } extension Entity { public typealias SegFaultHere<T> = T @inlinable public subscript <Value>(dynamicMember keyPath: WritableKeyPath<Props, Value>) -> Value { get { props[keyPath: keyPath] } set { props[keyPath: keyPath] = newValue } } }

no output

@swift-5.2.5

protocol CallAsFunction { func callAsFunction() } struct Foo: CallAsFunction { func callAsFunction() { print("foo") } } func call<C: CallAsFunction>(_ caller: C) { caller() } call(Foo())

foo

@swiftbot

struct Value: Hashable { let id = 5 } struct Value2: Hashable { let id = 5 func hash(into hasher: inout Hasher) { hasher.combine(id) } } enum EnumValue: Hashable { case a(Int) case b(Int) } enum EnumValue2: Hashable { case a(Int) case b(Int) func hash(into hasher: inout Hasher) { switch self { case .a(let v): hasher.combine(v) case .b(let v): hasher.combine(v) } } } print(5.hashValue) print(Value().hashValue) print(Value2().hashValue) print(EnumValue.a(5).hashValue) print(EnumValue.b(5).hashValue) print(EnumValue2.a(5).hashValue) print(EnumValue2.b(5).hashValue)

nanasi

struct Value: Hashable { let id = 5 } struct Value2: Hashable { let id = 5 func hash(into hasher: inout Hasher) { hasher.combine(id) } } enum EnumValue: Hashable { case a(Int) case b(Int) } enum EnumValue2: Hashable { case a(Int) case b(Int) func hash(into hasher: inout Hasher) { switch self { case .a(let v): hasher.combine(v) case .b(let v): hasher.combine(v) } } } print(5.hashValue) print(Value().hashValue) print(Value2().hashValue) print(EnumValue.a(5).hashValue) print(EnumValue.b(5).hashValue) print(EnumValue2.a(5).hashValue) print(EnumValue2.b(5).hashValue)

Version:

swift-5.1.3-RELEASE

Output:

-5563881854129666050 -5563881854129666050 -5563881854129666050 1174769019477244301 8537611810857838151 -5563881854129666050 -5563881854129666050

Error:

@swiftbot

enum EnumValue: Hashable { case a(Int) case b(Int) } enum EnumValue2: Hashable { case a(Int) case b(Int) func hash(into hasher: inout Hasher) { switch self { case .a(let v): hasher.combine(0) hasher.combine(v) case .b(let v): hasher.combine(1) hasher.combine(v) } } } print(5.hashValue) print(EnumValue.a(5).hashValue) print(EnumValue.b(5).hashValue) print(EnumValue2.a(5).hashValue) print(EnumValue2.b(5).hashValue)

(edited)

nanasi

enum EnumValue: Hashable { case a(Int) case b(Int) } enum EnumValue2: Hashable { case a(Int) case b(Int) func hash(into hasher: inout Hasher) { switch self { case .a(let v): hasher.combine(0) hasher.combine(v) case .b(let v): hasher.combine(1) hasher.combine(v) } } } print(5.hashValue) print(EnumValue.a(5).hashValue) print(EnumValue.b(5).hashValue) print(EnumValue2.a(5).hashValue) print(EnumValue2.b(5).hashValue)

Version:

swift-5.1.3-RELEASE

Output:

3666440306759404138 7344323318427966468 4893249820943752864 7344323318427966468 4893249820943752864

Error:

Standard Library Preview Packageをインポートできる様にしました。 @swift-5.1.5 @swift-5.2.5 @swift-main

import StandardLibraryPreview var numbers = [10, 12, -5, 14, -3, -9, 15] let negatives = numbers.subranges(where: { $0 < 0 }) print(negatives) numbers.moveSubranges(negatives, to: 0) print(numbers)

https://swift.org/blog/preview-package/

RangeSet(2..<3, 4..<6) [-5, -3, -9, 10, 12, 14, 15]

おお〜

https://swift.org/blog/argument-parser/ Swift Argument Parserをインポートできるようにしました。 @swift-main @swift-5.2.5 - --help

import ArgumentParser struct Repeat: ParsableCommand { @Flag(help: "Include a counter with each repetition.") var includeCounter: Bool @Option(name: .shortAndLong, help: "The number of times to repeat 'phrase'.") var count: Int? @Argument(help: "The phrase to repeat.") var phrase: String } extension Repeat { func run() throws { let repeatCount = count ?? .max for i in 1...repeatCount { if includeCounter { print("\(i): \(phrase)") } else { print(phrase) } } } } Repeat.main()

(edited)

USAGE: repeat [--include-counter] [--count <count>] <phrase> ARGUMENTS: <phrase> The phrase to repeat. OPTIONS: --include-counter Include a counter with each repetition. -c, --count <count> The number of times to repeat 'phrase'. -h, --help Show help information.

(edited)

USAGE: repeat [--include-counter] [--count <count>] <phrase> ARGUMENTS: <phrase> The phrase to repeat. OPTIONS: --include-counter Include a counter with each repetition. -c, --count <count> The number of times to repeat 'phrase'. -h, --help Show help information.

(edited)

StandardLibraryPreviewと同時にビルドするには下記エラー回避にSE-0226が必要なため、Swift 5.2以降です。 error: multiple targets named 'TestHelpers' in: swift-argument-parser, swift-se0270-range-set (edited)

@swift-main func f1(apple: Int..., banana: Int) {} f1(apple: 1, 2, banano: 2)

exit status: 134 with stderr:

swift: /home/buildnode/jenkins/workspace/oss-swift-package-linux-ubuntu-16_04/swift/lib/Sema/CSSimplify.cpp:704: bool swift::constraints::matchCallArguments(SmallVectorImpl<AnyFunctionType::Param> &, ArrayRef<AnyFunctionType::Param>, const swift::ParameterListInfo &, bool, bool, swift::constraints::MatchCallArgumentListener &, SmallVectorImpl<ParamBinding> &): Assertion `args[fromArgIdx].getLabel().empty()' failed. Stack dump: 0. Program arguments: /usr/bin/swift -frontend -interpret - -disable-objc-interop -I /Libraries/.build/x86_64-unknown-linux-gnu/debug -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOHTTPParser/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOSHA1/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOAtomics/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIODarwin/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOLinux/include -module-cache-path /Libraries/.build/x86_64-unknown-linux-gnu/debug/ModuleCache -D DEBUG -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOHTTPParser.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOSHA1.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOAtomics.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIODarwin.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOLinux.build/module.modulemap -module-name main -lLibraries 1. Swift version 5.2-dev (LLV

stderr.txt

https://file.io/IX4tcR

倒した

おお〜、おもしろい不具合だ

Xcode11.3とXcode11.4 beta1 , beta3 だと大丈夫だったので割と新しいバグっぽい。 (edited)

@swift-main func f(aa: Int, bb: Int, cc: Int = 0) {} f(bbx: 0) (edited)

exit status: 1 with stderr:

<stdin>:3:2: error: incorrect argument labels in call (have 'bbx:', expected 'aa:bb:cc:') f(bbx: 0) ^~~~ aa <stdin>:3:3: error: missing argument for parameter 'aa' in call f(bbx: 0) ^ aa: <#Int#>, <stdin>:1:6: note: 'f(aa:bb:cc:)' declared here func f(aa: Int, bb: Int, cc: Int = 0) {} ^

(edited)

@swift-main -frontend -typecheck func f() {}

no output

@swift-main -frontend -typecheck -debug-constraints func f(){} f()

stderr:

---Constraint solving at [<stdin>:2:1 - line:2:3]--- (overload set choice binding $T0 := () -> ()) ---Initial constraints for the given expression--- (call_expr type='()' location=<stdin>:2:1 range=[<stdin>:2:1 - line:2:3] arg_labels= (declref_expr type='() -> ()' location=<stdin>:2:1 range=[<stdin>:2:1 - line:2:1] decl=main.(file).f()@<stdin>:1:6 function_ref=single) (tuple_expr type='()' location=<stdin>:2:2 range=[<stdin>:2:2 - line:2:3])) Score: 0 0 0 0 0 0 0 0 0 0 0 0 Contextual Type: <null> Type Variables: $T0 [lvalue allowed] [noescape allowed] as () -> () @ locator@0x8d2bf90 [DeclRef@<stdin>:2:1] $T1 [noescape allowed] as () @ locator@0x8d2bff8 [Call@<stdin>:2:1 -> function result] Active Constraints: Inactive Constraints: Resolved overloads: selected overload set choice f: $T0 == () -> () (found solution 0 0 0 0 0 0 0 0 0 0 0 0) ---Solver statistics--- Total number of scopes explored: 1 Maximum depth reached while exploring solutions: 1 Time: 4.000000e+00ms ---Solution--- Fixed score: 0 0 0 0 0 0 0 0 0 0 0 0 Type variables: $T1 as () @ locator@0x8d2bff8 [Call@<stdin>:2:1 -> function result] $T0 as () -> () @ locator@0x8d2bf90 [DeclRef@<stdin>:2:1] Overload choices: locator@0x8d2bf90 [DeclRef@<stdin>:2:1] with main.(file).f()@<stdin>:1:6 as f: () -> () Constraint restrictions: Disjunction choices: ---Type-checked expression--- (call_expr type='()' location=<stdin>:2:1 range=[<stdin>:2:1 - line:2:3] arg_labels= (declref_expr type='() -> ()' location=<stdin>:2:1 range=[<stdin>:2:1 - line:2:1] decl=main.(file).f()@<stdin>:1:6 function_ref=single) (tuple_expr type='()' location=<stdin>:2:2 range=[<stdin>:2:2 - line:2:3]))

@swift-main -frontend -typecheck func f(aa: Int..., bb: Int, cc: Int) {} f(aa: 1, 2, 3, bbx: 4, cc: 5) (edited)

exit status: 1 with stderr:

<stdin>:2:2: error: incorrect argument label in call (have 'aa:_:_:bbx:cc:', expected 'aa:_:_:bb:cc:') f(aa: 1, 2, 3, bbx: 4, cc: 5) ^ ~~~ bb

(edited)

@swift-main -frontend -typecheck -debug-constraints func f(aa: Int, bb: Int) {} f(aa: 1, aa: 2) (edited)

exit status: 1 with stderr:

---Constraint solving at [<stdin>:2:1 - line:2:15]--- (overload set choice binding $T0 := (Int, Int) -> ()) (attempting fix [fix: re-label argument(s)] @ locator@0x95ce7c0 [Call@<stdin>:2:1 -> apply argument]) (increasing score due to attempting to fix the source) ---Initial constraints for the given expression--- (call_expr type='()' location=<stdin>:2:1 range=[<stdin>:2:1 - line:2:15] arg_labels=aa:aa: (declref_expr type='(Int, Int) -> ()' location=<stdin>:2:1 range=[<stdin>:2:1 - line:2:1] decl=main.(file).f(aa:bb:)@<stdin>:1:6 function_ref=single) (tuple_expr type='(aa: $T1, aa: $T2)' location=<stdin>:2:2 range=[<stdin>:2:2 - line:2:15] names=aa,aa (integer_literal_expr type='$T1' location=<stdin>:2:7 range=[<stdin>:2:7 - line:2:7] value=1 builtin_initializer=**NULL** initializer=**NULL**) (integer_literal_expr type='$T2' location=<stdin>:2:14 range=[<stdin>:2:14 - line:2:14] value=2 builtin_initializer=**NULL** initializer=**NULL**))) Score: 2 0 0 0 0 0 0 0 0 0 0 0 Contextual Type: <null> Type Variables: $T0 [lvalue allowed] [noescape allowed] as (Int, Int) -> () @ locator@0x95ce4e0 [DeclRef@<stdin>:2:1] $T1 [noescape allowed] literal=3 bindings={(subtypes of) (default from ExpressibleByIntegerLiteral) Int} @ locator@0x95ce530 [IntegerLiteral@<stdin>:2:7] $T2 [noescape allowed] literal=3 bindings={(subtypes of) (default from ExpressibleByIntegerLiteral) Int} @ locator@0x95ce5e8 [IntegerLiteral@<stdin>:2:14] $T3 [noescape allowed] as () @ locator@0x95ce6f8 [Call@<stdin>:2:1 -> function result] Active Constraints: Inactive Constraints: $T1 literal conforms to ExpressibleByIntegerLiteral [[locator@0x95ce530 [IntegerLiteral@<stdin>:2:7]]]; $T2 literal conforms to ExpressibleByIntegerLiteral [[locator@0x95ce5e8 [IntegerLiteral@<stdin>:2:14]]]; $T1 arg conv Int [[locator@0x95ce818 [Call@<stdin>:2:1 -> apply argument -> comparing call argument #0 to parameter #0]]]; $T2 arg conv Int [[locator@0x95ce8a8

(edited)

stderr.txt

https://file.io/1kD7X3

@swift-main -frontend -typecheck -enable-educational-notes -diagnostic-documentation-path /home/buildnode/jenkins/workspace/oss-swift-package-linux-ubuntu-16_04/swift/userdocs/diagnostics protocol P { associatedtype T } func f(p: P) {}

exit status: 1 with stderr:

<stdin>:2:11: error: protocol 'P' can only be used as a generic constraint because it has Self or associated type requirements func f(p: P) {} ^

@norio_nomura botってswiftのソースコード持ってますか？バイナリしか持ってない？

ソースコードは持っていません。

11:09 AM

https://hub.docker.com/r/norionomura/swift にボットと必要なライブラリを加えたDockerイメージで動いてます。

なるほど。 ↑の-diagnostics-documentation-pathにswiftリポジトリの/userdocs/diagnostics　を指定すると使える新機能があるので参照したかった。

ふむ。ソースコード全体を持つのは容量的にちょっと厳しいかな。

ああ、容量の負担があるのかあ。

11:14 AM

そのうち /share　とかにデプロイされるようになるといいな。

11:15 AM

swift_install_in_component(DIRECTORY diagnostics DESTINATION "share/doc/swift" COMPONENT compiler)

11:15 AM

いやなんかかいてあるな

11:17 AM

@swift-main -frontend -typecheck -enable-educational-notes -diagnostic-documentation-path /usr/share/doc/swift/diagnostics extension (Int, Int) {} (edited)

exit status: 1 with stderr:

<stdin>:1:1: error: non-nominal type '(Int, Int)' cannot be extended extension (Int, Int) {} ^ ~~~~~~~~~~ Nominal types -------------- In Swift, a type is considered a nominal type if it is named. In other words, it has been defined by declaring the type somewhere in code. Examples of nominal types include classes, structs and enums, all of which must be declared before using them. Nominal types are an important concept in Swift because they can be extended, explicitly initialized using the 'MyType()' syntax, and may conform to protocols. In contrast, non-nominal types have none of these capabilities. A non-nominal type is any type which is not nominal. They are sometimes called “structural types” because they are usually obtained by composing other types. Examples include function types like '(Int) -> (String)', tuple types like '(Int, String)', metatypes like 'Int.Type', and special types like 'Any' and 'AnyObject'. Whether the name of a protocol refers to a nominal or non-nominal type depends on where it appears in code. When used in a declaration or extension like 'extension MyProtocol { … }', 'MyProtocol' refers to a protocol type, which is nominal. This means that it may be extended and conform to protocols. However, when written as the type of a constant or variable, 'MyProtocol' instead refers to a non-nominal, existential type. As a result, code like 'let value: MyProtocol = MyProtocol()' is not allowed because 'MyProtocol' refers to a non-nominal type in this context and cannot be explicitly initialized.

(edited)

swift-5.2とswift-nightlyには /usr/share/doc/swift/diagnostics 入ってる。

1

出た〜

$ docker-swiftnightly-run ls -la /usr/share/doc/swift/diagnostics total 28 drwxr-xr-x 2 root root 4096 Mar 14 05:33 . drwxr-xr-x 3 root root 4096 Mar 14 05:33 .. -rw-r--r-- 1 root root 1898 Mar 14 04:05 associated-type-requirements.md -rw-r--r-- 1 root root 1162 Mar 14 04:05 complex-closure-inference.md -rw-r--r-- 1 root root 1501 Mar 14 04:05 dynamic-callable-requirements.md -rw-r--r-- 1 root root 1431 Mar 14 04:05 nominal-types.md -rw-r--r-- 1 root root 727 Mar 14 04:05 property-wrapper-requirements.md $ docker-swift52-run ls -la /usr/share/doc/swift/diagnostics total 16 drwxr-xr-x 2 root root 4096 Mar 15 09:30 . drwxr-xr-x 3 root root 4096 Mar 15 09:30 .. -rw-r--r-- 1 root root 1162 Mar 15 07:57 complex-closure-inference.md -rw-r--r-- 1 root root 1440 Mar 15 07:57 nominal-types.md

@swift-main -frontend -typecheck -enable-experimental-diagnostic-formatting extension (Int, Int) {}

exit status: 1 with stderr:<stdin>:1:1 1 | extension (Int, Int) {} | ~~~~~~~~~~ | ^ error: non-nominal type '(Int, Int)' cannot be extended 2 |

あとこれも。

へー

あと、GSoC2020で、エラーメッセージの国際化ってテーマも出てました。

11:21 AM

エラーメッセージ系を強化したいっぽい。

macOS版にも入ってるね。

macOS版って？

OSSツールチェイン

あなるほど

$ la (dirname (xcrun --toolchain org.swift.52202003141a -find swift))/../share/doc/swift/diagnostics total 16 drwxr-xr-x 4 norio staff 128B 3 15 11:16 ./ drwxr-xr-x 3 norio staff 96B 3 15 11:16 ../ -rw-r--r-- 1 norio staff 1.1K 3 15 07:56 complex-closure-inference.md -rw-r--r-- 1 norio staff 1.4K 3 15 07:56 nominal-types.md

[omochi@omochi-iMacPro diagnostics]$ pwd /Applications/Xcode11.4.beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/share/doc/swift/diagnostics [omochi@omochi-iMacPro diagnostics]$ ls complex-closure-inference.md nominal-types.md

11:27 AM

Xcode11.4 beta 3 にも同梱されてた。

@swift-main -frontend -typecheck -enable-educational-notes -diagnostic-documentation-path /usr/share/doc/swift/diagnostics protocol P { associatedtype T } func f(p: P) {}

exit status: 1 with stderr:

<stdin>:2:11: error: protocol 'P' can only be used as a generic constraint because it has Self or associated type requirements func f(p: P) {} ^ Using Protocols with 'Self' or Associated Type Requirements Protocols in Swift may be used as types, as part of a generic constraint, or as part of an opaque result type. // CustomStringConvertible can be used as a type. func foo(bar: CustomStringConvertible) { /* ... */ } // ...or as a generic constraint on 'T'. func bar<T: CustomStringConvertible>(baz: T) { /* ... */ } // ...or as part of an opaque result type. func baz() -> some CustomStringConvertible { /* ... */ } While all Swift protocols can be used as generic constraints and as part of opaque result types, not all protocols can be used as types in general. Specifically, if a protocol has a requirement which references 'Self' or an associated type, it cannot be used as a type. One such protocol is 'Identifiable', which has the requirement 'var id: ID { get }', where 'ID' is an associated type. As a result, the following code is not allowed: func foo(bar: Identifiable) { /* ... */ } // error: protocol 'Identifiable' can only be used as a generic constraint because it has Self or associated type requirements Protocols like 'Identifiable' which have 'Self' or associated type requirements cannot be used as types because such types would rarely be useful in practice. They would be unable to allow use of 'Self' or associated type requirements like 'var id: ID { get }' because the associated type is not specified. When working with protocols having 'Self' or associated type requirements constrained generics, opaque result types, or manual type erasure is sufficient to support most use cases. To learn more, see the [Protocols](https://docs.swift.org/swift-book/LanguageGuide/Protocols.html), [Generics](https://docs.swift.org/swift-book/LanguageGuide/Generics.html), and [Opaque Types](https://docs.swif

stderr.txt

https://file.io/paDDGb

markdownのコードブロックを認識してインデントしてる。

11:38 AM

リンク部分はそのままだ。まあリンク作れんしなあ。

Xcode projectのOTHER_SWIFT_FLAGSに

-Xfrontend -enable-educational-notes -Xfrontend -diagnostic-documentation-path -Xfrontend $TOOLCHAIN_DIR/usr/share/doc/swift/diagnostics

って設定してエラーを出させてみたけど、Xcodeのエラーログではmarkdown syntax認識されなかった。

IDE連携モードの時は生のマークダウンが渡ってて、将来的にはXcode側でレンダリングするのかな。 Xcodeからならリンク部分もクリックできるようになりそう。

12:50 PM

結構良さそうな機能だな。PATとかみんなハマるし。

全ボットダウン中…

あらら

このDiscordサーバーが新しいFeatureをサポートするようになり、ボットで使ってるDiscordライブラリSwordがそのFeatureを認識出来なくてクラッシュしてた。

12:00 PM

新しいFeatureはANIMATED_ICON guild has access to set an animated guild iconだったかな。

もしかしてさっき @tarunon がboost課金したからか？

お。。

12:01 PM

それっぽいですね

12:01 PM

AnimatedIconか。申し訳ない

まあ、Swordが悪い。

とりあえず1週間僕のboostきかなくなるんですが

12:02 PM

対応まで外しておきます

Swordが悪いと知ってて、それを古いままパッチ当てて使ってる僕が悪い。

12:02 PM

5.0以降のボットは対応しました。 (edited)

全完了したら戻すのでお知らせくださいまし (edited)

古いボットもdeploy待ちなだけなので、戻していただいて構いません。

お

12:03 PM

ではそのままで。

1

@swift-4.0.3 @swift-4.1.3 @swift-4.2.4 @swift-5.0.3 @swift-5.1.5 @swift-5.2.5 @swift-main -version

Swift version 5.3-dev (LLVM fa328efd5a, Swift 667bec0f21) Target: x86_64-unknown-linux-gnu

Swift version 5.0.3 (swift-5.0.3-RELEASE) Target: x86_64-unknown-linux-gnu

Swift version 4.2.4 (swift-4.2.4-RELEASE) Target: x86_64-unknown-linux-gnu

Swift version 5.1.5 (swift-5.1.5-RELEASE) Target: x86_64-unknown-linux-gnu

Swift version 4.1.3 (swift-4.1.3-RELEASE) Target: x86_64-unknown-linux-gnu

Swift version 4.0.3 (swift-4.0.3-RELEASE) Target: x86_64-unknown-linux-gnu

Swift version 5.2-dev (Swift 33150e32b4) Target: x86_64-unknown-linux-gnu

復帰した。

3

@swift-5.2.5 class Foo: Foo.Base { class Base {} }

exit status: 1 with stderr:

<stdin>:1:7: error: circular reference class Foo: Foo.Base { ^ <stdin>:1:16: note: through reference here class Foo: Foo.Base { ^

@swift-5.1.5 class Foo: Foo.Base { class Base {} }

no output

@swift-5.2.5 struct S { let a: Int = 1 } S(a: 2)

exit status: 1 with stderr:<stdin>:2:6: error: argument passed to call that takes no arguments S(a: 2) ^

@swift-5.2.5 -O

class Foo { private let deinitBody: () -> Void init(_ deinitBody: @escaping () -> Void) { self.deinitBody = deinitBody } deinit { deinitBody() } } func main() { var a = 42 var foo = Foo {} foo = Foo { a = -1 } let _ = foo // to ignore warnings print(a) } main()

(edited)

-1 (edited)

@swift-5.3.3 -version

Swift version 5.3-dev (LLVM 38f04f051e, Swift 587da7ce60) Target: x86_64-unknown-linux-gnu

@swift-5.2.5 @swift-5.3.3

class Record { var storage: [String: Any] init(_ storage: [String: Any]) { self.storage = storage } } extension Record { @propertyWrapper public struct Field<Value> { @available(*, unavailable) public var wrappedValue: Value { fatalError("only works on instance properties of classes") } private let key: String public init(key: String) { self.key = key } public static subscript<Instance: Record>( _enclosingInstance instance: Instance, wrapped wrappedKeyPath: KeyPath<Instance, Value>, storage storageKeyPath: ReferenceWritableKeyPath<Instance, Self> ) -> Value { let field = instance[keyPath: storageKeyPath] return instance.storage[field.key] as! Value } } } class User: Record { @Field(key: "id") var id: Int } let user = User(["id": 100]) print(user.id)

(edited)

100 (edited)

@swift-5.3.3

class Record { var storage: [String: Any] init(_ storage: [String: Any]) { self.storage = storage } } extension Record { @propertyWrapper public struct Field<Value> { @available(*, unavailable) public var wrappedValue: Value { get { fatalError("only works on instance properties of classes") } set { fatalError("only works on instance properties of classes") } } private let key: String public init(key: String) { self.key = key } public static subscript<Instance: Record>( _enclosingInstance instance: Instance, wrapped wrappedKeyPath: ReferenceWritableKeyPath<Instance, Value>, storage storageKeyPath: ReferenceWritableKeyPath<Instance, Self> ) -> Value { get { let field = instance[keyPath: storageKeyPath] return instance.storage[field.key] as! Value } set {} } } } class User: Record { @Field(key: "id") var id: Int } let user = User(["id": 100]) print(user.id)

(edited)

100 (edited)

@swift-5.3.3

class Base { class var keyPath: AnyKeyPath { fatalError() } } final class Derived: Base { override class var keyPath: AnyKeyPath { \Self.value } var value: Int = 0 } print(Derived.keyPath)

exit status: 4 with stderr:

Fatal error: could not demangle keypath type from '�: file /home/buildnode/jenkins/workspace/oss-swift-5.3-package-linux-ubuntu-16_04/swift/stdlib/public/core/KeyPath.swift, line 2623 Current stack trace: 0 libswiftCore.so 0x00007fa81bf3dc30 swift_reportError + 50 1 libswiftCore.so 0x00007fa81bfb01a0 _swift_stdlib_reportFatalErrorInFile + 115 2 libswiftCore.so 0x00007fa81bc7b465 <unavailable> + 1410149 3 libswiftCore.so 0x00007fa81bc7b0a7 <unavailable> + 1409191 4 libswiftCore.so 0x00007fa81bc7b642 <unavailable> + 1410626 5 libswiftCore.so 0x00007fa81bc79a70 _assertionFailure(_:_:file:line:flags:) + 523 6 libswiftCore.so 0x00007fa81bd55451 <unavailable> + 2303057 7 libswiftCore.so 0x00007fa81bd556ae <unavailable> + 2303662 8 libswiftCore.so 0x00007fa81bd54c97 <unavailable> + 2301079 9 libswiftCore.so 0x00007fa81bd54990 _swift_getKeyPath(pattern:arguments:) + 120 12 swift 0x0000000000599cdc <unavailable> + 1678556 13 swift 0x000000000058723f <unavailable> + 1602111 14 swift 0x000000000056c471 <unavailable> + 1492081 15 swift 0x000000000055fa38 <unavailable> + 1440312 16 swift 0x000000000055c87e <unavailable> + 1427582 17 swift 0x00000000004d653b <unavailable> + 877883 18 libc.so.6 0x00007fa81e044740 __libc_start_main + 240 19 swift 0x00000000004d5fe9 <unavailable> + 876521 Stack dump: 0. Program arguments: /usr/bin/swift -frontend -interpret - -disable-objc-interop -I /Libraries/.build/x86_64-unknown-linux-gnu/debug -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftB

stderr.txt

https://file.io/eS5e3Un0

@swift-5.1.5 @swift-5.2.5 func foo(_ closure: () -> Void, defaultArg: Int = 0) { closure() } foo { print("foo") }

exit status: 1 with stderr:

<stdin>:5:4: error: missing argument for parameter #1 in call foo { print("foo") } ^ (<#() -> Void#>) <stdin>:1:6: note: 'foo(_:defaultArg:)' declared here func foo(_ closure: () -> Void, defaultArg: Int = 0) { ^

foo

やはりSwift 5.2から最後の引数がデフォルト引数の時に、その1つ前のクロージャがtrailing closureとして呼べるようになっている

SE-0279の下準備がされていた？

0279の前からmasterでは入ってたよ (edited)

なるほどー。いつくらいの変更なんだろう。

11:44 PM

https://github.com/Quick/Nimble/issues/755 これで動き見てて気付きました

containElementSatisfying dispatch incorrect on CI · Issue #755 · Qu...

I have read CONTRIBUTING and have done my best to follow them. What did you do? Using containElementSatisfying in swift test using XCTest (not QuickSpec). Tests compile and run in Xcode 11.4 on my ...

クロージャの部分がautoclosureなケースであてはまったのか

2:05 AM

https://github.com/apple/swift/commit/88c477b08d697a3c03ff2ec0bcad64391e2ad031

[ConstraintSystem] Accept trailing closure if the last parameter is...

…efaulted If the last parameter is defaulted, there might be an attempt to use a trailing closure with previous parameter that accepts a function type e.g. ```swift func foo(_: () -> Int, ...

2:06 AM

いつくらいの変更なんだろう。

2019/11/2のコミット。半年前ですね。

結構前だった

これデフォルト引数が一個の場合だけしかできなくて

おー、ありがとうございます！

２個や３個でも同じ挙動になるべきだろうと思って

2:08 AM

https://github.com/apple/swift/pull/29845

[ConstraintSystem] Accept trailing closure if multiple defaulted pa...

This patch improve trailing closure matching with parameters. Currently, trailing closure can match with function parameter followed by one defaulted parameter. But it can not do if: function type...

2:08 AM

PRを出したらマージされたんだけど、そのあといろいろあってrevertされた。

なるほど https://bugs.swift.org/browse/SR-12291 これ、Nimbleのビルドがエラーになったやつだ。 https://github.com/Quick/Nimble/issues/733

Doesn't build with the latest Swift Development Snapshot (DEVELOPME...

https://travis-ci.org/github/Quick/Nimble/jobs/669964944 /home/travis/build/Quick/Nimble/Tests/NimbleTests/Matchers/PostNotificationTest.swift:17:9: error: ambiguous use of 'expect'...

これさ〜

2:11 AM

２このケースでリグレッションになるなら

2:11 AM

同じ理屈で１このケースでもリグレッションがあったはずだと思うんだけど

この件があったからsource-compat-suiteにNimble追加してくれたのか https://github.com/apple/swift-source-compat-suite/pull/418

Add Nimble to the test suite by compnerd · Pull Request #418 · appl...

The overload resolution broke recently on master (SR-12291). Add this to the test suite for future testing. Pull Request Description Replace with a description of this pull request. Instructions f...

そんな因果がｗ

2:14 AM

じゃあ俺がPR29845をやったことでNimbleがそこに入ったって事だｗ

1

色々話が繋がって面白い、助かりました

1

@swift-5.3.3 protocol Dekiru { static var hoge: Dekiruzo { get } } enum Dekiruzo: Dekiru { case hoge } (edited)

no output (edited)

@swift-5.3.3 protocol P { associatedtype T static var hoge: Types<T> { get } } enum Types<T>: P { case hoge }

no output

@swift-5.3.3 protocol P { static var hoge: Types<Int> { get } } enum Types<T>: P { case hoge }

exit status: 1 with stderr:

<stdin>:5:6: error: type 'Types<T>' does not conform to protocol 'P' enum Types<T>: P { ^ <stdin>:6:10: note: candidate has non-matching type '<T> (Types<T>.Type) -> Types<T>' case hoge ^ <stdin>:2:16: note: protocol requires property 'hoge' with type 'Types<Int>'; do you want to add a stub? static var hoge: Types<Int> { get } ^

@swift-5.3.3

protocol P { static var hoge: Types<Int> { get } } enum Types<T> { case hoge } extension Types: P where T == Int {} func use<T>(_ type: Types<T>) { print("1", type) } use(.hoge)

(edited)

exit status: 1 with stderr:

<stdin>:15:1: error: generic parameter 'T' could not be inferred use(.hoge) ^ <stdin>:11:6: note: in call to function 'use' func use<T>(_ type: Types<T>) { ^

(edited)

@swift-5.3.3

protocol EntityProtocol { associatedtype ID init(id: ID) } class Entity<ID>: EntityProtocol { let id: ID required init(id: ID) { self.id = id } enum CodingKeys: CodingKey { case id(String) var stringValue: String { switch self { case .id(let id): return id } } var intValue: Int? { nil } init?(stringValue: String) { self = .id(stringValue) } init?(intValue: Int) { return nil } } class func codingKeysForID() -> CodingKeys { .id("id") } } extension EntityProtocol where Self: Decodable, ID: Decodable { init(from decoder: Decoder) throws { let type = Self.self as! Entity<ID>.Type let c = try decoder.container(keyedBy: type.CodingKeys.self) self.init(id: try c.decode(ID.self, forKey: type.codingKeysForID())) } }

(edited)

no output

@swift-5.3.3

struct MySet<Element: Hashable> { private var set: Set<Element> } extension MySet: Collection { subscript(idx: Set<Element>.Index) -> Element { set[idx] } var startIndex: Set<Element>.Index { set.startIndex } var endIndex: Set<Element>.Index { set.endIndex } func index(after i: Set<Element>.Index) -> Set<Element>.Index { set.index(after: i) } }

(edited)

exit status: 1 with stderr:

<stdin>:6:56: error: expected '{' to start setter definition subscript(idx: Set<Element>.Index) -> Element { set[idx] } ^ <stdin>:7:45: error: expected '{' to start setter definition var startIndex: Set<Element>.Index { set.startIndex } ^ <stdin>:8:43: error: expected '{' to start setter definition var endIndex: Set<Element>.Index { set.endIndex } ^

(edited)

@swift-5.3.3

struct MySet<Element: Hashable> { private var _set: Set<Element> } extension MySet: Collection { subscript(idx: Set<Element>.Index) -> Element { _set[idx] } var startIndex: Set<Element>.Index { _set.startIndex } var endIndex: Set<Element>.Index { _set.endIndex } func index(after i: Set<Element>.Index) -> Set<Element>.Index { _set.index(after: i) } }

no output

@swift-5.2.5

import Foundation protocol Foo: NSObjectProtocol { func a() } class Bar: NSObject, Foo { func a() { } } print(class_getInstanceMethod(Bar.self, Selector("a")))

exit status: 1 with stderr:

<stdin>:13:7: error: use of unresolved identifier 'class_getInstanceMethod' print(class_getInstanceMethod(Bar.self, Selector("a"))) ^~~~~~~~~~~~~~~~~~~~~~~ <stdin>:13:41: error: use of unresolved identifier 'Selector' print(class_getInstanceMethod(Bar.self, Selector("a"))) ^~~~~~~~

無いか…

@swift-5.2.5

class A { class var i: String { "i" } init() {} func setup() { a = { if let a = self.a { return a() } return Self.i } } var a: (() -> String)? } class Test { weak var a: A? init(a: A) { self.a = a a.setup() } func main() { print(a?.a?()) } } Test(a: A()).main()

exit status: 11 with stderr:

<stdin>:21:15: warning: expression implicitly coerced from 'String?' to 'Any' print(a?.a?()) ^~~~~~~ <stdin>:21:19: note: provide a default value to avoid this warning print(a?.a?()) ~~~~^~~ ?? <#default value#> <stdin>:21:19: note: force-unwrap the value to avoid this warning print(a?.a?()) ~~~~^~~ ! <stdin>:21:19: note: explicitly cast to 'Any' with 'as Any' to silence this warning print(a?.a?()) ~~~~^~~ as Any Stack dump: 0. Program arguments: /usr/bin/swift -frontend -interpret - -disable-objc-interop -I /Libraries/.build/x86_64-unknown-linux-gnu/debug -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOHTTPParser/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOSHA1/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOAtomics/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIODarwin/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOLinux/include -module-cache-path /Libraries/.build/x86_64-unknown-linux-gnu/debug/ModuleCache -D DEBUG -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOHTTPParser.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOSHA1.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOAtomics.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIODarwin.build/module.modulemap -Xcc -fmodule-m

stderr.txt

https://file.io/ZRTTtWdJEFPb

@swift-5.3.3

class A { class var i: String { "i" } init() {} func setup() { a = { if let a = self.a { return a() } return Self.i } } var a: (() -> String)? } class Test { weak var a: A? init(a: A) { self.a = a a.setup() } func main() { print(a?.a?()) } } Test(a: A()).main()

exit status: 11 with stderr:

<stdin>:21:15: warning: expression implicitly coerced from 'String?' to 'Any' print(a?.a?()) ^~~~~~~ <stdin>:21:19: note: provide a default value to avoid this warning print(a?.a?()) ~~~~^~~ ?? <#default value#> <stdin>:21:19: note: force-unwrap the value to avoid this warning print(a?.a?()) ~~~~^~~ ! <stdin>:21:19: note: explicitly cast to 'Any' with 'as Any' to silence this warning print(a?.a?()) ~~~~^~~ as Any Stack dump: 0. Program arguments: /usr/bin/swift -frontend -interpret - -disable-objc-interop -I /Libraries/.build/x86_64-unknown-linux-gnu/debug -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOHTTPParser/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOSHA1/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOAtomics/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIODarwin/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOLinux/include -module-cache-path /Libraries/.build/x86_64-unknown-linux-gnu/debug/ModuleCache -D DEBUG -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOHTTPParser.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOSHA1.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOAtomics.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIODarwin.build/module.modulemap -Xcc -fmodule-m

stderr.txt

https://file.io/sG0PlMIJo8ZA

@swift-main

struct NotEquatable {} func test() { struct A: Equatable { var value: NotEquatable static func == (lhs: A, rhs: A) -> Bool { true } } }

exit status: 1 with stderr:

<stdin>:4:12: error: type 'A' does not conform to protocol 'Equatable' struct A: Equatable { ^ <stdin>:5:13: note: stored property type 'NotEquatable' does not conform to protocol 'Equatable', preventing synthesized conformance of 'A' to 'Equatable' var value: NotEquatable ^ Swift.==:1:24: note: candidate would match if 'A' conformed to 'RawRepresentable' @inlinable public func == <T>(lhs: T, rhs: T) -> Bool where T : RawRepresentable, T.RawValue : Equatable ^ Swift.FloatingPoint:2:24: note: candidate would match if 'A' conformed to 'FloatingPoint' public static func == (lhs: Self, rhs: Self) -> Bool ^ Swift.BinaryInteger:2:24: note: candidate would match if 'A' conformed to 'BinaryInteger' public static func == <Other>(lhs: Self, rhs: Other) -> Bool where Other : BinaryInteger ^ Swift._Pointer:2:24: note: candidate would match if 'A' conformed to '_Pointer' public static func == (lhs: Self, rhs: Self) -> Bool ^ Swift.Strideable:3:35: note: candidate would match if 'A' conformed to 'Strideable' @inlinable public static func == (x: Self, y: Self) -> Bool ^ Swift.StringProtocol:2:35: note: candidate would match if 'A' conformed to 'StringProtocol' @inlinable public static func == <RHS>(lhs: Self, rhs: RHS) -> Bool where RHS : StringProtocol ^ Swift.SIMD:4:24: note: candidate would match if 'A' conformed to 'SIMD' public static func == (lhs: Self, rhs: Self) -> Bool ^ Swift.Equatable:2:17: note: protocol requires function '==' with type '(A, A) -> Bool' static func == (lhs: Self, rhs: Self) -> Bool ^

@swift-5.2.5 -emit-ir func contains(i: Int, lim: Int) -> Bool { (0..<lim).contains(i) } contains(1, 100)

exit status: 1 with stderr:<unknown>:0: error: option '-emit-ir' is not supported by 'swift'; did you mean to use 'swiftc'?

-frontendの後に付けると動きます。 @swift-5.2.5 -frontend -emit-ir func contains(_ i: Int, _ lim: Int) -> Bool { (0..<lim).contains(i) } contains(1, 100)

; ModuleID = '-' source_filename = "-" target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" target triple = "x86_64-unknown-linux-gnu" module asm ".section .swift1_autolink_entries,\220x80000000\22" %TSnySiG = type <{ %TSi, %TSi }> %TSi = type <{ i64 }> @0 = private unnamed_addr constant [46 x i8] c"Can't form Range with upperBound < lowerBound\00" @1 = private unnamed_addr constant [112 x i8] c"/home/buildnode/jenkins/workspace/oss-swift-5.2-package-linux-ubuntu-16_04/swift/stdlib/public/core/Range.swift\00" @2 = private unnamed_addr constant [12 x i8] c"Fatal error\00" @__swift_reflection_version = linkonce_odr hidden constant i16 3 @_swift1_autolink_entries = private constant [49 x i8] c"-lswiftSwiftOnoneSupport\00-lswiftCore\00-lLibraries\00", section ".swift1_autolink_entries", align 8 @llvm.used = appending global [2 x i8*] [i8* bitcast (i16* @__swift_reflection_version to i8*), i8* getelementptr inbounds ([49 x i8], [49 x i8]* @_swift1_autolink_entries, i32 0, i32 0)], section "llvm.metadata", align 8 define protected i32 @main(i32, i8**) #0 { entry: %2 = bitcast i8** %1 to i8* %3 = call swiftcc i1 @"$s4main8containsySbSi_SitF"(i64 1, i64 100) ret i32 0 } define hidden swiftcc i1 @"$s4main8containsySbSi_SitF"(i64, i64) #0 { entry: %i.debug = alloca i64, align 8 %2 = bitcast i64* %i.debug to i8* call void @llvm.memset.p0i8.i64(i8* align 8 %2, i8 0, i64 8, i1 false) %lim.debug = alloca i64, align 8 %3 = bitcast i64* %lim.debug to i8* call void @llvm.memset.p0i8.i64(i8* align 8 %3, i8 0, i64 8, i1 false) %4 = alloca %TSnySiG, align 8 %5 = alloca %TSi, align 8 %6 = alloca %TSi, align 8 %7 = alloca %TSnySiG, align 8 %8 = alloca %TSi, align 8 store i64 %0, i64* %i.debug, align 8 store i64 %1, i64* %lim.debug, align 8 %9 = bitcast %TSnySiG* %4 to i8* call void @llvm.lifetime.start.p0i8(i64 16, i8* %9) br label %10 10: ; preds = %entry %11 = icmp slt i64 %1, 0

stdout.txt

https://file.io/35e17maZbKDm

stderr.txt

https://file.io/JIQDZOnk8dMJ

1

@swift-5.2.5 -version

Swift version 5.2.4-dev (Swift b623e823d4) Target: x86_64-unknown-linux-gnu

あーこれswift-5.2.5-RELEASEタグが付いたけど、やり直しになるパターンだ…

どういうことです？

swift -versionが5.2.4-devを返して来る。

swift-5.2.5-RELEASEタグを付ける時にバージョン定義を5.2.5に変更するのを忘れてたのか。

バージョンの横に表示されてるb623e823d4ってコミットのハッシュではないのかな？

え、そうだと思ってた

6:44 AM

Version.cpp のコミットハッシュとか。

これ？ https://github.com/apple/swift/commit/b623e823d42841ab8b151fb9c092bb0f9f5084e6

Bump the Swift version to 5.2.4 · apple/swift@b623e82

あ、ほんとだ、これがそのハッシュですね

6:48 AM

https://github.com/apple/swift/blob/master/lib/Basic/Version.cpp

apple/swift

The Swift Programming Language. Contribute to apple/swift development by creating an account on GitHub.

6:48 AM

↑こっちかと思ってたけど、こっちは #define を参照してるだけだから、

6:48 AM

Version.cpp自体は変化しなかったか。

6:49 AM

#define の値をセットしてるのはそのCMakeList.txtですね。

ci.swift.orgのログを見ると、直前までそのハッシュでテストビルドしてたみたいだから、正式リリースバイナリとは違いそう。 https://ci.swift.org/view/Packages/job/oss-swift-5.2-package-linux-ubuntu-16_04/

6:51 AM

なんども付け替えてるんですかね？

ボットの更新はgithubにタグがついて、タグから予想される予定地にファイルが現れたらリリースとみなしてる。

6:53 AM

forums.swift.orgでアナウンスされない限り、正式リリースでは無いと考えておくべきかな。

なるほど。

6:54 AM

swift-5.2.5-RELEASEをプレイしているつもり。

なるほどｗ

@swift-5.2.5 -version

Swift version 5.2.5 (swift-5.2.5-RELEASE) Target: x86_64-unknown-linux-gnu

@swift-main -Xfrontend -enable-experimental-concurrency func asyncFunc() async { print(#function) } await asyncFunc()

1

asyncFunc()

@swift-4.0.3 protocol P {} struct S<T: P> {} func fun<T>(arg: S<T>) {}

no output

@swift-5.2.5 -O

import Foundation protocol P { var prev: P? { get set } } struct Foo: P, CustomStringConvertible { var prev: P? let uuid = UUID() var description: String { "Foo(prev: \(prev.map { String(describing: $0) } ?? "nil"), uuid: \(uuid.uuidString.prefix(4)))" } } func insert(_ p: P, into array: inout [P], _ prev: inout P?) { var p = p p.prev = prev prev = p print("new p =", p) array.append(p) } var p: P? var result: [P] = [] insert(Foo(), into: &result, &p) insert(Foo(), into: &result, &p) insert(Foo(), into: &result, &p) insert(Foo(), into: &result, &p) insert(Foo(), into: &result, &p) insert(Foo(), into: &result, &p) for r in result { print("inserted =", r) } print("last 'p' =", p!)

(edited)

new p = Foo(prev: nil, uuid: 5D6E) new p = Foo(prev: Foo(prev: nil, uuid: 5D6E), uuid: 0264) new p = Foo(prev: Foo(prev: Foo(prev: nil, uuid: 5D6E), uuid: 0264), uuid: B254) new p = Foo(prev: Foo(prev: Foo(prev: Foo(prev: nil, uuid: 5D6E), uuid: 0264), uuid: B254), uuid: 5D51) new p = Foo(prev: Foo(prev: Foo(prev: Foo(prev: Foo(prev: nil, uuid: 5D6E), uuid: 0264), uuid: B254), uuid: 5D51), uuid: 0A52) new p = Foo(prev: Foo(prev: Foo(prev: Foo(prev: Foo(prev: Foo(prev: nil, uuid: 5D6E), uuid: 0264), uuid: B254), uuid: 5D51), uuid: 0A52), uuid: 381A) inserted = Foo(prev: nil, uuid: 5D6E) inserted = Foo(prev: nil, uuid: 0264) inserted = Foo(prev: nil, uuid: B254) inserted = Foo(prev: nil, uuid: 5D51) inserted = Foo(prev: nil, uuid: 0A52) inserted = Foo(prev: nil, uuid: 381A) last 'p' = Foo(prev: Foo(prev: Foo(prev: Foo(prev: Foo(prev: Foo(prev: nil, uuid: 5D6E), uuid: 0264), uuid: B254), uuid: 5D51), uuid: 0A52), uuid: 381A)

(edited)

@swift-5.2.5

import Foundation protocol P { var prev: P? { get set } } struct Foo: P, CustomStringConvertible { var prev: P? let uuid = UUID() var description: String { "Foo(prev: \(prev.map { String(describing: $0) } ?? "nil"), uuid: \(uuid.uuidString.prefix(4)))" } } func insert(_ p: P, into array: inout [P], _ prev: inout P?) { var p = p p.prev = prev prev = p print("new p =", p) array.append(p) } var p: P? var result: [P] = [] insert(Foo(), into: &result, &p) insert(Foo(), into: &result, &p) insert(Foo(), into: &result, &p) insert(Foo(), into: &result, &p) insert(Foo(), into: &result, &p) insert(Foo(), into: &result, &p) for r in result { print("inserted =", r) } print("last 'p' =", p!)

new p = Foo(prev: nil, uuid: 0628) new p = Foo(prev: Foo(prev: nil, uuid: 0628), uuid: A27A) new p = Foo(prev: Foo(prev: Foo(prev: nil, uuid: 0628), uuid: A27A), uuid: 85E7) new p = Foo(prev: Foo(prev: Foo(prev: Foo(prev: nil, uuid: 0628), uuid: A27A), uuid: 85E7), uuid: 12A7) new p = Foo(prev: Foo(prev: Foo(prev: Foo(prev: Foo(prev: nil, uuid: 0628), uuid: A27A), uuid: 85E7), uuid: 12A7), uuid: 7C27) new p = Foo(prev: Foo(prev: Foo(prev: Foo(prev: Foo(prev: Foo(prev: nil, uuid: 0628), uuid: A27A), uuid: 85E7), uuid: 12A7), uuid: 7C27), uuid: 6E9E) inserted = Foo(prev: nil, uuid: 0628) inserted = Foo(prev: Foo(prev: nil, uuid: 0628), uuid: A27A) inserted = Foo(prev: Foo(prev: Foo(prev: nil, uuid: 0628), uuid: A27A), uuid: 85E7) inserted = Foo(prev: Foo(prev: Foo(prev: Foo(prev: nil, uuid: 0628), uuid: A27A), uuid: 85E7), uuid: 12A7) inserted = Foo(prev: Foo(prev: Foo(prev: Foo(prev: Foo(prev: nil, uuid: 0628), uuid: A27A), uuid: 85E7), uuid: 12A7), uuid: 7C27) inserted = Foo(prev: Foo(prev: Foo(prev: Foo(prev: Foo(prev: Foo(prev: nil, uuid: 0628), uuid: A27A), uuid: 85E7), uuid: 12A7), uuid: 7C27), uuid: 6E9E) last 'p' = Foo(prev: Foo(prev: Foo(prev: Foo(prev: Foo(prev: Foo(prev: nil, uuid: 0628), uuid: A27A), uuid: 85E7), uuid: 12A7), uuid: 7C27), uuid: 6E9E)

最適化で結果が変わる

@swift-5.2.5

import Foundation @propertyWrapper struct DefaultValue<Storage: DefaultValueStorage>: Decodable { var wrappedValue: Storage.Value = Storage.value } extension DefaultValue { init(from decoder: Decoder) throws { let container = try decoder.singleValueContainer() self.wrappedValue = try container.decode(Storage.Value.self) } } protocol DefaultValueStorage { associatedtype Value: Decodable static var value: Value { get } } enum DefaultValueStorages { enum Nil<T: Decodable>: DefaultValueStorage { static var value: T? { nil } } } // MARK: - 1. 直接書く struct S1 { @DefaultValue<DefaultValueStorages.Nil<String>> var string } // MARK: - 2. 別enumでtypealiasする enum Default { typealias Nil<T: Decodable> = DefaultValue<DefaultValueStorages.Nil<T>> } struct S2 { @Default.Nil<String> var string } // MARK: - 3. extension DefaultValueでtypealiasする extension DefaultValue { typealias Nil<T: Decodable> = DefaultValue<DefaultValueStorages.Nil<T>> } struct S3 { @DefaultValue.Nil<String> var string }

exit status: 134 with stderr:

<stdin>:27:57: error: type annotation missing in pattern @DefaultValue<DefaultValueStorages.Nil<String>> var string ^ <stdin>:35:30: error: type annotation missing in pattern @Default.Nil<String> var string ^ swift: /home/buildnode/jenkins/workspace/oss-swift-5.2-package-linux-ubuntu-16_04/swift/lib/Sema/TypeCheckType.cpp:865: static swift::Type swift::TypeChecker::applyUnboundGenericArguments(swift::UnboundGenericType *, swift::GenericTypeDecl *, swift::SourceLoc, swift::TypeResolution, ArrayRef<swift::Type>): Assertion `!resultType->hasTypeParameter()' failed. Stack dump: 0. Program arguments: /usr/bin/swift -frontend -interpret - -disable-objc-interop -I /Libraries/.build/x86_64-unknown-linux-gnu/debug -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOHTTPParser/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOSHA1/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOAtomics/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIODarwin/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOLinux/include -module-cache-path /Libraries/.build/x86_64-unknown-linux-gnu/debug/ModuleCache -D DEBUG -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOHTTPParser.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOSHA1.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOAtomics.build/module.modulemap -Xcc -fmodule-map-file=/Libr

stderr.txt

https://file.io/5ZSkFLM6LpUp

@swift-5.3.3

import Foundation @propertyWrapper struct DefaultValue<Storage: DefaultValueStorage>: Decodable { var wrappedValue: Storage.Value = Storage.value } extension DefaultValue { init(from decoder: Decoder) throws { let container = try decoder.singleValueContainer() self.wrappedValue = try container.decode(Storage.Value.self) } } protocol DefaultValueStorage { associatedtype Value: Decodable static var value: Value { get } } enum DefaultValueStorages { enum Nil<T: Decodable>: DefaultValueStorage { static var value: T? { nil } } } // MARK: - 1. 直接書く struct S1 { @DefaultValue<DefaultValueStorages.Nil<String>> var string } // MARK: - 2. 別enumでtypealiasする enum Default { typealias Nil<T: Decodable> = DefaultValue<DefaultValueStorages.Nil<T>> } struct S2 { @Default.Nil<String> var string } // MARK: - 3. extension DefaultValueでtypealiasする extension DefaultValue { typealias Nil<T: Decodable> = DefaultValue<DefaultValueStorages.Nil<T>> } struct S3 { @DefaultValue.Nil<String> var string }

(edited)

exit status: 134 with stderr:

swift: /home/buildnode/jenkins/workspace/oss-swift-5.3-package-linux-ubuntu-16_04/swift/lib/Sema/TypeCheckType.cpp:881: swift::Type swift::TypeChecker::applyUnboundGenericArguments(swift::UnboundGenericType *, swift::GenericTypeDecl *, swift::SourceLoc, swift::TypeResolution, ArrayRef<swift::Type>): Assertion `!resultType->hasTypeParameter()' failed. Stack dump: 0. Program arguments: /usr/bin/swift -frontend -interpret - -disable-objc-interop -I /Libraries/.build/x86_64-unknown-linux-gnu/debug -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOHTTPParser/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOSHA1/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOAtomics/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIODarwin/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOLinux/include -module-cache-path /Libraries/.build/x86_64-unknown-linux-gnu/debug/ModuleCache -D DEBUG -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOHTTPParser.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOSHA1.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOAtomics.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIODarwin.build/module.modulemap -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOLinux.build/module.modulemap -module-name main -lLibraries 1. Swift version 5.3-dev (LLVM b87e6c6a2b, Swift 6446e640ec) 2. While evaluating request TypeCh

(edited)

stderr.txt

https://file.io/cZ1CvpybuxAc

@swift-5.3.3 -version

Swift version 5.3 (swift-5.3-RELEASE) Target: x86_64-unknown-linux-gnu

@swift-5.3.3

struct Container<Value> { var value: Value init(value: Value) { self.value = value } func withValue(action: (Value) -> ()) { action(value) } } var container = Container<Any>(value: "foo") container.withValue { value in print(value) container.value = "bar" print(value) }

exit status: 1 with stderr:

<stdin>:2:9: error: initializers may only be declared within a type init(value: Value) { ^ <stdin>:8:1: error: extraneous '}' at top level } ^ <stdin>:1:16: error: cannot find type 'Value' in scope var value: Value ^~~~~ <stdin>:5:29: error: cannot find type 'Value' in scope func withValue(action: (Value) -> ()) { ^~~~~ <stdin>:10:17: error: cannot find 'Container' in scope var container = Container<Any>(value: "foo") ^~~~~~~~~

@swift-5.3.3

class Container<Value> { var value: Value init(value: Value) { self.value = value } func withValue(action: (Value) -> ()) { action(value) } } let container = Container<Any>(value: "foo") container.withValue { value in print(value) container.value = "bar" print(value) }

(edited)

exit status: 1 with stderr:

<stdin>:2:9: error: initializers may only be declared within a type init(value: Value) { ^ <stdin>:8:1: error: extraneous '}' at top level } ^ <stdin>:1:16: error: cannot find type 'Value' in scope var value: Value ^~~~~ <stdin>:5:29: error: cannot find type 'Value' in scope func withValue(action: (Value) -> ()) { ^~~~~ <stdin>:10:17: error: cannot find 'Container' in scope let container = Container<Any>(value: "foo") ^~~~~~~~~

@swift-5.3.3

struct Container { var value: Any = "foo" func withValue(action: (Any) -> Void) { action(value) } } var container = Container() container.withValue { value in print(value) container.value = "bar" print(value) }

foo foo

@swift-5.3.3 -O

struct Container { var value: Any = "foo" func withValue(action: (Any) -> Void) { action(value) } } var container = Container() container.withValue { value in print(value) container.value = "bar" print(value) }

foo bar

@swift-5.2.5 -O

struct Container { var value: Any = "foo" func withValue(action: (Any) -> Void) { action(value) } } var container = Container() container.withValue { value in print(value) container.value = "bar" print(value) }

(edited)

foo foo (edited)

@swift-5.2.5 -O @swift-5.3.3 -O

var global: Any = 1 func withValue(action: (Any) -> Void) { action(global) } withValue { value in print(value) global = 24 print(value) }

(edited)

1 24 (edited)

1 1 (edited)

@swift-main

import Foundation func download(from url: URL) async throws -> Data { fatalError("Unimplemented yet.") } let url: URL! = nil @asyncHandler func onButtonPressed(_ sender: Any) { do { let data = try await download(from: url) print(data.count) } catch { print("\(error)") } }

exit status: 1 with stderr:

<stdin>:3:29: error: consecutive statements on a line must be separated by ';' func download(from url: URL) async throws -> Data { ^ ; <stdin>:9:2: error: 'asyncHandler' attribute is only valid when experimental concurrency is enabled @asyncHandler ^ <stdin>:12:29: error: consecutive statements on a line must be separated by ';' let data = try await download(from: url) ^ ; <stdin>:3:6: error: expected '{' in body of function declaration func download(from url: URL) async throws -> Data { ^ <stdin>:3:30: error: cannot find 'async' in scope func download(from url: URL) async throws -> Data { ^~~~~ <stdin>:3:30: error: expected type before '->' func download(from url: URL) async throws -> Data { ^ <stdin>:3:46: error: expected type after '->' func download(from url: URL) async throws -> Data { ^ <stdin>:12:24: error: cannot find 'await' in scope let data = try await download(from: url) ^~~~~

async/await なんかフラグがいるんだっけ (edited)

-enable-experimental-concurrency ？

8:49 AM

@swift-main -Xfrontend -enable-experimental-concurrency

import Foundation func download(from url: URL) async throws -> Data { fatalError("Unimplemented yet.") } let url: URL! = nil @asyncHandler func onButtonPressed(_ sender: Any) { do { let data = try await download(from: url) print(data.count) } catch { print("\(error)") } }

no output

おお、すごい！もうコンパイルできてる。

型チェックだけじゃなくて、ちゃんと実行可能形式として動くんですね

今調べてたら昨日話してた以外にも大量の PR が見つかって、動きそうな感じがしました。

@swift-main -Xfrontend -emit-sil -Xfrontend -enable-experimental-concurrency

import Foundation func download(from url: URL) async throws -> Data { fatalError("Unimplemented yet.") } let url: URL! = nil @asyncHandler func onButtonPressed(_ sender: Any) { do { let data = try await download(from: url) print(data.count) } catch { print("\(error)") } }

sil_stage canonical import Builtin import Swift import SwiftShims import Foundation func download(from url: URL) async throws -> Data @_hasStorage @_hasInitialValue let url: URL! { get } @asyncHandler func onButtonPressed(_ sender: Any) // url sil_global hidden [let] @$s4main3url10Foundation3URLVSgvp : $Optional<URL> // main sil @main : $@convention(c) (Int32, UnsafeMutablePointer<Optional<UnsafeMutablePointer<Int8>>>) -> Int32 { bb0(%0 : $Int32, %1 : $UnsafeMutablePointer<Optional<UnsafeMutablePointer<Int8>>>): alloc_global @$s4main3url10Foundation3URLVSgvp // id: %2 %3 = global_addr @$s4main3url10Foundation3URLVSgvp : $*Optional<URL> // user: %5 %4 = enum $Optional<URL>, #Optional.none!enumelt // user: %5 store %4 to %3 : $*Optional<URL> // id: %5 %6 = integer_literal $Builtin.Int32, 0 // user: %7 %7 = struct $Int32 (%6 : $Builtin.Int32) // user: %8 return %7 : $Int32 // id: %8 } // end sil function 'main' // download(from:) sil hidden @$s4main8download4from10Foundation4DataVAD3URLV_tYKF : $@convention(thin) (@guaranteed URL) -> (@owned Data, @error Error) { // %0 "url" // user: %1 bb0(%0 : $URL): debug_value %0 : $URL, let, name "url", argno 1 // id: %1 debug_value undef : $Error, var, name "$error", argno 2 // id: %2 %3 = string_literal utf8 "main/<stdin>" // user: %5 %4 = integer_literal $Builtin.Word, 12 // user: %9 %5 = builtin "ptrtoint_Word"(%3 : $Builtin.RawPointer) : $Builtin.Word // user: %9 br bb1 // id: %6 bb1: // Preds: bb0 %7 = integer_literal $Builtin.Int8, 2 // user: %9 br bb2 // id: %8 bb2: // Preds: bb1 %9 = struct $StaticString (%5 : $Builtin.Word, %4 : $Builtin.Word, %7 : $Builtin.Int8) // user: %28 %1

stdout.txt

https://file.io/uzVnu8ZE5LPO

`async/await` 関連

`actor` 関連

9:01 AM

今の状況でほんとに動くかまではわからないけど、構文は相当の範囲がカバーされてそう。 (edited)

@swift-main -Xfrontend -emit-sil -Xfrontend -enable-experimental-concurrency struct Foo { init() async throws { fatalError() } } (edited)

exit status: 1 with stderr:<stdin>:2:12: error: initializer cannot be marked 'async' init() async throws { ^~~~~~

@swift-main @swift-5.3.3 @swift-5.2.5 @swift-5.0.3 @swift-4.2.4

import Foundation @objc public protocol C { @objc optional var field1: ObjCBool { get set } } extension C { public func set(value: Bool) { self[keyPath: \C.field1] = ObjCBool(value) } }

exit status: 134 with stderr:

SIL verification failed: keypath value type should match value type of keypath pattern: leafTy == pattern->getValueType().subst(patternSubs)->getCanonicalType() Verifying instruction: -> %6 = keypath $ReferenceWritableKeyPath<C, Optional<ObjCBool>>, (root $C; settable_property $ObjCBool, id #C.field1!getter.1 : <Self where Self : C> (Self) -> () -> ObjCBool, getter @$s4main1CP6field110Foundation8ObjCBoolVvpAaB_pTK : $@convention(thin) (@in_guaranteed C) -> @out ObjCBool, setter @$s4main1CP6field110Foundation8ObjCBoolVvpAaB_pTk : $@convention(thin) (@in_guaranteed ObjCBool, @in_guaranteed C) -> ()) // users: %20, %16 %16 = apply %15<C, Optional<ObjCBool>>(%11, %6, %13) : $@convention(thin) <τ_0_0, τ_0_1> (@in_guaranteed τ_0_0, @guaranteed ReferenceWritableKeyPath<τ_0_0, τ_0_1>, @in τ_0_1) -> () destroy_value %6 : $ReferenceWritableKeyPath<C, Optional<ObjCBool>> // id: %20 In function: // C.set(value:) sil [ossa] @$s4main1CPAAE3set5valueySb_tF : $@convention(method) <Self where Self : C> (Bool, @guaranteed Self) -> () { // %0 // users: %9, %2 // %1 // users: %4, %3 bb0(%0 : $Bool, %1 : @guaranteed $Self): debug_value %0 : $Bool, let, name "value", argno 1 // id: %2 debug_value %1 : $Self, let, name "self", argno 2 // id: %3 %4 = copy_value %1 : $Self // user: %5 %5 = init_existential_ref %4 : $Self : $Self, $C // user: %12 %6 = keypath $ReferenceWritableKeyPath<C, Optional<ObjCBool>>, (root $C; settable_property $ObjCBool, id #C.field1!getter.1 : <Self where Self : C> (Self) -> () -> ObjCBool, getter @$s4main1CP6field110Foundation8ObjCBoolVvpAaB_pTK : $@convention(thin) (@in_guaranteed C) -> @out ObjCBool, setter @$s4main1CP6field110Foundation8ObjCBoolVvpAaB_pTk : $@convention(thin) (@in_guaranteed ObjCBool, @in_guaranteed C) -> ()) // users: %20, %16 %7 = metatype $@thin ObjCBool.Type /

stderr.txt

https://file.io/7oidh1pNwh3U

exit status: 134 with stderr:

SIL verification failed: keypath value type should match value type of keypath pattern: leafTy == pattern->getValueType().subst(patternSubs)->getCanonicalType() Verifying instruction: -> %6 = keypath $ReferenceWritableKeyPath<C, Optional<ObjCBool>>, (root $C; settable_property $ObjCBool, id #C.field1!getter.1 : <Self where Self : C> (Self) -> () -> ObjCBool, getter @$s4main1CP6field110Foundation8ObjCBoolVvpAaB_pTK : $@convention(thin) (@in_guaranteed C) -> @out ObjCBool, setter @$s4main1CP6field110Foundation8ObjCBoolVvpAaB_pTk : $@convention(thin) (@in_guaranteed ObjCBool, @in_guaranteed C) -> ()) // users: %20, %16 %16 = apply %15<C, Optional<ObjCBool>>(%11, %6, %13) : $@convention(thin) <τ_0_0, τ_0_1> (@in_guaranteed τ_0_0, @guaranteed ReferenceWritableKeyPath<τ_0_0, τ_0_1>, @in τ_0_1) -> () destroy_value %6 : $ReferenceWritableKeyPath<C, Optional<ObjCBool>> // id: %20 In function: // C.set(value:) sil @$s4main1CPAAE3set5valueySb_tF : $@convention(method) <Self where Self : C> (Bool, @guaranteed Self) -> () { // %0 // users: %9, %2 // %1 // users: %4, %3 bb0(%0 : @trivial $Bool, %1 : @guaranteed $Self): debug_value %0 : $Bool, let, name "value", argno 1 // id: %2 debug_value %1 : $Self, let, name "self", argno 2 // id: %3 %4 = copy_value %1 : $Self // user: %5 %5 = init_existential_ref %4 : $Self : $Self, $C // user: %12 %6 = keypath $ReferenceWritableKeyPath<C, Optional<ObjCBool>>, (root $C; settable_property $ObjCBool, id #C.field1!getter.1 : <Self where Self : C> (Self) -> () -> ObjCBool, getter @$s4main1CP6field110Foundation8ObjCBoolVvpAaB_pTK : $@convention(thin) (@in_guaranteed C) -> @out ObjCBool, setter @$s4main1CP6field110Foundation8ObjCBoolVvpAaB_pTk : $@convention(thin) (@in_guaranteed ObjCBool, @in_guaranteed C) -> ()) // users: %20, %16 %7 = metatype $@thin ObjCBool.Type

stderr.txt

https://file.io/EjCcM23XXW2k

exit status: 134 with stderr:

SIL verification failed: keypath value type should match value type of keypath pattern Optional<ObjCBool> ObjCBool Verifying instruction: -> %6 = keypath $ReferenceWritableKeyPath<C, Optional<ObjCBool>>, (root $C; settable_property $ObjCBool, id #C.field1!getter : <Self where Self : C> (Self) -> () -> ObjCBool, getter @$s4main1CP6field110Foundation8ObjCBoolVvpAaB_pTK : $@convention(thin) (@in_guaranteed C) -> @out ObjCBool, setter @$s4main1CP6field110Foundation8ObjCBoolVvpAaB_pTk : $@convention(thin) (@in_guaranteed ObjCBool, @in_guaranteed C) -> ()) // users: %20, %16 %16 = apply %15<C, Optional<ObjCBool>>(%11, %6, %13) : $@convention(thin) <τ_0_0, τ_0_1> (@in_guaranteed τ_0_0, @guaranteed ReferenceWritableKeyPath<τ_0_0, τ_0_1>, @in τ_0_1) -> () destroy_value %6 : $ReferenceWritableKeyPath<C, Optional<ObjCBool>> // id: %20 In function: // C.set(value:) sil [ossa] @$s4main1CPAAE3set5valueySb_tF : $@convention(method) <Self where Self : C> (Bool, @guaranteed Self) -> () { // %0 "value" // users: %9, %2 // %1 "self" // users: %4, %3 bb0(%0 : $Bool, %1 : @guaranteed $Self): debug_value %0 : $Bool, let, name "value", argno 1 // id: %2 debug_value %1 : $Self, let, name "self", argno 2 // id: %3 %4 = copy_value %1 : $Self // user: %5 %5 = init_existential_ref %4 : $Self : $Self, $C // user: %12 %6 = keypath $ReferenceWritableKeyPath<C, Optional<ObjCBool>>, (root $C; settable_property $ObjCBool, id #C.field1!getter : <Self where Self : C> (Self) -> () -> ObjCBool, getter @$s4main1CP6field110Foundation8ObjCBoolVvpAaB_pTK : $@convention(thin) (@in_guaranteed C) -> @out ObjCBool, setter @$s4main1CP6field110Foundation8ObjCBoolVvpAaB_pTk : $@convention(thin) (@in_guaranteed ObjCBool, @in_guaranteed C) -> ()) // users: %20, %16 %7 = metatype $@thin ObjCBool.Type // user: %9 // function_ref ObjCBool.init(_:)

stderr.txt

https://file.io/D35PNvjCisi2

exit status: 1 with stderr:

<stdin>:5:9: error: property cannot be marked @objc because its type cannot be represented in Objective-C var field1: ObjCBool { get set } ^ ~~~~~~~~ <stdin>:5:17: note: Swift structs cannot be represented in Objective-C var field1: ObjCBool { get set } ^~~~~~~~

exit status: 134 with stderr:

SIL verification failed: keypath value type should match value type of keypath pattern Optional<ObjCBool> ObjCBool Verifying instruction: -> %6 = keypath $ReferenceWritableKeyPath<C, Optional<ObjCBool>>, (root $C; settable_property $ObjCBool, id #C.field1!getter : <Self where Self : C> (Self) -> () -> ObjCBool, getter @$s4main1CP6field110Foundation8ObjCBoolVvpAaB_pTK : $@convention(thin) (@in_guaranteed C) -> @out ObjCBool, setter @$s4main1CP6field110Foundation8ObjCBoolVvpAaB_pTk : $@convention(thin) (@in_guaranteed ObjCBool, @in_guaranteed C) -> ()) // users: %20, %16 %16 = apply %15<C, Optional<ObjCBool>>(%11, %6, %13) : $@convention(thin) <τ_0_0, τ_0_1> (@in_guaranteed τ_0_0, @guaranteed ReferenceWritableKeyPath<τ_0_0, τ_0_1>, @in τ_0_1) -> () destroy_value %6 : $ReferenceWritableKeyPath<C, Optional<ObjCBool>> // id: %20 In function: // C.set(value:) sil [ossa] @$s4main1CPAAE3set5valueySb_tF : $@convention(method) <Self where Self : C> (Bool, @guaranteed Self) -> () { // %0 "value" // users: %9, %2 // %1 "self" // users: %4, %3 bb0(%0 : $Bool, %1 : @guaranteed $Self): debug_value %0 : $Bool, let, name "value", argno 1 // id: %2 debug_value %1 : $Self, let, name "self", argno 2 // id: %3 %4 = copy_value %1 : $Self // user: %5 %5 = init_existential_ref %4 : $Self : $Self, $C // user: %12 %6 = keypath $ReferenceWritableKeyPath<C, Optional<ObjCBool>>, (root $C; settable_property $ObjCBool, id #C.field1!getter : <Self where Self : C> (Self) -> () -> ObjCBool, getter @$s4main1CP6field110Foundation8ObjCBoolVvpAaB_pTK : $@convention(thin) (@in_guaranteed C) -> @out ObjCBool, setter @$s4main1CP6field110Foundation8ObjCBoolVvpAaB_pTk : $@convention(thin) (@in_guaranteed ObjCBool, @in_guaranteed C) -> ()) // users: %20, %16 %7 = metatype $@thin ObjCBool.Type // user: %9 // function_ref ObjCBool.init(_:)

stderr.txt

https://file.io/Ckrkt1FqwsaB

@swift-main class Foo<T> {} class Bar: Foo<Bar> {} func foo<F: Foo<F>>(_ foo: F) {}

exit status: 1 with stderr:<stdin>:4:13: error: superclass constraint 'F' : 'Foo<F>' is recursive func foo<F: Foo<F>>(_ foo: F) {} ^

@swift-main -Xfrontend -enable-experimental-concurrency

import Dispatch func suspendAsync<T>( _ body: (_ continuation: @escaping (T) -> ()) -> () ) async -> T { let semaphore = DispatchSemaphore(value: 0) var result: T! body { value in result = value semaphore.signal() } semaphore.wait() return result } extension DispatchQueue { func asyncAfter(deadline: DispatchTime) async { await suspendAsync { continuation in asyncAfter(deadline: deadline) { continuation(()) } } } } @asyncHandler func main() { print("A") await DispatchQueue.global().asyncAfter(deadline: .now() + 1) print("B") await DispatchQueue.global().asyncAfter(deadline: .now() + 1) print("C") } main()

A B C

@swift-5.3.3 @swift-5.2.5

func primes(upTo number: Int) -> [Int] { precondition(number >= 0) if number < 2 { return [] } var sieve: [Bool] = .init(repeating: false, count: number + 1) for m in stride(from: 3, through: Int(Double(number).squareRoot() + 1.5), by: 2) { if sieve[m] { continue } let maxK = number / m if maxK < 2 { continue } for k in 2 ... maxK { sieve[k * m] = true } } var result: [Int] = [2] for m in stride(from: 3, through: number, by: 2) { if sieve[m] { continue } result.append(m) } return result } print(primes(upTo: 100))

[2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97]

@swift-5.1.5

func primes(upTo number: Int) -> [Int] { precondition(number >= 0) if number < 2 { return [] } var sieve: [Bool] = .init(repeating: false, count: number + 1) for m in stride(from: 3, through: Int(Double(number).squareRoot() + 1.5), by: 2) { if sieve[m] { continue } let maxK = number / m if maxK < 2 { continue } for k in 2 ... maxK { sieve[k * m] = true } } var result: [Int] = [2] for m in stride(from: 3, through: number, by: 2) { if sieve[m] { continue } result.append(m) } return result } print(primes(upTo: 100))

[2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97]

@swift-5.2.5 print("Hello, World!")

Hello, World!

@swift-5.3.3 -version

Swift version 5.3.1 (swift-5.3.1-RELEASE) Target: x86_64-unknown-linux-gnu

execution timeout with no output

1

@swift-5.3.3 -O

import Foundation func measure(_ body: () -> Void) { let start = Date.timeIntervalSinceReferenceDate for _ in 0 ..< 10 { body() } let end = Date.timeIntervalSinceReferenceDate print((end - start) / 10) } extension Array { mutating func mySwapAt(_ i: Int, _ j: Int) { let t = self[i] self[i] = self[j] self[j] = t } } func swapBySwapAt(_ array: inout [Int]) { for i in array.indices.dropFirst() { array.swapAt(i - 1, i) } } func swapByT(_ array: inout [Int]) { for i in array.indices.dropFirst() { let t = array[i] array[i] = array[i - 1] array[i - 1] = t } } func swapByMySwapAt(_ array: inout [Int]) { for i in array.indices.dropFirst() { array.mySwapAt(i - 1, i) } } let n: Int = 10_000_000 + (1 ... 100).randomElement()! var a: [Int] = Array(1 ... n) measure { swapBySwapAt(&a) } measure { swapByT(&a) } measure { swapByMySwapAt(&a) } print(a.count)

0.07282540798187256 0.07877689599990845 0.0749101996421814 10000014

手元と結果が違うｗ

Linuxだから？

9:42 AM

あーでもArrayなのか

9:42 AM

Foudationの違いは関係無さそうだ (edited)

手元環境だと swapBySwapAt が 10% くらい遅いんだけどなぁ。

CPUの違いでベクトル最適化が効いたり効かなかったりとかもあるかも

トピックが一つ死んだ

@swift-5.3.3 -O

import Foundation func measure(_ body: () -> Void) { let start = Date.timeIntervalSinceReferenceDate for _ in 0 ..< 10 { body() } let end = Date.timeIntervalSinceReferenceDate print((end - start) / 10) } func mapFilter(_ n: Int) -> [Int] { precondition(n >= 1) return (1 ... n).map { $0 * $0 }.filter { $0 % 7 == 1 } } func lazyMapFilter(_ n: Int) -> [Int] { precondition(n >= 1) return Array((1 ... n).lazy.map { $0 * $0 }.filter { $0 % 7 == 1 }) } func mapFilterByLoop(_ n: Int) -> [Int] { precondition(n >= 1) var result: [Int] = [] for i in 1 ... n { let square = i * i guard square % 7 == 1 else { continue } result.append(square) } return result } let n: Int = 10_000_000 + (1 ... 100).randomElement()! var a = 0 measure { a += mapFilter(n).count } measure { a += lazyMapFilter(n).count } measure { a += mapFilterByLoop(n).count } print(a)

0.5088738918304443 0.09912219047546386 0.09465489387512208 85715100

@swift-5.3.3 -O

import Foundation func measure(_ body: () -> Void) { let start = Date.timeIntervalSinceReferenceDate for _ in 0 ..< 10 { body() } let end = Date.timeIntervalSinceReferenceDate print((end - start) / 10) } func sumOfArray(_ a: [Int], indices: [Int]) -> Int { var sum = 0 for i in indices { sum &+= a[i] } return sum } func sumOfArraySlice(_ a: ArraySlice<Int>, indices: [Int]) -> Int { var sum = 0 for i in indices { sum &+= a[i] } return sum } let n: Int = 1_000_000 + (1 ... 100).randomElement()! let a: [Int] = .init(1 ... n) let b: ArraySlice<Int> = .init(a) let indices: [Int] = a.indices.shuffled() var sum = 0 measure { sum &+= sumOfArray(a, indices: indices) } measure { sum &+= sumOfArraySlice(b, indices: indices) } print(sum)

0.02275540828704834 0.022072792053222656 10002010101000

なんかいろいろでてくる

@swift-5.3.3 -O

import Foundation func measure(_ body: () -> Void) { let start = Date.timeIntervalSinceReferenceDate for _ in 0 ..< 10 { body() } let end = Date.timeIntervalSinceReferenceDate print((end - start) / 10) } public func sumOfEvensByStride(_ n: Int) -> Int { var sum = 0 for m in stride(from: 0, through: n * 2, by: 2) { sum &+= m } return sum } public func sumOfEvensByRange(_ n: Int) -> Int { var sum = 0 for m in 0 ... n { sum &+= m * 2 } return sum } public func sumOfMultiplesByStride(_ n: Int, k: Int) -> Int { var sum = 0 for m in stride(from: 0, through: n * k, by: k) { sum &+= m } return sum } public func sumOfMultiplesByRange(_ n: Int, k: Int) -> Int { var sum = 0 for m in 0 ... n { sum &+= m * k } return sum } let n = 100_000_000 + (1 ... 100).randomElement()! var a = 0 measure { a &+= sumOfEvensByStride(n) } measure { a &+= sumOfEvensByRange(n) } measure { a &+= sumOfMultiplesByStride(n, k: 3) } measure { a &+= sumOfMultiplesByRange(n, k: 3) } print(a)

0.1298200011253357 0.0950276017189026 0.09767409563064575 0.09397300481796264 500000385000074100

@swift-main -Xfrontend -enable-experimental-concurrency

// Ported from https://www.raywenderlich.com/741-swift-algorithm-club-swift-merge-sort func mergeSort<T: Comparable>(_ array: [T]) async -> [T] { guard array.count > 1 else { return array } let middleIndex = array.count / 2 async let leftArray = await mergeSort(Array(array[0..<middleIndex])) async let rightArray = await mergeSort(Array(array[middleIndex..<array.count])) return merge(await leftArray, await rightArray) } func merge<T: Comparable>(_ left: [T], _ right: [T]) -> [T] { var leftIndex = 0 var rightIndex = 0 var orderedArray: [T] = [] while leftIndex < left.count && rightIndex < right.count { let leftElement = left[leftIndex] let rightElement = right[rightIndex] if leftElement < rightElement { orderedArray.append(leftElement) leftIndex += 1 } else if leftElement > rightElement { orderedArray.append(rightElement) rightIndex += 1 } else { orderedArray.append(leftElement) leftIndex += 1 orderedArray.append(rightElement) rightIndex += 1 } } while leftIndex < left.count { orderedArray.append(left[leftIndex]) leftIndex += 1 } while rightIndex < right.count { orderedArray.append(right[rightIndex]) rightIndex += 1 } return orderedArray } func getRandomArray(n: Int) -> [Int] { var array = [Int]() for i in 0..<n { array.append(Int.random(in: 0..<1000)) } return array } func test(n: Int) async { let array = getRandomArray(n: n) let sortedArray = await mergeSort(array) print(sortedArray) } runAsyncAndBlock { await test(n: 100) }

(edited)

[2, 19, 20, 28, 28, 52, 67, 69, 72, 89, 91, 103, 104, 106, 116, 125, 165, 175, 184, 187, 196, 198, 208, 211, 214, 235, 243, 247, 248, 251, 268, 293, 306, 309, 312, 321, 339, 339, 345, 364, 393, 396, 404, 406, 420, 425, 434, 446, 453, 455, 474, 478, 480, 483, 485, 487, 488, 493, 499, 511, 520, 528, 543, 604, 628, 636, 645, 650, 650, 666, 670, 673, 678, 690, 713, 716, 720, 721, 723, 730, 761, 764, 797, 811, 819, 832, 834, 839, 843, 844, 860, 885, 905, 916, 925, 931, 942, 959, 959, 986]

stderr:

<stdin>:52:7: warning: immutable value 'i' was never used; consider replacing with '_' or removing it for i in 0..<n { ^ _

(edited)

5.4のスナップショットは年内に出始めそう。 https://ci.swift.org/view/Swift%205.4/

@swift-main -Xfrontend -enable-experimental-concurrency

// // main.swift // ConcurrencyPlayground // // Created by Max Desiatov on 07/01/2021. // import _Concurrency import Foundation import FoundationNetworking struct UnknownError: Error {} func download(url: URL) async throws -> Data { try await withUnsafeThrowingContinuation { c in let task = URLSession.shared.dataTask(with: url) { data, _, error in switch (data, error) { case let (_, error?): return c.resume(throwing: error) case let (data?, _): return c.resume(returning: data) case (nil, nil): c.resume(throwing: UnknownError()) } } task.resume() } } runAsyncAndBlock { print("task started") let data = try! await download(url: URL(string: "https://httpbin.org/uuid")!) print(String(data: data, encoding: .utf8)!) } print("end of main")

(edited)

task started end of main

exit status: 11 with stderr:

Please submit a bug report (https://swift.org/contributing/#reporting-bugs) and include the project and the crash backtrace. /usr/bin/swift-frontend[0x56a4d34] /usr/bin/swift-frontend[0x56a2bb0] /usr/bin/swift-frontend[0x56a4f1a] /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7f6d470ce390] /lib/x86_64-linux-gnu/libc.so.6(strlen+0x26)[0x7f6d45a89746] /lib/x86_64-linux-gnu/libc.so.6(__strdup+0xe)[0x7f6d45a8947e] /usr/lib/x86_64-linux-gnu/libcurl.so.4(+0x1de88)[0x7f6d3e9dde88] /usr/lib/x86_64-linux-gnu/libcurl.so.4(curl_easy_setopt+0x9e)[0x7f6d3e9ed8ae] /usr/lib/swift/linux/libFoundationNetworking.so($s20FoundationNetworking11_EasyHandleC3set3urly0A03URLV_tF+0xcc)[0x7f6d3ed25afc] /usr/lib/swift/linux/libFoundationNetworking.so($s20FoundationNetworking16_HTTPURLProtocolC19configureEasyHandle3for4bodyyAA10URLRequestV_AA14URLSessionTaskC5_BodyOtF+0x230)[0x7f6d3ecf65f0] /usr/lib/swift/linux/libFoundationNetworking.so(+0xd5bb3)[0x7f6d3ed04bb3] /usr/lib/swift/linux/libFoundationNetworking.so($s20FoundationNetworking14URLSessionTaskC7getBody10completionyyAC01_F0Oc_tF+0x128)[0x7f6d3ed14a48] /usr/lib/swift/linux/libFoundationNetworking.so($s20FoundationNetworking15_NativeProtocolC16startNewTransfer4withyAA10URLRequestV_tF+0xe1)[0x7f6d3ed02041] /usr/lib/swift/linux/libFoundationNetworking.so($s20FoundationNetworking15_NativeProtocolC6resumeyyF+0x28a)[0x7f6d3ed0233a] /usr/lib/swift/linux/libFoundationNetworking.so(+0xf04c7)[0x7f6d3ed1f4c7] /usr/lib/swift/linux/libFoundationNetworking.so(+0xa0c59)[0x7f6d3eccfc59] /usr/lib/swift/linux/libdispatch.so(+0x224e7)[0x7f6d3ef8d4e7] /usr/lib/swift/linux/libdispatch.so(+0x2de39)[0x7f6d3ef98e39] /usr/lib/swift/linux/libdispatch.so(+0x2eade)[0x7f6d3ef99ade] /usr/lib/swift/linux/libdispatch.so(+0x2dcd4)[0x7f6d3ef98cd4] /usr/lib/swift/linux/libdispatch.so(+0x2eade)[0x7f6d3ef99ade] /usr/lib/swift/linux/libdispatch.so(+0x36752)[0x7f6d3efa1752] /lib/x86_64-linux-gnu/libpthread.so.0(+0x76ba)[0x7f6d470c46ba] /li

stderr.txt

https://file.io/JGFSuuFzW0TW

@swift-5.4.3 -version

Swift version 5.3-dev (LLVM 52eb795d06cc2c1, Swift eb8c8ecef009d64) Target: x86_64-unknown-linux-gnu

@swift-5.4.3 import Foundation print(ProcessInfo.processInfo.environment["SWIFT_VERSION"]!)

5.4-DEVELOPMENT-SNAPSHOT-2021-01-11-a

@swift-5.4.3 -Xfrontend -enable-experimental-concurrency

// // main.swift // ConcurrencyPlayground // // Created by Max Desiatov on 07/01/2021. // import _Concurrency import Foundation import FoundationNetworking struct UnknownError: Error {} func download(url: URL) async throws -> Data { await try withUnsafeThrowingContinuation { c in let task = URLSession.shared.dataTask(with: url) { data, _, error in switch (data, error) { case let (_, error?): return c.resume(throwing: error) case let (data?, _): return c.resume(returning: data) case (nil, nil): c.resume(throwing: UnknownError()) } } task.resume() } } runAsyncAndBlock { print("task started") let data = await try! download(url: URL(string: "https://httpbin.org/uuid")!) print(String(data: data, encoding: .utf8)!) } print("end of main")

(edited)

task started end of main (edited)

@swift-main -Xfrontend -enable-experimental-concurrency print(Task.self)

Task

おお。居る。

@swift-main -Xfrontend -enable-experimental-concurrency print(await Task.currentPriority())

exit status: 1 with stderr:<stdin>:1:13: error: 'async' in a function that does not support concurrency print(await Task.currentPriority()) ^

@swift-main -Xfrontend -enable-experimental-concurrency print(Task.userInteractive)

exit status: 1 with stderr:<stdin>:1:12: error: type 'Task' has no member 'userInteractive' print(Task.userInteractive) ~~~~ ^~~~~~~~~~~~~~~

@swift-main -Xfrontend -enable-experimental-concurrency print(Task.Priority.self) (edited)

Priority

@swift-main -Xfrontend -enable-experimental-concurrency print(Task.Priority.init(rawValue: 0)!)

unspecified

@swift-main -Xfrontend -enable-experimental-concurrency print(Task.Priority.init(rawValue: 1)!)

exit status: 4 with stderr:

main/<stdin>:1: Fatal error: Unexpectedly found nil while unwrapping an Optional value Current stack trace: 0 libswiftCore.so 0x00007f8d025ef150 swift_reportError + 50 1 libswiftCore.so 0x00007f8d026638f0 _swift_stdlib_reportFatalErrorInFile + 112 2 libswiftCore.so 0x00007f8d02343de6 <unavailable> + 1433062 3 libswiftCore.so 0x00007f8d02343a0f <unavailable> + 1432079 4 libswiftCore.so 0x00007f8d023437ac <unavailable> + 1431468 5 libswiftCore.so 0x00007f8d023432c0 _assertionFailure(_:_:file:line:flags:) + 441 7 swift-frontend 0x0000000000597635 <unavailable> + 1668661 8 swift-frontend 0x000000000056102e <unavailable> + 1445934 9 swift-frontend 0x000000000052c442 <unavailable> + 1229890 10 swift-frontend 0x000000000052baac <unavailable> + 1227436 11 swift-frontend 0x000000000051ee4d <unavailable> + 1175117 12 swift-frontend 0x00000000004b8f78 <unavailable> + 757624 13 libc.so.6 0x00007f8d0462a740 __libc_start_main + 240 14 swift-frontend 0x00000000004b8a49 <unavailable> + 756297 Please submit a bug report (https://swift.org/contributing/#reporting-bugs) and include the project and the crash backtrace. Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -I /Libraries/.build/x86_64-unknown-linux-gnu/debug -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOHTTPParser/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOSHA1/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOAtomics/include -I /Libraries/.build

stderr.txt

https://file.io/KSpVVIQkSIKS

@swift-main -Xfrontend -enable-experimental-concurrency let handle: Task.Handle<Int, Never> = Task.runDetached { 42 } print(await handle.get()) (edited)

exit status: 1 with stderr:

<stdin>:1:18: error: generic type 'Handle' specialized with too many type parameters (got 2, but expected 1) let handle: Task.Handle<Int, Never> = Task.runDetached { 42 } ^ ~~~~~~~~~~~~ _Concurrency.Task:2:19: note: generic type 'Handle' declared here public struct Handle<Success> { ^

@swift-main -Xfrontend -enable-experimental-concurrency let handle: Task.Handle<Int> = Task.runDetached { 42 } print(try await handle.get()) (edited)

exit status: 1 with stderr:<stdin>:2:17: error: 'async' in a function that does not support concurrency print(try await handle.get()) ^ (edited)

@swift-main -Xfrontend -enable-experimental-concurrency _ = Task.runDetached { 42 }

no output

@swift-main -Xfrontend -enable-experimental-concurrency func foo() async -> Int { 42 } @asyncHandler func bar() { let a = await foo() print(a) }

no output

@swift-main -Xfrontend -enable-experimental-concurrency func foo() async -> Int { 3 } func main() async { async let a = foo() async let b = foo() print(await a + b) }

no output

@swift-main -Xfrontend -enable-experimental-concurrency

func foo() async -> Int { 3 } func main() async { async let a = foo() async let b = foo() print(await a + b) } runAsyncAndBlock { await main() }

(edited)

6

@swift-main @swift-5.4.3 -Xfrontend -enable-experimental-concurrency

func f() async throws -> Int { 1 } func g() async throws -> Int { let a = try await f() let b = await try f() return a + b }

stderr:<stdin>:4:13: warning: 'try' must precede 'await' let b = await try f() ^~~~~~ await

exit status: 1 with stderr:<stdin>:3:17: error: 'await' must precede 'try' let a = try await f() ^~~~~~ await

@swift-main -Xfrontend -enable-experimental-concurrency func foo() async -> Int { 42 } runAsyncAndBlock { await foo() } (edited)

stderr:<stdin>:2:26: warning: result of call to 'foo()' is unused runAsyncAndBlock { await foo() } ^ ~~

@swift-main -Xfrontend -enable-experimental-concurrency

exit status: 127 with stderr:

/usr/bin/lldb: error while loading shared libraries: libpython3.5m.so.1.0: cannot open shared object file: No such file or directory

@swift-main -Xfrontend -enable-experimental-concurrency

import Foundation import FoundationNetworking struct User: Identifiable, Codable { typealias ID = Int let id: ID var name: String var thumbnailURL: URL } func download(from url: URL, completion: @escaping (Data) -> Void) { let data: Data = try! Data(contentsOf: url) completion(data) } func fetchUser(for id: User.ID, completion: @escaping (User) -> Void) { let url: URL = URL(string: "https://koherent.org/async-await-challenge/api/user?id=\(id.description)")! download(from: url) { data in let user = try! JSONDecoder().decode(User.self, from: data) completion(user) } } fetchUser(for: 123) { user in print(user.name) }

koher

@swift-main -Xfrontend -enable-experimental-concurrency

 import Foundation struct User: Identifiable, Codable { typealias ID = Int let id: ID var name: String var thumbnailURL: URL } func download(from url: URL) async -> Data { let data: Data = try! Data(contentsOf: url) return data } func fetchUser(for id: User.ID) async -> User { let url: URL = URL(string: "https://koherent.org/async-await-challenge/api/user?id=\(id.description)")! let data = await download(from: url) let user = try! JSONDecoder().decode(User.self, from: data) return user } runAsyncAndBlock { let user = await fetchUser(for: 123) print(user.name) }

(edited)

exit status: 4 with stderr:

Foundation/NSSwiftRuntime.swift:401: Fatal error: You must link or load module FoundationNetworking to load non-file: URL content using String(contentsOf:…), Data(contentsOf:…), etc. Please submit a bug report (https://swift.org/contributing/#reporting-bugs) and include the project and the crash backtrace. Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -I /Libraries/.build/x86_64-unknown-linux-gnu/debug -module-cache-path /Libraries/.build/x86_64-unknown-linux-gnu/debug/ModuleCache -D DEBUG -enable-experimental-concurrency -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOHTTPParser.build/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/swift-nio/Sources/CNIOHTTPParser/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOSHA1.build/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/swift-nio/Sources/CNIOSHA1/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOAtomics.build/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/swift-nio/Sources/CNIOAtomics/include -Xcc -fmodule-map-file=/Libraries/.build/checkouts/swift-nio/Sources/CNIOWindows/include/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/swift-nio/Sources/CNIOWindows/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIODarwin.build/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/swift-nio/Sources/CNIODarwin/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-li

(edited)

stderr.txt

https://file.io/Z6YpD5mu8K6J

@swift-main -Xfrontend -enable-experimental-concurrency

import Foundation import FoundationNetworking struct User: Identifiable, Codable { typealias ID = Int let id: ID var name: String var thumbnailURL: URL } func download(from url: URL) async -> Data { let data: Data = try! Data(contentsOf: url) return data } func fetchUser(for id: User.ID) async -> User { let url: URL = URL(string: "https://koherent.org/async-await-challenge/api/user?id=\(id.description)")! let data = await download(from: url) return try! JSONDecoder().decode(User.self, from: data) } runAsyncAndBlock { let user = await fetchUser(for: 123) print(user.name) }

koher

@swift-5.3.3

import Foundation extension Process { struct RunResult { var output: Data var error: Data var status: Int32 } static func which(_ i: Int) throws -> RunResult { let p = Process() p.executableURL = URL(fileURLWithPath: "/usr/bin/which") p.arguments = ["which"] let g = DispatchGroup() var outData = Data() let outPipe = Pipe() p.standardOutput = outPipe g.enter() outPipe.fileHandleForReading.readabilityHandler = { (handle) in let availableData = handle.availableData outData.append(availableData) print("[\(i)] stdout \(availableData)") if availableData.isEmpty { outPipe.fileHandleForReading.readabilityHandler = nil g.leave() } } var errData = Data() let errPipe = Pipe() p.standardError = errPipe g.enter() errPipe.fileHandleForReading.readabilityHandler = { (handle) in let availableData = handle.availableData errData.append(availableData) print("[\(i)] stderr \(availableData)") if availableData.isEmpty { errPipe.fileHandleForReading.readabilityHandler = nil g.leave() } } try p.run() p.waitUntilExit() print("[\(i)] process end") guard case .success = g.wait(timeout: .now()+3) else { fatalError("[\(i)] timeout") } print("[\(i)] wait end") let status = p.terminationStatus let result = RunResult(output: outData, error: errData, status: status) print("[\(i)] end output=\(result.output) error=\(result.error)") return result } } DispatchQueue.concurrentPerform(iterations: 3) { i in _ = try! Process.which(i) } print("end")

exit status: 4 with stderr:

Fatal error: [1] timeout: file main/<stdin>, line 46 Fatal error: [2] timeout: file main/<stdin>, line 46 Current stack trace: Current stack trace: Fatal error: [0] timeout: file main/<stdin>, line 46 Current stack trace: 0 libswiftCore.so 0x00007f76f2276df0 swift_reportError + 50 1 libswiftCore.so 0x00007f76f22ea160 _swift_stdlib_reportFatalErrorInFile + 115 2 libswiftCore.so 0x00007f76f1fcfeb5 <unavailable> + 1400501 3 libswiftCore.so 0x00007f76f1fcfaf7 <unavailable> + 1399543 4 libswiftCore.so 0x00007f76f1fd00e2 <unavailable> + 1401058 5 libswiftCore.so 0x00007f76f1fce530 _assertionFailure(_:_:file:line:flags:) + 517 8 libswiftDispatch.so 0x00007f76ee5f2bf1 <unavailable> + 117745 9 libswiftDispatch.so 0x00007f76ee5f2c14 <unavailable> + 117780 10 libdispatch.so 0x00007f76ee39560e <unavailable> + 128526 11 libdispatch.so 0x00007f76ee3ac787 <unavailable> + 223111 12 libpthread.so.0 0x00007f76f66ed6ba <unavailable> + 30394 13 libc.so.6 0x00007f76f4ef63b0 clone + 109 0 libswiftCore.so 0x00007f76f2276df0 swift_reportError + 50 0 libswiftCore.so 0x00007f76f2276df0 swift_reportError + 50 1 libswiftCore.so 0x00007f76f22ea160 _swift_stdlib_reportFatalErrorInFile + 115 2 libswiftCore.so 0x00007f76f1fcfeb5 <unavailable> + 1400501 3 libswiftCore.so 0x00007f76f1fcfaf7 <unavailable> + 1399543 4 libswiftCore.so 0x00007f76f1fd00e2 <unavailable> + 1401058 5 libswiftCore.so 0x00007f76f1fce530 _assertionFailure(_:_:file:line:flags:) + 517 8 libswiftDispatch.so 0x00007f76ee5f2bf1 <unavailable> + 117745 9 libswiftDispatch.so

stderr.txt

https://file.io/0Vs2mLkz5Yfh

@swift-5.3.3

import Foundation extension Process { struct RunResult { var output: Data var error: Data var status: Int32 } static func which(_ i: Int) throws -> RunResult { let p = Process() p.executableURL = URL(fileURLWithPath: "/usr/bin/which") p.arguments = ["which"] let g = DispatchGroup() var outData = Data() let outPipe = Pipe() p.standardOutput = outPipe g.enter() outPipe.fileHandleForReading.readabilityHandler = { (handle) in let availableData = handle.availableData outData.append(availableData) print("[\(i)] stdout \(availableData)") if availableData.isEmpty { outPipe.fileHandleForReading.readabilityHandler = nil g.leave() } } var errData = Data() let errPipe = Pipe() p.standardError = errPipe g.enter() errPipe.fileHandleForReading.readabilityHandler = { (handle) in let availableData = handle.availableData errData.append(availableData) print("[\(i)] stderr \(availableData)") if availableData.isEmpty { errPipe.fileHandleForReading.readabilityHandler = nil g.leave() } } try p.run() p.waitUntilExit() print("[\(i)] process end") guard case .success = g.wait(timeout: .now()+3) else { fatalError("[\(i)] timeout") } print("[\(i)] wait end") let status = p.terminationStatus let result = RunResult(output: outData, error: errData, status: status) print("[\(i)] end output=\(result.output) error=\(result.error)") return result } } DispatchQueue.concurrentPerform(iterations: 1) { i in _ = try! Process.which(i) } print("end")

exit status: 4 with stderr:

Fatal error: [0] timeout: file main/<stdin>, line 46 Current stack trace: 0 libswiftCore.so 0x00007fe78a46edf0 swift_reportError + 50 1 libswiftCore.so 0x00007fe78a4e2160 _swift_stdlib_reportFatalErrorInFile + 115 2 libswiftCore.so 0x00007fe78a1c7eb5 <unavailable> + 1400501 3 libswiftCore.so 0x00007fe78a1c7af7 <unavailable> + 1399543 4 libswiftCore.so 0x00007fe78a1c80e2 <unavailable> + 1401058 5 libswiftCore.so 0x00007fe78a1c6530 _assertionFailure(_:_:file:line:flags:) + 517 8 libswiftDispatch.so 0x00007fe7867eabf1 <unavailable> + 117745 9 libswiftDispatch.so 0x00007fe7867eac14 <unavailable> + 117780 10 libdispatch.so 0x00007fe78658df60 <unavailable> + 130912 11 libdispatch.so 0x00007fe7865993aa <unavailable> + 177066 12 libdispatch.so 0x00007fe78658da40 dispatch_apply_f + 1044 13 libswiftDispatch.so 0x00007fe7867eaaa0 static DispatchQueue.concurrentPerform(iterations:execute:) + 204 15 swift 0x00000000005b4501 <unavailable> + 1787137 16 swift 0x00000000005a1d04 <unavailable> + 1711364 17 swift 0x0000000000587e88 <unavailable> + 1605256 18 swift 0x000000000057b322 <unavailable> + 1553186 19 swift 0x00000000005780ef <unavailable> + 1540335 20 swift 0x0000000000501c2c <unavailable> + 1055788 21 libc.so.6 0x00007fe78d007740 __libc_start_main + 240 22 swift 0x00000000005017a9 <unavailable> + 1054633 Stack dump: 0. Program arguments: /usr/bin/swift -frontend -interpret - -disable-objc-interop -I /Libraries/.build/x86_64-unknown-linux-gnu/debug -I /Libr

stderr.txt

https://file.io/CrhLUnwZpqh5

@swift-5.3.3

import Foundation func print(_ item: String) { fputs(item + "\n", stderr) } extension Process { struct RunResult { var output: Data var status: Int32 } static func which(_ i: Int) throws -> RunResult { let p = Process() p.executableURL = URL(fileURLWithPath: "/usr/bin/which") p.arguments = ["which"] let g = DispatchGroup() var outData = Data() let outPipe = Pipe() p.standardOutput = outPipe g.enter() outPipe.fileHandleForReading.readabilityHandler = { (handle) in let availableData = handle.availableData outData.append(availableData) print("[\(i)] stdout \(availableData)") if availableData.isEmpty { outPipe.fileHandleForReading.readabilityHandler = nil g.leave() } } try p.run() p.waitUntilExit() print("[\(i)] process end") guard case .success = g.wait(timeout: .now()+3) else { fatalError("[\(i)] timeout") } print("[\(i)] wait end") let status = p.terminationStatus let result = RunResult(output: outData, status: status) print("[\(i)] end output=\(result.output)") return result } } DispatchQueue.concurrentPerform(iterations: 3) { i in _ = try! Process.which(i) } print("end")

exit status: 4 with stderr:

[2] process end [0] stdout 15 bytes [2] stdout 15 bytes [1] process end [1] stdout 15 bytes [0] process end Fatal error: [2] timeout: file main/<stdin>, line 34 Current stack trace: 0 libswiftCore.so 0x00007fbd21293df0 swift_reportError + 50 1 libswiftCore.so 0x00007fbd21307160 _swift_stdlib_reportFatalErrorInFile + 115 2 libswiftCore.so 0x00007fbd20feceb5 <unavailable> + 1400501 3 libswiftCore.so 0x00007fbd20fecaf7 <unavailable> + 1399543 4 libswiftCore.so 0x00007fbd20fed0e2 <unavailable> + 1401058 5 libswiftCore.so 0x00007fbd20feb530 _assertionFailure(_:_:file:line:flags:) + 517 8 libswiftDispatch.so 0x00007fbd1d60fbf1 <unavailable> + 117745 9 libswiftDispatch.so 0x00007fbd1d60fc14 <unavailable> + 117780 10 libdispatch.so 0x00007fbd1d3b260e <unavailable> + 128526 11 libdispatch.so 0x00007fbd1d3c9787 <unavailable> + 223111 12 libpthread.so.0 0x00007fbd2570a6ba <unavailable> + 30394 13 libc.so.6 0x00007fbd23f133b0 clone + 109 /usr/bin/swift[0x50aee34] /usr/bin/swift[0x50ace00] /usr/bin/swift[0x50af11a] /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7fbd25714390] /usr/lib/swift/linux/libswiftCore.so($ss17_assertionFailure__4file4line5flagss5NeverOs12StaticStringV_SSAHSus6UInt32VtF+0x212)[0x7fbd20feb742] [0x7fbd2594de50] [0x7fbd2594e209] /usr/lib/swift/linux/libswiftDispatch.so(+0x1cbf1)[0x7fbd1d60fbf1] /usr/lib/swift/linux/libswiftDispatch.so(+0x1cc14)[0x7fbd1d60fc14] /usr/lib/swift/linux/libdispatch.so(+0x1f60e)[0x7fbd1d3b260e] /usr/lib/swift/linux/libdispatch.so(+0x36787)[0x7fbd1d3c9787] /lib/x86_64-linux-gnu/libpthread.so.0(+0x76ba)[0x7fbd2570a6ba] /lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7fbd23f1341d]

@swift-main -Xfrontend -enable-experimental-concurrency -Xfrontend -parse-as-library

// // main.swift // ConcurrencyPlayground // // Created by Max Desiatov on 07/01/2021. // import Foundation import FoundationNetworking struct UnknownError: Error {} func download(url: URL) async throws -> Data { try await withUnsafeThrowingContinuation { c in let task = URLSession.shared.dataTask(with: url) { data, _, error in switch (data, error) { case let (_, error?): return c.resume(throwing: error) case let (data?, _): return c.resume(returning: data) case (nil, nil): c.resume(throwing: UnknownError()) } } task.resume() } } @main struct Main { static func main() async { print("task started") let data = try! await download(url: URL(string: "https://httpbin.org/uuid")!) print(String(data: data, encoding: .utf8)!) } }

task started { "uuid": "791fc520-32b9-40a9-bf49-77ca7f8e2d4e" }

お、 Linux でもちゃんと並行に動くようになったんですか？

2:29 AM

あ、 #swift の方でその話題 https://discord.com/channels/291054398077927425/291054454793306112/813681284592828427 になってた。 (edited)

koher

あ、 #swift の方でその話題 https://discord.com/channels/291054398077927425/291054454793306112/813681284592828427 になってた。 (edited)

そうそう。できるようになったので前に作られてたBefore/Afterの例とかすごくわかりやすかったのでよかったらシェアしてください

@swift-5.3.3

import Foundation let formatter = NumberFormatter() formatter.numberStyle = .decimal print("1:", formatter.string(from: 100)) // Optional("100") formatter.formatWidth = 6 print("2:", formatter.string(from: 100)) // Optional(" 100") formatter.paddingPosition = .beforePrefix print("3:", formatter.string(from: 100)) // Optional(" 100") formatter.paddingPosition = .afterPrefix print("4:", formatter.string(from: 100)) // Optional(" 100") formatter.paddingPosition = .beforeSuffix print("5:", formatter.string(from: 100)) // Optional("100 ") formatter.paddingPosition = .afterSuffix print("6:", formatter.string(from: 100)) // Optional("100 ")

(edited)

1: Optional("100") 2: Optional(" 100") 3: Optional(" 100") 4: Optional(" 100") 5: Optional("100 ") 6: Optional("100 ")stderr:

<stdin>:5:13: warning: expression implicitly coerced from 'String?' to 'Any' print("1:", formatter.string(from: 100)) // Optional("100") ^~~~~~~~~~~~~~~~~~~~~~~~~~~ <stdin>:5:23: note: provide a default value to avoid this warning print("1:", formatter.string(from: 100)) // Optional("100") ~~~~~~~~~~^~~~~~~~~~~~~~~~~ ?? <#default value#> <stdin>:5:23: note: force-unwrap the value to avoid this warning print("1:", formatter.string(from: 100)) // Optional("100") ~~~~~~~~~~^~~~~~~~~~~~~~~~~ ! <stdin>:5:23: note: explicitly cast to 'Any' with 'as Any' to silence this warning print("1:", formatter.string(from: 100)) // Optional("100") ~~~~~~~~~~^~~~~~~~~~~~~~~~~ as Any <stdin>:8:13: warning: expression implicitly coerced from 'String?' to 'Any' print("2:", formatter.string(from: 100)) // Optional(" 100") ^~~~~~~~~~~~~~~~~~~~~~~~~~~ <stdin>:8:23: note: provide a default value to avoid this warning print("2:", formatter.string(from: 100)) // Optional(" 100") ~~~~~~~~~~^~~~~~~~~~~~~~~~~ ?? <#default value#> <stdin>:8:23: note: force-unwrap the value to avoid this warning print("2:", formatter.string(from: 100)) // Optional(" 100") ~~~~~~~~~~^~~~~~~~~~~~~~~~~ ! <stdin>:8:23: note: explicitly cast to 'Any' with 'as Any' to silence this warning print("2:", formatter.string(from: 100)) // Optional(" 100") ~~~~~~~~~~^~~~~~~~~~~~~~~~~ as Any <stdin>:11:13: warning: expression implicitly coerced from 'String?' to 'Any' print("3:", formatter.string(from: 100)) // Optional(" 100") ^~~~~

(edited)

stderr.txt

https://file.io/F1Rd3qBJ7haw

@swift-5.3.3

import Foundation struct A: Encodable { var a1: Int = 1 var a2: Int = 2 } struct B: Encodable { var b1: Int = 3 var b2: Int = 4 } struct AAndB: Encodable { var a: A = .init() var b: B = .init() func encode(to encoder: Encoder) throws { try a.encode(to: encoder) try b.encode(to: encoder) } // func encode(to encoder: Encoder) throws { // do { // var c = encoder.singleValueContainer() // try c.encode(a) // } // do { // var c = encoder.singleValueContainer() // try c.encode(b) // } // } } func main() throws { let x = AAndB() let e = JSONEncoder() let j = try e.encode(x) print(String(decoding: j, as: UTF8.self)) } try! main()

{"a2":2,"b1":3,"a1":1,"b2":4}

https://forums.swift.org/t/array-compiles-to-array-of-type/45742 @swift-5.3.3 let foo = Array {} print(type(of: foo))

Array {} compiles to array of type [() -> ()]

So I just found this out. Not sure if it's a bug or somehow expected behavior. let foo = Array {} The code above works, and foo is inferred to be of type Array<() -> ()> aka [() -> ()] with a single element inside: an empty closure () -> () (which I assume is our {}). Digging deeper into which initializer is responsible for the instantiation,...

Array<() -> ()> (edited)

ｗｗｗ

この前のwaiwaiでも話題になった、 Trailing Closure のラベル省略が良くない事例だと思う。

init(arrayLiteral:) って Array Literal 用のinitだから、

4:46 AM

リテラルが書いてある場合もしくは、ラベルが書かれている場合しか、解決しないのが良さそう？

4:47 AM

ラベルが書かれていない場合、というケースはTrailing Closureを使ったときしか生じないだろうけど。

うん。普通はラベルがあるから意味わかるんだけど、 Trailing Closure になるとラベルが省略されて意味わからんくなってる。

意味わからなくなるのは幅広い問題ですね。

↓なら問題ないはず。 let foo = Array arrayLiteral: {}

それってIDEが解決するのは駄目なんだろうか

4:50 AM

今年のGSoCのテーマにもなってて。

4:50 AM

テキストデータとして書かれてなくても arrayLiteral: が Xcodeによって表示されてれば、問題は解決する。

source breaking すぎてもはや↑の変更はできないだろうけど、ラベルを許す、ラベルなしは警告とかならできそう。

警告じゃなくてGUI上で表示しちゃう。

4:51 AM

型推論の結果とかもそうする。

テキストデータとして書かれてなくても arrayLiteral: が Xcodeによって表示されてれば、問題は解決する。

現状としてはラベルがある場合は Trailing Closure を IDE がオススメしないのがいいんじゃない？

JetBrains方式っすね

今だと変数名を Alt + Click で表示だけど、そうじゃなくて、エディタがインラインテキストをさしこむかんじ。

Multiple Trailing Closure で最初のラベル省略が普通に使われてるから難しいかなぁ。

Kishikawa Katsumi

JetBrains方式っすね

はい。Kotlinはそうなってますね。なんかRustもそうなってきたらしくて。

実際のコードをそうした方がというのは思うけどIDEがそういうサポートを入れるのはそれはそれでかなり良いと思います。

それってラベルが言語機能である Swift と相性悪くないかなぁ。本物ラベルのときと IDE 挿入のときがあるわけで。

それは表現方法で大丈夫だと思いますよ。

視覚的に区別はできるでしょうけど、似ているけど異なる二つのものが共存する複雑性の問題という意味でです。

明らかにわかるようにすれば大丈夫だと思います。

型推論結果が let の右に出てたらわかりやすいと思う。

でもまあ初心者の人とか知らない人には難しくなる、というのはありそう。

4:55 AM

そう考えると簡単ではないか。。。

4:56 AM

リモートのトラブルシューティングで本当はラベル書いてないけどIDEが表示するから噛み合わない、とかあるかも。

あれだなあ、

4:56 AM

一個ずつAlt Clickするのはめんどくさいけど

4:56 AM

常に出てると混乱の原因にはなるから

4:56 AM

ショートカットを押してる間だけあらゆるものが浮かび上がるみたいな

4:56 AM

UIだったら便利そうだ

4:57 AM

見えないものが見えるようになるボタン

omochimetaru

型推論結果が let の右に出てたらわかりやすいと思う。

これも、パラメトリックポリモーフィズムでネストした長大な型パラメータが出来上がりがちなSwiftだと辛いかも？ショートカットの間だけとかならありだと思う。

たしかに。表示しない前提でめちゃ複雑な型が発生してる場面はありますね。

ショートカット押してる間だけ表示は、かなり DX （ Experience の方の）上がりそうだなぁ。一個ずつ表示めんどすぎるので。 (edited)

koher

これも、パラメトリックポリモーフィズムでネストした長大な型パラメータが出来上がりがちなSwiftだと辛いかも？ショートカットの間だけとかならありだと思う。

Minimap が command 押してるときだけ表示増えるという前例もあるし、良さそう (edited)

Minimap が commnad 押してるときだけ表示増える

ほんとだ！！

1

IDEが頑張る世界線は、Githubにも頑張って貰う必要がある

6:51 AM

MSがJetBrainsを買収するでFAかな

そのへん LSP もそうだし、なんかその推論出すやつも規格があるらしくて

6:52 AM

標準化してるからGitHubはビュー作るだけみたいな未来になりそう

それはいいね

1

6:53 AM

https://swift.org/gsoc2021/

Swift.org

Swift is a general-purpose programming language built using a modern approach to safety, performance, and software design patterns.

6:54 AM

In the project, the student will extend SourceKit-LSP to offer functionality as described in this LSP proposal.

それでもなお、trailing closureのラベル省略強制は失敗だったと思うなぁ

Rustがやったやつを、LSPでもできるように規格拡張するプロポーザルが出ているというステータスか

既にラベル省略するかどうかは_の有無で決定できていたのだから、それに従うで良かったはずなんだ

ラベルなしクロージャが適切なデザインのAPIでは空ラベルにしておいて

6:55 AM

ラベルありクロージャが適切ならラベルをつけておいて

6:55 AM

呼び出し側はそれに同期すればいいよね。

そうなんだよねぇ

ほんとだよなあ

Swiftの中でOptionalサブタイピングの次くらいにイケてないところだと思う

最初見たときはめっちゃかっこいい最新の仕様だと思ったんだけど

6:56 AM

別に省略を強制する文法である必要全く無いと思った (edited)

6:57 AM

通常の引数でもラベルは省略できないところもSwiftが他の言語に対して大きな特徴なのに

6:57 AM

Trailing Closureだけそのへんと一貫性がない

tarunon

Swiftの中でOptionalサブタイピングの次くらいにイケてないところだと思う

これってどうイケてないと感じるやつですか？

Optionalの話かな

Optionalとラップされた型にサブタイピング関係があることでどういうときに困るんでしたっけ？

なんか細かい闇がたくさんあったからまとめが欲しくなってきたな。

根本的にはOptionalがtagged unionであるということと、T?とTのサブタイピングを認めてかつTとUがサブタイピング関係があるときにT?とU?のサブタイピングも認める、ということをしちゃうと

7:15 AM

型理論に優先順位のルールを加えなきゃいけなくなるが、人間の認知はここまで追い付かないので

7:16 AM

文脈によってサブタイピングがあって欲しい場合とサブタイピングを認めたくない場合が混在してしまい

7:16 AM

人間はそれをバグと認知してしまう

7:16 AM

仕事終わったら詳しく書くか

tarunon

仕事終わったら詳しく書くか

https://discord.com/channels/291054398077927425/306995750418513920/821347439117074453 に書いた

@swift-4.0.3 var foo : () -> Int foo = { foo() }

exit status: 1 with stderr:

<stdin>:2:7: error: variable 'foo' captured by a closure before being initialized foo = { foo() } ^ <stdin>:1:5: note: variable defined here var foo : () -> Int ^

bot全滅中…

bot復帰

2:08 AM

DiscordがHTTPレスポンスのヘッダに Set-Cookie: … set-cookie: … を入れる様になり、使ってたライブラリ内で

 let headers = [String: Any](uniqueKeysWithValues: response.allHeaderFields.map { (($0.key as! String).lowercased(), $0.value) })

としてcase insensitive uniqueであることを期待してた箇所でランタイムエラーになってた。 (edited)

1

なるほど。やっぱりサーバーと連携する（アプリの外部で仕様が変わり得る）箇所で ! 使うのは危険ですね。

問題だったのは!の利用ではなく、init(uniqueKeysWithValues:)APIへ外部データがcase insensitive uniqueだと無邪気に信じて単純な変換のみで渡したことですね。

ああ、すいません、わかっていたはずなのですが、 unique でない → Logic Failure → ! みたいなステップで思考がバグってました。

1

3:13 AM

uniqueKeysWithValues に渡すものがおかしいのは Logic Failure でいいと思うんですが、ユニーク化のときにユニークでない場合に Recoverable なエラーハンドリングができる簡単な方法があるといいですよね。 uniqueKeysWithValues は割と踏みがちな気がするので・・・。

3:16 AM

guard let uniqueHeaderFields = response.allHeaderFields .map { (($0.key as! String).lowercased(), $0.value) } .unique(\.0) else { ... }

とか？

もっとシンプルに同じ値が積まれてることを期待しちゃって

3:17 AM

uniqueじゃ無い方を使えば良いと思いました

3:17 AM

この場合は特に

ああ、DarwinだとallHeaderFieldsがcase insensitiveなのか。

uniqueじゃ無い方を使えば良いと思いました

これは Dictionary.init の話ですか？

そうです

そんな init ありましたっけ？

3:19 AM

これ？ https://developer.apple.com/documentation/swift/dictionary/3127163-init

Dictionary.init(_:uniquingKeysWith:) (edited)

https://developer.apple.com/documentation/swift/dictionary/3127161-init

3:20 AM

こっちか

3:20 AM

おおお、これ知りませんでした。

3:20 AM

これいいですね。合成もできるしエラーにもできる。

3:20 AM

rethrows がめっちゃ活きてますね。

Darwinでの挙動を調べてみると、複数のSet-Cookieは[String]としてallHeaderFieldsに入るみたい。

4:26 AM

なので、ちゃんとやるとこんな感じになる。 @swift-5.0.3

import Foundation #if canImport(FoundationNetworking) import FoundationNetworking #endif guard let url = URL(string: "https://discordapp.com/api/v7/gateway/bot") else { exit(1) } let task = URLSession.shared.dataTask(with: url) { dataOrNil, responseOrNil, errorOrNil in guard let response = responseOrNil as? HTTPURLResponse else { exit(1) } let allHeaderFields = response.allHeaderFields.map { (key, value) in ((key as! String).lowercased(), value) } let headers = [String: Any](allHeaderFields, uniquingKeysWith: { (lhs, rhs) in switch (lhs, rhs) { case (let lhs as [String], let rhs as [String]): return lhs + rhs case (let lhs as [String], let rhs as String): return lhs + [rhs] case (let lhs as String, let rhs as [String]): return [lhs] + rhs case (let lhs as String, let rhs as String): return [lhs, rhs] default: return rhs } }) dump(headers) exit(0) } task.resume() dispatchMain()

(edited)

▿ 16 key/value pairs ▿ (2 elements) - key: "date" - value: "Tue, 13 Apr 2021 04:26:24 GMT" ▿ (2 elements) - key: "strict-transport-security" - value: "max-age=31536000; includeSubDomains" ▿ (2 elements) - key: "cf-ray" - value: "63f1ef9dbf553806-IAD" ▿ (2 elements) - key: "connection" - value: "keep-alive" ▿ (2 elements) - key: "cf-request-id" - value: "096b1416900000380660129000000001" ▿ (2 elements) - key: "cf-cache-status" - value: "DYNAMIC" ▿ (2 elements) - key: "via" - value: "1.1 google" ▿ (2 elements) - key: "content-length" - value: "43" ▿ (2 elements) - key: "expect-ct" - value: "max-age=604800, report-uri=\"https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct\"" ▿ (2 elements) - key: "report-to" - value: "{\"endpoints\":[{\"url\":\"https:\\/\\/a.nel.cloudflare.com\\/report?s=6nGtl8vxSfMGS4%2Fg8PcS6skF%2FlvqoTCQES4uLM5cC146gNRLzD%2FY8X%2BPide4V6MCz57kfNUXBY084%2BCGO3VO91oIQiMHHDyZNq6LzNs4kw%3D%3D\"}],\"group\":\"cf-nel\",\"max_age\":604800}" ▿ (2 elements) - key: "set-cookie" ▿ value: 2 elements - "__cfduid=d2062717f605ce464e7f88d444e655ede1618287984; expires=Thu, 13-May-21 04:26:24 GMT; path=/; domain=.discordapp.com; HttpOnly; SameSite=Lax" - "__dcfduid=8854356cde9c452195623d3534a3e91a; Expires=Thu, 13-May-2021 04:26:24 GMT; Max-Age=2592000; Secure; HttpOnly; Path=/" ▿ (2 elements) - key: "nel" - value: "{\"max_age\":604800,\"report_to\":\"cf-nel\"}" ▿ (2 elements) - key: "alt-svc" - value: "h3-27=\":443\"; ma=86400, h3-28=\":443\"; ma=86400, h3-29=\":443\"; ma=86400" ▿ (2 elements) - key: "x-envoy-upstream-service-time" - value: "5" ▿ (2 elements) - key: "server" - value: "cloudflare" ▿ (2 elements) - key: "content-type" - value: "application/json"

あとDarwinだとkeyの大文字小文字は最初に現れたものを維持するみたい。

1

@swift-5.3.3

struct Box<T> {} @_functionBuilder struct MyBuilder { static func buildBlock(_ component: Box<Never>) -> Box<Never> { component } } func take(_ c: () -> Box<Never>) {} func takeBuild(@MyBuilder _ c: () -> Box<Never>) {} take { Box() } takeBuild { Box() }

exit status: 1 with stderr:

<stdin>:19:5: error: cannot convert value of type 'Box<_>' to expected argument type 'Box<Never>' Box() ^ <stdin>:1:12: note: arguments to generic parameter 'T' ('_' and 'Never') are expected to be equal struct Box<T> {} ^ <stdin>:19:5: error: generic parameter 'T' could not be inferred Box() ^ <stdin>:1:12: note: 'T' declared as parameter to type 'Box' struct Box<T> {} ^ <stdin>:19:5: note: explicitly specify the generic arguments to fix this issue Box() ^ <Any>

@swift-5.3.3

struct Box<T> {} @_functionBuilder struct MyBuilder { static func buildExpression(_ expression: Box<Never>) -> Box<Never> { expression } static func buildBlock(_ component: Box<Never>) -> Box<Never> { component } } func take(_ c: () -> Box<Never>) {} func takeBuild(@MyBuilder _ c: () -> Box<Never>) {} func test() { take { Box() } takeBuild { Box() } }

no output

Iceman

@swift-5.3.3

struct Box<T> {} @_functionBuilder struct MyBuilder { static func buildBlock(_ component: Box<Never>) -> Box<Never> { component } } func take(_ c: () -> Box<Never>) {} func takeBuild(@MyBuilder _ c: () -> Box<Never>) {} take { Box() } takeBuild { Box() }

コンテキストで推論させたいときは、buildExpression(_:) が必要ですね。

おおできました！ありがとうございます

https://github.com/apple/swift-evolution/blob/main/proposals/0289-result-builders.md#result-building-methods

buildExpression(_ expression: Expression) -> Component is used to lift the results of expression-statements into the Component internal currency type. It is optional, but when provided it allows a result builder to distinguish Expression types from Component types or to provide contextual type information for statement-expressions.

expression入れたらflatMapの例も通るようになりました

他にも見たこと無いのあって面白い

今までボットを動かすHeroku用のアカウントを<メイン>+swift5.x@gmail.com的なGmailのエリアスアドレスでサインアップしてたけど、Swift 5.5ボット用に新規アカウントをサインアップしようとしたら、メールアドレスで弾かれた… なのでSwift 5.5ボット立ち上げは少し遅れそう。

2

5.5 の Release Process 、ブログじゃなくて↓こんなところにあったんですね。これはやっぱ 6 は今年は来ないのかな・・・。 https://forums.swift.org/t/swift-5-5-release-process/45644

Swift 5.5 Release Process

This post describes the release process, and estimated schedule for Swift 5.5. Snapshots of Swift 5.5 Downloadable snapshots of the Swift 5.5 release branch will be posted regularly as part of continuous integration testing. As support is available, snapshot downloads will be added for newly supported platforms. Once Swift 5.5 is released, the...

@swift-5.3.3 (["value": Int?(1)] as [String: String?])

exit status: 134 with stderr:

<stdin>:1:21: warning: coercion from '[String : Int?]' to '[String : String?]' may fail; use 'as?' or 'as!' instead (["value": Int?(1)] as [String: String?]) ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~ <stdin>:1:21: warning: expression of type '[String : String?]' is unused (["value": Int?(1)] as [String: String?]) ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~ SIL verification failed: branch argument types do not match arguments for dest bb: std::equal(BI->getArgs().begin(), BI->getArgs().end(), BI->getDestBB()->args_begin(), [&](SILValue branchArg, SILArgument *bbArg) { return verifyBranchArgs(branchArg, bbArg); }) Verifying instruction: %31 = enum $Optional<Int>, #Optional.some!enumelt, %30 : $Int // user: %32 -> br bb3(%31 : $Optional<Int>) // id: %32 In function: // main sil [ossa] @main : $@convention(c) (Int32, UnsafeMutablePointer<Optional<UnsafeMutablePointer<Int8>>>) -> Int32 { bb0(%0 : $Int32, %1 : $UnsafeMutablePointer<Optional<UnsafeMutablePointer<Int8>>>): %2 = integer_literal $Builtin.Word, 1 // user: %4 // function_ref _allocateUninitializedArray<A>(_:) %3 = function_ref @$ss27_allocateUninitializedArrayySayxG_BptBwlF : $@convention(thin) <τ_0_0> (Builtin.Word) -> (@owned Array<τ_0_0>, Builtin.RawPointer) // user: %4 %4 = apply %3<(String, Optional<String>)>(%2) : $@convention(thin) <τ_0_0> (Builtin.Word) -> (@owned Array<τ_0_0>, Builtin.RawPointer) // user: %5 (%5, %6) = destructure_tuple %4 : $(Array<(String, Optional<String>)>, Builtin.RawPointer) // users: %40, %7 %7 = pointer_to_address %6 : $Builtin.RawPointer to [strict] $*(String, Optional<String>) // users: %9, %8 %8 = tuple_element_addr %7 : $*(String, Optional<String>), 0 // user: %16 %9 = tuple_element_addr %7 : $*(String, Optional<String>), 1 // user: %36 %10 = string_literal utf8 "value" // user: %15 %11 = integer_literal $Builtin.Word, 5 // user: %15 %12 = integer_literal $Builtin.I

@swift-5.3.3 _ = ["value": Int?(1)] as [String: String?]

exit status: 134 with stderr:

<stdin>:1:24: warning: coercion from '[String : Int?]' to '[String : String?]' may fail; use 'as?' or 'as!' instead _ = ["value": Int?(1)] as [String: String?] ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~ SIL verification failed: branch argument types do not match arguments for dest bb: std::equal(BI->getArgs().begin(), BI->getArgs().end(), BI->getDestBB()->args_begin(), [&](SILValue branchArg, SILArgument *bbArg) { return verifyBranchArgs(branchArg, bbArg); }) Verifying instruction: %31 = enum $Optional<Int>, #Optional.some!enumelt, %30 : $Int // user: %32 -> br bb3(%31 : $Optional<Int>) // id: %32 In function: // main sil [ossa] @main : $@convention(c) (Int32, UnsafeMutablePointer<Optional<UnsafeMutablePointer<Int8>>>) -> Int32 { bb0(%0 : $Int32, %1 : $UnsafeMutablePointer<Optional<UnsafeMutablePointer<Int8>>>): %2 = integer_literal $Builtin.Word, 1 // user: %4 // function_ref _allocateUninitializedArray<A>(_:) %3 = function_ref @$ss27_allocateUninitializedArrayySayxG_BptBwlF : $@convention(thin) <τ_0_0> (Builtin.Word) -> (@owned Array<τ_0_0>, Builtin.RawPointer) // user: %4 %4 = apply %3<(String, Optional<String>)>(%2) : $@convention(thin) <τ_0_0> (Builtin.Word) -> (@owned Array<τ_0_0>, Builtin.RawPointer) // user: %5 (%5, %6) = destructure_tuple %4 : $(Array<(String, Optional<String>)>, Builtin.RawPointer) // users: %40, %7 %7 = pointer_to_address %6 : $Builtin.RawPointer to [strict] $*(String, Optional<String>) // users: %9, %8 %8 = tuple_element_addr %7 : $*(String, Optional<String>), 0 // user: %16 %9 = tuple_element_addr %7 : $*(String, Optional<String>), 1 // user: %36 %10 = string_literal utf8 "value" // user: %15 %11 = integer_literal $Builtin.Word, 5 // user: %15 %12 = integer_literal $Builtin.Int1, -1 // user: %15 %13 = metatype $@thin String.Type // user: %15 // function_ref String.init(_builtinStringLiteral:utf8Cod

@swift-5.2.5 @swift-5.4.3 @swift-main _ = ["value": Int?(1)] as [String: String?]

exit status: 134 with stderr:

<stdin>:1:24: warning: coercion from '[String : Int?]' to '[String : String?]' may fail; use 'as?' or 'as!' instead _ = ["value": Int?(1)] as [String: String?] ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~ SIL verification failed: branch argument types do not match arguments for dest bb: std::equal(BI->getArgs().begin(), BI->getArgs().end(), BI->getDestBB()->args_begin(), [&](SILValue branchArg, SILArgument *bbArg) { return verifyBranchArgs(branchArg, bbArg); }) Verifying instruction: %31 = enum $Optional<Int>, #Optional.some!enumelt, %30 : $Int // user: %32 -> br bb3(%31 : $Optional<Int>) // id: %32 In function: // main sil [ossa] @main : $@convention(c) (Int32, UnsafeMutablePointer<Optional<UnsafeMutablePointer<Int8>>>) -> Int32 { bb0(%0 : $Int32, %1 : $UnsafeMutablePointer<Optional<UnsafeMutablePointer<Int8>>>): %2 = integer_literal $Builtin.Word, 1 // user: %4 // function_ref _allocateUninitializedArray<A>(_:) %3 = function_ref @$ss27_allocateUninitializedArrayySayxG_BptBwlF : $@convention(thin) <τ_0_0> (Builtin.Word) -> (@owned Array<τ_0_0>, Builtin.RawPointer) // user: %4 %4 = apply %3<(String, Optional<String>)>(%2) : $@convention(thin) <τ_0_0> (Builtin.Word) -> (@owned Array<τ_0_0>, Builtin.RawPointer) // user: %5 (%5, %6) = destructure_tuple %4 : $(Array<(String, Optional<String>)>, Builtin.RawPointer) // users: %38, %7 %7 = pointer_to_address %6 : $Builtin.RawPointer to [strict] $*(String, Optional<String>) // users: %9, %8 %8 = tuple_element_addr %7 : $*(String, Optional<String>), 0 // user: %16 %9 = tuple_element_addr %7 : $*(String, Optional<String>), 1 // user: %36 %10 = string_literal utf8 "value" // user: %15 %11 = integer_literal $Builtin.Word, 5 // user: %15 %12 = integer_literal $Builtin.Int1, -1 // user: %15 %13 = metatype $@thin String.Type // user: %15 // function_ref String.init(_builtinStringLiteral:utf8Cod

exit status: 1 with stderr:

<stdin>:1:15: error: cannot convert value of type 'Optional<Int>' to expected dictionary value type 'String' _ = ["value": Int?(1)] as [String: String?] ^

exit status: 134 with stderr:

<stdin>:1:24: warning: coercion from '[String : Int?]' to '[String : String?]' may fail; use 'as?' or 'as!' instead _ = ["value": Int?(1)] as [String: String?] ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~ SIL verification failed: branch argument types do not match arguments for dest bb: std::equal(BI->getArgs().begin(), BI->getArgs().end(), BI->getDestBB()->args_begin(), [&](SILValue branchArg, SILArgument *bbArg) { return verifyBranchArgs(branchArg, bbArg); }) Verifying instruction: %31 = enum $Optional<Int>, #Optional.some!enumelt, %30 : $Int // user: %32 -> br bb3(%31 : $Optional<Int>) // id: %32 In function: // main sil [ossa] @main : $@convention(c) (Int32, UnsafeMutablePointer<Optional<UnsafeMutablePointer<Int8>>>) -> Int32 { bb0(%0 : $Int32, %1 : $UnsafeMutablePointer<Optional<UnsafeMutablePointer<Int8>>>): %2 = integer_literal $Builtin.Word, 1 // user: %4 // function_ref _allocateUninitializedArray<A>(_:) %3 = function_ref @$ss27_allocateUninitializedArrayySayxG_BptBwlF : $@convention(thin) <τ_0_0> (Builtin.Word) -> (@owned Array<τ_0_0>, Builtin.RawPointer) // user: %4 %4 = apply %3<(String, Optional<String>)>(%2) : $@convention(thin) <τ_0_0> (Builtin.Word) -> (@owned Array<τ_0_0>, Builtin.RawPointer) // user: %5 (%5, %6) = destructure_tuple %4 : $(Array<(String, Optional<String>)>, Builtin.RawPointer) // users: %38, %7 %7 = pointer_to_address %6 : $Builtin.RawPointer to [strict] $*(String, Optional<String>) // users: %9, %8 %8 = tuple_element_addr %7 : $*(String, Optional<String>), 0 // user: %16 %9 = tuple_element_addr %7 : $*(String, Optional<String>), 1 // user: %36 %10 = string_literal utf8 "value" // user: %15 %11 = integer_literal $Builtin.Word, 5 // user: %15 %12 = integer_literal $Builtin.Int1, -1 // user: %15 %13 = metatype $@thin String.Type // user: %15 // function_ref String.init(_builtinStringLiteral:utf8Cod

なんか壊れてるな

キャスト周りをResultBuilderに噛ませると壊れるの観測してたけど、関係なく壊れてるのね

秘孔だ

こんなバグがまだ見つかるんですねえ

@swift-5.3.3 @swift-5.4.3 class MyCls {} let obj: MyCls = { obj }() print(obj)

exit status: 1 with stderr:<stdin>:2:20: error: variable used within its own initial value let obj: MyCls = { obj }() ^

exit status: 11 with stderr:

Please submit a bug report (https://swift.org/contributing/#reporting-bugs) and include the project and the crash backtrace. Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -I /Libraries/.build/x86_64-unknown-linux-gnu/debug -module-cache-path /Libraries/.build/x86_64-unknown-linux-gnu/debug/ModuleCache -D DEBUG -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOSHA1.build/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/swift-nio/Sources/CNIOSHA1/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOHTTPParser.build/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/swift-nio/Sources/CNIOHTTPParser/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOAtomics.build/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/swift-nio/Sources/CNIOAtomics/include -Xcc -fmodule-map-file=/Libraries/.build/checkouts/swift-nio/Sources/CNIOWindows/include/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/swift-nio/Sources/CNIOWindows/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIODarwin.build/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/swift-nio/Sources/CNIODarwin/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOLinux.build/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/swift-nio/Sources/CNIOLinux/include -module-name main -lLibraries 1. Swift version 5.4 (swift-5.4-RELEASE) 2. While running us

あらま

1:27 AM

謎のデグレ

1:27 AM

普通にテストケースありそうなシンプルなパターンなのに。

@swift-5.4.3 @swift-main enum E: Codable { case a(Int) }

exit status: 1 with stderr:

<stdin>:1:6: error: type 'E' does not conform to protocol 'Decodable' enum E: Codable { ^ <stdin>:1:6: error: type 'E' does not conform to protocol 'Encodable' enum E: Codable { ^ Swift.Decodable:2:5: note: protocol requires initializer 'init(from:)' with type '(from: Decoder)' init(from decoder: Decoder) throws ^ Swift.Encodable:2:10: note: protocol requires function 'encode(to:)' with type '(Encoder) throws -> ()' func encode(to encoder: Encoder) throws ^

no output

5.5 development snapshot 使ってもSE-0295使えなかったんだけど

12:47 AM

https://github.com/apple/swift/pull/34855/commits

[Sema]: Add Codable synthesis for enums with associated values by d...

This pull request adds Codable synthesis for enums with associated values.

12:47 AM

release/5.5 ブランチにこれがマージ済みかどうかってGitHubでどうやって調べればいいんだろう

12:48 AM

https://github.com/apple/swift/pull/36592

[Frontend] Remove enable-experimental-enum-codable-derivation flag ...

SE-295 has been accepted, so we don't need to hide the feature behind a flag anymore.

12:48 AM

む

両方 release/5.5 に入ってそう

あれー？

12:51 AM

これでいいんでしたっけ

https://github.com/apple/swift/commit/c03c3b266d411481d81a86d1591aa96ab1bfbcd7 のタグリストに、swift-5.5-DEVELOPMENT-SNAPSHOT-2021-06-02-a あるのでいけると思うんですが・・・

Merge pull request #36592 from drexin/wip-remove-codable-enum-flag ...

[Frontend] Remove enable-experimental-enum-codable-derivation flag

あ、いけた、わかった

12:54 AM

xcodeが裏で立ててる？lldbが切り替わってなくて壊れたっぽかった

12:54 AM

ビルドはできるけどエディタでエラーが出てて実行するとlldbなんちゃらかんちゃらって謎のエラーが出てた

1

12:54 AM

失礼しました

release/5.5 ブランチにこれがマージ済みかどうかってGitHubでどうやって調べればいいんだろう

github じゃないけど git branch -a --contains c03c3b266d411481d81a86d1591aa96ab1bfbcd7 | grep release/5.5 とかですかね

gitでやるのが早いか。固定回線がいまなくて渋ってました。

12:57 AM

--contains というのがあるんすね。

12:57 AM

ビルドはできるけど実行できないや Xcode12.5とswift5.5の何かが噛み合わないっぽいな

1:02 AM

[omochi@omochi-iMacPro Sandbox]$ swift --version Apple Swift version 5.5-dev (LLVM 32757f073852da0, Swift 976d23d3f72d24b) Target: x86_64-apple-macosx11.0 [omochi@omochi-iMacPro Sandbox]$ swift main.swift Killed: 9 [omochi@omochi-iMacPro Sandbox]$ swift dyld: Library not loaded: @rpath/Python3.framework/Versions/3.8/Python3 Referenced from: /Library/Developer/Toolchains/swift-5.5-DEVELOPMENT-SNAPSHOT-2021-06-02-a.xctoolchain/System/Library/PrivateFrameworks/LLDB.framework/Versions/A/LLDB Reason: image not found Abort trap: 6

1:03 AM

同梱されてるLLDBがPython3.8に依存してる？

うーん公式のPython3.8を入れてみたけど

1:28 AM

/Library/Frameworks/Python.framework で、 Python3.framework じゃない。

Load command 27 cmd LC_RPATH cmdsize 80 path /Applications/Xcode.app/Contents/Developer/Library/Frameworks/ (offset 12)

1:43 AM

[omochi@omochi-iMacPro Library]$ ls /Applications/Xcode12.5.app/Contents/Developer/Library/Frameworks | grep Python3 Python3.framework

1:43 AM

なるほど。

Xcode.app -> Xcode12.5.app 置いたけどまだ駄目だ

1:50 AM

[omochi@omochi-iMacPro Sandbox]$ swift error: failed to launch REPL process: process exited with status -1 (attach failed (Not allowed to attach to process. Look in the console messages (Console.app), near the debugserver entries when the attached failed. The subsystem that denied the attach permission will likely have logged an informative message about why it was denied.))

1:51 AM

Xcodeからは実行できるようになった・・・

@swift-main

import Foundation enum E: Codable { case a(Int?) } let encoder = JSONEncoder() encoder.outputFormatting = .prettyPrinted let json = try encoder.encode(E.a(nil)) print(String(data: json, encoding: .utf8)!)

{ "a" : { } }

あーやっぱそうなんか。 (edited)

@swift-main

import Foundation enum E: Codable { case a(Int??) } let encoder = JSONEncoder() encoder.outputFormatting = .prettyPrinted let json = try encoder.encode(E.a(.some(.none))) print(String(data: json, encoding: .utf8)!)

{ "a" : { "_0" : null } }

うぇえぇ

意図した挙動なんだろうか

一応こうなってると、 .some(.some(1)) .some(.none) .none のどれもが異なるJSONになるので、

4:49 PM

デコードできていい・・・？　ほんとか？デコード側どうなんだろう

3重以上になったらどうなるのかなあ。

たしかに！ｗ

4:50 PM

@swift-main

import Foundation enum E: Codable { case a(Int???) } let encoder = JSONEncoder() encoder.outputFormatting = .prettyPrinted let value: [E] = [ .a(.none), .a(.some(.none)), .a(.some(.some(.none))), .a(.some(.some(.some(1)))) ] let json = try encoder.encode(value) print(String(data: json, encoding: .utf8)!)

(edited)

exit status: 1 with stderr:

<stdin>:10:6: error: enum case 'a' cannot be used as an instance member .a(.none) ~^~~~~~~~ E <stdin>:11:6: error: enum case 'a' cannot be used as an instance member .a(.some(.none)) ~~~~~^~~~~~~~~~~~~~~ E <stdin>:12:6: error: enum case 'a' cannot be used as an instance member .a(.some(.some(.none))) ~~~~~^~~~~~~~~~~~~~~~~~~~~~ E

@swift-main

import Foundation enum E: Codable { case a(Int???) } let encoder = JSONEncoder() encoder.outputFormatting = .prettyPrinted let value: [E] = [ .a(.none), .a(.some(.none)), .a(.some(.some(.none))), .a(.some(.some(.some(1)))) ] let json = try encoder.encode(value) print(String(data: json, encoding: .utf8)!)

[ { "a" : { } }, { "a" : { "_0" : null } }, { "a" : { "_0" : null } }, { "a" : { "_0" : 1 } } ]

元の型が2重または3重オプショナルの場合エンコード結果から元の型はわからないけどそれは問題ないんですよね？

型のほうは case名のキーの a で残ってるんでいいのです

まあそうか。オプショナルは元々のEnum含まない使用でも広く受けることできますしね。

一番外側の none はキーレス、一番内側のsomeは値、その中間レベルの .some の中の .none は全部 null につぶれてしまうようだ。

4:53 PM

中間の null は正しくデコードできるのか・・・？

4:55 PM

@swift-main

import Foundation enum E: Codable { case a(Int???) } let decoder = JSONDecoder() let json = """ [ { "a" : { } }, { "a" : { "_0" : null } }, { "a" : { "_0" : null } }, { "a" : { "_0" : 1 } } ] """.data(using: .utf8)! let value = try decoder.decode([E].self, from: json) dump(value)

▿ 4 elements ▿ main.E.a - a: nil ▿ main.E.a - a: nil ▿ main.E.a - a: nil ▿ main.E.a ▿ a: Optional(Optional(Optional(1))) ▿ some: Optional(Optional(1)) ▿ some: Optional(1) - some: 1

駄目だな。デコード側はキーレスとキー有りのnullの区別もできない。

4:56 PM

エンコード側は３種類の出力があるけどデコードは２種類（最も外側noneと最も内側some)しか扱えないと。

意図した挙動じゃない気がしますねえ。

4:56 PM

エンコードのほう。

4:57 PM

キーがあるnilで良さそうですけどキーがないほうが自然ですか？

4:57 PM

私の印象はパッと見ての印象だから違うかもしれない。

codableってそうなんですよね、キーも出さない

4:59 PM

SE-0295のenumのassoc valueのoptionalの扱いについては文書で触れてないけど、 (edited)

なるほど。もともとのCodableはnilのときキーごと消すんでしたか。

5:01 PM

まあそうすると "_0" : null はnullという値があるっていう表現になるから合ってるのか。

5:01 PM

まあJSONの仕様を超えてるし難しいところだ。

https://github.com/apple/swift-evolution/tree/master/proposals

apple/swift-evolution

This maintains proposals for changes and user-visible enhancements to the Swift Programming Language. - apple/swift-evolution

5:02 PM

うーん、Codable自動実装のプロポーザルどれだ？

5:03 PM

https://github.com/apple/swift-evolution/blob/master/proposals/0166-swift-archival-serialization.md

apple/swift-evolution

This maintains proposals for changes and user-visible enhancements to the Swift Programming Language. - apple/swift-evolution

5:03 PM

最初からあったのか。

5:04 PM

うーん、SE-0166に明確な言及は無い気がする・・・ｗ

5:33 PM

できた。ちょっと実装がむずかった。

@swift-main struct A { let i: Int } struct B { let a: A? = nil } let _: [Any] = [B()].compactMap(\.a?.i)

exit status: 1 with stderr:<stdin>:2:1: error: extraneous '}' at top level } ^ <stdin>:4:10: error: cannot find type 'A' in scope let a: A? = nil ^

@swift-main struct A { let i: Int } struct B { let a: A? = nil } let _: [Any] = [B()].compactMap(\.a?.i)

exit status: 134 with stderr:

swift-frontend: /home/buildnode/jenkins/workspace/oss-swift-package-linux-ubuntu-16_04/swift/lib/Sema/CSApply.cpp:4968: swift::Expr *(anonymous namespace)::ExprRewriter::visitKeyPathExpr(swift::KeyPathExpr *): Assertion `leafTy->getOptionalObjectType()->isEqual( componentTy->getWithoutSpecifierType())' failed. Please submit a bug report (https://swift.org/contributing/#reporting-bugs) and include the project and the crash backtrace. Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -I /Libraries/.build/x86_64-unknown-linux-gnu/debug -module-cache-path /Libraries/.build/x86_64-unknown-linux-gnu/debug/ModuleCache -D DEBUG -new-driver-path /usr/bin/swift-driver -resource-dir /usr/lib/swift -Xllvm -enable-swifttailcc-musttail-check -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOSHA1.build/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/swift-nio/Sources/CNIOSHA1/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOHTTPParser.build/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/swift-nio/Sources/CNIOHTTPParser/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOAtomics.build/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/swift-nio/Sources/CNIOAtomics/include -Xcc -fmodule-map-file=/Libraries/.build/checkouts/swift-nio/Sources/CNIOWindows/include/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/swift-nio/Sources/CNIOWindows/include -Xcc -fmodule-map-file=/Libraries/

ふむ

@swift-main

@propertyWrapper struct Wrapper<T> { init(wrappedValue: T) { self.wrappedValue = wrappedValue } init(projectedValue: Self) { self.wrappedValue = projectedValue.wrappedValue } var wrappedValue: T var projectedValue: Self { return self } } let useWrapper: (Wrapper<Int>) -> Void = { $$0 in print($$0) print(_$0) }

no output

~~これがコンパイル通るのって正しいんでしょうか~~ 変数名に$が使えるのか (edited)

@swift-main protocol P1 {} protocol P2 { associatedtype X: P1 = Int }

no output

IntはP1にconformしないのでXのデフォルト値として常に成り立たないんだけど、デフォルト値の宣言の時点ではエラーにならない

11:04 AM

例えばP1がpublicかつ外部モジュールで extension Int: P1 {} された場合、 X: P1 が成り立つケースはあるがinternalな場合はエラーでいい気がする

@swift-5.3.3 @swift-5.4.3 @swift-main func f() { var a: Int? = 1 guard let a = a else { return } _ = a + 1 }

stderr:<stdin>:2:7: warning: variable 'a' was never mutated; consider changing to 'let' constant var a: Int? = 1 ~~~ ^ let

exit status: 1 with stderr:

<stdin>:3:13: error: definition conflicts with previous value guard let a = a else { return } ^ <stdin>:2:7: note: previous definition of 'a' is here var a: Int? = 1 ^ <stdin>:4:7: error: value of optional type 'Int?' must be unwrapped to a value of type 'Int' _ = a + 1 ^ <stdin>:4:7: note: coalesce using '??' to provide a default when the optional value contains 'nil' _ = a + 1 ^ ?? <#default value#> <stdin>:4:7: note: force-unwrap using '!' to abort execution if the optional value contains 'nil' _ = a + 1 ^ !

stderr:<stdin>:2:7: warning: variable 'a' was never mutated; consider changing to 'let' constant var a: Int? = 1 ~~~ ^ let

@swift-5.3.3 @swift-5.4.3 @swift-main func f() { var a = 1 var a = 1 }

exit status: 1 with stderr:<stdin>:3:7: error: invalid redeclaration of 'a' var a = 1 ^ <stdin>:2:7: note: 'a' previously declared here var a = 1 ^

exit status: 1 with stderr:

<stdin>:3:7: error: definition conflicts with previous value var a = 1 ^ <stdin>:2:7: note: previous definition of 'a' is here var a = 1 ^ <stdin>:2:7: warning: initialization of variable 'a' was never used; consider replacing with assignment to '_' or removing it var a = 1 ~~~~^ _ <stdin>:3:7: warning: initialization of variable 'a' was never used; consider replacing with assignment to '_' or removing it var a = 1 ~~~~^ _

exit status: 1 with stderr:<stdin>:3:7: error: invalid redeclaration of 'a' var a = 1 ^ <stdin>:2:7: note: 'a' previously declared here var a = 1 ^

Swift5.4からローカル変数をguardでshadowできるの知らなかった。

@swift-main

import Foundation enum Foo: String, Codable { case bar = "bar" } let data = try! JSONEncoder().encode(Foo.bar) let string = String(data: data, encoding: .utf8)! print(string)

"bar"

@swift-main

import Foundation enum Foo: Codable { case bar } let data = try! JSONEncoder().encode(Foo.bar) let string = String(data: data, encoding: .utf8)! print(string)

{"bar":{}}

うむ (edited)

@swift-5.0.3 @swift-5.1.5 @swift-5.2.5 @swift-5.3.3 @swift-5.4.3 func test(_ callback: () -> Void) { let x = callback x() } https://forums.swift.org/t/an-odd-error-escaping-closure-captures-mutating-self/50118/10 (edited)

no output

exit status: 1 with stderr:

<stdin>:2:13: error: non-escaping parameter 'callback' may only be called let x = callback ^ <stdin>:1:11: note: parameter 'callback' is implicitly non-escaping func test(_ callback: () -> Void) { ^ @escaping

no output

@swift-5.4.3 import CoreFoundation print(CFSwapInt16HostToBig)

(Function)

@swift-5.4.3 import Foundation print(CFSwapInt16HostToBig)

exit status: 1 with stderr:<stdin>:2:7: error: cannot find 'CFSwapInt16HostToBig' in scope print(CFSwapInt16HostToBig) ^~~~~~~~~~~~~~~~~~~~

@swift-main

import Foundation enum A: Hashable { case unix(path: Swift.String) @available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *) case url(_: URL) @available(macOS 12.0, iOS 15.0, watchOS 8.0, tvOS 15.0, *) case srv(_: Swift.String) }

no output

@swift-main

struct Test { func left() async -> String { "l" } func right() async -> String { "r" } func test() async { async let (l, r) = (left(), right()) print(await l) print(await r) } }

exit status: 1 with stderr:

<stdin>:6:9: error: 'async' modifier is only valid when experimental concurrency is enabled async let (l, r) = (left(), right()) ^ <stdin>:8:15: warning: no 'async' operations occur within 'await' expression print(await l) ^ <stdin>:9:15: warning: no 'async' operations occur within 'await' expression print(await r) ^ <stdin>:6:28: error: expression is 'async' but is not marked with 'await' async let (l, r) = (left(), right()) ^~~~~~~~~~~~~~~~~ await <stdin>:6:29: note: call is 'async' async let (l, r) = (left(), right()) ^ <stdin>:6:37: note: call is 'async' async let (l, r) = (left(), right()) ^

@swift-main

import Foundation struct LoggedInState {} struct LoggedOutState {} let date1 = Date() let date2 = Date() enum Permission: Equatable { case freeDuring(Range<Date>) case free case subscriberOnly } print(enumTag(Permission.freeDuring(date1 ..< date2))) print(enumTag(Permission.free)) print(enumTag(Permission.subscriberOnly)) private func enumTag<Case>(_ `case`: Case) -> UInt32? { let metadataPtr = unsafeBitCast( type(of: `case`), to: UnsafeRawPointer.self ) let kind = metadataPtr.load(as: Int.self) let isEnumOrOptional = kind == 0x201 || kind == 0x202 guard isEnumOrOptional else { return nil } let vwtPtr = (metadataPtr - MemoryLayout<UnsafeRawPointer>.size) .load(as: UnsafeRawPointer.self) let vwt = vwtPtr.load(as: EnumValueWitnessTable.self) return withUnsafePointer(to: `case`) { vwt.getEnumTag($0, metadataPtr) } } private struct EnumValueWitnessTable { let f1, f2, f3, f4, f5, f6, f7, f8: UnsafeRawPointer let f9, f10: Int let f11, f12: UInt32 let getEnumTag: @convention(c) (UnsafeRawPointer, UnsafeRawPointer) -> UInt32 let f13, f14: UnsafeRawPointer }

(edited)

stderr:

<stdin>:14:1: warning: result of call to 'enumTag' is unused enumTag(Permission.freeDuring(date1 ..< date2)) ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ <stdin>:15:1: warning: result of call to 'enumTag' is unused enumTag(Permission.free) ^ ~~~~~~~~~~~~~~~~~ <stdin>:16:1: warning: result of call to 'enumTag' is unused enumTag(Permission.subscriberOnly) ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~

@swift-main

import Foundation struct LoggedInState {} struct LoggedOutState {} let date1 = Date() let date2 = Date() enum Permission: Equatable { case freeDuring(Range<Date>) case free case subscriberOnly } print(enumTag(Permission.freeDuring(date1 ..< date2))) print(enumTag(Permission.free)) print(enumTag(Permission.subscriberOnly)) private func enumTag<Case>(_ `case`: Case) -> UInt32? { let metadataPtr = unsafeBitCast( type(of: `case`), to: UnsafeRawPointer.self ) let kind = metadataPtr.load(as: Int.self) let isEnumOrOptional = kind == 0x201 || kind == 0x202 guard isEnumOrOptional else { return nil } let vwtPtr = (metadataPtr - MemoryLayout<UnsafeRawPointer>.size) .load(as: UnsafeRawPointer.self) let vwt = vwtPtr.load(as: EnumValueWitnessTable.self) return withUnsafePointer(to: `case`) { vwt.getEnumTag($0, metadataPtr) } } private struct EnumValueWitnessTable { let f1, f2, f3, f4, f5, f6, f7, f8: UnsafeRawPointer let f9, f10: Int let f11, f12: UInt32 let getEnumTag: @convention(c) (UnsafeRawPointer, UnsafeRawPointer) -> UInt32 let f13, f14: UnsafeRawPointer }

Optional(0) Optional(1) Optional(2)stderr:

<stdin>:14:7: warning: expression implicitly coerced from 'UInt32?' to 'Any' print(enumTag(Permission.freeDuring(date1 ..< date2))) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ <stdin>:14:7: note: provide a default value to avoid this warning print(enumTag(Permission.freeDuring(date1 ..< date2))) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ?? <#default value#> <stdin>:14:7: note: force-unwrap the value to avoid this warning print(enumTag(Permission.freeDuring(date1 ..< date2))) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ! <stdin>:14:7: note: explicitly cast to 'Any' with 'as Any' to silence this warning print(enumTag(Permission.freeDuring(date1 ..< date2))) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ as Any <stdin>:15:7: warning: expression implicitly coerced from 'UInt32?' to 'Any' print(enumTag(Permission.free)) ^~~~~~~~~~~~~~~~~~~~~~~~ <stdin>:15:7: note: provide a default value to avoid this warning print(enumTag(Permission.free)) ^~~~~~~~~~~~~~~~~~~~~~~~ ?? <#default value#> <stdin>:15:7: note: force-unwrap the value to avoid this warning print(enumTag(Permission.free)) ^~~~~~~~~~~~~~~~~~~~~~~~ ! <stdin>:15:7: note: explicitly cast to 'Any' with 'as Any' to silence this warning print(enumTag(Permission.free)) ^~~~~~~~~~~~~~~~~~~~~~~~ as Any <stdin>:16:7: warning: expression implicitly coerced from 'UInt32?' to 'Any' print(enumTag(Permission.subscriberOnly)) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ <stdin>:16:7: note: provide a default value to avoid this warning print(enumTag(Permission.subscriberOnly)) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ?? <#defau

@swift-main

import Foundation struct LoggedInState {} struct LoggedOutState {} let date1 = Date() let date2 = Date() enum Permission: Equatable { case freeDuring(Range<Date>) case free case subscriberOnly } print(enumTag(Permission.freeDuring(date1 ..< date2))!) print(enumTag(Permission.free)!) print(enumTag(Permission.subscriberOnly)!) private func enumTag<Case>(_ `case`: Case) -> UInt32? { let metadataPtr = unsafeBitCast( type(of: `case`), to: UnsafeRawPointer.self ) let kind = metadataPtr.load(as: Int.self) let isEnumOrOptional = kind == 0x201 || kind == 0x202 guard isEnumOrOptional else { return nil } let vwtPtr = (metadataPtr - MemoryLayout<UnsafeRawPointer>.size) .load(as: UnsafeRawPointer.self) let vwt = vwtPtr.load(as: EnumValueWitnessTable.self) return withUnsafePointer(to: `case`) { vwt.getEnumTag($0, metadataPtr) } } private struct EnumValueWitnessTable { let f1, f2, f3, f4, f5, f6, f7, f8: UnsafeRawPointer let f9, f10: Int let f11, f12: UInt32 let getEnumTag: @convention(c) (UnsafeRawPointer, UnsafeRawPointer) -> UInt32 let f13, f14: UnsafeRawPointer }

0 1 2

@swift-5.4.3

@propertyWrapper struct Wrapper { var wrappedValue: Int? init(wrappedValue: Int?) { self.wrappedValue = wrappedValue } } class Test { @Wrapper var foo: Int? init() { self.foo = foo } }

no output

@swift-main print("スウィフト".lowercased())

スウィフト

@swift-5.4.3

import Foundation let numberFormatter: NumberFormatter = { let f = NumberFormatter() f.numberStyle = .decimal f.usesGroupingSeparator = true return f }() print(numberFormatter.string(from: .init(value: 1000)))

(edited)

exit status: 1 with stderr:

<stdin>:1:22: error: cannot find type 'NumberFormatter' in scope let numberFormatter: NumberFormatter = { ^~~~~~~~~~~~~~~ <stdin>:8:37: error: cannot infer contextual base in reference to member 'init' print(numberFormatter.string(from: .init(value: 1000))) ~^~~~

@swift-5.4.3

import Foundation import CoreFoundation let numberFormatter: NumberFormatter = { let f = NumberFormatter() f.numberStyle = .decimal f.usesGroupingSeparator = true return f }() print(numberFormatter.string(from: .init(value: 1000)))

(edited)

exit status: 1 with stderr:

<stdin>:3:22: error: cannot find type 'NumberFormatter' in scope let numberFormatter: NumberFormatter = { ^~~~~~~~~~~~~~~ <stdin>:10:37: error: cannot infer contextual base in reference to member 'init' print(numberFormatter.string(from: .init(value: 1000))) ~^~~~

あれ、NumberFormatter無いんでしたっけ

いや、いるらしいです。Botに何故か居ないのは謎https://swiftfiddle.com/rr4cuzgkcfe3jjxhlejmnkscna

Swift Online Playground

SwiftFiddle is an online playground for creating, sharing and embedding Swift fiddles (little Swift programs that run directly in your browser).

謎だ

NumberFormatterってFoundationじゃないですか？

8:56 AM

https://github.com/apple/swift-corelibs-foundation/blob/eec4b26deee34edb7664ddd9c1222492a399d122/Sources/Foundation/NumberFormatter.swift と思ったけどいますね

apple/swift-corelibs-foundation

The Foundation Project, providing core utilities, internationalization, and OS independence - apple/swift-corelibs-foundation

8:57 AM

あ、よく見たら試していたなんでもないです

そうそう、実装もあるように見えるんですけどねえ

BotとSwiftfiddleの (edited)

9:06 AM

違いは実行の仕方だな。Swiftfiddleはswift file.swiftで実行してるけどBotは一度実行ファイルを作ってるはず。

@swift-5.4.3

import Foundation import CoreFoundation let numberFormatter: NumberFormatter = { let f = NumberFormatter() f.numberStyle = .decimal f.usesGroupingSeparator = true return f }() print(numberFormatter.string(from: .init(value: 1000)))

Optional("1,000")stderr:

<stdin>:11:7: warning: expression implicitly coerced from 'String?' to 'Any' print(numberFormatter.string(from: .init(value: 1000))) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ <stdin>:11:23: note: provide a default value to avoid this warning print(numberFormatter.string(from: .init(value: 1000))) ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ?? <#default value#> <stdin>:11:23: note: force-unwrap the value to avoid this warning print(numberFormatter.string(from: .init(value: 1000))) ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ! <stdin>:11:23: note: explicitly cast to 'Any' with 'as Any' to silence this warning print(numberFormatter.string(from: .init(value: 1000))) ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ as Any

あれ動いてる、何が違ったんですか？

わかんない

www

コピペしただけなんですけどね

Kishikawa Katsumi

違いは実行の仕方だな。Swiftfiddleはswift file.swiftで実行してるけどBotは一度実行ファイルを作ってるはず。

実行ファイルは作っていません。ソースコードをswift -への標準入力として渡してます。 (edited)

あら、そうでしたか。すみません。勘違いです。じゃあ前に違いがある話が出たのは私が作ったBotとの違いかな？

swift54ボットのインスタンスも午前3:55に再起動したきり起動しっぱなし。何が違ったのか…

11:13 AM

あー、ボットへのメンションが含まれたメッセージが編集された後、ボットからの返答を更新するのに失敗してるぽい。

11:14 AM

@swift-5.4.3

import Foundation import CoreFoundation let numberFormatter: NumberFormatter = { let f = NumberFormatter() f.numberStyle = .decimal f.usesGroupingSeparator = true return f }() print(numberFormatter.string(from: .init(value: 1000)))

(edited)

exit status: 1 with stderr:

<stdin>:3:22: error: cannot find type 'NumberFormatter' in scope let numberFormatter: NumberFormatter = { ^~~~~~~~~~~~~~~ <stdin>:10:37: error: cannot infer contextual base in reference to member 'init' print(numberFormatter.string(from: .init(value: 1000))) ~^~~~

^コンパイルエラーが出るメッセージを渡してから、それを修正することで再現した。

なるほど

DiscordのAPIが一部変わって、既存メッセージを編集するAPIへ渡すパラメータに省略出来ないものが追加されたらしく、編集に失敗してた。

11:21 AM

今日は直せそうにないかな

Discord APIの変更の関係だったのか

めっちゃ偶然の事象ですね

ナイスデバッグだ。

僕の操作のせいやった

既存メッセージ削除APIは影響を受けていないので、ボットからの意図せぬ返事を残したくない場合は、メッセージ編集ではなく削除＆新規投稿で回避できます。

1

@swift-5.4.3 @swift-5.3.3 @swift-main

protocol P0 {} extension P0 { func openExistential() -> some P0 { return self } } func use<T: P0>(_: T) {} func make() -> P0 { fatalError() } let p0 = make() _ = p0.openExistential()

exit status: 1 with stderr:

<stdin>:13:5: error: member 'openExistential' cannot be used on value of protocol type 'P0'; use a generic constraint instead _ = p0.openExistential() ^~ ~~~~~~~~~~~~~~~

exit status: 1 with stderr:

<stdin>:13:5: error: member 'openExistential' cannot be used on value of protocol type 'P0'; use a generic constraint instead _ = p0.openExistential() ^~ ~~~~~~~~~~~~~~~

exit status: 4 with stderr:

Fatal error: file main/<stdin>, line 10 Current stack trace: 0 libswiftCore.so 0x00007fc7d0e80df0 swift_reportError + 50 1 libswiftCore.so 0x00007fc7d0ef4160 _swift_stdlib_reportFatalErrorInFile + 115 2 libswiftCore.so 0x00007fc7d0bd9eb5 <unavailable> + 1400501 3 libswiftCore.so 0x00007fc7d0bd9af7 <unavailable> + 1399543 4 libswiftCore.so 0x00007fc7d0bda0e2 <unavailable> + 1401058 5 libswiftCore.so 0x00007fc7d0bd8530 _assertionFailure(_:_:file:line:flags:) + 517 8 swift 0x00000000005b4501 <unavailable> + 1787137 9 swift 0x00000000005a1d04 <unavailable> + 1711364 10 swift 0x0000000000587e88 <unavailable> + 1605256 11 swift 0x000000000057b322 <unavailable> + 1553186 12 swift 0x00000000005780ef <unavailable> + 1540335 13 swift 0x0000000000501c2c <unavailable> + 1055788 14 libc.so.6 0x00007fc7d2f4f740 __libc_start_main + 240 15 swift 0x00000000005017a9 <unavailable> + 1054633 Stack dump: 0. Program arguments: /usr/bin/swift -frontend -interpret - -disable-objc-interop -I /Libraries/.build/x86_64-unknown-linux-gnu/debug -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include -I /Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOSHA1/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOHTTPParser/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOAtomics/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOWindows/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIODarwin/include -I /Libraries/.build/checkouts/swift-nio/Sources/CNIOLinux/inc

ORTでopen existentialできるか？と思ったけど制約付いてるっぽい

10:03 AM

ただ、5.3.2だとコンパイル通っちゃうw

実装はできるのか・・・

@swift-5.4.3 struct Hoge { var hoge, fuga: Int } print(Hoge(hoge: 1, fuga: 2))

Hoge(hoge: 1, fuga: 2)

@swift-5.4.3 import Foundation func f(q: URLRequest) {}

exit status: 1 with stderr:<stdin>:2:11: error: cannot find type 'URLRequest' in scope func f(q: URLRequest) {} ^~~~~~~~~~

？？

7:51 AM

@swift-5.1.5 @swift-5.2.5 @swift-5.3.3 import Foundation func f(q: URLRequest) {}

exit status: 1 with stderr:<stdin>:2:11: error: cannot find type 'URLRequest' in scope func f(q: URLRequest) {} ^~~~~~~~~~

exit status: 1 with stderr:<stdin>:2:11: error: use of undeclared type 'URLRequest' func f(q: URLRequest) {} ^~~~~~~~~~

FoundationNetworking

@swift-5.1.5 @swift-5.2.5 @swift-5.3.3 @swift-5.4.3 import FoundationNetworking func f(q: URLRequest) {}

no output

えええ〜・・・・

7:52 AM

mac/linuxでクロスなコード書けないじゃん

#if canImport(FoundationNetworking) import FoundationNetworking #endif をいたるところに貼り付けます…

開発をXcode/macでやって、デプロイ先がLinuxだから、厳しいなあ (edited)

そのシナリオでcanImportのやつ動きますよ

canImportのやつを書かないといけない事に気づけない。 (edited)

ああ

7:55 AM

LinuxベースのCIがあれば…

CIはあるので、そこでわかるね。

FoundationNetworkingはワナ

罠でしかないですねこれ

7:55 AM

Appleもmac側で追従してくれないと意味がない

逆にCIで気づけてよかった

実装空でもいいからFoundationNetworkingモジュール作って欲しい…

ほんまやなあ。

dockerでビルド通ったのでCIに投げた。

毎回canImport書くのだるかったので https://github.com/rinsuki/FoundationWithNetworking を作ってしまった

GitHub - rinsuki/FoundationWithNetworking: no more #if canImport(Fo...

no more #if canImport(FoundationNetworking). Contribute to rinsuki/FoundationWithNetworking development by creating an account on GitHub.

@swift-5.1.5 @swift-5.4.3

import Foundation func foo() { struct Item<Content: Identifiable>: Equatable { let content: Content static func == (lhs: Item<Content>, rhs: Item<Content>) -> Bool { return lhs.content.id == rhs.content.id } } }

exit status: 1 with stderr:

<stdin>:4:12: error: type 'Item<Content>' does not conform to protocol 'Equatable' struct Item<Content: Identifiable>: Equatable { ^ <stdin>:5:13: note: stored property type 'Content' does not conform to protocol 'Equatable', preventing synthesized conformance of 'Item<Content>' to 'Equatable' let content: Content ^ Swift.==:1:24: note: candidate would match if 'Item<Content>' conformed to 'RawRepresentable' @inlinable public func == <T>(lhs: T, rhs: T) -> Bool where T : RawRepresentable, T.RawValue : Equatable ^ Swift.FloatingPoint:2:24: note: candidate would match if 'Item<Content>' conformed to 'FloatingPoint' public static func == (lhs: Self, rhs: Self) -> Bool ^ Swift.BinaryInteger:2:24: note: candidate would match if 'Item<Content>' conformed to 'BinaryInteger' public static func == <Other>(lhs: Self, rhs: Other) -> Bool where Other : BinaryInteger ^ Swift._Pointer:2:24: note: candidate would match if 'Item<Content>' conformed to '_Pointer' public static func == (lhs: Self, rhs: Self) -> Bool ^ Swift.Strideable:3:35: note: candidate would match if 'Item<Content>' conformed to 'Strideable' @inlinable public static func == (x: Self, y: Self) -> Bool ^ Swift.StringProtocol:2:35: note: candidate would match if 'Item<Content>' conformed to 'StringProtocol' @inlinable public static func == <RHS>(lhs: Self, rhs: RHS) -> Bool where RHS : StringProtocol ^ Swift.SIMD:4:24: note: candidate would match if 'Item<Content>' conformed to 'SIMD' public static func == (lhs: Self, rhs: Self) -> Bool ^ Foundation.__BridgedNSError:2:24: note: candidate would match if 'Item<Content>' conformed to '__BridgedNSError' public static func == (lhs: Self, rhs: Self) -> Bool ^ Foundation._Bri

exit status: 1 with stderr:

<stdin>:4:12: error: type 'Item<Content>' does not conform to protocol 'Equatable' struct Item<Content: Identifiable>: Equatable { ^ Swift.==:1:24: note: candidate would match if 'Item<Content>' conformed to 'RawRepresentable' @inlinable public func == <T>(lhs: T, rhs: T) -> Bool where T : RawRepresentable, T.RawValue : Equatable ^ Swift.FloatingPoint:2:24: note: candidate would match if 'Item<Content>' conformed to 'FloatingPoint' public static func == (lhs: Self, rhs: Self) -> Bool ^ Swift.BinaryInteger:2:24: note: candidate would match if 'Item<Content>' conformed to 'BinaryInteger' public static func == <Other>(lhs: Self, rhs: Other) -> Bool where Other : BinaryInteger ^ Swift._Pointer:2:24: note: candidate would match if 'Item<Content>' conformed to '_Pointer' public static func == (lhs: Self, rhs: Self) -> Bool ^ Swift.Strideable:3:35: note: candidate would match if 'Item<Content>' conformed to 'Strideable' @inlinable public static func == (x: Self, y: Self) -> Bool ^ Swift.StringProtocol:2:35: note: candidate would match if 'Item<Content>' conformed to 'StringProtocol' @inlinable public static func == <RHS>(lhs: Self, rhs: RHS) -> Bool where RHS : StringProtocol ^ Swift.SIMD:4:24: note: candidate would match if 'Item<Content>' conformed to 'SIMD' public static func == (lhs: Self, rhs: Self) -> Bool ^ Foundation.__BridgedNSError:2:24: note: candidate would match if 'Item<Content>' conformed to '__BridgedNSError' public static func == (lhs: Self, rhs: Self) -> Bool ^ Foundation._BridgedStoredNSError:2:24: note: candidate would match if 'Item<Content>' conformed to '_BridgedStoredNSError' public static func == (lhs: Self, rhs: Self) -> Bool ^ Swift.Equatable

@swift-5.2.5 @swift-5.3.3 @propertyWrapper struct Wrap { var wrappedValue: Int = 1 } struct S { @Wrap var val } (edited)

exit status: 1 with stderr:<stdin>:6:13: error: type annotation missing in pattern @Wrap var val ^

no output

https://github.com/apple/swift/pull/30663 property wrapper で var 宣言の型アノテーション省略できる

SwiftUIの@Environment使う時にべんり

前に SwiftUI の @Namespace で初めて見たとき、なんじゃこりゃってなった。 @Namespace private var foo (edited)

@swift-main func hoge() async {} Task { await hoge() }

no output

@swift-5.0.3 do { defer { print(a) } // ←まだaが宣言されてないよ…？ let a = 0 }

exit status: 1 with stderr:

<stdin>:3:9: warning: initialization of immutable value 'a' was never used; consider replacing with assignment to '_' or removing it let a = 0 ~~~~^ _ <stdin>:2:19: error: cannot capture 'a' before it is declared defer { print(a) } // ←まだaが宣言されてないよ…？ <stdin>:3:9: note: 'a' declared here let a = 0 ^

@swift-5.1.5 do { defer { print(a) } // ←まだaが宣言されてないよ…？ let a = 0 }

exit status: 1 with stderr:

<stdin>:3:9: warning: initialization of immutable value 'a' was never used; consider replacing with assignment to '_' or removing it let a = 0 ~~~~^ _ <stdin>:2:19: error: cannot capture 'a' before it is declared defer { print(a) } // ←まだaが宣言されてないよ…？ <stdin>:3:9: note: 'a' declared here let a = 0 ^

@swift-5.2.5 do { defer { print(a) } // ←まだaが宣言されてないよ…？ let a = 0 }

0stderr:

<stdin>:3:9: warning: initialization of immutable value 'a' was never used; consider replacing with assignment to '_' or removing it let a = 0 ~~~~^ _

@swift-5.3.3 do { defer { print(a) } // ←まだaが宣言されてないよ…？ let a = 0 }

0

@swift-5.4.3 do { defer { print(a) } // ←まだaが宣言されてないよ…？ let a = 0 }

0

@swift-5.4.3

func foo() { defer { print(a) } // ←まだaが宣言されてないよ…？ let a: Int? = 42 guard var a = a else { return } a = 20 } foo()

Optional(42)stderr:

<stdin>:2:19: warning: expression implicitly coerced from 'Int?' to 'Any' defer { print(a) } // ←まだaが宣言されてないよ…？ <stdin>:2:19: note: provide a default value to avoid this warning defer { print(a) } // ←まだaが宣言されてないよ…？ <stdin>:2:19: note: force-unwrap the value to avoid this warning defer { print(a) } // ←まだaが宣言されてないよ…？ <stdin>:2:19: note: explicitly cast to 'Any' with 'as Any' to silence this warning defer { print(a) } // ←まだaが宣言されてないよ…？ <stdin>:4:15: warning: variable 'a' was written to, but never read guard var a = a else { return } ^

@swift-5.4.3

func foo() { defer { print(a as Any) } // ←まだaが宣言されてないよ…？ let a: Int? = 42 guard var a = a else { return } a = 20 } foo()

Optional(42)stderr:<stdin>:4:15: warning: variable 'a' was written to, but never read guard var a = a else { return } ^

@swift-5.4.3

func foo() { defer { print(a as Any) } // ←まだaが宣言されてないよ…？ var a: Int? = 42 guard let b = a else { return } a = b + 1 } foo()

Optional(42)

@swift-5.4.3 func foo() { defer { print(a) } // ←まだaが宣言されてないよ…？ var a: Int = 42 a += 1 } foo()

0

@swift-5.4.3 func foo() { defer { // まだaが宣言されてないよ…？ a += 2 print(a) } var a: Int = 42 a += 1 } foo()

2

最終的に実行される場所でのスコープを見るのかと思ったら、知らないところから変数を持ってきてる

これ、変数宣言前の defer での利用ができてしまっていること自体がバグなのかな？昔の挙動が正しかった？

ウケるw

@swift-5.4.3 class C { var a: Int = 1 func f() { let _ = (0...2).map { _ -> Int in _ = a return 1 } let a = 2 } }

exit status: 1 with stderr:

<stdin>:4:25: error: closure captures 'a' before it is declared let _ = (0...2).map { _ -> Int in ^ <stdin>:8:9: note: captured value declared here let a = 2 ^ <stdin>:5:11: note: captured here _ = a ^

前に見つけたやつだけどこれもローカル変数が前方に持ち上げられてる

8:07 AM

（本来はプロパティのa もあるので使えるはず） (edited)

classを使うことでコンパイラを殺せた

8:12 AM

@swift-5.4.3

class A { var i: Int init(_ i: Int) { self.i = i } } func f() -> A { defer { a.i = 10 } let a = A(3) return a } print(f())

exit status: 134 with stderr:

Begin Error in Function: '$s4main1fAA1ACyF' Found outside of lifetime use?! Value: %6 = apply %5(%4, %0) : $@convention(method) (Int, @thick A.Type) -> @owned A // users: %12, %11, %8, %7 Consuming User: destroy_value %6 : $A // id: %11 Non Consuming User: %12 = begin_borrow %6 : $A // users: %15, %14 Block: bb0 End Error in Function: '$s4main1fAA1ACyF' Found ownership error?! triggering standard assertion failure routine UNREACHABLE executed at /home/buildnode/jenkins/workspace/oss-swift-5.4-package-linux-ubuntu-16_04/swift/lib/SIL/Verifier/LinearLifetimeCheckerPrivate.h:211! Please submit a bug report (https://swift.org/contributing/#reporting-bugs) and include the project and the crash backtrace. Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -I /Libraries/.build/x86_64-unknown-linux-gnu/debug -module-cache-path /Libraries/.build/x86_64-unknown-linux-gnu/debug/ModuleCache -D DEBUG -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOSHA1.build/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/swift-nio/Sources/CNIOSHA1/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOHTTPParser.build/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/swift-nio/Sources/CNIOHTTPParser/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOAtomics.build/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/swift-nio/Sources/CNIOAtomics/include -Xc

草

ホンモノのヌルポなのでは

@swift-main func foo() { defer { // まだaが宣言されてないよ…？ a += 2 print(a) } var a: Int = 42 a += 1 } foo()

exit status: 1 with stderr:

<stdin>:4:9: error: use of local variable 'a' before its declaration a += 2 ^ <stdin>:7:9: note: 'a' declared here var a: Int = 42 ^ <stdin>:5:15: error: use of local variable 'a' before its declaration print(a) ^ <stdin>:7:9: note: 'a' declared here var a: Int = 42 ^

nightlyで治ってる案件か

@swift-5.4.3

struct Test { @available(iOS 16, *) var a: Int { 42 } func test() { if #available(macOS 11, *) { print(a) } } } Test().test()

42

@swift-5.4.3 struct Test { @available(iOS 16, *) var a: Int { 42 } func test() { print(a) } } Test().test()

42

@swift-5.3.3 @swift-5.4.3 @swift-main protocol P { associatedtype T } protocol Q: P { typealias T = Int } func f(q: Q) {}

exit status: 1 with stderr:

<stdin>:6:13: warning: typealias overriding associated type 'T' from protocol 'P' is better expressed as same-type constraint on the protocol typealias T = Int ~~~~~~~~~~^~~~~~~ <stdin>:2:18: note: 'T' declared here associatedtype T ^ <stdin>:9:11: error: protocol 'Q' can only be used as a generic constraint because it has Self or associated type requirements func f(q: Q) {} ^

exit status: 1 with stderr:

<stdin>:6:13: warning: typealias overriding associated type 'T' from protocol 'P' is better expressed as same-type constraint on the protocol typealias T = Int ~~~~~~~~~~^~~~~~~ <stdin>:2:18: note: 'T' declared here associatedtype T ^ <stdin>:9:11: error: protocol 'Q' can only be used as a generic constraint because it has Self or associated type requirements func f(q: Q) {} ^

exit status: 1 with stderr:

<stdin>:6:13: warning: typealias overriding associated type 'T' from protocol 'P' is better expressed as same-type constraint on the protocol typealias T = Int ~~~~~~~~~~^~~~~~~ <stdin>:2:18: note: 'T' declared here associatedtype T ^ <stdin>:9:11: error: protocol 'Q' can only be used as a generic constraint because it has Self or associated type requirements func f(q: Q) {} ^

@swift-main protocol P { associatedtype T } protocol Q: P where T = Int { } func f(q: Q) {}

exit status: 1 with stderr:

<stdin>:5:23: error: use '==' for same-type requirements rather than '=' protocol Q: P where T = Int { ^ == <stdin>:8:11: error: protocol 'Q' can only be used as a generic constraint because it has Self or associated type requirements func f(q: Q) {} ^

@swift-main protocol P { associatedtype T } protocol Q: P where T == Int { } func f(q: Q) {}

exit status: 1 with stderr:

<stdin>:8:11: error: protocol 'Q' can only be used as a generic constraint because it has Self or associated type requirements func f(q: Q) {} ^

あれ、確定して埋まってればexistentialとして使えるやつってまだだったっけ

5:01 AM

確定してればじゃないか、メンバが潰れるだけでなんでもいけるようになったのか

5:01 AM

https://github.com/apple/swift/pull/33767

SE-0309: Unlock existential types for all protocols by theblixguy ·...

Implementation for https://forums.swift.org/t/lifting-the-self-or-associated-type-constraint-on-existentials/18025 This PR removes the existing "Self or associated type" restrict...

確定してればメンバも見えるだったような

3ヶ月前にSE statusはacceptedになってるけど実装がdraft PRだ・・・

5:03 AM

review前に実装は用意したがマージできるとは言っていないやつか　あらー

@swift-5.4.3 struct Foo { var x: Int func test() { let x = x + 1 print(x) } }

no output

@swift-5.3.3 struct Foo { var x: Int func test() { let x = x + 1 print(x) } }

exit status: 1 with stderr:<stdin>:5:17: error: variable used within its own initial value let x = x + 1 ^

これ5.4でなおってるのか……

@swift-main protocol P {} struct A { var p: some P = A() }

exit status: 1 with stderr:

<stdin>:3:21: error: return type of property 'p' requires that 'A' conform to 'P' var p: some P = A() ^ <stdin>:3:12: note: opaque return type declared here var p: some P = A() ^~~~~~ <stdin>:3:9: error: property declares an opaque return type, but cannot infer the underlying type from its initializer expression var p: some P = A() ^

@swift-main protocol P {} struct A: P { var p: some P = A() }

exit status: 11 with stderr:

Please submit a bug report (https://swift.org/contributing/#reporting-bugs) and include the project and the crash backtrace. Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -I /Libraries/.build/x86_64-unknown-linux-gnu/debug -module-cache-path /Libraries/.build/x86_64-unknown-linux-gnu/debug/ModuleCache -D DEBUG -new-driver-path /usr/bin/swift-driver -resource-dir /usr/lib/swift -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOSHA1.build/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/swift-nio/Sources/CNIOSHA1/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOHTTPParser.build/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/swift-nio/Sources/CNIOHTTPParser/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOAtomics.build/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/swift-nio/Sources/CNIOAtomics/include -Xcc -fmodule-map-file=/Libraries/.build/checkouts/swift-nio/Sources/CNIOWindows/include/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/swift-nio/Sources/CNIOWindows/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIODarwin.build/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/swift-nio/Sources/CNIODarwin/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOLinux.build/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/swift-nio/Sources/CNIOLinux/include -module-name main -lLib

1

@swift-5.4.3 extension String { func foo() {} } "".foo()

no output

@swift-5.4.3 extension String { private func foo() {} } "".foo() (edited)

exit status: 1 with stderr:

<stdin>:5:4: error: 'foo' is inaccessible due to 'private' protection level "".foo() ^~~ <stdin>:2:16: note: 'foo()' declared here private func foo() {} ^

あっ、privateつけわすれてたw

@swift-5.4.3

final class ViewController { func viewDidLoad() { prepareViews() } } extension ViewController { private func prepareViews() { prepareAView() prepareBView() prepareCView() } /*extension*/private func prepareAView() {} /*extension*/private func prepareBView() {} /*extension*/private func prepareCView() {} }

no output

@swift-5.4.3

final class ViewController { func viewDidLoad() { prepareViews() // ↓これはできてほしくない prepareAView() } } extension ViewController { private func prepareViews() { prepareAView() prepareBView() prepareCView() } /*extension*/private func prepareAView() {} /*extension*/private func prepareBView() {} /*extension*/private func prepareCView() {} }

no output

@swift-5.4.3 print(Bundle.main.bundleURL)

exit status: 1 with stderr:<stdin>:1:7: error: cannot find 'Bundle' in scope print(Bundle.main.bundleURL) ^~~~~~

@swift-5.4.3 import Foundation print(Bundle.main.bundleURL)

file:///usr/bin/

@swift-5.4.3

import Foundation enum Key: String, Codable { case a, b } let data = [Key.a: "A", Key.b: "B"] let json = try String(data: JSONEncoder().encode(data), encoding: .utf8)! print(json)

["b","B","a","A"]

これって正しいんでしょうか？

jsonのkeyは文字列であることが必須で、Stringは特別に文字列であるとみなされてkeyValueになるけど、RawRepresentableはそこ特別にハンドルされてなかった気がする Swift的にはArrayからDictionaryに戻せるのでそっちの動きが優先されてる

正しいというかそういう仕様だよ

7:25 AM

一般のDictionaryのcodingは、[k1, v1, k2, v2, ... ]だから。

7:25 AM

keyがString のときだけ辞書になる

確かに普通にデコードできますね。 keyがStringのときのみの制限は知らなかったです……

あと Int

7:27 AM

それ以外の型でも辞書形式にコーディングするかどうか制御できるAPIが欲しいって話題は最近もフォーラムに書き込みがあった気がする

@swift-main @swift-5.4.3 @swift-5.3.3 @swift-5.2.5

protocol P { func foo() } struct S: P { func foo() {} } func nopConsumeP(_ p: P) {} func useAny(_ x: Any) { if let p = x as? P { nopConsumeP(p) } else { print("キャスト失敗!") } } func useOptionalT(_ x: T?) { useAny(x as Any) } useOptionalT(T())

exit status: 1 with stderr:

<stdin>:19:24: error: use of undeclared type 'T' func useOptionalT(_ x: T?) { ^ <stdin>:23:14: error: use of unresolved identifier 'T' useOptionalT(T()) ^

exit status: 1 with stderr:

<stdin>:19:24: error: cannot find type 'T' in scope func useOptionalT(_ x: T?) { ^ <stdin>:23:14: error: cannot find 'T' in scope useOptionalT(T()) ^

exit status: 1 with stderr:

<stdin>:19:24: error: cannot find type 'T' in scope func useOptionalT(_ x: T?) { ^ <stdin>:23:14: error: cannot find 'T' in scope useOptionalT(T()) ^

exit status: 1 with stderr:

<stdin>:19:24: error: cannot find type 'T' in scope func useOptionalT(_ x: T?) { ^ <stdin>:23:14: error: cannot find 'T' in scope useOptionalT(T()) ^

@swift-main @swift-5.4.3 @swift-5.3.3 @swift-5.2.5

protocol P { func foo() } struct S: P { func foo() {} } func nopConsumeP(_ p: P) {} func useAny(_ x: Any) { if let p = x as? P { nopConsumeP(p) } else { print("キャスト失敗!") } } func useOptionalS(_ x: S?) { useAny(x as Any) } useOptionalS(S())

キャスト失敗!

no output

キャスト失敗!

https://discord.com/channels/291054398077927425/375206337937801216/846314339899670558

5:02 AM

これかな？

5:03 AM

あれ、botとwebの結果が違うのか

Yuta Saito

これかな？

それかもしれない。今、手元のmacの5.4.2では通って、GitHub Action の CI 5.4.0 では落ちて

5:03 AM

「キャスト成功」を出してないだけで結果は同じだよ

そんなことなかった

botでは5.4.2しかないから、fiddleで5.4.1と5.4.0を見てきた

macOSはむずいですよ

コンパイラ的には5.4.0と5.4.2で同じ挙動なので

5:04 AM

CIがCatalinaで、ローカルがBigSurであることによる

5:04 AM

挙動の違いじゃないかというところまで来たところ

ロードするランタイムのちがいですね

5:05 AM

dyldの環境変数でロードするランタイムのバージョン合わせると挙動一致すると思います

やっぱそうなん？ランタイム関数のバックパッチ機能はなんで働いてないん？

コンパイルするときにコンパチブルランタイムバージョン指定してないとか？

Package.swiftに platforms: [ .macOS(.v10_15) ], ってかいた以外のことはしてない

5:10 AM

iOSじゃなくてサーバーサイドswift

その指定してても--runtime-compatibility-versionオプション渡してくれないんでしたっけ

なにもしらないです。

5:13 AM

とにかくそれが指定されていないと、フックは出荷されないということかな

はい

5:15 AM

いや、でも渡すターゲットトリプルによって適切にフック挿入してるように見えるな

5:17 AM

https://github.com/apple/swift/blob/09f2ca7f25e0535594ecd88c54c2e8f14263503b/lib/Driver/DarwinToolChains.cpp#L420

swift/DarwinToolChains.cpp at 09f2ca7f25e0535594ecd88c54c2e8f142635...

The Swift Programming Language. Contribute to apple/swift development by creating an account on GitHub.

CIをbigsurにしたらキャストの挙動が期待通りになった。

5:17 AM

原因はOS違いで確定した。 (edited)

おー

忙しいのでフックがなんでうまくいかなかったかとかは今は置いときます　情報ありがとう

フック問題は宿題だ

幸い、デプロイ先のLinuxのほうが心配が少ないｗ (edited)

やっぱりmacOSは難しい

@swift-main @swift-5.4.3

@available(macOS 12, *) public struct Crayon {} public enum Pen { case pencil @available(macOS 12, *) case crayon(Crayon) }

no output

@swift-5.5.3 -version @swift-5.5.3 print("hello") (edited)

norio_nomura

@swift-5.5.3 -version @swift-5.5.3 print("hello") (edited)

swift -version - Swift version 5.5-dev (LLVM 5ac425fe8b983a2, Swift e6826e3cbcf5c16) Target: x86_64-unknown-linux-gnu (edited)

norio_nomura

@swift-5.5.3 -version @swift-5.5.3 print("hello") (edited)

swift - hello

@swift40 のインスタンスを @swift55 へ変えました。

2

3:57 AM

同時にボットアプリ自体もSwiftからDenoに書き換えました。

JSだとdiscord-apiライブラリが信頼できそうですね

信頼性はどうだろう？

4:03 AM

discord.jsではないので。

あれ、そうなんですか

4:04 AM

なるほどdiscordenoってやつがあるんですね (edited)

そうそれ。

4:08 AM

Swift以外のCLIにも流用できる形にした https://github.com/norio-nomura/cli_discord_bot

GitHub - norio-nomura/cli_discord_bot: CLI Discord Bot

CLI Discord Bot. Contribute to norio-nomura/cli_discord_bot development by creating an account on GitHub.

1

以前のものと違う点 // 追加

リプライによるメンション元の追跡
同じボットへの複数コマンド発行(-Oと-Ononeの比較とか。)
公開スレッド／非公開スレッドチャンネルに対応

// 未実装

インポート可能モジュールの提供(swift-NIOとか)
長文ログのアップロード

(edited)

4:18 AM

とりあえず @swift55 だけが新しいコードで動いてて、それ以外は以前のままです。

4:19 AM

@swift55をしばらく使ってみて、問題なさそうなら他も更新していきます。

1

@swift-5.1.5 @swift-5.4.3 func main() { let a: Int? = 42 guard let a = a else { return } print(a) } main()

42

exit status: 1 with stderr:

<stdin>:3:15: error: definition conflicts with previous value guard let a = a else { return } ^ <stdin>:2:9: note: previous definition of 'a' is here let a: Int? = 42 ^ <stdin>:4:11: warning: expression implicitly coerced from 'Int?' to 'Any' print(a) ^ <stdin>:4:11: note: provide a default value to avoid this warning print(a) ^ ?? <#default value#> <stdin>:4:11: note: force-unwrap the value to avoid this warning print(a) ^ ! <stdin>:4:11: note: explicitly cast to 'Any' with 'as Any' to silence this warning print(a) ^ as Any <stdin>:3:15: warning: value 'a' was defined but never used; consider replacing with boolean test guard let a = a else { return } ~~~~^~~~ != nil

5.4からそれできるんだ

そう、 5.5 からかと思ってた。

結構やりたいことあって、しかたなく let aOrNone にしてたから助かるなー

今たまたま 5.4 でアプリのコード書いててできたから、もうできたんだっけ？と思って。

3:42 AM

5.4.2でできるようになったのかな・・・。

3:42 AM

5.4の頃はできなかったような？

3:45 AM

5.4.0からできるみたい

そうなんだ。

@swift-5.4.3 func main() { guard let _ = Int?.none else { preconditionFailure("preconditionFailure!") } print("hello") } main()

exit status: 4 with stderr:

main/<stdin>:4: Fatal error: preconditionFailure! Current stack trace: 0 libswiftCore.so 0x00007f1c29b157b0 swift_reportError + 50 1 libswiftCore.so 0x00007f1c29b89d30 _swift_stdlib_reportFatalErrorInFile + 112 2 libswiftCore.so 0x00007f1c29873320 _assertionFailure(_:_:file:line:flags:) + 1329 5 swift-frontend 0x00000000005a07e5 <unavailable> + 1705957 6 swift-frontend 0x000000000056a1de <unavailable> + 1483230 7 swift-frontend 0x000000000053a902 <unavailable> + 1288450 8 swift-frontend 0x0000000000539f6c <unavailable> + 1285996 9 swift-frontend 0x000000000052e445 <unavailable> + 1238085 10 swift-frontend 0x00000000004b8d98 <unavailable> + 757144 11 libc.so.6 0x00007f1c2bbc4740 __libc_start_main + 240 12 swift-frontend 0x00000000004b8869 <unavailable> + 755817 Please submit a bug report (https://swift.org/contributing/#reporting-bugs) and include the project and the crash backtrace. Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -I /Libraries/.build/x86_64-unknown-linux-gnu/debug -module-cache-path /Libraries/.build/x86_64-unknown-linux-gnu/debug/ModuleCache -D DEBUG -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOSHA1.build/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/swift-nio/Sources/CNIOSHA1/includ

@swift-5.4.3 -Ounchecked func main() { guard let _ = Int?.none else { preconditionFailure("preconditionFailure!") } print("hello") } main()

exit status: 11 with stderr:

Please submit a bug report (https://swift.org/contributing/#reporting-bugs) and include the project and the crash backtrace. Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -I /Libraries/.build/x86_64-unknown-linux-gnu/debug -module-cache-path /Libraries/.build/x86_64-unknown-linux-gnu/debug/ModuleCache -Ounchecked -D DEBUG -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/SwiftBacktrace/Sources/CSwiftBacktrace/include -Xcc -fmodule-map-file=/Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/SwiftBacktrace/Sources/Clibunwind/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOSHA1.build/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/swift-nio/Sources/CNIOSHA1/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOHTTPParser.build/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/swift-nio/Sources/CNIOHTTPParser/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOAtomics.build/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/swift-nio/Sources/CNIOAtomics/include -Xcc -fmodule-map-file=/Libraries/.build/checkouts/swift-nio/Sources/CNIOWindows/include/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/swift-nio/Sources/CNIOWindows/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIODarwin.build/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/swift-nio/Sources/CNIODarwin/include -Xcc -fmodule-map-file=/Libraries/.build/x86_64-unknown-linux-gnu/debug/CNIOLinux.build/module.modulemap -Xcc -I -Xcc /Libraries/.build/checkouts/swift-nio/Sources/CNIOLinux/include -module-name main -lLibraries 1. Swift version 5.4.2 (swift-5.4.2-RELEASE) 2.

謎死になった。

4:21 AM

でもこれだと、確定で死ぬからmainごと消したれ、みたいな最適化が起きる可能性もありそう。

precondition は消えるけど preconditionFailure は消えなかったはず。

消えてるからログが出てないのでは？

4:29 AM

オプション無しのときは main/<stdin>:4: Fatal error: preconditionFailure! という出力があります。

preconditionFailureの中の何かが消えたのかな

クラッシュしてるってことは死ぬ命令だけは残ってるのか

まー命令見るのが確実ですね

どこかで -Ounchecked で precondition は消えるけど preconditionFailure は消えない○×表見た気がするんだけどなぁ。どこだろう・・・。

4:33 AM

ログの中身は -Onone と -O でも変わったはずだからそういうもので、クラッシュする部分は残ってるとか？

まあ、 guard なので

4:34 AM

突き抜ける先も特に無いですからね

In -Ounchecked builds, the optimizer may assume that this function is never called.

https://developer.apple.com/documentation/swift/1539374-preconditionfailure

4:34 AM

仕様上は消えてもいいのかな。

多分クラッシュする部分は残しておいたほうが

4:35 AM

フロー解析でデッドエンドが検出できるんで得ですよね

4:35 AM

何も考えずに全く関係ない次のラベルにフォールスルーするコードになっちゃってると

4:35 AM

むしろ元のコードよりフローの繋がりが複雑になってしまう

4:36 AM

LLVM IR におけるBasicBlockの接続グラフが変わっちゃうというか。

precondition と違って preconditionFailure は分岐して使うことが前提となってるし、そうかも。

@swift-5.4.3 print([1, "hoge"].description)

[1, "hoge"]

@swift-5.5.3 -O @swift-5.5.3 -Onone print(x) var x = 32 (edited)

norio_nomura

@swift-5.5.3 -O @swift-5.5.3 -Onone print(x) var x = 32 (edited)

swift -O - 32 (edited)

norio_nomura

@swift-5.5.3 -O @swift-5.5.3 -Onone print(x) var x = 32 (edited)

swift -Onone - 0 (edited)

https://forums.swift.org/t/on-the-behavior-of-variables-in-top-level-code/52230

On the behavior of variables in top-level code

The variables in top-level code behave weirdly. They are declared in the global scope, but are initialized serially, like local variables in a normal function. This allows some interesting pieces of code to compile, such as: print(x) var x = 32 This program will print 0. The basic value types are automatically initialized, so they have a value...

norio_nomura

@swift55をしばらく使ってみて、問題なさそうなら他も更新していきます。

@swift-x.x.x ｀｀｀swift という感じでメンションと同じ行にコードを書き始めると今まではいけてたのですが新しいものではエラーになったようです。元々が仕様じゃなかったという感じでしょうか？

その入力形式には以前対応しましたが、今回の書き換え時に意図せず変えてしまった様です。直します。

1

直してdeployしました。 https://github.com/norio-nomura/cli_discord_bot/pull/1

Fix mention ends with codeblock by norio-nomura · Pull Request #1 ·...

@Iceman報告ありがとうございました。

norio_nomura

@Iceman報告ありがとうございました。

修正ありがとうございます！

1

@swift-5.5.3 -version

norio_nomura

@swift-5.5.3 -version

Swift version 5.5 (swift-5.5-RELEASE) Target: x86_64-unknown-linux-gnu

@swift-5.5.3 var count = 0 loop: do { print(count) count += 1 if count >= 10 { break loop } continue loop }

Miwa / Ensan

@swift-5.5.3 var count = 0 loop: do { print(count) count += 1 if count >= 10 { break loop } continue loop }

0 1 2 3 4 5 6 7 8 9

@swift-4.2.4 -frontend -emit-sil

public protocol BaseP { func foo() } public protocol DerivedP: BaseP { func foo() } public struct Concrete: DerivedP { public func foo() {} }

(edited)

sil_stage canonical import Builtin import Swift import SwiftShims public protocol BaseP { func foo() } public protocol DerivedP : BaseP { func foo() } public struct Concrete : DerivedP { public func foo() init() } // main sil @main : $@convention(c) (Int32, UnsafeMutablePointer<Optional<UnsafeMutablePointer<Int8>>>) -> Int32 { bb0(%0 : $Int32, %1 : $UnsafeMutablePointer<Optional<UnsafeMutablePointer<Int8>>>): %2 = integer_literal $Builtin.Int32, 0 // user: %3 %3 = struct $Int32 (%2 : $Builtin.Int32) // user: %4 return %3 : $Int32 // id: %4 } // end sil function 'main' // Concrete.foo() sil @$S4main8ConcreteV3fooyyF : $@convention(method) (Concrete) -> () { // %0 // user: %1 bb0(%0 : $Concrete): debug_value %0 : $Concrete, let, name "self", argno 1 // id: %1 %2 = tuple () // user: %3 return %2 : $() // id: %3 } // end sil function '$S4main8ConcreteV3fooyyF' // protocol witness for DerivedP.foo() in conformance Concrete sil shared [transparent] [serialized] [thunk] @$S4main8ConcreteVAA8DerivedPA2aDP3fooyyFTW : $@convention(witness_method: DerivedP) (@in_guaranteed Concrete) -> () { // %0 // user: %1 bb0(%0 : $*Concrete): %1 = load %0 : $*Concrete // user: %3 // function_ref Concrete.foo() %2 = function_ref @$S4main8ConcreteV3fooyyF : $@convention(method) (Concrete) -> () // user: %3 %3 = apply %2(%1) : $@convention(method) (Concrete) -> () %4 = tuple () // user: %5 return %4 : $() // id: %5 } // end sil function '$S4main8ConcreteVAA8DerivedPA2aDP3fooyyFTW' // protocol witness for BaseP.foo() in conformance Concrete sil shared [transparent] [serialized] [thunk] @$S4main8ConcreteVAA5BasePA2aDP3fooyyFTW : $@convention(witness_method: BaseP) (@

@swift-5.5.3

 actor State { var value = 0 func inc() -> Int { defer { value += 1 } return value } } Task { let state = State() let stream = AsyncStream<Int> { let v = await state.inc() print("produce", v) return v } onCancel: { @Sendable in print("cancel") } var count = 0 for await aa in stream { count += 1 if count > 10 { break } print("for", aa) await Task.sleep(1 * 1000 * 1000 * 1000) } }

Iceman

@swift-5.5.3

 actor State { var value = 0 func inc() -> Int { defer { value += 1 } return value } } Task { let state = State() let stream = AsyncStream<Int> { let v = await state.inc() print("produce", v) return v } onCancel: { @Sendable in print("cancel") } var count = 0 for await aa in stream { count += 1 if count > 10 { break } print("for", aa) await Task.sleep(1 * 1000 * 1000 * 1000) } }

produce 0 for 0

@swift-main @swift-5.5.3 @swift-5.4.3 @swift-5.3.3 @swift-5.2.5 @swift-5.1.5 @swift-5.0.3 @swift-4.2.4 @swift-4.1.3 -version

norio_nomura

@swift-main @swift-5.5.3 @swift-5.4.3 @swift-5.3.3 @swift-5.2.5 @swift-5.1.5 @swift-5.0.3 @swift-4.2.4 @swift-4.1.3 -version

Swift version 5.2.5 (swift-5.2.5-RELEASE) Target: x86_64-unknown-linux-gnu

norio_nomura

@swift-main @swift-5.5.3 @swift-5.4.3 @swift-5.3.3 @swift-5.2.5 @swift-5.1.5 @swift-5.0.3 @swift-4.2.4 @swift-4.1.3 -version

Swift version 5.5-dev (LLVM 87f91d38709ee59, Swift 5e0d32b7a898616) Target: x86_64-unknown-linux-gnu

norio_nomura

@swift-main @swift-5.5.3 @swift-5.4.3 @swift-5.3.3 @swift-5.2.5 @swift-5.1.5 @swift-5.0.3 @swift-4.2.4 @swift-4.1.3 -version

Swift version 5.1.5 (swift-5.1.5-RELEASE) Target: x86_64-unknown-linux-gnu

norio_nomura

@swift-main @swift-5.5.3 @swift-5.4.3 @swift-5.3.3 @swift-5.2.5 @swift-5.1.5 @swift-5.0.3 @swift-4.2.4 @swift-4.1.3 -version

Swift version 5.0.3 (swift-5.0.3-RELEASE) Target: x86_64-unknown-linux-gnu

norio_nomura

@swift-main @swift-5.5.3 @swift-5.4.3 @swift-5.3.3 @swift-5.2.5 @swift-5.1.5 @swift-5.0.3 @swift-4.2.4 @swift-4.1.3 -version

Swift version 4.2.4 (swift-4.2.4-RELEASE) Target: x86_64-unknown-linux-gnu

norio_nomura

@swift-main @swift-5.5.3 @swift-5.4.3 @swift-5.3.3 @swift-5.2.5 @swift-5.1.5 @swift-5.0.3 @swift-4.2.4 @swift-4.1.3 -version

Swift version 5.4.3 (swift-5.4.3-RELEASE) Target: x86_64-unknown-linux-gnu

norio_nomura

@swift-main @swift-5.5.3 @swift-5.4.3 @swift-5.3.3 @swift-5.2.5 @swift-5.1.5 @swift-5.0.3 @swift-4.2.4 @swift-4.1.3 -version

Swift version 4.1.3 (swift-4.1.3-RELEASE) Target: x86_64-unknown-linux-gnu

norio_nomura

@swift-main @swift-5.5.3 @swift-5.4.3 @swift-5.3.3 @swift-5.2.5 @swift-5.1.5 @swift-5.0.3 @swift-4.2.4 @swift-4.1.3 -version

Swift version 5.3.3 (swift-5.3.3-RELEASE) Target: x86_64-unknown-linux-gnu

norio_nomura

@swift-main @swift-5.5.3 @swift-5.4.3 @swift-5.3.3 @swift-5.2.5 @swift-5.1.5 @swift-5.0.3 @swift-4.2.4 @swift-4.1.3 -version

Swift version 5.6-dev (LLVM 063fb68c1307e0b, Swift 14eefd1162036b8) Target: x86_64-unknown-linux-gnu

Swiftコンパイラボット全てをDeno版を使うように更新しました。 (edited)

1

4:51 AM

ボットのDiscordトークン抜き放題バグを塞ぎました

そんなバグがあったんですか

もし、僕が作ったボットを元にしたものをここ以外で使っている場合は、更新することをお勧めします。

昔岸川さんのbotが乗っ取られた事があったけど、関係あるんだろうか。

今のところ悪用された形跡は無いので、関係ないんじゃ無いかな。

なるほど。

コードに起因するバグではなく、デプロイに問題がありました。

2018年頃ボットを運用し始めた時から存在したはずなので、今までよくぞ見逃してもらえていたな、といった感じ。 (edited)

逆にどうやって気がついたんですか？

cli_discord_botに、他の常時起動していないボットアカウント向けメンションを監視して、Webアクセス経由でそのボットを起こす機能を追加できないか検討していて、設定が多くなってきて、設定方法をどうするか検討していて気づきました。

なるほど〜

ボット自動アップデートを復活させました。

1

norio_nomura

ボットのDiscordトークン抜き放題バグを塞ぎました

ボットとSwiftコンパイラが同じコンテナ内の同じアカウントで動いてるので、Herokuの設定から環境変数経由で渡されたDiscordトークンを読み出せてた。 (edited)

1

12:58 AM

環境変数に残らないよう変えた。 @swift-main import Foundation print(try! String(contentsOf: URL(fileURLWithPath: "/proc/3/environ"))) (edited)

norio_nomura

環境変数に残らないよう変えた。 @swift-main import Foundation print(try! String(contentsOf: URL(fileURLWithPath: "/proc/3/environ"))) (edited)

PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/binDENO_TLS_CA_STORE=system

~~ボットがリプライに含まれるメンションに反応しないな…~~ 直しました。 (edited)

norio_nomura

ボットとSwiftコンパイラが同じコンテナ内の同じアカウントで動いてるので、Herokuの設定から環境変数経由で渡されたDiscordトークンを読み出せてた。 (edited)

ボットとSwiftコンパイラが同じコンテナ内の同じアカウントで動いてるのは、これはHerokuの制限なので今も変わらず。

swiftNightly

PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/binDENO_TLS_CA_STORE=system

ちなみにコマンドラインも簡単に取れるので、設定は標準入力経由で渡してる。 @swift-main import Foundation print(try! String(contentsOf: URL(fileURLWithPath: "/proc/3/cmdline")))

norio_nomura

ちなみにコマンドラインも簡単に取れるので、設定は標準入力経由で渡してる。 @swift-main import Foundation print(try! String(contentsOf: URL(fileURLWithPath: "/proc/3/cmdline")))

denorun--allow-env=PATH--allow-net--allow-run=/usr/bin/env--quiet-

Herokuから受け取った環境変数を標準入力として渡すshスクリプトでは、exec env -i で環境変数を消して、shプロセスをdenoプロセスへ置き換える形にしてる。 exec env -i PATH=${PATH} DENO_TLS_CA_STORE=system deno run ... (edited)

2:21 AM

これで procfs を経由したトークン取得の(知りうる範囲での)穴を塞げた。 (edited)

2:26 AM

ここまで書けば、以前のきしかわさんのボットのハックとは関係無いだろう、という予想もより納得してもらえるかと。 (edited)

他にも、ボットとSwiftコンパイラが同じコンテナ内の同じアカウントで動いてる故に起こせる挙動（ボットプロセスをkillするとか）もあるだろうけど、Herokuのコンテナを再起動すれば直る様なものは対策しないと思う。

ボットとSwiftコンパイラが同じコンテナ内の同じアカウントで動いてる

なるほど、出発点がそういう話なのか。

いかにHerokuへお金を払わずに済ますかという縛りプレイ。

2:53 AM

僕が提供してるボットの稼働には僕の人件費以外、使用量に応じたコストはかからないので、じゃんじゃん使ってください。 (edited)

1

norio_nomura

ボットとSwiftコンパイラが同じコンテナ内の同じアカウントで動いてるのは、これはHerokuの制限なので今も変わらず。

Herokuもお金を払えば、コンテナ分離構成で作れます。

3:03 AM

一応今後の予定としては、たぶん、古いSwiftバージョンボットの非常駐化を優先します。

3:06 AM

今まで僕のGmaiアドレスで<name>+...@gmail.com形式のエリアスを使って、Herokuのアカウントをボット毎に作ってきました。 (edited)

3:07 AM

しかしswift55ボットのHerokuアカウントを作る際に、メールアドレスが弾かれる様になり作れなかったので、swift40ボットのHerokuアカウントを流用しました。

3:09 AM

ボットを非常駐化すれば、Herokuアカウントを減らせるかなと。

Heroku無料プラン縛りプレイ難しいｗ

アカウントBANではなく、新規作成を弾いてくるのが巧妙ですw

3:11 AM

まあ、Gmailエリアスではなく新規にGmailアカウントを作れば解決しそうですが、これも縛りの一環ということで。

3:13 AM

HerokuのTOSを確認した限り、複数アカウント作成に関する制限は明文化されてないのですよね。

@swift-4.1.3 @swift-5.0.3 @swift-5.2.5 @swift-5.4.3 @swift-5.5.3 protocol P { var value: Int? { get } } struct S: P { let value: Int = 42 }

koher

@swift-4.1.3 @swift-5.0.3 @swift-5.2.5 @swift-5.4.3 @swift-5.5.3 protocol P { var value: Int? { get } } struct S: P { let value: Int = 42 }

exit status: 1 with stderr:

<stdin>:5:8: error: type 'S' does not conform to protocol 'P' struct S: P { ^ <stdin>:6:9: note: candidate has non-matching type 'Int' let value: Int = 42 ^ <stdin>:2:9: note: protocol requires property 'value' with type 'Int?'; do you want to add a stub? var value: Int? { get } ^

koher

@swift-4.1.3 @swift-5.0.3 @swift-5.2.5 @swift-5.4.3 @swift-5.5.3 protocol P { var value: Int? { get } } struct S: P { let value: Int = 42 }

exit status: 1 with stderr:

<stdin>:5:8: error: type 'S' does not conform to protocol 'P' struct S: P { ^ <stdin>:6:9: note: candidate has non-matching type 'Int' let value: Int = 42 ^ <stdin>:2:9: note: protocol requires property 'value' with type 'Int?'; do you want to add a stub? var value: Int? { get } ^

koher

@swift-4.1.3 @swift-5.0.3 @swift-5.2.5 @swift-5.4.3 @swift-5.5.3 protocol P { var value: Int? { get } } struct S: P { let value: Int = 42 }

exit status: 1 with stderr:

<stdin>:5:8: error: type 'S' does not conform to protocol 'P' struct S: P { ^ <stdin>:6:9: note: candidate has non-matching type 'Int' let value: Int = 42 ^ <stdin>:2:9: note: protocol requires property 'value' with type 'Int?'; do you want to add a stub? var value: Int? { get } ^

koher

@swift-4.1.3 @swift-5.0.3 @swift-5.2.5 @swift-5.4.3 @swift-5.5.3 protocol P { var value: Int? { get } } struct S: P { let value: Int = 42 }

exit status: 1 with stderr:

<stdin>:5:8: error: type 'S' does not conform to protocol 'P' struct S: P { ^ <stdin>:6:9: note: candidate has non-matching type 'Int' let value: Int = 42 ^ <stdin>:2:9: note: protocol requires property 'value' with type 'Int?'; do you want to add a stub? var value: Int? { get } ^

koher

@swift-4.1.3 @swift-5.0.3 @swift-5.2.5 @swift-5.4.3 @swift-5.5.3 protocol P { var value: Int? { get } } struct S: P { let value: Int = 42 }

exit status: 1 with stderr:

<stdin>:5:8: error: type 'S' does not conform to protocol 'P' struct S: P { ^ <stdin>:6:9: note: candidate has non-matching type 'Int' let value: Int = 42 ^ <stdin>:2:9: note: protocol requires property 'value' with type 'Int?'; do you want to add a stub? var value: Int? { get } ^

これってだめなんだっけ？

10:21 AM

@swift-5.5.3 class C { func foo() -> Int? { nil } } class SC: C { override func foo() -> Int { 42 } }

koher

@swift-5.5.3 class C { func foo() -> Int? { nil } } class SC: C { override func foo() -> Int { 42 } }

no output

これはできるのか。

10:22 AM

@swift-5.5.3 protocol P { func foo() -> Int? } struct S: P { func foo() -> Int { 42 } }

koher

@swift-5.5.3 protocol P { func foo() -> Int? } struct S: P { func foo() -> Int { 42 } }

exit status: 1 with stderr:

<stdin>:5:8: error: type 'S' does not conform to protocol 'P' struct S: P { ^ <stdin>:6:10: note: candidate has non-matching type '() -> Int' func foo() -> Int { 42 } ^ <stdin>:2:10: note: protocol requires function 'foo()' with type '() -> Int?'; do you want to add a stub? func foo() -> Int? ^

こっちはダメ。

readonly と readwriteは共変性と反変性がかわるので

10:22 AM

set ableなのはダメですね

{ get } なので readonly だし、 func の戻り値でもダメみたいですね。

readonlyだった、失礼しました

11:03 AM

確かOptionalのoverrideが許されてるのはclassだけで、

11:04 AM

これもObjc互換のためだかで、2重オプショナルは壊れるとかそういう感じだったと思います (edited)

なるほど。Optionalのサブタイピング、全般的に使えるのかと思ってました。

あんまりあっちこっちで許しちゃうと破綻箇所が拡散しちゃいますからね

1:55 PM

今のままで良いと考えています

クラスの継承は許すけどプロトコルの適合は許さないというのは、すでにサブタイピングとして破綻してると思いますけどね〜。 @swift-5.5.3 class Animal {} class Cat: Animal {} protocol P { func animal() -> Animal } struct S { func animal() -> Cat { Cat() } }

koher

クラスの継承は許すけどプロトコルの適合は許さないというのは、すでにサブタイピングとして破綻してると思いますけどね〜。 @swift-5.5.3 class Animal {} class Cat: Animal {} protocol P { func animal() -> Animal } struct S { func animal() -> Cat { Cat() } }

no output

↑とかもできるわけだし。 (edited)

11:46 PM

やっぱり Foo | Nil と Either<Foo, Nil> を混ぜて扱うこと自体に無理がある・・・。 Codable と JSON の Foo?? とかも。色んなところで歪みが出るのは避けられなくて、できるだけ普段目に触れないところで出すようにしてるけど、普段目に見えないからこそ不意をつかれた感じになる。

11:52 PM

一方で、 Obj-C 連携とか、普段の使い勝手（たとえば Optional に代入する度に .some を書くべきなのか）とかを考えると仕方ないよなぁ。仮に全部 Foo | Nil に寄せると IteratorProtocol の next が（ Element が Optional のときに）表現できないとかそれはそれで問題があって、とはいえ Foo | Nil と Either<Foo, Nil> を適切に使い分けるのもハードルが高いし、どれを取っても一長一短。なので、 Swift は理論的なきれいさよりも実用上の使いやすさをとって、その分生じる歪みをできるだけ目立たないところで消化するという選択なんだろうなぁ。

@swift-5.5.3 import Foundation @objc protocol P { func foo() -> NSObject? } class S: NSObject, P { func foo() -> NSObject { self } } (edited)

tarunon

@swift-5.5.3 import Foundation @objc protocol P { func foo() -> NSObject? } class S: NSObject, P { func foo() -> NSObject { self } } (edited)

exit status: 1 with stderr:

<stdin>:2:2: error: Objective-C interoperability is disabled @objc protocol P { ~^~~~~ <stdin>:6:7: error: type 'S' does not conform to protocol 'P' class S: NSObject, P { ^ <stdin>:7:10: note: candidate has non-matching type '() -> NSObject' func foo() -> NSObject { self } ^ <stdin>:3:10: note: protocol requires function 'foo()' with type '() -> NSObject?'; do you want to add a stub? func foo() -> NSObject? ^

(edited)

@objc付けてもダメなのか

Linux だから？

3:14 AM

3:15 AM

たしかに @objc protocol だと準拠可能になったけど警告は出た

良い塩梅な気がする

3:16 AM

それならclassのoverrideも警告して良いんじゃないだろうかと感じるけど

僕はオーバーライドのルールと、関数型の互換性のルールが一致してないのは変だと思う。

func trans(_ f: (Int) -> Int?) { _ = f(0) } func main() { func f(a: Int?) -> Int { a ?? 0 } // (Int?) -> Int is (Int) -> Int? trans(f) }

(edited)

優先度が同じレベルのオーバーロードが存在した場合にどっちが適合すべきか区別つかないからこっちにも_disfavoredOverloadが必要になりそう

それは通常のオーバロードと同じで、暗黙変換がなるべく少なくて済む方を選ぶ規則で良いと思う

protocol P { func f(_ v: Int) -> Int? } class C: P { func f(_ v: Int?) -> Int? { 1 } func f(_ v: Int) -> Int { 2 } } こういうの同じレベルになりませんか？

それは別にOptionalに限った話ではない気がするけど

3:40 AM

↑これと同じ原理で、オーバーライドするメソッドを選択する。

そういえばもう既に @_implements はあるか。

@swift-5.5.3

@resultBuilder enum MyBuilder { static func buildBlock<C>(_ c: C) -> C { c } static func buildBlock<C>(_ c: C) -> Int { 1 } } func f(@MyBuilder content: () -> Int) { print(content()) } f { "" }

Iceman

@swift-5.5.3

@resultBuilder enum MyBuilder { static func buildBlock<C>(_ c: C) -> C { c } static func buildBlock<C>(_ c: C) -> Int { 1 } } func f(@MyBuilder content: () -> Int) { print(content()) } f { "" }

1

これはできるのに

10:42 AM

@swift-5.5.3

@resultBuilder enum MyBuilder { static func buildBlock<C>(_ c: C) -> C { c } @_disfavoredOverload static func buildBlock<C>(_ c: C) -> Int { 1 } } func f(@MyBuilder content: () -> Int) { print(content()) } f { "" }

Iceman

@swift-5.5.3

@resultBuilder enum MyBuilder { static func buildBlock<C>(_ c: C) -> C { c } @_disfavoredOverload static func buildBlock<C>(_ c: C) -> Int { 1 } } func f(@MyBuilder content: () -> Int) { print(content()) } f { "" }

exit status: 1 with stderr:<stdin>:17:5: error: cannot convert value of type 'String' to closure result type 'Int' "" ^~

これはできない

10:42 AM

_disfavoredOverload をつけることで可能性がまるごと消えてしまった

えーｗ　なんで・・・

@swift-5.5.3 import UIKit

Iceman

@swift-5.5.3 import UIKit

exit status: 1 with stderr:<stdin>:1:8: error: no such module 'UIKit' import UIKit ^

@swift-5.5.3

@propertyWrapper struct Wrap { var wrappedValue: Int var projectedValue: Int = 0 } actor A { nonisolated var a: Int = 0 @Wrap nonisolated var i: Int = 0 nonisolated var u: Wrap = .init(wrappedValue: 0) nonisolated var e: Int { $i } nonisolated var o: Wrap { _i } }

(edited)

Iceman

@swift-5.5.3

@propertyWrapper struct Wrap { var wrappedValue: Int var projectedValue: Int = 0 } actor A { nonisolated var a: Int = 0 @Wrap nonisolated var i: Int = 0 nonisolated var u: Wrap = .init(wrappedValue: 0) nonisolated var e: Int { $i } nonisolated var o: Wrap { _i } }

(edited)

exit status: 1 with stderr:

<stdin>:6:3: error: nonisolated' can not be applied to stored properties nonisolated var a: Int = 0 ^~~~~~~~~~~~ <stdin>:8:3: error: nonisolated' can not be applied to stored properties nonisolated var u: Wrap = .init(wrappedValue: 0) ^~~~~~~~~~~~ <stdin>:9:28: error: actor-isolated property '$i' can not be referenced from a non-isolated context nonisolated var e: Int { $i } ^ <stdin>:7:25: note: property declared here @Wrap nonisolated var i: Int = 0 ^ <stdin>:10:29: error: actor-isolated property '_i' can not be referenced from a non-isolated context nonisolated var o: Wrap { _i } ^ <stdin>:7:25: note: property declared here @Wrap nonisolated var i: Int = 0 ^

(edited)

これ i だけOKなんだな

9:12 AM

ほんまか？

9:12 AM

@swift-5.5.3

@propertyWrapper struct Wrap { var wrappedValue: Int var projectedValue: Int = 0 } actor A { @Wrap nonisolated var i: Int = 0 }

Iceman

@swift-5.5.3

@propertyWrapper struct Wrap { var wrappedValue: Int var projectedValue: Int = 0 } actor A { @Wrap nonisolated var i: Int = 0 }

no output

ほんまや・・・

あれ、それはなんでOKなんだ？

@swift-5.5.3 -O @swift-5.5.3 -Onone print(a) let a = 1 print(a)

1

norio_nomura

@swift-5.5.3 -O @swift-5.5.3 -Onone print(a) let a = 1 print(a)

swift -O - 1 1

norio_nomura

@swift-5.5.3 -O @swift-5.5.3 -Onone print(a) let a = 1 print(a)

swift -Onone - 0 1

@swift-5.5.3 @swift-main _ = 1 as Sendable

tarunon

@swift-5.5.3 @swift-main _ = 1 as Sendable

no output

tarunon

@swift-5.5.3 @swift-main _ = 1 as Sendable

no output

オッ治るのか

@swift-main protocol P {} extension Int: P {} func f() -> [some P] { [1, 2] } print(f()) (edited)

Iceman

@swift-main protocol P {} extension Int: P {} func f() -> [some P] { [1, 2] } print(f()) (edited)

exit status: 1 with stderr:

<stdin>:3:13: error: 'opaque' types cannot be nested inside other types; structural 'opaque' types are an experimental feature func f() -> [some P] { [1, 2] } ^

(edited)

@swift-5.5.3 @swift-5.4.3

import XCTest let c1 = { XCTAssertNoThrow(1) } let c2 = { XCTAssertNoThrow(try Result<Int, Error>.success(1).get()) } print(type(of: c1)) print(type(of: c2))

Iceman

@swift-5.5.3 @swift-5.4.3

import XCTest let c1 = { XCTAssertNoThrow(1) } let c2 = { XCTAssertNoThrow(try Result<Int, Error>.success(1).get()) } print(type(of: c1)) print(type(of: c2))

() -> () () throws -> ()

Iceman

@swift-5.5.3 @swift-5.4.3

import XCTest let c1 = { XCTAssertNoThrow(1) } let c2 = { XCTAssertNoThrow(try Result<Int, Error>.success(1).get()) } print(type(of: c1)) print(type(of: c2))

() -> () () throws -> ()

@swift-5.0.3

import XCTest let c1 = { XCTAssertNoThrow(1) } let c2 = { XCTAssertNoThrow(try Result<Int, Error>.success(1).get()) } print(type(of: c1)) print(type(of: c2))

Iceman

@swift-5.0.3

import XCTest let c1 = { XCTAssertNoThrow(1) } let c2 = { XCTAssertNoThrow(try Result<Int, Error>.success(1).get()) } print(type(of: c1)) print(type(of: c2))

() -> () () throws -> ()

autoclosureにthrows吸われると思ってたけど吸われないのか

@swift-5.5.3

import XCTest let c3: () -> () = { XCTAssertNoThrow(try Result<Int, Error>.success(1).get()) } func c4() { XCTAssertNoThrow(try Result<Int, Error>.success(1).get()) } print(type(of: c3)) print(type(of: c4))

Iceman

@swift-5.5.3

import XCTest let c3: () -> () = { XCTAssertNoThrow(try Result<Int, Error>.success(1).get()) } func c4() { XCTAssertNoThrow(try Result<Int, Error>.success(1).get()) } print(type(of: c3)) print(type(of: c4))

exit status: 1 with stderr:

<stdin>:3:20: error: invalid conversion from throwing function of type '() throws -> ()' to non-throwing function type '() -> ()' let c3: () -> () = { ^

funcのときはautoclosureにtry吸われるけど、クロージャとして定義するときは吸われないというものだった

@swift-5.5.3 func f() { print(nanika) } f() let nanika: String = { print("nanika is initialized!") return "nanika" }()

Iceman

@swift-5.5.3 func f() { print(nanika) } f() let nanika: String = { print("nanika is initialized!") return "nanika" }()

nanika is initialized!

@swift-5.5.3

func f() { let v = nanika if v.isEmpty { print("nanika is empty") } else { print(v) } } f() let nanika: String = { print("nanika is initialized!") return "nanika" }()

Iceman

@swift-5.5.3

func f() { let v = nanika if v.isEmpty { print("nanika is empty") } else { print(v) } } f() let nanika: String = { print("nanika is initialized!") return "nanika" }()

nanika is empty nanika is initialized!

何かが消滅した

これmacosだとクラッシュするんですよ

10:46 AM

うちのmacだと動いたけど、emptyが先に出るのはどっちにしても変だな

あれ、実行できてますね。僕がplaygroundでやってるからかも

@swift-main func f() { nanika.withCString { ptr in print(ptr.pointee) } } f() let nanika: String = { return "nanika" }() (edited)

Yuta Saito

@swift-main func f() { nanika.withCString { ptr in print(ptr.pointee) } } f() let nanika: String = { return "nanika" }() (edited)

exit status: 139 with stderr:

Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -new-driver-path /usr/bin/swift-driver -resource-dir /usr/lib/swift -module-name main 1. Swift version 5.6-dev (LLVM bfd3cb18089d333, Swift 367b4c1355d9269) 2. Compiling with the current language version 3. While running user code "<stdin>" Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it): /usr/bin/swift-frontend[0x5f5aee3] /usr/bin/swift-frontend[0x5f58a8e] /usr/bin/swift-frontend[0x5f5b276] /lib/x86_64-linux-gnu/libpthread.so.0(+0x12980)[0x7fcd67aec980] /usr/lib/swift/linux/libswiftCore.so($ss13_StringObjectV18getSharedUTF8StartSPys5UInt8VGyF+0xd)[0x7fcd5ed2f22d]

@swift-main print(nanika) let nanika: String = { return "nanika" }()

Yuta Saito

@swift-main print(nanika) let nanika: String = { return "nanika" }()

@swift-main let nanika: String = { return "nanika" }() print(nanika)

Yuta Saito

@swift-main let nanika: String = { return "nanika" }() print(nanika)

nanika

nanikaの宣言の位置によってnanikaの初期化処理の配置がIRレベルで変わるが、Swiftレベルではどこでも触れるので、初期化前に触って死ぬらしい

トップレベルのコードかどうかは関係ある？

ありますね

10:57 AM

これはコンパイル通らないので初期化前の使用が防げる func main() { print(nanika) let nanika: String = { return "nanika" }() }

Yuta Saito

nanikaの宣言の位置によってnanikaの初期化処理の配置がIRレベルで変わるが、Swiftレベルではどこでも触れるので、初期化前に触って死ぬらしい

グローバル変数に触る時って必ず初期化関数を介すると思ったが、トップレベルだとそうではないのか

たぶんクロージャで初期化してるのが関係してる気がする

この現象が触れるのってスクリプトとしてSwiftを実行する場合だけ？

普通にコンパイルしても再現するんですよ

そうなんだ。

これfの実装が別ファイルだとうっかり起こりうるかもなと。

あー、きしかわさんの「スクリプトとして」の意味が分かった。確かにライブラリとしてパースするとちゃんと初期化関数はさまるので

そうそう。as libraryみたいなオプション。

11:10 AM

直接実行しない場合はそうするんじゃなかったっけ。

普通にアプリを書いてて -parse-as-library 付けてれば大丈夫ですね

11:11 AM

ですね

ちょうど最近トップレベルの変数宣言についてアクティブな議論がありました。 https://forums.swift.org/t/on-the-behavior-of-variables-in-top-level-code/52230

On the behavior of variables in top-level code

The variables in top-level code behave weirdly. They are declared in the global scope, but are initialized serially, like local variables in a normal function. This allows some interesting pieces of code to compile, such as: print(x) var x = 32 This program will print 0. The basic value types are automatically initialized, so they have a value...

1

@swift-5.5.3 print(1 / 0)

tarunon

@swift-5.5.3 print(1 / 0)

exit status: 1 with stderr:<stdin>:1:9: error: division by zero print(1 / 0) ^

@swift-5.5.3 print(1.0 / 0.0)

tarunon

@swift-5.5.3 print(1.0 / 0.0)

inf

@swift-main -Xfrontend -enable-experimental-structural-opaque-types let t: (some Numeric, some Numeric) = (0, 0) print(t) (edited)

Miwa / Ensan

@swift-main -Xfrontend -enable-experimental-structural-opaque-types let t: (some Numeric, some Numeric) = (0, 0) print(t) (edited)

exit status: 1 with stderr:

<stdin>:1:8: error: '(some Numeric, some Numeric)' contains multiple 'opaque' types, but only one 'opaque' type is supported let t: (some Numeric, some Numeric) = (0, 0) ^

(edited)

@swift-main -Xfrontend -typecheck -Xfrontend -enable-experimental-structural-opaque-types protocol P {} extension Int: P {} let t: (Int, some P) = (0, 0) (edited)

Yuta Saito

@swift-main -Xfrontend -typecheck -Xfrontend -enable-experimental-structural-opaque-types protocol P {} extension Int: P {} let t: (Int, some P) = (0, 0) (edited)

no output (edited)

こんなオプションあったんですね

12:28 PM

~~なんか動いてないけど~~ -typecheckしかまだだめっぽい (edited)

これです https://github.com/apple/swift-evolution/blob/main/proposals/0328-structural-opaque-result-types.md

swift-evolution/0328-structural-opaque-result-types.md at main · ap...

This maintains proposals for changes and user-visible enhancements to the Swift Programming Language. - swift-evolution/0328-structural-opaque-result-types.md at main · apple/swift-evolution

1

Active Reviewだ https://forums.swift.org/t/se-0328-structural-opaque-result-types/53248

SE-0328: Structural opaque result types

Hello, Swift community. The review of SE-0328: Structural opaque result types begins now and runs through November 11, 2021. Reviews are an important part of the Swift evolution process. All review feedback should be either on this forum thread or, if you would like to keep your feedback private, directly to the review manager. If you do email...

はやくきてくれ！

@swift-5.5.3 -Xfrontend -warn-concurrency

actor SendableExperiment { private var int: Int = 0 private var user2: User2 = .init() private var user3: User3 = .init() private var user4: User4 = .init() private var user5: User5 = .init() func increment() -> Int { int += 1 return int } func incrementAge2() -> User2 { user2.age += 1 return user2 } func incrementAge3() -> User3 { user3.age += 1 return user3 } func incrementAge4() -> User4 { user4.age += 1 return user4 } func incrementAge5() -> User5 { // user5.age += 1 return user5 } } struct User2 { let name: String = "Foo" var age: Int = 42 } public struct User3 { public let name: String = "Foo" public var age: Int = 42 } final class User4 { let name: String = "Foo" var age: Int = 42 } final class User5 { let name: String = "Foo" let age: Int = 42 }

koher

@swift-5.5.3 -Xfrontend -warn-concurrency

actor SendableExperiment { private var int: Int = 0 private var user2: User2 = .init() private var user3: User3 = .init() private var user4: User4 = .init() private var user5: User5 = .init() func increment() -> Int { int += 1 return int } func incrementAge2() -> User2 { user2.age += 1 return user2 } func incrementAge3() -> User3 { user3.age += 1 return user3 } func incrementAge4() -> User4 { user4.age += 1 return user4 } func incrementAge5() -> User5 { // user5.age += 1 return user5 } } struct User2 { let name: String = "Foo" var age: Int = 42 } public struct User3 { public let name: String = "Foo" public var age: Int = 42 } final class User4 { let name: String = "Foo" var age: Int = 42 } final class User5 { let name: String = "Foo" let age: Int = 42 }

no output

3と4通るんだっけ？？

@swift-main @swift-5.5.3 -warn-concurrency

@MainActor protocol P { } struct S: P {} Task { await MainActor.run { let p: P = S() let optionalP: P! = nil let s: S = S() Task { print(String(describing: p)) print(String(describing: optionalP)) print(String(describing: s)) } } }

(edited)

Iceman

@swift-main @swift-5.5.3 -warn-concurrency

@MainActor protocol P { } struct S: P {} Task { await MainActor.run { let p: P = S() let optionalP: P! = nil let s: S = S() Task { print(String(describing: p)) print(String(describing: optionalP)) print(String(describing: s)) } } }

(edited)

stderr:

<stdin>:11:32: warning: cannot use let 'p' with a non-sendable type 'P' from concurrently-executed code print(String(describing: p)) ^ <stdin>:1:21: note: protocol 'P' does not conform to the 'Sendable' protocol @MainActor protocol P { } ^ <stdin>:12:32: warning: cannot use let 'optionalP' with a non-sendable type 'P?' from concurrently-executed code print(String(describing: optionalP)) ^ <stdin>:1:21: note: protocol 'P' does not conform to the 'Sendable' protocol @MainActor protocol P { } ^

(edited)

Iceman

@swift-main @swift-5.5.3 -warn-concurrency

@MainActor protocol P { } struct S: P {} Task { await MainActor.run { let p: P = S() let optionalP: P! = nil let s: S = S() Task { print(String(describing: p)) print(String(describing: optionalP)) print(String(describing: s)) } } }

(edited)

stderr:

<stdin>:11:32: warning: cannot use let 'p' with a non-sendable type 'P' from concurrently-executed code print(String(describing: p)) ^ <stdin>:12:32: warning: cannot use let 'optionalP' with a non-sendable type 'P?' from concurrently-executed code print(String(describing: optionalP)) ^

(edited)

@swift-5.5.3 @swift-5.4.3 --version

Iceman

@swift-5.5.3 @swift-5.4.3 --version

Swift version 5.4.3 (swift-5.4.3-RELEASE) Target: x86_64-unknown-linux-gnu

Iceman

@swift-5.5.3 @swift-5.4.3 --version

Swift version 5.5-dev (LLVM c315411fac10439, Swift 424bc4056fc81c2) Target: x86_64-unknown-linux-gnu

@swift-5.1.5 --version

Iceman

@swift-5.1.5 --version

Swift version 5.1.5 (swift-5.1.5-RELEASE) Target: x86_64-unknown-linux-gnu

@swift-4.1.3 --version

Iceman

@swift-4.1.3 --version

Swift version 4.1.3 (swift-4.1.3-RELEASE) Target: x86_64-unknown-linux-gnu

@swift-main -warn-concurrency var const: Int { 42 } let const2: Int = 42 actor A { init() { _ = const _ = const2 } }

Iceman

@swift-main -warn-concurrency var const: Int { 42 } let const2: Int = 42 actor A { init() { _ = const _ = const2 } }

stderr:

<stdin>:6:9: warning: reference to var 'const' is not concurrency-safe because it involves shared mutable state _ = const ^ <stdin>:1:5: note: var declared here var const: Int { 42 } ^

@swift-main -warn-concurrency func const() -> Int { 42 } let const2: Int = 42 actor A { init() { _ = const() _ = const2 } } (edited)

Yuta Saito

@swift-main -warn-concurrency func const() -> Int { 42 } let const2: Int = 42 actor A { init() { _ = const() _ = const2 } } (edited)

no output (edited)

あれ、関数はいいんだｗ

3:37 AM

グローバル変数をキャプチャする可能性を捨てられないような気がするけど

よくわからないですねw

3:38 AM

@swift-main -warn-concurrency

var mutableG = 0 func const() -> Int { mutableG = 1 return 42 } let const2: Int = 42 actor A { init() { _ = const() _ = const2 } }

Yuta Saito

@swift-main -warn-concurrency

var mutableG = 0 func const() -> Int { mutableG = 1 return 42 } let const2: Int = 42 actor A { init() { _ = const() _ = const2 } }

stderr:

<stdin>:3:3: warning: reference to var 'mutableG' is not concurrency-safe because it involves shared mutable state mutableG = 1 ^ <stdin>:1:5: note: var declared here var mutableG = 0 ^

なるほど？

const() がactor contextを持っているかのような警告だ

3:40 AM

@swift-main -warn-concurrency var mutableG = 0 func const() -> Int { mutableG = 1 return 42 }

Iceman

@swift-main -warn-concurrency var mutableG = 0 func const() -> Int { mutableG = 1 return 42 }

stderr:

<stdin>:3:3: warning: reference to var 'mutableG' is not concurrency-safe because it involves shared mutable state mutableG = 1 ^ <stdin>:1:5: note: var declared here var mutableG = 0 ^

へぇ〜グローバル関数全体がconcurrency-safeか検査するようになってるのかな

ぽいですね

@Yuta Saito このへんの並行安全性ってRustだとどうなってるの？RustにもSendableの概念あるよね

グローバルなmutable変数へのアクセスは一律unsafeになっていてMutexを使わない限り非安全な操作として扱われますね。ここはSend traitを実装していたとしても変わらないです

なるほど。じゃあSwiftのほうがより強力な並行安全を目指してるのか。

4:07 AM

Rustより安全な部分が出てきうるのはすごいな

isolation周りはそうですねえ

@swift-5.5.3

import Foundation let json = """ { "foo": "{\"key\": \"value\"}" } """.data(using: .utf8)! struct Body: Codable { var foo: String } let decoder = JSONDecoder() let decoded = try decoder.decode(Body.self, from: json) print(decoded)

(edited)

Iceman

@swift-5.5.3

import Foundation let json = """ { "foo": "{\"key\": \"value\"}" } """.data(using: .utf8)! struct Body: Codable { var foo: String } let decoder = JSONDecoder() let decoded = try decoder.decode(Body.self, from: json) print(decoded)

(edited)

exit status: 132 with stderr:

Swift/ErrorType.swift:200: Fatal error: Error raised at top level: Swift.DecodingError.dataCorrupted(Swift.DecodingError.Context(codingPath: [], debugDescription: "The given data was not valid JSON.", underlyingError: Optional(Foundation.JSONError.unexpectedCharacter(ascii: 107, characterIndex: 16)))) Current stack trace: 0 libswiftCore.so 0x00007f8a2e843cd0 swift_reportError + 50 1 libswiftCore.so 0x00007f8a2e8bc2a0 _swift_stdlib_reportFatalErrorInFile + 109 2 libswiftCore.so 0x00007f8a2e5c95a2 <unavailable> + 1414562 3 libswiftCore.so 0x00007f8a2e5c92cb <unavailable> + 1413835 4 libswiftCore.so 0x00007f8a2e5c7fb0 _assertionFailure(_:_:file:line:flags:) + 447 5 libswiftCore.so 0x00007f8a2e628d10 swift_errorInMain + 731 7 swift-frontend 0x00000000006e228a <unavailable> + 3023498 8 swift-frontend 0x00000000005ba271 <unavailable> + 1811057 9 swift-frontend 0x000000000056ddc3 <unavailable> + 1498563 10 swift-frontend 0x000000000056d5f7 <unavailable> + 1496567 11 swift-frontend 0x000000000056135e <unavailable> + 1446750 12 swift-frontend 0x00000000004b0646 <unavailable> + 722502 13 libc.so.6 0x00007f8a321f6b10 __libc_start_main + 231 14 swift-frontend 0x00000000004b027a <unavailable> + 721530 Please submit a bug report (https://swift.org/contributing/#reporting-bugs) and include the project and the crash backtrace. Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -new-driver-path /usr/bin/swift-driver -resource-dir /usr/lib/swift -module-name main 1. Swift version 5.5-dev (LLVM c315411fac10439, Swift 424bc4056fc81c2) 2. 3. While running user code "<stdin>" Stack dump wit

(edited)

エスケープされたJSON文字列をデコードする方法ないのかな？

5:13 AM

あれ、これ文字列リテラルの書き方のほうがまずいのか

5:13 AM

@swift-5.5.3

import Foundation let json = """ { "foo": "{\\"key\\": \\"value\\"}" } """.data(using: .utf8)! struct Body: Codable { var foo: String } let decoder = JSONDecoder() let decoded = try decoder.decode(Body.self, from: json) print(decoded)

Iceman

@swift-5.5.3

import Foundation let json = """ { "foo": "{\\"key\\": \\"value\\"}" } """.data(using: .utf8)! struct Body: Codable { var foo: String } let decoder = JSONDecoder() let decoded = try decoder.decode(Body.self, from: json) print(decoded)

Body(foo: "{\"key\": \"value\"}")

ややこしい

そのための SE-0200 なので使ってあげて

import Foundation let json = #"{ "foo": "{\"key\": \"value\"}" }"#.data(using: .utf8)! struct Body: Codable { var foo: String } let decoded = try JSONDecoder().decode(Body.self, from: json) print(decoded)

@swift-5.5.3

import Foundation let json = #""" { "foo": "{\"key\": \"value\"}" } """#.data(using: .utf8)! struct Body: Codable { var foo: String } let decoder = JSONDecoder() let decoded = try decoder.decode(Body.self, from: json) print(decoded)

omochimetaru

@swift-5.5.3

import Foundation let json = #""" { "foo": "{\"key\": \"value\"}" } """#.data(using: .utf8)! struct Body: Codable { var foo: String } let decoder = JSONDecoder() let decoded = try decoder.decode(Body.self, from: json) print(decoded)

Body(foo: "{\"key\": \"value\"}")

お。複数行リテラルのシャープ付きモードもあるんだ。

@swift-main import Differentiation @differentiable func test(x: Float) -> Float { x*x }

ProfFan

@swift-main import Differentiation @differentiable func test(x: Float) -> Float { x*x }

exit status: 1 with stderr:

<stdin>:3:16: warning: '@differentiable' has been renamed to '@differentiable(reverse)' and will be removed in the next release @differentiable ^ (reverse) <stdin>:1:8: error: no such module 'Differentiation' import Differentiation ^

@swift-main func twoOpaqueTypes() -> (some Numeric, some Numeric) { return (1, 2) } (edited)

Miwa / Ensan

@swift-main func twoOpaqueTypes() -> (some Numeric, some Numeric) { return (1, 2) } (edited)

exit status: 1 with stderr:

<stdin>:1:26: error: '(some Numeric, some Numeric)' contains multiple 'opaque' types, but only one 'opaque' type is supported func twoOpaqueTypes() -> (some Numeric, some Numeric) { return (1, 2) } ^

(edited)

@swift-main

struct Links { var `self`: String init(`self`: String) { self.`self` = `self` } } var links = Links(self: "foo/bar") print(links.`self`)

(edited)

nanasi

@swift-main

struct Links { var `self`: String init(`self`: String) { self.`self` = `self` } } var links = Links(self: "foo/bar") print(links.`self`)

(edited)

exit status: 1 with stderr:<stdin>:5:14: error: value of type 'String' has no member 'self' self.`self` = `self` ~~~~ ^~~~~~ (edited)

@swift-main let dict: [_: String] = [0: "zero", 1: "one", 2: "two"]

nanasi

@swift-main let dict: [_: String] = [0: "zero", 1: "one", 2: "two"]

no output

@swift-5.5.3 -warn-concurrency

@MainActor class ViewController { func viewDidAppear() {} } class XViewController: ViewController { override func viewDidAppear() { } } @MainActor protocol StateProtocol { } class State: StateProtocol { func f() async { let vc = ViewController() let xvc = XViewController() Task { vc.viewDidAppear() xvc.viewDidAppear() } } }

(edited)

Iceman

@swift-5.5.3 -warn-concurrency

@MainActor class ViewController { func viewDidAppear() {} } class XViewController: ViewController { override func viewDidAppear() { } } @MainActor protocol StateProtocol { } class State: StateProtocol { func f() async { let vc = ViewController() let xvc = XViewController() Task { vc.viewDidAppear() xvc.viewDidAppear() } } }

(edited)

stderr:

<stdin>:21:7: warning: cannot use let 'xvc' with a non-sendable type 'XViewController' from concurrently-executed code xvc.viewDidAppear() ^

(edited)

なんか変なケースがあった気がするけど忘れてしまった

6:56 AM

お、XViewControllerがnon-sendableだ

6:56 AM

MainActorだと認識してるのにSendableではない

XViewController自体はMainActorで保護されていなくて、ViewController から派生して来たものだけが保護されてるんじゃなかったでしたっけ？

@swift-5.5.3 -warn-concurrency

@MainActor class ViewController { func viewDidAppear() {} } class XViewController: ViewController { override func viewDidAppear() { } func viewDidAppear2() {} } @MainActor protocol StateProtocol { } class State: StateProtocol { func f() async { let vc = ViewController() let xvc = XViewController() Task { vc.viewDidAppear() xvc.viewDidAppear() xvc.viewDidAppear2() } vc.viewDidAppear() xvc.viewDidAppear() xvc.viewDidAppear2() } }

Iceman

@swift-5.5.3 -warn-concurrency

@MainActor class ViewController { func viewDidAppear() {} } class XViewController: ViewController { override func viewDidAppear() { } func viewDidAppear2() {} } @MainActor protocol StateProtocol { } class State: StateProtocol { func f() async { let vc = ViewController() let xvc = XViewController() Task { vc.viewDidAppear() xvc.viewDidAppear() xvc.viewDidAppear2() } vc.viewDidAppear() xvc.viewDidAppear() xvc.viewDidAppear2() } }

stderr:

<stdin>:22:7: warning: cannot use let 'xvc' with a non-sendable type 'XViewController' from concurrently-executed code xvc.viewDidAppear() ^ <stdin>:23:7: warning: cannot use let 'xvc' with a non-sendable type 'XViewController' from concurrently-executed code xvc.viewDidAppear2() ^

Yuta Saito

XViewController自体はMainActorで保護されていなくて、ViewController から派生して来たものだけが保護されてるんじゃなかったでしたっけ？

「ViewController から派生して来たもの」ってどういうくくりでしょうか？

↑の例だと viewDidAppear だけですかね

あとから追加した viewDidAppear2 もMainActorとして認識されてそうと思って↑の例を書きましたが、よく考えたら XVC は何のglobalActorにも保護されてないからただ普通に呼んでるだけでした・・・

@swift-5.5.3 test import XCTest class T: XCTestCase { func testA() async throws {} }

Iceman

@swift-5.5.3 test import XCTest class T: XCTestCase { func testA() async throws {} }

exit status: 64 with stderr:error: Unexpected argument '-' Usage: swift test <options> See 'test -help' for more information.

@swift-5.5.3

import XCTest class T: XCTestCase { func testA() async throws {} static let allTests = [("testA", asyncTest(testA))] } XCTMain([testCase(T.allTests)])

(edited)

norio_nomura

@swift-5.5.3

import XCTest class T: XCTestCase { func testA() async throws {} static let allTests = [("testA", asyncTest(testA))] } XCTMain([testCase(T.allTests)])

(edited)

Test Suite 'All tests' started at 2021-12-15 14:28:43.336 Test Suite 'bin.xctest' started at 2021-12-15 14:28:43.338 Test Suite 'T' started at 2021-12-15 14:28:43.338 Test Case 'T.testA' started at 2021-12-15 14:28:43.338 Test Case 'T.testA' passed (0.002 seconds) Test Suite 'T' passed at 2021-12-15 14:28:43.340 Executed 1 test, with 0 failures (0 unexpected) in 0.002 (0.002) seconds Test Suite 'bin.xctest' passed at 2021-12-15 14:28:43.340 Executed 1 test, with 0 failures (0 unexpected) in 0.002 (0.002) seconds Test Suite 'All tests' passed at 2021-12-15 14:28:43.340 Executed 1 test, with 0 failures (0 unexpected) in 0.002 (0.002) seconds

(edited)

@swift-5.5.3 -warn-concurrency

func f2() async -> Int { 42 } class C {} struct S { let c = C() var value = 0 func f() async { let _ = await f2() print(value) } }

(edited)

Iceman

@swift-5.5.3 -warn-concurrency

func f2() async -> Int { 42 } class C {} struct S { let c = C() var value = 0 func f() async { let _ = await f2() print(value) } }

(edited)

no output (edited)

SはSendableじゃないのにawaitをまたげるのはいいんだっけ？

9:46 AM

暗黙のglobalActorがSについててf のスコープ内では保護されてるのかな

await はまたげるんじゃないですか？

9:49 AM

Actor boundary を越えられないのと、 @Sendable クロージャがキャプチャできない。

@swift-5.5.3 -warn-concurrency

import Foundation func f2() async -> Int { 42 } class Nanika { var value = 0 func f() async { let _ = await f2() value += 1 print(value) } } let nanika = Nanika() for _ in 0..<10 { Task.detached { await nanika.f() } } sleep(1)

(edited)

Iceman

@swift-5.5.3 -warn-concurrency

import Foundation func f2() async -> Int { 42 } class Nanika { var value = 0 func f() async { let _ = await f2() value += 1 print(value) } } let nanika = Nanika() for _ in 0..<10 { Task.detached { await nanika.f() } } sleep(1)

(edited)

1 2 3 4 5 6 7 8 9 10 (edited)

@swift-5.5.3 -warn-concurrency

import Foundation func f2() async -> Int { 42 } class Nanika { var value = 0 func f() async { // let _ = await f2() value += 1 print(value) } } let nanika = Nanika() for _ in 0..<10 { Task.detached { await nanika.f() } } sleep(1)

(edited)

Iceman

@swift-5.5.3 -warn-concurrency

import Foundation func f2() async -> Int { 42 } class Nanika { var value = 0 func f() async { // let _ = await f2() value += 1 print(value) } } let nanika = Nanika() for _ in 0..<10 { Task.detached { await nanika.f() } } sleep(1)

(edited)

2 1 4 5 6 7 8 9 3 10 (edited)

await 以降の処理がグローバルなコンテキストで律速してる？

10:16 AM

暗黙globalActorのQueueが2個のときと1個のときがあって2個のときはバラけるな (edited)

10:19 AM

2個以上あるときは同じ Nanika に対して並列に f を呼び出すと壊れるけど、そもそも呼び出しの時点で何も安全性が保証されてないのでそこを保護してもしょうがないのか

@swift-main @swift-5.5.3

struct MyError: Error {} func throwError() async throws -> Int { throw MyError() } func main() async { async let v = try throwError() _ = try! await v }

(edited)

Yuta Saito

@swift-main @swift-5.5.3

struct MyError: Error {} func throwError() async throws -> Int { throw MyError() } func main() async { async let v = try throwError() _ = try! await v }

(edited)

no output (edited)

Yuta Saito

@swift-main @swift-5.5.3

struct MyError: Error {} func throwError() async throws -> Int { throw MyError() } func main() async { async let v = try throwError() _ = try! await v }

(edited)

no output (edited)

try throwError() の tryは無意味だけどワーニングが出ない

@swift-5.5.3

import Foundation print("Swift, Error".components(separatedBy: .init(charactersIn: ","))) print("Swift, Error".split(separator: ","))

(edited)

Iceman

@swift-5.5.3

import Foundation print("Swift, Error".components(separatedBy: .init(charactersIn: ","))) print("Swift, Error".split(separator: ","))

(edited)

["Swift", " Error"] ["Swift", " Error"] (edited)

@swift-main @swift-5.5.3 -warn-concurrency

import Foundation @MainActor struct Button { var action: () -> () init(_ action: @escaping () -> ()) { self.action = action } func work() { let action = action DispatchQueue.global().async { action() } } } @MainActor struct MyView { var body: some Any { Button { f() } } func f() { print("Thread.isMainThread", Thread.isMainThread) print(Thread.current) } } Task { await MainActor.run { let view = MyView() let button = view.body as! Button button.work() } } RunLoop.main.run(until: Date().addingTimeInterval(0.3)) print("end")

(edited)

Iceman

@swift-main @swift-5.5.3 -warn-concurrency

import Foundation @MainActor struct Button { var action: () -> () init(_ action: @escaping () -> ()) { self.action = action } func work() { let action = action DispatchQueue.global().async { action() } } } @MainActor struct MyView { var body: some Any { Button { f() } } func f() { print("Thread.isMainThread", Thread.isMainThread) print(Thread.current) } } Task { await MainActor.run { let view = MyView() let button = view.body as! Button button.work() } } RunLoop.main.run(until: Date().addingTimeInterval(0.3)) print("end")

(edited)

Thread.isMainThread false <Thread: 0x00007fb86c002140> endstderr:

<stdin>:11:13: warning: cannot use let 'action' with a non-sendable type '() -> ()' from concurrently-executed code action() ^ <stdin>:11:13: note: a function type must be marked '@Sendable' to conform to 'Sendable' action() ^

(edited)

Iceman

@swift-main @swift-5.5.3 -warn-concurrency

import Foundation @MainActor struct Button { var action: () -> () init(_ action: @escaping () -> ()) { self.action = action } func work() { let action = action DispatchQueue.global().async { action() } } } @MainActor struct MyView { var body: some Any { Button { f() } } func f() { print("Thread.isMainThread", Thread.isMainThread) print(Thread.current) } } Task { await MainActor.run { let view = MyView() let button = view.body as! Button button.work() } } RunLoop.main.run(until: Date().addingTimeInterval(0.3)) print("end")

(edited)

Thread.isMainThread false <Thread: 0x00007fec20002130> endstderr:

<stdin>:11:13: warning: cannot use let 'action' with a non-sendable type '() -> ()' from concurrently-executed code action() ^

(edited)

@MainActor な f がメインスレッド以外から呼ばれてるけど、一応Sendableの警告は出てるのでセーフか

@swift-5.5.3 -warn-concurrency

@dynamicMemberLookup struct Box<Value> { var value: Value subscript<T>(dynamicMember keyPath: WritableKeyPath<Value, T>) -> T { get { value[keyPath: keyPath] } set { value[keyPath: keyPath] = newValue } } } struct Foo { var count: Int = 0 } let boxed = Box(value: Foo()) print(boxed.count) let boxedBoxed = Box(value: boxed) print(boxedBoxed.count) print(boxedBoxed[dynamicMember: \.[dynamicMember: \Foo.count]])

(edited)

Iceman

@swift-5.5.3 -warn-concurrency

@dynamicMemberLookup struct Box<Value> { var value: Value subscript<T>(dynamicMember keyPath: WritableKeyPath<Value, T>) -> T { get { value[keyPath: keyPath] } set { value[keyPath: keyPath] = newValue } } } struct Foo { var count: Int = 0 } let boxed = Box(value: Foo()) print(boxed.count) let boxedBoxed = Box(value: boxed) print(boxedBoxed.count) print(boxedBoxed[dynamicMember: \.[dynamicMember: \Foo.count]])

(edited)

0 0 0stderr:

<stdin>:16:17: warning: cannot form key path that captures non-sendable type 'WritableKeyPath<Foo, Int>' print(boxedBoxed.count) ^ <stdin>:17:35: warning: cannot form key path that captures non-sendable type '(dynamicMember: WritableKeyPath<Foo, Int>)' print(boxedBoxed[dynamicMember: \.[dynamicMember: \Foo.count]]) ^

(edited)

@swift-5.5.3 -warn-concurrency struct Box { subscript<T>(bar bar: T) -> T { bar } } let _ = \Box[bar: 1] let _ = \Box[bar: \Int.description] (edited)

Iceman

@swift-5.5.3 -warn-concurrency struct Box { subscript<T>(bar bar: T) -> T { bar } } let _ = \Box[bar: 1] let _ = \Box[bar: \Int.description] (edited)

stderr:

<stdin>:8:13: warning: cannot form key path that captures non-sendable type '(bar: KeyPath<Int, String>)' let _ = \Box[bar: \Int.description] ^

(edited)

@swift-5.2.5 import Foundation let pi = 3.14159265359 print(String(format: "%f", pi)) (edited)

log5

@swift-5.2.5 import Foundation let pi = 3.14159265359 print(String(format: "%f", pi)) (edited)

3.141593 (edited)

@swift-main -warn-concurrency @_predatesConcurrency import Foundation func f<T: Sendable>(_: T) { } f(Date())

Iceman

@swift-main -warn-concurrency @_predatesConcurrency import Foundation func f<T: Sendable>(_: T) { } f(Date())

no output

@swift-5.6.3 -version

norio_nomura

@swift-5.6.3 -version

Swift version 5.6-dev (LLVM 64a4d678f114158, Swift 8ae983c3480462b) Target: x86_64-unknown-linux-gnu

@swift-5.5.3 @swift-5.6.3 @swift-main

import Foundation @propertyWrapper struct W<T>: Sendable where T: Sendable { var wrappedValue: T } struct S { @W var ok: Int @W var ng: Date } extension Date: @unchecked Sendable {}

(edited)

Iceman

@swift-5.5.3 @swift-5.6.3 @swift-main

import Foundation @propertyWrapper struct W<T>: Sendable where T: Sendable { var wrappedValue: T } struct S { @W var ok: Int @W var ng: Date } extension Date: @unchecked Sendable {}

(edited)

exit status: 134 with stderr:

swift-frontend: /home/buildnode/jenkins/workspace/oss-swift-5.5-package-linux-ubuntu-18_04/swift/lib/AST/ASTMangler.cpp:2217: void swift::Mangle::ASTMangler::appendProtocolName(const swift::ProtocolDecl *, bool): Assertion `AllowMarkerProtocols || !protocol->isMarkerProtocol()' failed. Please submit a bug report (https://swift.org/contributing/#reporting-bugs) and include the project and the crash backtrace. Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -new-driver-path /usr/bin/swift-driver -resource-dir /usr/lib/swift -module-name main 1. Swift version 5.5.2-dev (LLVM c315411fac10439, Swift ef1fbfd974df3ad) 2. 3. While running user code "<stdin>" 4. While evaluating request IRGenRequest(IR Generation for module main) 5. While emitting IR for source file <stdin> 6. While emitting field type metadata 'S' (at <stdin>:8:1) Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it): /usr/bin/swift-frontend[0x5c5ffb3] /usr/bin/swift-frontend[0x5c5dd0e] /usr/bin/swift-frontend[0x5c6033c] /lib/x86_64-linux-gnu/libpthread.so.0(+0x12980)[0x7f5109d5a980] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0xc7)[0x7f51085fcfb7] /lib/x86_64-linux-gnu/libc.so.6(abort+0x141)[0x7f51085fe921] /lib/x86_64-linux-gnu/libc.so.6(+0x3048a)[0x7f51085ee48a] /lib/x86_64-linux-gnu/libc.so.6(+0x30502)[0x7f51085ee502] /usr/bin/swift-frontend[0x181fed5] /usr/bin/swift-frontend[0x182c0f6] /usr/bin/swift-frontend[0x182903d] /usr/bin/swift-frontend[0x1827cf2] /usr/bin/swift-frontend[0x1826bde] /usr/bin/swift-frontend[0x1821b21] /usr/bin/swift-frontend[0xb239cd] /usr/bin/swift-frontend[0xb23bdf] /usr/bin/swift-frontend[0xacd38d] /usr/bin/swift-frontend[0xad1545] /usr/bin/swift-frontend[0xad4807] /usr/bin/swift-frontend[0xad4770] /usr/bin/swift-frontend[0x9ba13c] /usr/bin/swift-frontend[0xad436d] /usr/bin/swift-frontend[0xad416b] /usr

(edited)

Iceman

@swift-5.5.3 @swift-5.6.3 @swift-main

import Foundation @propertyWrapper struct W<T>: Sendable where T: Sendable { var wrappedValue: T } struct S { @W var ok: Int @W var ng: Date } extension Date: @unchecked Sendable {}

(edited)

exit status: 134 with stderr:

swift-frontend: /home/buildnode/jenkins/workspace/oss-swift-5.6-package-linux-ubuntu-18_04/swift/lib/AST/ASTMangler.cpp:2254: void swift::Mangle::ASTMangler::appendProtocolName(const swift::ProtocolDecl *, bool): Assertion `AllowMarkerProtocols || !protocol->isMarkerProtocol()' failed. Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -new-driver-path /usr/bin/swift-driver -resource-dir /usr/lib/swift -module-name main 1. Swift version 5.6-dev (LLVM 64a4d678f114158, Swift 8ae983c3480462b) 2. Compiling with the current language version 3. While running user code "<stdin>" 4. While evaluating request IRGenRequest(IR Generation for module main) 5. While emitting IR for source file <stdin> 6. While emitting field type metadata 'S' (at <stdin>:8:1) Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it): /usr/bin/swift-frontend[0x5fa3093] /usr/bin/swift-frontend[0x5fa0c3e] /usr/bin/swift-frontend[0x5fa3426] /lib/x86_64-linux-gnu/libpthread.so.0(+0x12980)[0x7f2b4bf89980] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0xc7)[0x7f2b4a217fb7] /lib/x86_64-linux-gnu/libc.so.6(abort+0x141)[0x7f2b4a219921] /lib/x86_64-linux-gnu/libc.so.6(+0x3048a)[0x7f2b4a20948a] /lib/x86_64-linux-gnu/libc.so.6(+0x30502)[0x7f2b4a209502] /usr/bin/swift-frontend[0x18b1185] /usr/bin/swift-frontend[0x18be316] /usr/bin/swift-frontend[0x18bb174] /usr/bin/swift-frontend[0x18b9db9] /usr/bin/swift-frontend[0x18b851e] /usr/bin/swift-frontend[0x18b2f55] /usr/bin/swift-frontend[0xb2e7dd] /usr/bin/swift-frontend[0xb2ea51] /usr/bin/swift-frontend[0xad4fdf] /usr/bin/swift-frontend[0xad9045] /usr/bin/swift-frontend[0xadc317] /usr/bin/swift-frontend[0xadc280] /usr/bin/swift-frontend[0x9bf88c] /usr/bin/swift-frontend[0xadbe7d] /usr/bin/swift-frontend[0xadbc7b] /usr/bin/swift-frontend[0xad9205] /usr/bin/swift-frontend[0xad7f29] /usr/bin/swift-front

(edited)

Iceman

@swift-5.5.3 @swift-5.6.3 @swift-main

import Foundation @propertyWrapper struct W<T>: Sendable where T: Sendable { var wrappedValue: T } struct S { @W var ok: Int @W var ng: Date } extension Date: @unchecked Sendable {}

(edited)

exit status: 134 with stderr:

swift-frontend: /home/buildnode/jenkins/workspace/oss-swift-package-linux-ubuntu-18_04/swift/lib/AST/ASTMangler.cpp:2287: void swift::Mangle::ASTMangler::appendProtocolName(const swift::ProtocolDecl *, bool): Assertion `AllowMarkerProtocols || !protocol->isMarkerProtocol()' failed. Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -new-driver-path /usr/bin/swift-driver -resource-dir /usr/lib/swift -module-name main 1. Swift version 5.6-dev (LLVM 7b20e61dd04138a, Swift 9438cf6b2e83c5f) 2. Compiling with the current language version 3. While running user code "<stdin>" 4. While evaluating request IRGenRequest(IR Generation for module main) 5. While emitting IR for source file <stdin> 6. While emitting field type metadata 'S' (at <stdin>:8:1) Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it): /usr/bin/swift-frontend[0x60543e3] /usr/bin/swift-frontend[0x6051f8e] /usr/bin/swift-frontend[0x6054776] /lib/x86_64-linux-gnu/libpthread.so.0(+0x12980)[0x7f7a34a14980] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0xc7)[0x7f7a32ca0fb7] /lib/x86_64-linux-gnu/libc.so.6(abort+0x141)[0x7f7a32ca2921] /lib/x86_64-linux-gnu/libc.so.6(+0x3048a)[0x7f7a32c9248a] /lib/x86_64-linux-gnu/libc.so.6(+0x30502)[0x7f7a32c92502] /usr/bin/swift-frontend[0x1951be5] /usr/bin/swift-frontend[0x195ef76] /usr/bin/swift-frontend[0x195bce2] /usr/bin/swift-frontend[0x195a909] /usr/bin/swift-frontend[0x195902e] /usr/bin/swift-frontend[0x19539b7] /usr/bin/swift-frontend[0x9cf0ad] /usr/bin/swift-frontend[0x9cf321] /usr/bin/swift-frontend[0x97563f] /usr/bin/swift-frontend[0x9796f1] /usr/bin/swift-frontend[0x97ca3c] /usr/bin/swift-frontend[0x97c990] /usr/bin/swift-frontend[0x85e4bc] /usr/bin/swift-frontend[0x97c58d] /usr/bin/swift-frontend[0x97c38b] /usr/bin/swift-frontend[0x9798f5] /usr/bin/swift-frontend[0x9785b9] /usr/bin/swift-frontend[

コンパイラクラッシャー

ww

https://github.com/apple/swift/blob/e6ec6877bc7c8166e8000ac7a0c76e5cde9b7d4b/lib/AST/ASTMangler.cpp#L2291

9:36 AM

わからん。そしてmacOSで再現しないからFondation.Dateの定義が関係してそう

そうなんですよ。macOSで再現しなくて、LinuxのCIで発覚しました

デバッグお疲れさまです…

5.5.1だといける

ほんとですね https://swiftfiddle.com/kxtc4wb4brbkpa6bst7ceangde

Swift Online Playground

SwiftFiddle is an online playground for creating, sharing and embedding Swift fiddles (little Swift programs that run directly in your browser).

9:47 AM

これか。確かにテストケースにNSObjectのケースが無い https://github.com/apple/swift/pull/39782

Don't emit marker protocols into runtime type metadata. by DougGreg...

Marker protocols don't exist at runtime, drop them when mangling a type for the purposes of runtime type metadata or reflection. Fixes rdar://82314404.

NSObjectかどうかじゃなくて、外からimportした型にextensionでSendable つけてるかどうかな気がするんですよね

レポートしたらシュッと直してくれないかな

かいてみた https://bugs.swift.org/browse/SR-15740

1

2

@swift-5.5.3 @swift-5.6.3 -warn-concurrency

protocol Animal: Sendable { associatedtype ID: Sendable } protocol P { func f<A: Animal>(type: A.Type, id: A.ID) async } actor Foo: P { func f<A: Animal>(type: A.Type, id: A.ID) async {} } actor Bar { func f<A: Animal>(type: A.Type, id: A.ID) async {} }

(edited)

Iceman

@swift-5.5.3 @swift-5.6.3 -warn-concurrency

protocol Animal: Sendable { associatedtype ID: Sendable } protocol P { func f<A: Animal>(type: A.Type, id: A.ID) async } actor Foo: P { func f<A: Animal>(type: A.Type, id: A.ID) async {} } actor Bar { func f<A: Animal>(type: A.Type, id: A.ID) async {} }

(edited)

no output

Iceman

@swift-5.5.3 @swift-5.6.3 -warn-concurrency

protocol Animal: Sendable { associatedtype ID: Sendable } protocol P { func f<A: Animal>(type: A.Type, id: A.ID) async } actor Foo: P { func f<A: Animal>(type: A.Type, id: A.ID) async {} } actor Bar { func f<A: Animal>(type: A.Type, id: A.ID) async {} }

(edited)

stderr:

<stdin>:10:10: warning: cannot pass argument of non-sendable type 'A.ID' across actors func f<A: Animal>(type: A.Type, id: A.ID) async {} ^

5.5.2のバグなのか

@swift-5.4.3

// may cause "Cannot convert value of type 'Int' to expected argument type 'Builtin.FPIEEE64'" import Foundation let (N, M, K) = {() -> (Int, Int, Int) in let v = readLine()!.split(separator:" ").map{Int($0)!} return (v[0], v[1], v[2]) }() guard N - M >= K else { print(1.0) exit(0) } let b: [Double] = stride(from: N, through: N - K + 2, by: -1) .map({ i -> Double in Double(i)}) .map({ e -> Double in Double(e - 1 - M) / e }) let hazure = b.reduce(1.0) { (partialResult: inout Double, v: Double) -> Double in partialResult * v } let atari: Double = Double(M) / Double(N - K + 1) print(hazure * atari)

log5

@swift-5.4.3

// may cause "Cannot convert value of type 'Int' to expected argument type 'Builtin.FPIEEE64'" import Foundation let (N, M, K) = {() -> (Int, Int, Int) in let v = readLine()!.split(separator:" ").map{Int($0)!} return (v[0], v[1], v[2]) }() guard N - M >= K else { print(1.0) exit(0) } let b: [Double] = stride(from: N, through: N - K + 2, by: -1) .map({ i -> Double in Double(i)}) .map({ e -> Double in Double(e - 1 - M) / e }) let hazure = b.reduce(1.0) { (partialResult: inout Double, v: Double) -> Double in partialResult * v } let atari: Double = Double(M) / Double(N - K + 1) print(hazure * atari)

exit status: 1 with stderr:

<stdin>:15:10: error: the compiler is unable to type-check this expression in reasonable time; try breaking up the expression into distinct sub-expressions .map({ e -> Double in Double(e - 1 - M) / e }) ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ <stdin>:16:28: error: cannot convert value of type '(inout Double, Double) -> Double' to expected argument type '(Double, Double) throws -> Double' let hazure = b.reduce(1.0) { (partialResult: inout Double, v: Double) -> Double in partialResult * v } ^

@swift-5.5.3 @swift-5.6.3

import Foundation struct S { @TaskLocal static var foo: Date? } extension Date: @unchecked Sendable {} print(S.foo ?? "nil")

(edited)

Iceman

@swift-5.5.3 @swift-5.6.3

import Foundation struct S { @TaskLocal static var foo: Date? } extension Date: @unchecked Sendable {} print(S.foo ?? "nil")

(edited)

exit status: 134 with stderr:

swift-frontend: /home/buildnode/jenkins/workspace/oss-swift-5.6-package-linux-ubuntu-18_04/swift/lib/AST/ASTMangler.cpp:2254: void swift::Mangle::ASTMangler::appendProtocolName(const swift::ProtocolDecl *, bool): Assertion `AllowMarkerProtocols || !protocol->isMarkerProtocol()' failed. Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -new-driver-path /usr/bin/swift-driver -resource-dir /usr/lib/swift -module-name main 1. Swift version 5.6-dev (LLVM 64a4d678f114158, Swift 8ae983c3480462b) 2. Compiling with the current language version 3. While running user code "<stdin>" 4. While evaluating request IRGenRequest(IR Generation for module main) 5. While emitting IR SIL function "@$s4main1SV4_foo33_1A61A3E7348A44FC8FF8726B26BEB4EDLL_WZ". for declaration 0xb2c3c68 (in module 'main') Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it): /usr/bin/swift-frontend[0x5fa3093] /usr/bin/swift-frontend[0x5fa0c3e] /usr/bin/swift-frontend[0x5fa3426] /lib/x86_64-linux-gnu/libpthread.so.0(+0x12980)[0x7f378e08d980] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0xc7)[0x7f378c31bfb7] /lib/x86_64-linux-gnu/libc.so.6(abort+0x141)[0x7f378c31d921] /lib/x86_64-linux-gnu/libc.so.6(+0x3048a)[0x7f378c30d48a] /lib/x86_64-linux-gnu/libc.so.6(+0x30502)[0x7f378c30d502] /usr/bin/swift-frontend[0x18b1185] /usr/bin/swift-frontend[0x18be316] /usr/bin/swift-frontend[0x18bb174] /usr/bin/swift-frontend[0x18b9db9] /usr/bin/swift-frontend[0x18b851e] /usr/bin/swift-frontend[0x18b2f55] /usr/bin/swift-frontend[0xb2e7dd] /usr/bin/swift-frontend[0xb2ea51] /usr/bin/swift-frontend[0xad4fdf] /usr/bin/swift-frontend[0x9b17e5] /usr/bin/swift-frontend[0x9b4ae4] /usr/bin/swift-frontend[0xb3bbf0] /usr/bin/swift-frontend[0xb3320b] /usr/bin/swift-frontend[0xb3034c] /usr/bin/swift-frontend[0xa2d3bb] /usr/bin/swift-frontend[0x95ad10] /usr/bin/swift-fro

(edited)

Iceman

@swift-5.5.3 @swift-5.6.3

import Foundation struct S { @TaskLocal static var foo: Date? } extension Date: @unchecked Sendable {} print(S.foo ?? "nil")

(edited)

nil (edited)

あれ、実行時エラーじゃなくてコンパイラのクラッシュになった

4:19 AM

5.5と5.6で挙動違うし、macとLinuxでも挙動違っててわけわからん

4:21 AM

~~Linuxにおけるコンパイラのクラッシュは https://discord.com/channels/291054398077927425/430242233468452865/932567619192619040 と同じか？~~ 5.5.2コンパイラがクラッシュしてないので微妙に違いそう (edited)

5.5と5.6で挙動違うし、macとLinuxでも挙動違っててわけわからん

多彩なバグだな

@swift-5.6.3 @swift-5.5.3 struct Links: Codable { let `self`: String init(self aSelf: String) { self.`self` = aSelf } } (edited)

nanasi

@swift-5.6.3 @swift-5.5.3 struct Links: Codable { let `self`: String init(self aSelf: String) { self.`self` = aSelf } } (edited)

stderr:

<unknown>:0: warning: 'self' refers to the method 'Links.CodingKeys.self', which may be unexpected <unknown>:0: note: use 'Links.CodingKeys.self' to silence this warning <unknown>:0: warning: 'self' refers to the method 'Links.self', which may be unexpected <unknown>:0: note: use 'Links.self' to silence this warning <unknown>:0: warning: 'self' refers to the method 'Links.self', which may be unexpected <unknown>:0: note: use 'Links.self' to silence this warning

(edited)

nanasi

@swift-5.6.3 @swift-5.5.3 struct Links: Codable { let `self`: String init(self aSelf: String) { self.`self` = aSelf } } (edited)

no output

@swift-5.6.3 @swift-5.5.3 struct Links: Codable { let `self`: String }

nanasi

@swift-5.6.3 @swift-5.5.3 struct Links: Codable { let `self`: String }

no output

nanasi

@swift-5.6.3 @swift-5.5.3 struct Links: Codable { let `self`: String }

stderr:

<unknown>:0: warning: 'self' refers to the method 'Links.CodingKeys.self', which may be unexpected <unknown>:0: note: use 'Links.CodingKeys.self' to silence this warning <unknown>:0: warning: 'self' refers to the method 'Links.self', which may be unexpected <unknown>:0: note: use 'Links.self' to silence this warning <unknown>:0: warning: 'self' refers to the method 'Links.self', which may be unexpected <unknown>:0: note: use 'Links.self' to silence this warning

@swift-5.6.3 @swift-5.5.3

import Foundation @propertyWrapper struct Wrapper { var wrappedValue: Int? var projectedValue: String? init(wrappedValue: Int?) { self.wrappedValue = wrappedValue } init(projectedValue: String?) { self.projectedValue = projectedValue } } func foo(@Wrapper value: Int?) { print(value) } foo(value: 100) foo($value: "string")

nanasi

@swift-5.6.3 @swift-5.5.3

import Foundation @propertyWrapper struct Wrapper { var wrappedValue: Int? var projectedValue: String? init(wrappedValue: Int?) { self.wrappedValue = wrappedValue } init(projectedValue: String?) { self.projectedValue = projectedValue } } func foo(@Wrapper value: Int?) { print(value) } foo(value: 100) foo($value: "string")

Optional(100) nilstderr:

<stdin>:18:9: warning: expression implicitly coerced from 'Int?' to 'Any' print(value) ^~~~~ <stdin>:18:9: note: provide a default value to avoid this warning print(value) ^~~~~ ?? <#default value#> <stdin>:18:9: note: force-unwrap the value to avoid this warning print(value) ^~~~~ ! <stdin>:18:9: note: explicitly cast to 'Any' with 'as Any' to silence this warning print(value) ^~~~~ as Any

nanasi

@swift-5.6.3 @swift-5.5.3

import Foundation @propertyWrapper struct Wrapper { var wrappedValue: Int? var projectedValue: String? init(wrappedValue: Int?) { self.wrappedValue = wrappedValue } init(projectedValue: String?) { self.projectedValue = projectedValue } } func foo(@Wrapper value: Int?) { print(value) } foo(value: 100) foo($value: "string")

exit status: 1 with stderr:

<stdin>:21:1: error: type of expression is ambiguous without more context foo(value: 100) ^~~~~~~~~~~~~~~ <stdin>:18:9: warning: expression implicitly coerced from 'Int?' to 'Any' print(value) ^~~~~ <stdin>:18:9: note: provide a default value to avoid this warning print(value) ^~~~~ ?? <#default value#> <stdin>:18:9: note: force-unwrap the value to avoid this warning print(value) ^~~~~ ! <stdin>:18:9: note: explicitly cast to 'Any' with 'as Any' to silence this warning print(value) ^~~~~ as Any

@swift-5.5.3 -version

norio_nomura

@swift-5.5.3 -version

Swift version 5.5.3 (swift-5.5.3-RELEASE) Target: x86_64-unknown-linux-gnu

1

@swift-5.6.3

import Foundation struct S { @TaskLocal static var foo: Date? } extension Date: @unchecked Sendable {} print(S.foo ?? "nil")

Iceman

@swift-5.6.3

import Foundation struct S { @TaskLocal static var foo: Date? } extension Date: @unchecked Sendable {} print(S.foo ?? "nil")

exit status: 134 with stderr:

swift-frontend: /home/buildnode/jenkins/workspace/oss-swift-5.6-package-linux-ubuntu-18_04/swift/lib/AST/ASTMangler.cpp:2256: void swift::Mangle::ASTMangler::appendProtocolName(const swift::ProtocolDecl *, bool): Assertion `AllowMarkerProtocols || !protocol->isMarkerProtocol()' failed. Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -new-driver-path /usr/bin/swift-driver -resource-dir /usr/lib/swift -module-name main 1. Swift version 5.6-dev (LLVM 62b900d3d0d5be9, Swift ce64fe8867792d4) 2. Compiling with the current language version 3. While running user code "<stdin>" 4. While evaluating request IRGenRequest(IR Generation for module main) 5. While emitting IR SIL function "@$s4main1SV4_foo33_1A61A3E7348A44FC8FF8726B26BEB4EDLL_WZ". for declaration 0xb52a178 (in module 'main') Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it): /usr/bin/swift-frontend[0x5fa5913] /usr/bin/swift-frontend[0x5fa34be] /usr/bin/swift-frontend[0x5fa5ca6] /lib/x86_64-linux-gnu/libpthread.so.0(+0x12980)[0x7f04a53ea980] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0xc7)[0x7f04a3675fb7] /lib/x86_64-linux-gnu/libc.so.6(abort+0x141)[0x7f04a3677921] /lib/x86_64-linux-gnu/libc.so.6(+0x3048a)[0x7f04a366748a] /lib/x86_64-linux-gnu/libc.so.6(+0x30502)[0x7f04a3667502] /usr/bin/swift-frontend[0x18b2295] /usr/bin/swift-frontend[0x18bf416] /usr/bin/swift-frontend[0x18bc204] /usr/bin/swift-frontend[0x18bae49] /usr/bin/swift-frontend[0x18b95ae] /usr/bin/swift-frontend[0x18b4065] /usr/bin/swift-frontend[0xb2e76d] /usr/bin/swift-frontend[0xb2e9e1] /usr/bin/swift-frontend[0xad4e6f] /usr/bin/swift-frontend[0x9b1875] /usr/bin/swift-frontend[0x9b4b74] /usr/bin/swift-frontend[0xb3bc80] /usr/bin/swift-frontend[0xb3329b] /usr/bin/swift-frontend[0xb303dc] /usr/bin/swift-frontend[0xa2d3db] /usr/bin/swift-frontend[0x95ae10] /usr/bin/swift-fro

@swift-5.5.3 @swift-5.6.3 import Foundation enum Foo: Codable { case aaa(_ foo: Int, _ bar: String) } (edited)

Iceman

@swift-5.5.3 @swift-5.6.3 import Foundation enum Foo: Codable { case aaa(_ foo: Int, _ bar: String) } (edited)

no output (edited)

Iceman

@swift-5.5.3 @swift-5.6.3 import Foundation enum Foo: Codable { case aaa(_ foo: Int, _ bar: String) } (edited)

exit status: 1 with stderr:<unknown>:0: error: type 'Foo' has no member 'aaa(foo:bar:)'

@swift-5.2.5 @swift-5.5.3 -enable-library-evolution @usableFromInline struct S { @usableFromInline var v: [Int] @inlinable init() { self.v = [] } } (edited)

Iceman

@swift-5.2.5 @swift-5.5.3 -enable-library-evolution @usableFromInline struct S { @usableFromInline var v: [Int] @inlinable init() { self.v = [] } } (edited)

exit status: 1 with stderr:

<stdin>:8:12: error: 'self' used before 'self.init' call or assignment to 'self' self.v = [] ^ <stdin>:9:3: error: 'self.init' isn't called on all paths before returning from initializer } ^

Iceman

@swift-5.2.5 @swift-5.5.3 -enable-library-evolution @usableFromInline struct S { @usableFromInline var v: [Int] @inlinable init() { self.v = [] } } (edited)

exit status: 1 with stderr:

<stdin>:8:12: error: 'self' used before 'self.init' call or assignment to 'self' self.v = [] ^ <stdin>:9:3: error: 'self.init' isn't called on all paths before returning from initializer } ^

@swift-5.6.3 class C {} @propertyWrapper struct S<T: C> { var wrappedValue: T? } protocol P {} struct Impl { @S var value: (C & P)? }

nanasi

@swift-5.6.3 class C {} @propertyWrapper struct S<T: C> { var wrappedValue: T? } protocol P {} struct Impl { @S var value: (C & P)? }

no output

@swift-5.5.3 @swift-5.6.3 -warn-concurrency

@MainActor(unsafe) class View { init() {} var foo = 0 } @MainActor final class MyView: View { override init() { super.init() foo = 2 } }

(edited)

Iceman

@swift-5.5.3 @swift-5.6.3 -warn-concurrency

@MainActor(unsafe) class View { init() {} var foo = 0 } @MainActor final class MyView: View { override init() { super.init() foo = 2 } }

(edited)

no output (edited)

@swift-5.5.3 @MainActor struct View { } func nonIsolated() { _ = View() } (edited)

Yuta Saito

@swift-5.5.3 @MainActor struct View { } func nonIsolated() { _ = View() } (edited)

exit status: 1 with stderr:

<stdin>:5:7: error: call to main actor-isolated initializer 'init()' in a synchronous nonisolated context _ = View() ^ <stdin>:1:19: note: calls to initializer 'init()' from outside of its actor context are implicitly asynchronous @MainActor struct View { ^ <stdin>:4:6: note: add '@MainActor' to make global function 'nonIsolated()' part of global actor 'MainActor' func nonIsolated() { ^ @MainActor

(edited)

@swift-5.5.3 @MainActor struct View { init() {} } func nonIsolated() { _ = View() }

Yuta Saito

@swift-5.5.3 @MainActor struct View { init() {} } func nonIsolated() { _ = View() }

exit status: 1 with stderr:

<stdin>:6:7: error: call to main actor-isolated initializer 'init()' in a synchronous nonisolated context _ = View() ^ <stdin>:2:3: note: calls to initializer 'init()' from outside of its actor context are implicitly asynchronous init() {} ^ <stdin>:5:6: note: add '@MainActor' to make global function 'nonIsolated()' part of global actor 'MainActor' func nonIsolated() { ^ @MainActor

なんかXcodeと違うな

やはりObjC Interopの検証のためにUIKitのヘッダbotに欲しいな

Iceman

@swift-5.5.3 @swift-5.6.3 -warn-concurrency

@MainActor(unsafe) class View { init() {} var foo = 0 } @MainActor final class MyView: View { override init() { super.init() foo = 2 } }

(edited)

no output

@swift-5.5.3 -warn-concurrency @MainActor @objc class View { init() {} } func nonIsolated() { _ = View() } (edited)

Iceman

@swift-5.5.3 -warn-concurrency @MainActor @objc class View { init() {} } func nonIsolated() { _ = View() } (edited)

exit status: 1 with stderr:

<stdin>:1:13: error: Objective-C interoperability is disabled @MainActor @objc class View { ~^~~~~ <stdin>:6:7: error: call to main actor-isolated initializer 'init()' in a synchronous nonisolated context _ = View() ^ <stdin>:2:3: note: calls to initializer 'init()' from outside of its actor context are implicitly asynchronous init() {} ^ <stdin>:5:6: note: add '@MainActor' to make global function 'nonIsolated()' part of global actor 'MainActor' func nonIsolated() { ^ @MainActor

(edited)

ObjC Interop特有で謎挙動してるとかだとキツいな

@swift-5.6.3 @MainActor(unsafe) struct View { init() {} } func nonIsoalted() { _ = View() }

Yuta Saito

@swift-5.6.3 @MainActor(unsafe) struct View { init() {} } func nonIsoalted() { _ = View() }

no output

いや、ObjC Interopじゃなくて普通にMainActor(unsafe)が原因じゃないですかね

お？ https://twitter.com/iceman5499/status/1501444984255352836

Iceman (@iceman5499)

@omochimetaru @kateinoigakukun @mainactor と思って(unsafe)つけたりもしましたが、変わらなかったようです https://t.co/jDx3VwOYGZ

6:39 AM

↑そうではないのかと思って見てた

https://discord.com/channels/291054398077927425/430242233468452865/951000426382258178

6:40 AM

これUIKitと同じだとしたらMyViewのほうのinit怒られるべきに思うんですよね

initのオーバーライドの状況とか結構違う気がしていて、

6:48 AM

ちょっとその辺再現するのを試しています

1

~~あれ、そもそもなんでこれはoverride initじゃないんだ？~~ いや、UIView.init()はdesignatedじゃ無いのか

 class MyView: UIView { init() { super.init(frame: .zero) } required init?(coder: NSCoder) { fatalError("init(coder:) has not been implemented") } }

(edited)

@swift-5.6.3

import Foundation let dateS = "2022-03-08T15:00:00.000Z" let f = ISO8601DateFormatter() var c = Calendar(identifier: .gregorian) c.timeZone = .init(secondsFromGMT: 9 * 3600)! let todayDay = c.component(.day, from: f.date(from: dateS)!) print(todayDay)

(edited)

Iceman

@swift-5.6.3

import Foundation let dateS = "2022-03-08T15:00:00.000Z" let f = ISO8601DateFormatter() var c = Calendar(identifier: .gregorian) c.timeZone = .init(secondsFromGMT: 9 * 3600)! let todayDay = c.component(.day, from: f.date(from: dateS)!) print(todayDay)

(edited)

exit status: 132 with stderr:

main/<stdin>:9: Fatal error: Unexpectedly found nil while unwrapping an Optional value Current stack trace: 0 libswiftCore.so 0x00007f40da08a920 _swift_stdlib_reportFatalErrorInFile + 112 1 libswiftCore.so 0x00007f40d9d822f1 <unavailable> + 1417969 2 libswiftCore.so 0x00007f40d9d82016 <unavailable> + 1417238 3 libswiftCore.so 0x00007f40d9d81e0a <unavailable> + 1416714 4 libswiftCore.so 0x00007f40d9d81840 _assertionFailure(_:_:file:line:flags:) + 315 6 swift-frontend 0x000000000068ff2a <unavailable> + 2686762 7 swift-frontend 0x0000000000547e4c <unavailable> + 1343052 8 swift-frontend 0x0000000000509396 <unavailable> + 1086358 9 swift-frontend 0x0000000000508a90 <unavailable> + 1084048 10 swift-frontend 0x00000000004fd2a4 <unavailable> + 1036964 11 swift-frontend 0x00000000004b3814 <unavailable> + 735252 12 libc.so.6 0x00007f40d86c3ba0 __libc_start_main + 231 13 swift-frontend 0x00000000004b326a <unavailable> + 733802 Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -new-driver-path /usr/bin/swift-driver -resource-dir /usr/lib/swift -module-name main 1. Swift version 5.6-dev (LLVM 016ddf3ba9bf6cf, Swift a43b04fe3d5feea) 2. Compiling with the current language version 3. While running user code "<stdin>" Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it): /usr/bin/swift-frontend[0x5fa5993] /usr/bin/swift-frontend[0x5fa353e] /usr/bin/swift-frontend[0x5fa5d26] /lib/x86_64-linux-gnu/libpthread.so.0(+0x12980)[0x7f40da455980] /usr/lib/swift/linux/libswiftCore.so(+0x15a2f5)[0x7f40d9d822f5] /usr/lib/swift/l

(edited)

@swift-5.6.3

import Foundation let dateS = "2022-03-08T15:00:00.000Z" let f = ISO8601DateFormatter() var c = Calendar(identifier: .gregorian) // c.timeZone = .init(secondsFromGMT: 9 * 3600)! let todayDay = c.component(.day, from: f.date(from: dateS)!) print(todayDay)

Iceman

@swift-5.6.3

import Foundation let dateS = "2022-03-08T15:00:00.000Z" let f = ISO8601DateFormatter() var c = Calendar(identifier: .gregorian) // c.timeZone = .init(secondsFromGMT: 9 * 3600)! let todayDay = c.component(.day, from: f.date(from: dateS)!) print(todayDay)

exit status: 132 with stderr:

main/<stdin>:9: Fatal error: Unexpectedly found nil while unwrapping an Optional value Current stack trace: 0 libswiftCore.so 0x00007f29a022e920 _swift_stdlib_reportFatalErrorInFile + 112 1 libswiftCore.so 0x00007f299ff262f1 <unavailable> + 1417969 2 libswiftCore.so 0x00007f299ff26016 <unavailable> + 1417238 3 libswiftCore.so 0x00007f299ff25e0a <unavailable> + 1416714 4 libswiftCore.so 0x00007f299ff25840 _assertionFailure(_:_:file:line:flags:) + 315 6 swift-frontend 0x000000000068ff2a <unavailable> + 2686762 7 swift-frontend 0x0000000000547e4c <unavailable> + 1343052 8 swift-frontend 0x0000000000509396 <unavailable> + 1086358 9 swift-frontend 0x0000000000508a90 <unavailable> + 1084048 10 swift-frontend 0x00000000004fd2a4 <unavailable> + 1036964 11 swift-frontend 0x00000000004b3814 <unavailable> + 735252 12 libc.so.6 0x00007f299e867ba0 __libc_start_main + 231 13 swift-frontend 0x00000000004b326a <unavailable> + 733802 Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -new-driver-path /usr/bin/swift-driver -resource-dir /usr/lib/swift -module-name main 1. Swift version 5.6-dev (LLVM 016ddf3ba9bf6cf, Swift a43b04fe3d5feea) 2. Compiling with the current language version 3. While running user code "<stdin>" Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it): /usr/bin/swift-frontend[0x5fa5993] /usr/bin/swift-frontend[0x5fa353e] /usr/bin/swift-frontend[0x5fa5d26] /lib/x86_64-linux-gnu/libpthread.so.0(+0x12980)[0x7f29a05f9980] /usr/lib/swift/linux/libswiftCore.so(+0x15a2f5)[0x7f299ff262f5] /usr/lib/swift/l

! でのクラッシュってこんなにうるさかったっけ (edited)

7:25 AM

@swift-5.6.3 let todayDay: Int? = nil print(todayDay!)

Iceman

@swift-5.6.3 let todayDay: Int? = nil print(todayDay!)

exit status: 132 with stderr:

main/<stdin>:2: Fatal error: Unexpectedly found nil while unwrapping an Optional value Current stack trace: 0 libswiftCore.so 0x00007fd0572de920 _swift_stdlib_reportFatalErrorInFile + 112 1 libswiftCore.so 0x00007fd056fd62f1 <unavailable> + 1417969 2 libswiftCore.so 0x00007fd056fd6016 <unavailable> + 1417238 3 libswiftCore.so 0x00007fd056fd5e0a <unavailable> + 1416714 4 libswiftCore.so 0x00007fd056fd5840 _assertionFailure(_:_:file:line:flags:) + 315 6 swift-frontend 0x000000000068ff2a <unavailable> + 2686762 7 swift-frontend 0x0000000000547e4c <unavailable> + 1343052 8 swift-frontend 0x0000000000509396 <unavailable> + 1086358 9 swift-frontend 0x0000000000508a90 <unavailable> + 1084048 10 swift-frontend 0x00000000004fd2a4 <unavailable> + 1036964 11 swift-frontend 0x00000000004b3814 <unavailable> + 735252 12 libc.so.6 0x00007fd055917ba0 __libc_start_main + 231 13 swift-frontend 0x00000000004b326a <unavailable> + 733802 Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -new-driver-path /usr/bin/swift-driver -resource-dir /usr/lib/swift -module-name main 1. Swift version 5.6-dev (LLVM 016ddf3ba9bf6cf, Swift a43b04fe3d5feea) 2. Compiling with the current language version 3. While running user code "<stdin>" Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it): /usr/bin/swift-frontend[0x5fa5993] /usr/bin/swift-frontend[0x5fa353e] /usr/bin/swift-frontend[0x5fa5d26] /lib/x86_64-linux-gnu/libpthread.so.0(+0x12980)[0x7fd0576a9980] /usr/lib/swift/linux/libswiftCore.so(+0x15a2f5)[0x7fd056fd62f5] /usr/lib/swift/l

Iceman

これUIKitと同じだとしたらMyViewのほうのinit怒られるべきに思うんですよね

やっぱりObjC Interopでした。失礼しました（手のひらクルー）

1

7:37 AM

最小再現コード https://github.com/kateinoigakukun/SR-GAInheritance

GitHub - kateinoigakukun/SR-GAInheritance

Contribute to kateinoigakukun/SR-GAInheritance development by creating an account on GitHub.

ミソは、

ObjC上で定義された型（View）が、親のnon-isolated initializer（Base.init(tag: ())）を持つこと
Base.init(tag: ()) がActor Isolatedでないこと
Swift上で View を継承した型（ MyView）でinit(tag: ()) を定義すると、 Base.init(tag: ()) のActor情報を引き継ぐこと

(edited)

Yuta Saito

ミソは、

ObjC上で定義された型（View）が、親のnon-isolated initializer（Base.init(tag: ())）を持つこと
Base.init(tag: ()) がActor Isolatedでないこと
Swift上で View を継承した型（ MyView）でinit(tag: ()) を定義すると、 Base.init(tag: ()) のActor情報を引き継ぐこと

(edited)

ObjC側での継承が関係してるのか、ややこしいｗ

@swift-5.6.3 func foo() -> Optional<some Equatable> { return .some(100) }

nanasi

@swift-5.6.3 func foo() -> Optional<some Equatable> { return .some(100) }

no output

@swift-5.6.3 enum MyOptional<Wrapped> { case some(Wrapped) case none } func foo() -> MyOptional<some Equatable> { return .some(100) }

nanasi

@swift-5.6.3 enum MyOptional<Wrapped> { case some(Wrapped) case none } func foo() -> MyOptional<some Equatable> { return .some(100) }

exit status: 139 with stderr:

Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -new-driver-path /usr/bin/swift-driver -resource-dir /usr/lib/swift -module-name main 1. Swift version 5.6-dev (LLVM 016ddf3ba9bf6cf, Swift a43b04fe3d5feea) 2. Compiling with the current language version 3. While evaluating request ASTLoweringRequest(Lowering AST to SIL for module main) Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it): /usr/bin/swift-frontend[0x5fa5993] /usr/bin/swift-frontend[0x5fa353e] /usr/bin/swift-frontend[0x5fa5d26] /lib/x86_64-linux-gnu/libpthread.so.0(+0x12980)[0x7fcebcb85980] /usr/bin/swift-frontend[0x4b5ef0] /usr/bin/swift-frontend[0x5f8372c] /usr/bin/swift-frontend[0x1e48e60] /usr/bin/swift-frontend[0x1e480c6] /usr/bin/swift-frontend[0x18b7f21] /usr/bin/swift-frontend[0x18af8b8] /usr/bin/swift-frontend[0x18b8c5c] /usr/bin/swift-frontend[0x18b376a] /usr/bin/swift-frontend[0x18b9460] /usr/bin/swift-frontend[0x18b40d7] /usr/bin/swift-frontend[0x18bcc94] /usr/bin/swift-frontend[0x18b7105] /usr/bin/swift-frontend[0x18af8c8] /usr/bin/swift-frontend[0x18b8c5c] /usr/bin/swift-frontend[0x18b376a] /usr/bin/swift-frontend[0x18b9460] /usr/bin/swift-frontend[0x18b40d7] /usr/bin/swift-frontend[0x18bcc94] /usr/bin/swift-frontend[0x18b7105] /usr/bin/swift-frontend[0x18af8c8] /usr/bin/swift-frontend[0x18b8c5c] /usr/bin/swift-frontend[0x18b376a] /usr/bin/swift-frontend[0x18b9460] /usr/bin/swift-frontend[0x18b40d7] /usr/bin/swift-frontend[0x18bcc94] /usr/bin/swift-frontend[0x18b7105] /usr/bin/swift-frontend[0x18af8c8] /usr/bin/swift-frontend[0x18b8c5c] /usr/bin/swift-frontend[0x18b376a] /usr/bin/swift-frontend[0x18b9460] /usr/bin/swift-frontend[0x18b40d7] /usr/bin/swift-frontend[0x18bcc94] /usr/bin/swift-frontend[0x18b7105] /usr/bin/swift-frontend[0x18af8c8] /usr/bin/swift-frontend[0x18b8c5c] /usr/bin/swift-frontend[0x18b376a]

@swift-5.2.5

import Foundation func proc(count: Int, idx: Int) { var st = Set<Int>() for i in 0..<count { st.insert(i) } let mid = count >> 1 let start = Date() st.remove(mid) let elapsed = Date().timeIntervalSince(start) print(idx, elapsed) } for d in 1...7 { let c = (pow(10, d) as NSDecimalNumber).intValue proc(count: c, idx: d) }

log5

@swift-5.2.5

import Foundation func proc(count: Int, idx: Int) { var st = Set<Int>() for i in 0..<count { st.insert(i) } let mid = count >> 1 let start = Date() st.remove(mid) let elapsed = Date().timeIntervalSince(start) print(idx, elapsed) } for d in 1...7 { let c = (pow(10, d) as NSDecimalNumber).intValue proc(count: c, idx: d) }

1 4.0531158447265625e-06 2 9.5367431640625e-07 3 0.0 4 9.5367431640625e-07 5 2.0265579223632812e-06 6 1.0728836059570312e-06 7 2.0265579223632812e-06

そろそろswift-5.7ボットを用意する時期。順当に行くと 4.2.4のインスタンスを再利用だけど、メジャーバージョン違いは残した方が良い気も

(edited)

4.x系の最終版だけ残すで十分な気がします。実際どれくらい使われてるんだろ

10:09 AM

ああ、4.0系と4.1系はもう居ないのか

そう。それらは非常駐型botにしようと考えてたけど未着手。

10:17 AM

もう複数の過去バージョンを維持する必要はなくて、最新リリース版とmainスナップショット版だけで良い気もする。 (edited)

1

10:22 AM

最新リリース版インスタンスは、マイナーバージョン毎にボットアカウントを切り替えることで、過去ログでも大まかにバージョンがわかる様にする。 (edited)

@swift-5.0.3 --swift-version 4.2 print("Hello")

koher

@swift-5.0.3 --swift-version 4.2 print("Hello")

exit status: 1 with stderr:<unknown>:0: error: unknown argument: '--swift-version'

1

ハイフン１つじゃない？

@swift-5.0.3 -help

omochimetaru

@swift-5.0.3 -help

OVERVIEW: Swift compiler USAGE: swift [options] <inputs> OPTIONS: -assert-config <value> Specify the assert_configuration replacement. Possible values are Debug, Release, Unchecked, DisableReplacement. -continue-building-after-errors Continue building, even after errors are encountered -debug-info-format=<value> Specify the debug info format type to either 'dwarf' or 'codeview' -debug-info-store-invocation Emit the compiler invocation in the debug info. -debug-prefix-map <value> Remap source paths in debug info -D <value> Marks a conditional compilation flag as true -enforce-exclusivity=<enforcement> Enforce law of exclusivity -framework <value> Specifies a framework which should be linked against -Fsystem <value> Add directory to system framework search path -F <value> Add directory to framework search path -gdwarf-types Emit full DWARF type info. -gline-tables-only Emit minimal debug info for backtraces only -gnone Don't emit debug info -g Emit debug info. This is the preferred setting for debugging with LLDB. -help Display available options -index-store-path <path> Store indexing data to <path> -I <value> Add directory to the import search path -j <n> Number of commands to execute in parallel -L <value> Add directory to library link search path -l<value> Specifies a library which should be linked against -module-cache-path <value> Specifies the Clang module cache path -module-link-name <value> Library to link against when using this module -module-name <value> Name of the module to build -nostdimport Don't search the standard

@swift-5.0.3 -Xfrontend --swift-version -Xfrontend 4.2 print(1) (edited)

omochimetaru

@swift-5.0.3 -Xfrontend --swift-version -Xfrontend 4.2 print(1) (edited)

exit status: 1 with stderr:<unknown>:0: error: unknown argument: '--swift-version' (edited)

@swift-5.0.3 -swift-version 4.2 print(2)

omochimetaru

@swift-5.0.3 -swift-version 4.2 print(2)

2

お

おお、岸川さんが正しかった

@swift-5.0.3 -swift-version 4.2 #if swift(5.0) print(5) #else print(4) #endif

omochimetaru

@swift-5.0.3 -swift-version 4.2 #if swift(5.0) print(5) #else print(4) #endif

exit status: 1 with stderr:

<stdin>:1:11: error: unexpected platform condition argument: expected a unary comparison '>=' or '<'; for example, '>=2.2' or '<2.2' #if swift(5.0) ^

https://github.com/apple/swift-evolution/blob/main/proposals/0212-compiler-version-directive.md の --swift-version は一体？？

1

@swift-5.5.3 -swift-version 6 print(42)

koher

@swift-5.5.3 -swift-version 6 print(42)

exit status: 1 with stderr:

<unknown>:0: error: invalid value '6' in '-swift-version 6' <unknown>:0: note: valid arguments to '-swift-version' are '4', '4.2', '5'

@swift-main -swift-version 6 print(42)

koher

@swift-main -swift-version 6 print(42)

42

ボットを更新しようとしたら、Herokuがsecurity incidentからまだ復旧してなくてGitHubからの自動deployも止まったままだったのでまた今度に。 https://status.heroku.com/incidents/2413

Heroku Status

Heroku Status provides the current status and incident history report for the Heroku platform.

1

@swift-5.5.3 @swift-main

class Foo { func bar(v: Int) { print("bar: \(v)") } } protocol FooProtocol: Foo {} extension Foo: FooProtocol {} func f() { let foo = Foo() FooProtocol.bar(foo)(v: 1) }

(edited)

Iceman

@swift-5.5.3 @swift-main

class Foo { func bar(v: Int) { print("bar: \(v)") } } protocol FooProtocol: Foo {} extension Foo: FooProtocol {} func f() { let foo = Foo() FooProtocol.bar(foo)(v: 1) }

(edited)

exit status: 134 with stderr:

not existential UNREACHABLE executed at /home/build-user/swift/lib/SILGen/SILGenConvert.cpp:992! Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -new-driver-path /usr/bin/swift-driver -empty-abi-descriptor -resource-dir /usr/lib/swift -module-name main 1. Swift version 5.7-dev (LLVM aac709978dda363, Swift 8c308d0ff137dde) 2. Compiling with the current language version 3. While evaluating request ASTLoweringRequest(Lowering AST to SIL for module main) 4. While silgen emitFunction SIL function "@$s4main1fyyF". for 'f()' (at <stdin>:8:1) Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it): /usr/bin/swift-frontend[0x62f7253] /usr/bin/swift-frontend[0x62f4dfe] /usr/bin/swift-frontend[0x62f75e6] /lib/x86_64-linux-gnu/libpthread.so.0(+0x12980)[0x7f89645e5980] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0xc7)[0x7f8962858e87] /lib/x86_64-linux-gnu/libc.so.6(abort+0x141)[0x7f896285a7f1] /usr/bin/swift-frontend[0x622c8f6] /usr/bin/swift-frontend[0xc7ac93] /usr/bin/swift-frontend[0xca27db] /usr/bin/swift-frontend[0xcb2a17] /usr/bin/swift-frontend[0xca6321] /usr/bin/swift-frontend[0xc98839] /usr/bin/swift-frontend[0xd55d00] /usr/bin/swift-frontend[0xd3a9d6] /usr/bin/swift-frontend[0xd3a6ed] /usr/bin/swift-frontend[0xca3d14] /usr/bin/swift-frontend[0xc98839] /usr/bin/swift-frontend[0xd55d00] /usr/bin/swift-frontend[0xd3a9d6] /usr/bin/swift-frontend[0xd3a6ed] /usr/bin/swift-frontend[0xca3d14] /usr/bin/swift-frontend[0xc98c7e] /usr/bin/swift-frontend[0xd08eb3] /usr/bin/swift-frontend[0xd0872d] /usr/bin/swift-frontend[0xcbc3ac] /usr/bin/swift-frontend[0xc4e952] /usr/bin/swift-frontend[0xc50cc0] /usr/bin/swift-frontend[0xc4ca87] /usr/bin/swift-frontend[0xc53a24] /usr/bin/swift-frontend[0xd08142] /usr/bin/swift-frontend[0xc57de6] /usr/bin/swift-frontend[0xc54f54] /usr/bin/swift-frontend[0x5c7b4e] /usr/bin/sw

Iceman

@swift-5.5.3 @swift-main

class Foo { func bar(v: Int) { print("bar: \(v)") } } protocol FooProtocol: Foo {} extension Foo: FooProtocol {} func f() { let foo = Foo() FooProtocol.bar(foo)(v: 1) }

(edited)

exit status: 134 with stderr:

not existential UNREACHABLE executed at /home/buildnode/jenkins/workspace/oss-swift-5.5-package-linux-ubuntu-18_04/swift/lib/SILGen/SILGenConvert.cpp:984! Please submit a bug report (https://swift.org/contributing/#reporting-bugs) and include the project and the crash backtrace. Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -new-driver-path /usr/bin/swift-driver -resource-dir /usr/lib/swift -module-name main 1. Swift version 5.5.3 (swift-5.5.3-RELEASE) 2. 3. While evaluating request ASTLoweringRequest(Lowering AST to SIL for module main) 4. While silgen emitFunction SIL function "@$s4main1fyyF". for 'f()' (at <stdin>:8:1) Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it): /usr/bin/swift-frontend[0x5c5feb3] /usr/bin/swift-frontend[0x5c5dc0e] /usr/bin/swift-frontend[0x5c6023c] /lib/x86_64-linux-gnu/libpthread.so.0(+0x12980)[0x7f05c44b9980] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0xc7)[0x7f05c2d5be87] /lib/x86_64-linux-gnu/libc.so.6(abort+0x141)[0x7f05c2d5d7f1] /usr/bin/swift-frontend[0x5ba1536] /usr/bin/swift-frontend[0xce721e] /usr/bin/swift-frontend[0xd0793b] /usr/bin/swift-frontend[0xd17277] /usr/bin/swift-frontend[0xd0a9d0] /usr/bin/swift-frontend[0xcfe2c9] /usr/bin/swift-frontend[0xdbba62] /usr/bin/swift-frontend[0xd9fda9] /usr/bin/swift-frontend[0xd08e14] /usr/bin/swift-frontend[0xcfe2c9] /usr/bin/swift-frontend[0xdbba62] /usr/bin/swift-frontend[0xd9fda9] /usr/bin/swift-frontend[0xd08e14] /usr/bin/swift-frontend[0xcfe749] /usr/bin/swift-frontend[0xd71be4] /usr/bin/swift-frontend[0xd71a0d] /usr/bin/swift-frontend[0xd20fe5] /usr/bin/swift-frontend[0xcbd30e] /usr/bin/swift-frontend[0xcbf594] /usr/bin/swift-frontend[0xcbb842] /usr/bin/swift-frontend[0xcc20d1] /usr/bin/swift-frontend[0xd71452] /usr/bin/swift-frontend[0xcc62b1] /usr/bin/swift-frontend[0xcc3234] /usr/bin/swift-fronte

@swift-5.6.3

class EventLoopFuture<T> { func get() async throws -> T { fatalError() } } protocol Database { func transaction<T>(_ closure: @escaping (Database) -> EventLoopFuture<T>) -> EventLoopFuture<T> } extension Database { func transaction<T>(_ closure: @Sendable @escaping (Database) async throws -> T) async throws -> T { try await self.transaction { db -> EventLoopFuture<T> in fatalError() }.get() } }

(edited)

Iceman

@swift-5.6.3

class EventLoopFuture<T> { func get() async throws -> T { fatalError() } } protocol Database { func transaction<T>(_ closure: @escaping (Database) -> EventLoopFuture<T>) -> EventLoopFuture<T> } extension Database { func transaction<T>(_ closure: @Sendable @escaping (Database) async throws -> T) async throws -> T { try await self.transaction { db -> EventLoopFuture<T> in fatalError() }.get() } }

(edited)

no output (edited)

@swift-5.6.3

class EventLoopFuture<T> { func get() async throws -> T { fatalError() } } struct Database { func transaction<T>(_ closure: @escaping (Database) -> EventLoopFuture<T>) -> EventLoopFuture<T> { closure(self) } } extension Database { func transaction<T>(_ closure: @Sendable @escaping (Database) async throws -> T) async throws -> T { try await self.transaction { db -> EventLoopFuture<T> in fatalError() }.get() } }

(edited)

Iceman

@swift-5.6.3

class EventLoopFuture<T> { func get() async throws -> T { fatalError() } } struct Database { func transaction<T>(_ closure: @escaping (Database) -> EventLoopFuture<T>) -> EventLoopFuture<T> { closure(self) } } extension Database { func transaction<T>(_ closure: @Sendable @escaping (Database) async throws -> T) async throws -> T { try await self.transaction { db -> EventLoopFuture<T> in fatalError() }.get() } }

(edited)

exit status: 1 with stderr:

<stdin>:12:19: error: ambiguous use of 'transaction' try await self.transaction { db -> EventLoopFuture<T> in ^ <stdin>:5:10: note: found this candidate func transaction<T>(_ closure: @escaping (Database) -> EventLoopFuture<T>) -> EventLoopFuture<T> { ^ <stdin>:11:10: note: found this candidate func transaction<T>(_ closure: @Sendable @escaping (Database) async throws -> T) async throws -> T { ^

(edited)

@swift-main

protocol P<A> { associatedtype A } protocol Q {} struct S<A>: P {} struct K: Q {} func makePair() -> <T0: Q, T1: Q> (S<T0>, S<T1>) { (S<K>(), S<K>()) } func usePair<T: Q>(_ pair: (S<T>, S<T>)) {} func main() { let pair = makePair() usePair(pair) }

omochimetaru

@swift-main

protocol P<A> { associatedtype A } protocol Q {} struct S<A>: P {} struct K: Q {} func makePair() -> <T0: Q, T1: Q> (S<T0>, S<T1>) { (S<K>(), S<K>()) } func usePair<T: Q>(_ pair: (S<T>, S<T>)) {} func main() { let pair = makePair() usePair(pair) }

exit status: 1 with stderr:

<stdin>:1:11: error: protocols do not allow generic parameters; use associated types instead protocol P<A> { ^ <stdin>:9:20: error: expected type for function result func makePair() -> <T0: Q, T1: Q> (S<T0>, S<T1>) { ^ <stdin>:9:19: error: consecutive statements on a line must be separated by ';' func makePair() -> <T0: Q, T1: Q> (S<T0>, S<T1>) { ^ ; <stdin>:9:23: error: consecutive statements on a line must be separated by ';' func makePair() -> <T0: Q, T1: Q> (S<T0>, S<T1>) { ^ ; <stdin>:9:23: error: expected expression func makePair() -> <T0: Q, T1: Q> (S<T0>, S<T1>) { ^ <stdin>:9:50: error: top-level statement cannot begin with a closure expression func makePair() -> <T0: Q, T1: Q> (S<T0>, S<T1>) { ^ <stdin>:9:6: error: expected '{' in body of function declaration func makePair() -> <T0: Q, T1: Q> (S<T0>, S<T1>) { ^ <stdin>:9:20: error: '<' is not a prefix unary operator func makePair() -> <T0: Q, T1: Q> (S<T0>, S<T1>) { ^ <stdin>:9:21: error: cannot find 'T0' in scope func makePair() -> <T0: Q, T1: Q> (S<T0>, S<T1>) { ^~ <stdin>:9:50: error: closure expression is unused func makePair() -> <T0: Q, T1: Q> (S<T0>, S<T1>) { ^ <stdin>:9:50: note: did you mean to use a 'do' statement? func makePair() -> <T0: Q, T1: Q> (S<T0>, S<T1>) { ^ do <stdin>:16:9: warning: constant 'pair' inferred to have type '()', which may be unexpected let pair = makePair() ^ <stdin>:16:9: note: add an explicit type annotation to silence this warning let pair = makePair() ^ : () <stdin>:17:5: error: generic parameter 'T' could not be inferred usePair(pa

@swift-main -Xfrontend -enable-experimental-named-opaque-types

protocol P<A> { associatedtype A } protocol Q {} struct S<A>: P {} struct K: Q {} func makePair() -> <T0: Q, T1: Q> (S<T0>, S<T1>) { (S<K>(), S<K>()) } func usePair<T: Q>(_ pair: (S<T>, S<T>)) {} func main() { let pair = makePair() usePair(pair) }

omochimetaru

@swift-main -Xfrontend -enable-experimental-named-opaque-types

protocol P<A> { associatedtype A } protocol Q {} struct S<A>: P {} struct K: Q {} func makePair() -> <T0: Q, T1: Q> (S<T0>, S<T1>) { (S<K>(), S<K>()) } func usePair<T: Q>(_ pair: (S<T>, S<T>)) {} func main() { let pair = makePair() usePair(pair) }

exit status: 134 with stderr:

<stdin>:1:11: error: protocols do not allow generic parameters; use associated types instead protocol P<A> { ^ swift-frontend: /home/build-user/swift/lib/Sema/CSSimplify.cpp:3221: ConstraintSystem::TypeMatchResult swift::constraints::ConstraintSystem::matchDeepEqualityTypes(swift::Type, swift::Type, swift::constraints::ConstraintLocatorBuilder): Assertion `opaque1->getCanonicalInterfaceType(arch1->getInterfaceType())->isEqual( opaque2->getCanonicalInterfaceType(arch2->getInterfaceType()))' failed. Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -new-driver-path /usr/bin/swift-driver -enable-experimental-named-opaque-types -empty-abi-descriptor -resource-dir /usr/lib/swift -module-name main 1. Swift version 5.7-dev (LLVM aac709978dda363, Swift 8c308d0ff137dde) 2. Compiling with the current language version 3. While evaluating request TypeCheckSourceFileRequest(source_file "<stdin>") 4. While evaluating request TypeCheckFunctionBodyRequest(main.(file).main()@<stdin>:15:6) 5. While type-checking statement at [<stdin>:15:13 - line:18:1] RangeText="{ let pair = makePair() usePair(pair) " 6. While type-checking expression at [<stdin>:17:5 - line:17:17] RangeText="usePair(pair" Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it): /usr/bin/swift-frontend[0x62f7253] /usr/bin/swift-frontend[0x62f4dfe] /usr/bin/swift-frontend[0x62f75e6] /lib/x86_64-linux-gnu/libpthread.so.0(+0x12980)[0x7f70ed252980] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0xc7)[0x7f70eb4c5e87] /lib/x86_64-linux-gnu/libc.so.6(abort+0x141)[0x7f70eb4c77f1] /lib/x86_64-linux-gnu/libc.so.6(+0x303fa)[0x7f70eb4b73fa] /lib/x86_64-linux-gnu/libc.so.6(+0x30472)[0x7f70eb4b7472] /usr/bin/swift-frontend[0x13579fe] /usr/bin/swift-frontend[0x137e7d5] /usr/bin/swift-frontend[0x1363e37] /usr/bin/swift-frontend[0x1351451] /usr/bin

@swift-main -Xfrontend -enable-experimental-named-opaque-types -Xfrontend -enable-parameterized-existential-types

protocol P<A> { associatedtype A } protocol Q {} struct S<A>: P {} struct K: Q {} func makePair() -> <T0: Q, T1: Q> (S<T0>, S<T1>) { (S<K>(), S<K>()) } func usePair<T: Q>(_ pair: (S<T>, S<T>)) {} func main() { let pair = makePair() usePair(pair) }

omochimetaru

@swift-main -Xfrontend -enable-experimental-named-opaque-types -Xfrontend -enable-parameterized-existential-types

protocol P<A> { associatedtype A } protocol Q {} struct S<A>: P {} struct K: Q {} func makePair() -> <T0: Q, T1: Q> (S<T0>, S<T1>) { (S<K>(), S<K>()) } func usePair<T: Q>(_ pair: (S<T>, S<T>)) {} func main() { let pair = makePair() usePair(pair) }

exit status: 1 with stderr:<unknown>:0: error: unknown argument: '-enable-parameterized-existential-types'

@swift-main -Xfrontend -enable-experimental-named-opaque-types -Xfrontend -enable-parameterized-protocol-types

protocol P<A> { associatedtype A } protocol Q {} struct S<A>: P {} struct K: Q {} func makePair() -> <T0: Q, T1: Q> (S<T0>, S<T1>) { (S<K>(), S<K>()) } func usePair<T: Q>(_ pair: (S<T>, S<T>)) {} func main() { let pair = makePair() usePair(pair) }

omochimetaru

@swift-main -Xfrontend -enable-experimental-named-opaque-types -Xfrontend -enable-parameterized-protocol-types

protocol P<A> { associatedtype A } protocol Q {} struct S<A>: P {} struct K: Q {} func makePair() -> <T0: Q, T1: Q> (S<T0>, S<T1>) { (S<K>(), S<K>()) } func usePair<T: Q>(_ pair: (S<T>, S<T>)) {} func main() { let pair = makePair() usePair(pair) }

exit status: 134 with stderr:

swift-frontend: /home/build-user/swift/lib/Sema/CSSimplify.cpp:3221: ConstraintSystem::TypeMatchResult swift::constraints::ConstraintSystem::matchDeepEqualityTypes(swift::Type, swift::Type, swift::constraints::ConstraintLocatorBuilder): Assertion `opaque1->getCanonicalInterfaceType(arch1->getInterfaceType())->isEqual( opaque2->getCanonicalInterfaceType(arch2->getInterfaceType()))' failed. Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -new-driver-path /usr/bin/swift-driver -enable-experimental-named-opaque-types -enable-parameterized-protocol-types -empty-abi-descriptor -resource-dir /usr/lib/swift -module-name main 1. Swift version 5.7-dev (LLVM aac709978dda363, Swift 8c308d0ff137dde) 2. Compiling with the current language version 3. While evaluating request TypeCheckSourceFileRequest(source_file "<stdin>") 4. While evaluating request TypeCheckFunctionBodyRequest(main.(file).main()@<stdin>:15:6) 5. While type-checking statement at [<stdin>:15:13 - line:18:1] RangeText="{ let pair = makePair() usePair(pair) " 6. While type-checking expression at [<stdin>:17:5 - line:17:17] RangeText="usePair(pair" Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it): /usr/bin/swift-frontend[0x62f7253] /usr/bin/swift-frontend[0x62f4dfe] /usr/bin/swift-frontend[0x62f75e6] /lib/x86_64-linux-gnu/libpthread.so.0(+0x12980)[0x7fdc4ba8b980] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0xc7)[0x7fdc49cfee87] /lib/x86_64-linux-gnu/libc.so.6(abort+0x141)[0x7fdc49d007f1] /lib/x86_64-linux-gnu/libc.so.6(+0x303fa)[0x7fdc49cf03fa] /lib/x86_64-linux-gnu/libc.so.6(+0x30472)[0x7fdc49cf0472] /usr/bin/swift-frontend[0x13579fe] /usr/bin/swift-frontend[0x137e7d5] /usr/bin/swift-frontend[0x1363e37] /usr/bin/swift-frontend[0x1351451] /usr/bin/swift-frontend[0x1357c11] /usr/bin/swift-frontend[0x13573c8] /usr/bin/swift-fronten

@swift-main -Xfrontend -enable-experimental-named-opaque-types -Xfrontend -enable-parameterized-protocol-types

public protocol P<A> { associatedtype A } struct S1<A>: P {} struct S2<A>: P {} public func makeP() -> <T: P, U: P where T.A == U.A> (T, U) { return (S1<Int>(), S2<Int>()) } public func useSame<T>(_ a: T, _ b: T) {} func main() { let pair = makeP() useSame(type(of: pair.0).A.self, type(of: pair.1).A.self) }

omochimetaru

@swift-main -Xfrontend -enable-experimental-named-opaque-types -Xfrontend -enable-parameterized-protocol-types

public protocol P<A> { associatedtype A } struct S1<A>: P {} struct S2<A>: P {} public func makeP() -> <T: P, U: P where T.A == U.A> (T, U) { return (S1<Int>(), S2<Int>()) } public func useSame<T>(_ a: T, _ b: T) {} func main() { let pair = makeP() useSame(type(of: pair.0).A.self, type(of: pair.1).A.self) }

no output

@swift-main -Xfrontend -enable-experimental-named-opaque-types -Xfrontend -enable-parameterized-protocol-types

public protocol P<A> { associatedtype A } struct S1<A>: P {} struct S2<A>: P {} public func makeP() -> <T: P, U: P> (T, U) { return (S1<Int>(), S2<Int>()) } public func useSame<T>(_ a: T, _ b: T) {} func main() { let pair = makeP() useSame(type(of: pair.0).A.self, type(of: pair.1).A.self) }

omochimetaru

@swift-main -Xfrontend -enable-experimental-named-opaque-types -Xfrontend -enable-parameterized-protocol-types

public protocol P<A> { associatedtype A } struct S1<A>: P {} struct S2<A>: P {} public func makeP() -> <T: P, U: P> (T, U) { return (S1<Int>(), S2<Int>()) } public func useSame<T>(_ a: T, _ b: T) {} func main() { let pair = makeP() useSame(type(of: pair.0).A.self, type(of: pair.1).A.self) }

exit status: 134 with stderr:

swift-frontend: /home/build-user/swift/lib/Sema/CSSimplify.cpp:3221: ConstraintSystem::TypeMatchResult swift::constraints::ConstraintSystem::matchDeepEqualityTypes(swift::Type, swift::Type, swift::constraints::ConstraintLocatorBuilder): Assertion `opaque1->getCanonicalInterfaceType(arch1->getInterfaceType())->isEqual( opaque2->getCanonicalInterfaceType(arch2->getInterfaceType()))' failed. Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -new-driver-path /usr/bin/swift-driver -enable-experimental-named-opaque-types -enable-parameterized-protocol-types -empty-abi-descriptor -resource-dir /usr/lib/swift -module-name main 1. Swift version 5.7-dev (LLVM aac709978dda363, Swift 8c308d0ff137dde) 2. Compiling with the current language version 3. While evaluating request TypeCheckSourceFileRequest(source_file "<stdin>") 4. While evaluating request TypeCheckFunctionBodyRequest(main.(file).main()@<stdin>:14:6) 5. While type-checking statement at [<stdin>:14:13 - line:17:1] RangeText="{ let pair = makeP() useSame(type(of: pair.0).A.self, type(of: pair.1).A.self) " 6. While type-checking expression at [<stdin>:16:5 - line:16:61] RangeText="useSame(type(of: pair.0).A.self, type(of: pair.1).A.self" Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it): /usr/bin/swift-frontend[0x62f7253] /usr/bin/swift-frontend[0x62f4dfe] /usr/bin/swift-frontend[0x62f75e6] /lib/x86_64-linux-gnu/libpthread.so.0(+0x12980)[0x7f3c6f6d7980] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0xc7)[0x7f3c6d94ae87] /lib/x86_64-linux-gnu/libc.so.6(abort+0x141)[0x7f3c6d94c7f1] /lib/x86_64-linux-gnu/libc.so.6(+0x303fa)[0x7f3c6d93c3fa] /lib/x86_64-linux-gnu/libc.so.6(+0x30472)[0x7f3c6d93c472] /usr/bin/swift-frontend[0x13579fe] /usr/bin/swift-frontend[0x137e7d5] /usr/bin/swift-frontend[0x1363e37] /usr/bin/swift-frontend[0x1351451] /usr/bi

@swift-main -version

norio_nomura

@swift-main -version

Swift version 5.8-dev (LLVM 2974a4eff23971f, Swift 0bf6fc311e973a8) Target: x86_64-unknown-linux-gnu

@swift-5.6.3 -version

norio_nomura

@swift-5.6.3 -version

Swift version 5.6.1 (swift-5.6.1-RELEASE) Target: x86_64-unknown-linux-gnu

nightly-5.7-*はまだ無いのか https://hub.docker.com/r/swiftlang/swift/tags?page=1&name=5.7

なさそうっすね。5.8って出てたから見逃したかと思った。

とうことで、Heroku復活してた事に気づいたからnightlyと5.6のボットを更新したけど、5.7はおあずけです。 (edited)

swift-nightlyではなくswift-mainとボットに名乗らせた方が分かりやすいかな？ (edited)

見てきたら公式サイトの表記は trunk development (main) なんですね

nightlyはビルドされる周期を表すだけなので、出自がmainブランチであることを示した方が良いかなと。

あ、nightlyって毎晩って意味だったのか。

2:31 PM

用語として無意識に使ってました。

ということで、swift-nightlyからswift-mainへ変えてみました。

1

@swift-main protocol P<A> { associatedtype A } struct S<A>: P {} func f<T>() -> any P<T> { S() }

omochimetaru

@swift-main protocol P<A> { associatedtype A } struct S<A>: P {} func f<T>() -> any P<T> { S() }

no output

@swift-main

protocol P { func foo() -> Int } struct S: P { func foo() -> Int { 42 } } func useP(_ p: some P) { print(p.foo()) } let p: any P = S() useP(p)

(edited)

koher

@swift-main

protocol P { func foo() -> Int } struct S: P { func foo() -> Int { 42 } } func useP(_ p: some P) { print(p.foo()) } let p: any P = S() useP(p)

(edited)

42 (edited)

@swift-main

protocol P { func foo() -> Int } struct S: P { func foo() -> Int { 42 } } func useP<T: P>(_ p: T) -> T { p } let p: any P = S() let q: any P = useP(p) print(q.foo())

(edited)

koher

@swift-main

protocol P { func foo() -> Int } struct S: P { func foo() -> Int { 42 } } func useP<T: P>(_ p: T) -> T { p } let p: any P = S() let q: any P = useP(p) print(q.foo())

(edited)

42 (edited)

@swift-main

protocol P { func foo() -> Int } struct S: P { func foo() -> Int { 42 } } func useP<T: P>(_ p: T) -> T? { p } let p: any P = S() let q: (any P)? = useP(p) print(q?.foo() as Any)

(edited)

koher

@swift-main

protocol P { func foo() -> Int } struct S: P { func foo() -> Int { 42 } } func useP<T: P>(_ p: T) -> T? { p } let p: any P = S() let q: (any P)? = useP(p) print(q?.foo() as Any)

(edited)

Optional(42) (edited)

@swift-main

protocol P { func foo() -> Int } struct S: P { func foo() -> Int { 42 } } func useP<T: P>(_ p: T) -> (T, T) { (p, p) } let p: any P = S() let q = useP(p) print(type(of: q)) print(q)

koher

@swift-main

protocol P { func foo() -> Int } struct S: P { func foo() -> Int { 42 } } func useP<T: P>(_ p: T) -> (T, T) { (p, p) } let p: any P = S() let q = useP(p) print(type(of: q)) print(q)

(P, P) (main.S(), main.S())

@swift-main

protocol View { } struct FooView: View { } struct BarView: View { } struct TupleView<T>: View { let content: T init(_ content: T) { self.content = content } } func buildBlock<C0, C1>(_ c0: C0, _ c1: C1) -> TupleView<(C0, C1)> where C0 : View, C1 : View { TupleView((c0, c1)) } let view0 = FooView() let view1 = BarView() print(buildBlock(view0, view1))

(edited)

koher

@swift-main

protocol View { } struct FooView: View { } struct BarView: View { } struct TupleView<T>: View { let content: T init(_ content: T) { self.content = content } } func buildBlock<C0, C1>(_ c0: C0, _ c1: C1) -> TupleView<(C0, C1)> where C0 : View, C1 : View { TupleView((c0, c1)) } let view0 = FooView() let view1 = BarView() print(buildBlock(view0, view1))

(edited)

TupleView<(FooView, BarView)>(content: (main.FooView(), main.BarView())) (edited)

@swift-main

protocol View { } struct FooView: View { } struct BarView: View { } struct TupleView<T>: View { let content: T init(_ content: T) { self.content = content } } func buildBlock<C0, C1>(_ c0: C0, _ c1: C1) -> TupleView<(C0, C1)> where C0 : View, C1 : View { TupleView((c0, c1)) } let view0: any View = FooView() let view1: any View = BarView() print(buildBlock(view0, view1))

koher

@swift-main

protocol View { } struct FooView: View { } struct BarView: View { } struct TupleView<T>: View { let content: T init(_ content: T) { self.content = content } } func buildBlock<C0, C1>(_ c0: C0, _ c1: C1) -> TupleView<(C0, C1)> where C0 : View, C1 : View { TupleView((c0, c1)) } let view0: any View = FooView() let view1: any View = BarView() print(buildBlock(view0, view1))

exit status: 1 with stderr:

<stdin>:23:7: error: type 'any View' cannot conform to 'View' print(buildBlock(view0, view1)) ^ <stdin>:23:7: note: only concrete types such as structs, enums and classes can conform to protocols print(buildBlock(view0, view1)) ^ <stdin>:17:6: note: required by global function 'buildBlock' where 'C0' = 'any View' func buildBlock<C0, C1>(_ c0: C0, _ c1: C1) -> TupleView<(C0, C1)> where C0 : View, C1 : View { ^ <stdin>:23:7: error: type 'any View' cannot conform to 'View' print(buildBlock(view0, view1)) ^ <stdin>:23:7: note: only concrete types such as structs, enums and classes can conform to protocols print(buildBlock(view0, view1)) ^ <stdin>:17:6: note: required by global function 'buildBlock' where 'C1' = 'any View' func buildBlock<C0, C1>(_ c0: C0, _ c1: C1) -> TupleView<(C0, C1)> where C0 : View, C1 : View { ^

@swift-main

protocol View { } struct FooView: View { } struct BarView: View { } func buildBlock<C0, C1>(_ c0: C0, _ c1: C1) where C0 : View, C1 : View { } let view0: any View = FooView() let view1: any View = BarView() buildBlock(view0, view1)

koher

@swift-main

protocol View { } struct FooView: View { } struct BarView: View { } func buildBlock<C0, C1>(_ c0: C0, _ c1: C1) where C0 : View, C1 : View { } let view0: any View = FooView() let view1: any View = BarView() buildBlock(view0, view1)

no output

@swift-main

protocol View { } struct FooView: View { } struct BarView: View { } struct TupleView<T>: View { let content: T init(_ content: T) { self.content = content } } func buildBlock<C0>(_ c0: C0) -> TupleView<(C0)> where C0 : View { TupleView(c0) } let view0: any View = FooView() print(buildBlock(view0))

koher

@swift-main

protocol View { } struct FooView: View { } struct BarView: View { } struct TupleView<T>: View { let content: T init(_ content: T) { self.content = content } } func buildBlock<C0>(_ c0: C0) -> TupleView<(C0)> where C0 : View { TupleView(c0) } let view0: any View = FooView() print(buildBlock(view0))

exit status: 1 with stderr:

<stdin>:22:7: error: type 'any View' cannot conform to 'View' print(buildBlock(view0)) ^ <stdin>:22:7: note: only concrete types such as structs, enums and classes can conform to protocols print(buildBlock(view0)) ^ <stdin>:17:6: note: required by global function 'buildBlock' where 'C0' = 'any View' func buildBlock<C0>(_ c0: C0) -> TupleView<(C0)> where C0 : View { ^

@swift-5.6.3 @differentiable func f(_ x: Float) -> Float { x * x } let dfdx = derivative(of: f) print(dfdx(3))

omochimetaru

@swift-5.6.3 @differentiable func f(_ x: Float) -> Float { x * x } let dfdx = derivative(of: f) print(dfdx(3))

exit status: 1 with stderr:

<stdin>:1:16: warning: '@differentiable' has been renamed to '@differentiable(reverse)' and will be removed in the next release @differentiable ^ (reverse) <stdin>:1:2: error: @differentiable attribute used without importing module '_Differentiation' @differentiable ~^~~~~~~~~~~~~~ <stdin>:5:12: error: cannot find 'derivative' in scope let dfdx = derivative(of: f) ^~~~~~~~~~

@swift-5.6.3

import _Differentiation @differentiable(reverse) func f(_ x: Float) -> Float { x * x } let dfdx = derivative(of: f) print(dfdx(3))

omochimetaru

@swift-5.6.3

import _Differentiation @differentiable(reverse) func f(_ x: Float) -> Float { x * x } let dfdx = derivative(of: f) print(dfdx(3))

exit status: 132 with stderr:

_Differentiation/DifferentiationUtilities.swift:40: Fatal error: JVP does not exist. Use '-Xfrontend -enable-experimental-forward-mode-differentiation' to enable differential-first differentiation APIs. Current stack trace: 0 libswiftCore.so 0x00007f6de6bc2920 _swift_stdlib_reportFatalErrorInFile + 112 1 libswiftCore.so 0x00007f6de68baa6c <unavailable> + 1419884 2 libswiftCore.so 0x00007f6de68ba893 <unavailable> + 1419411 3 libswiftCore.so 0x00007f6de68b93a0 _assertionFailure(_:_:file:line:flags:) + 411 4 libswift_Differentiation.so 0x00007f6de2df9ec4 <unavailable> + 163524 7 libswift_Differentiation.so 0x00007f6de2df82a0 valueWithDifferential<A, B>(at:of:) + 106 8 libswift_Differentiation.so 0x00007f6de2df8720 differential<A, B>(at:of:) + 93 9 libswift_Differentiation.so 0x00007f6de2df8a90 derivative<A, B>(at:of:) + 89 10 libswift_Differentiation.so 0x00007f6de2df96b8 <unavailable> + 161464 13 swift-frontend 0x00000000005ccbea <unavailable> + 1887210 14 swift-frontend 0x00000000004d3954 <unavailable> + 866644 15 swift-frontend 0x00000000004993b9 <unavailable> + 627641 16 swift-frontend 0x000000000049893d <unavailable> + 624957 17 swift-frontend 0x000000000048d508 <unavailable> + 578824 18 swift-frontend 0x00000000004463af <unavailable> + 287663 19 libc.so.6 0x00007f6de51fbba0 __libc_start_main + 231 20 swift-frontend 0x0000000000445dda <unavailable> + 286170 Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -new-driver-path /usr/bin/swift-driver -resource-dir /usr/lib/swift -module-name main 1. Swift version 5.6.1 (swift-5.6.1-RELEASE) 2. Compiling with the current

@swift-5.6.3 -Xfrontend -enable-experimental-forward-mode-differentiation

import _Differentiation @differentiable(reverse) func f(_ x: Float) -> Float { x * x } let dfdx = derivative(of: f) print(dfdx(3))

omochimetaru

@swift-5.6.3 -Xfrontend -enable-experimental-forward-mode-differentiation

import _Differentiation @differentiable(reverse) func f(_ x: Float) -> Float { x * x } let dfdx = derivative(of: f) print(dfdx(3))

6.0

@swift-5.6.3 -Xfrontend -enable-experimental-forward-mode-differentiation

import _Differentiation @differentiable(_forward) func f(_ x: Float) -> Float { x * x } let dfdx = derivative(of: f) print(dfdx(3))

omochimetaru

@swift-5.6.3 -Xfrontend -enable-experimental-forward-mode-differentiation

import _Differentiation @differentiable(_forward) func f(_ x: Float) -> Float { x * x } let dfdx = derivative(of: f) print(dfdx(3))

exit status: 1 with stderr:

<stdin>:3:17: error: unsupported differentiability kind '_forward'; only 'reverse' is supported @differentiable(_forward) ^~~~~~~~ reverse

swift-5.7-DEVELOPMENT-SNAPSHOT-*を使った公式Dockerイメージが提供されないので、公式Dokcerイメージに依存しない形で作りました。 @swift-5.7.3 -version (edited)

norio_nomura

swift-5.7-DEVELOPMENT-SNAPSHOT-*を使った公式Dockerイメージが提供されないので、公式Dokcerイメージに依存しない形で作りました。 @swift-5.7.3 -version (edited)

Swift version 5.7-dev (LLVM 9fde71b269b42b8, Swift ddc46e1f5bd885d) Target: x86_64-unknown-linux-gnu

swift42ボットのHerokuインスタンスを流用したので、最後のswift4.xボットが居なくなりました。

@swift-5.6.3

import Foundation @MainActor func run(action: @escaping @Sendable () -> Void) async { print("1") print(Thread.isMainThread) action() } Task { await run { print("action") print(Thread.isMainThread) } print("2") print(Thread.isMainThread) } RunLoop.main.run(until: Date().addingTimeInterval(0.3))

(edited)

shiz

@swift-5.6.3

import Foundation @MainActor func run(action: @escaping @Sendable () -> Void) async { print("1") print(Thread.isMainThread) action() } Task { await run { print("action") print(Thread.isMainThread) } print("2") print(Thread.isMainThread) } RunLoop.main.run(until: Date().addingTimeInterval(0.3))

(edited)

1 true action true 2 true (edited)

@swift-5.7.3

import Foundation @MainActor func run(action: @escaping @Sendable () -> Void) async { print("1") print(Thread.isMainThread) action() } Task { await run { print("action") print(Thread.isMainThread) } print("2") print(Thread.isMainThread) } RunLoop.main.run(until: Date().addingTimeInterval(0.3))

shiz

@swift-5.7.3

import Foundation @MainActor func run(action: @escaping @Sendable () -> Void) async { print("1") print(Thread.isMainThread) action() } Task { await run { print("action") print(Thread.isMainThread) } print("2") print(Thread.isMainThread) } RunLoop.main.run(until: Date().addingTimeInterval(0.3))

1 true action true 2 false

おお〜変わってる

SE-0338ですねー https://github.com/apple/swift-evolution/blob/main/proposals/0338-clarify-execution-non-actor-async.md (edited)

8:57 AM

@swift-5.7.3

import Foundation @MainActor func run(action: @escaping @Sendable () -> Void) async { print("1") print(Thread.isMainThread) action() } Task { @MainActor in // 追加 await run { print("action") print(Thread.isMainThread) } print("2") print(Thread.isMainThread) } RunLoop.main.run(until: Date().addingTimeInterval(0.3))

shiz

@swift-5.7.3

import Foundation @MainActor func run(action: @escaping @Sendable () -> Void) async { print("1") print(Thread.isMainThread) action() } Task { @MainActor in // 追加 await run { print("action") print(Thread.isMainThread) } print("2") print(Thread.isMainThread) } RunLoop.main.run(until: Date().addingTimeInterval(0.3))

1 true action true 2 true

Actor引き継ぎがよくわかんないやつ、0338で整理されてたのか

9:05 AM

Proposed solution async functions that are not actor-isolated should formally run on a generic executor associated with no actor. Such functions will formally switch executors exactly like an actor-isolated function would: on any entry to the function, including calls, returns from calls, and resumption from suspension, they will switch to a generic, non-actor executor. If they were previously running on some actor's executor, that executor will become free to execute other tasks.

9:06 AM

not actor isolated なら、generic executor になる、別のactorに行って返ってくる時にもgeneric executorに戻る

9:06 AM

わかりやすい

9:07 AM

これまでは、non actor isolatedの場合は実行元のactorを引き継いでいたという事っぽいな

>これまでは、non actor isolatedの場合は実行元のactorを引き継いでいたという事っぽいなはい、それがissueになってました

そのせいで、実行するExecutor(をもつActor)がどれになるかが、静的なようにも動的なようにも見えてよくわからなかったんですよね。

1

9:13 AM

As a result of this change, the formal executor of an async function is always known statically: actor-isolated async functions always formally run on the actor's executor non-actor-isolated async functions never formally run on any actor's executor

9:13 AM

常に静的に決まるようになった、よかった

これはありがたい

ですね(ただ、Swift5.6 で実はこの挙動に依存していて、5.7にしたら壊れた、ということがないかがちょっと心配ですw)

それはありそう。

11:04 AM

もともと5.6の挙動は「特に拘束されない」という意味のつもりだったんだろうなあ

1

@swift-5.7.3

import Foundation protocol P: Sendable { func f() } final class C: P { @MainActor func f() { print(Thread.isMainThread) } } let c = C() let p: P = C() Task { print(Thread.isMainThread) await c.f() p.f() } RunLoop.main.run(until: Date().addingTimeInterval(0.3))

(edited)

Iceman

@swift-5.7.3

import Foundation protocol P: Sendable { func f() } final class C: P { @MainActor func f() { print(Thread.isMainThread) } } let c = C() let p: P = C() Task { print(Thread.isMainThread) await c.f() p.f() } RunLoop.main.run(until: Date().addingTimeInterval(0.3))

(edited)

false true false (edited)

@swift-5.7.3

struct Foo {} protocol Bar { associatedtype Foos: Sequence where Foos.Element == Foo var foos: Foos { get } } struct Baz: Bar { var foos: [Foo] { [Foo()] } } let bar: any Bar = Baz() var iterator = (bar.foos as any Sequence).makeIterator() as any IteratorProtocol while let foo = iterator.next() { print(foo) }

(edited)

koher

@swift-5.7.3

struct Foo {} protocol Bar { associatedtype Foos: Sequence where Foos.Element == Foo var foos: Foos { get } } struct Baz: Bar { var foos: [Foo] { [Foo()] } } let bar: any Bar = Baz() var iterator = (bar.foos as any Sequence).makeIterator() as any IteratorProtocol while let foo = iterator.next() { print(foo) }

(edited)

Foo() (edited)

@swift-5.7.3

struct Foo {} protocol Bar { associatedtype Foos: Sequence where Foos.Element == Foo var foos: Foos { get } } struct Baz: Bar { var foos: [Foo] { [Foo()] } } let bar: any Bar = Baz() for foo in bar.foos as any Sequence { print(foo) }

koher

@swift-5.7.3

struct Foo {} protocol Bar { associatedtype Foos: Sequence where Foos.Element == Foo var foos: Foos { get } } struct Baz: Bar { var foos: [Foo] { [Foo()] } } let bar: any Bar = Baz() for foo in bar.foos as any Sequence { print(foo) }

Foo()

Swift 5.7のDockerイメージ公開されましたね。

8:47 AM

WWDC終わるまで待ってたんでしょうね。

ふむ。snapshotsのdockerイメージは元の*.tar.gzやDockerfileに変化がなくても更新されてしまう様なので、無駄なボットの更新を避けるためDockerイメージへ依存しない今の仕組みのままでいきます。 (edited)

@swift-5.6.3 @swift-5.7.3

extension Substring { /// Converts all `\"` to `"`. func unescapingDoubleQuotes() -> Substring { self.lazy.split(separator: "\\").reduce(into: "") { (result, part) in if result.isEmpty || part.first == "\"" { result += part } else { result += "\\" + part } } } }

Iceman

@swift-5.6.3 @swift-5.7.3

extension Substring { /// Converts all `\"` to `"`. func unescapingDoubleQuotes() -> Substring { self.lazy.split(separator: "\\").reduce(into: "") { (result, part) in if result.isEmpty || part.first == "\"" { result += part } else { result += "\\" + part } } } }

exit status: 1 with stderr:

<stdin>:4:14: error: ambiguous use of 'split(separator:maxSplits:omittingEmptySubsequences:)' self.lazy.split(separator: "\\").reduce(into: "") { (result, part) in ^ Swift.Sequence:2:40: note: found this candidate @inlinable public __consuming func split(separator: Self.Element, maxSplits: Int = Int.max, omittingEmptySubsequences: Bool = true) -> [ArraySlice<Self.Element>] ^ Swift.Collection:2:40: note: found this candidate @inlinable public __consuming func split(separator: Self.Element, maxSplits: Int = Int.max, omittingEmptySubsequences: Bool = true) -> [Self.SubSequence] ^

Iceman

@swift-5.6.3 @swift-5.7.3

extension Substring { /// Converts all `\"` to `"`. func unescapingDoubleQuotes() -> Substring { self.lazy.split(separator: "\\").reduce(into: "") { (result, part) in if result.isEmpty || part.first == "\"" { result += part } else { result += "\\" + part } } } }

no output

@swift-5.7.3 @swift-5.6.3 @swift-5.3.3

public protocol DependencyKey { associatedtype Value } public struct GenericDependencyKey<T>: DependencyKey { public typealias Value = T public init() {} } extension DependencyKey where Self == GenericDependencyKey<Value> { static var `default`: Self { GenericDependencyKey<Value>() } }

Iceman

@swift-5.7.3 @swift-5.6.3 @swift-5.3.3

public protocol DependencyKey { associatedtype Value } public struct GenericDependencyKey<T>: DependencyKey { public typealias Value = T public init() {} } extension DependencyKey where Self == GenericDependencyKey<Value> { static var `default`: Self { GenericDependencyKey<Value>() } }

exit status: 1 with stderr:

<stdin>:12:34: error: failed to produce diagnostic for expression; please submit a bug report (https://swift.org/contributing/#reporting-bugs) and include the project static var `default`: Self { GenericDependencyKey<Value>() } ^

Iceman

@swift-5.7.3 @swift-5.6.3 @swift-5.3.3

public protocol DependencyKey { associatedtype Value } public struct GenericDependencyKey<T>: DependencyKey { public typealias Value = T public init() {} } extension DependencyKey where Self == GenericDependencyKey<Value> { static var `default`: Self { GenericDependencyKey<Value>() } }

exit status: 1 with stderr:

<stdin>:11:36: error: same-type constraint 'Self' == 'GenericDependencyKey<Self.Value>' is recursive extension DependencyKey where Self == GenericDependencyKey<Value> { ^

Iceman

@swift-5.7.3 @swift-5.6.3 @swift-5.3.3

public protocol DependencyKey { associatedtype Value } public struct GenericDependencyKey<T>: DependencyKey { public typealias Value = T public init() {} } extension DependencyKey where Self == GenericDependencyKey<Value> { static var `default`: Self { GenericDependencyKey<Value>() } }

exit status: 1 with stderr:

<stdin>:12:34: error: failed to produce diagnostic for expression; please submit a bug report (https://swift.org/contributing/#reporting-bugs) and include the project static var `default`: Self { GenericDependencyKey<Value>() } ^

@swift-5.7.3 @swift-5.3.3

public protocol DependencyKey { associatedtype Value } public struct GenericDependencyKey<T>: DependencyKey { public typealias Value = T public init() {} } extension DependencyKey where Self == GenericDependencyKey<Value> { public static var `default`: GenericDependencyKey<Value> { .init() } }

(edited)

Iceman

@swift-5.7.3 @swift-5.3.3

public protocol DependencyKey { associatedtype Value } public struct GenericDependencyKey<T>: DependencyKey { public typealias Value = T public init() {} } extension DependencyKey where Self == GenericDependencyKey<Value> { public static var `default`: GenericDependencyKey<Value> { .init() } }

(edited)

exit status: 134 with stderr:

swift-frontend: /home/build-user/swift/include/swift/AST/ExprNodes.def:103: virtual std::pair<bool, Expr *> (anonymous namespace)::Verifier::walkToExprPre(swift::Expr *): Assertion `(HadError || !M.is<SourceFile*>() || M.get<SourceFile*>()->ASTStage < SourceFile::TypeChecked) && "UnresolvedMember" "in wrong phase"' failed. Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -new-driver-path /usr/bin/swift-driver -empty-abi-descriptor -resource-dir /usr/lib/swift -module-name main 1. Swift version 5.7-dev (LLVM fc0ab39bda0c879, Swift c6bb52ea2e91c0e) 2. Compiling with the current language version 3. While walking into decl extension of DependencyKey (at <stdin>:11:1) 4. While walking into body of getter for default (at <stdin>:12:23) Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it): /usr/bin/swift-frontend[0x610e423] /usr/bin/swift-frontend[0x610c16e] /usr/bin/swift-frontend[0x610e7af] /lib/x86_64-linux-gnu/libpthread.so.0(+0x14420)[0x7f699e736420] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0xcb)[0x7f699db8200b] /lib/x86_64-linux-gnu/libc.so.6(abort+0x12b)[0x7f699db61859] /lib/x86_64-linux-gnu/libc.so.6(+0x22729)[0x7f699db61729] /lib/x86_64-linux-gnu/libc.so.6(+0x33fd6)[0x7f699db72fd6] /usr/bin/swift-frontend[0x1a752b8] /usr/bin/swift-frontend[0x1a87d40] /usr/bin/swift-frontend[0x1a8a23f] /usr/bin/swift-frontend[0x1a89cb0] /usr/bin/swift-frontend[0x1a8cb36] /usr/bin/swift-frontend[0x1a8768e] /usr/bin/swift-frontend[0x1a8ba2c] /usr/bin/swift-frontend[0x1a8768e] /usr/bin/swift-frontend[0x1a8adb1] /usr/bin/swift-frontend[0x1a8afe2] /usr/bin/swift-frontend[0x1a8c133] /usr/bin/swift-frontend[0x1a8768e] /usr/bin/swift-frontend[0x1a8be45] /usr/bin/swift-frontend[0x1a8768e] /usr/bin/swift-frontend[0x1a87623] /usr/bin/swift-frontend[0x1c6e6a9] /usr/bin/swift-frontend[0x1a74a5d] /usr/bin/swift-fronten

(edited)

Iceman

@swift-5.7.3 @swift-5.3.3

public protocol DependencyKey { associatedtype Value } public struct GenericDependencyKey<T>: DependencyKey { public typealias Value = T public init() {} } extension DependencyKey where Self == GenericDependencyKey<Value> { public static var `default`: GenericDependencyKey<Value> { .init() } }

(edited)

exit status: 1 with stderr:

<stdin>:11:36: error: same-type constraint 'Self' == 'GenericDependencyKey<Self.Value>' is recursive extension DependencyKey where Self == GenericDependencyKey<Value> { ^

@swift-5.7.3 -Xfrontend -enable-bare-slash-regex let regex = /-(.*?)\+/ print(type(of: regex)) (edited)

nanasi

@swift-5.7.3 -Xfrontend -enable-bare-slash-regex let regex = /-(.*?)\+/ print(type(of: regex)) (edited)

Regex<(Substring, Substring)> (edited)

@swift-5.7.3 @swift-5.6.3

import Foundation import CoreData @objc(Test) class Test: NSManagedObject { } extension Test { @NSManaged public var text: String } class Model: ObservableObject { @MainActor @Published var list: [Test] = [] init() { let container = NSPersistentContainer(name: "") NotificationCenter.default.addObserver( forName: NSManagedObjectContext.didChangeObjectsNotification, object: container.persistentStoreCoordinator, queue: nil ) { notification in if let updatedList = notification.userInfo?[NSUpdatedObjectsKey] as? Set<NSManagedObject> { for updated in updatedList { Task { if let i = await self.list.firstIndex(where: { $0.objectID == updated.objectID }) { await MainActor.run(body: { self.list[i].text = "Changed" }) } } } } } } }

fummicc1

@swift-5.7.3 @swift-5.6.3

import Foundation import CoreData @objc(Test) class Test: NSManagedObject { } extension Test { @NSManaged public var text: String } class Model: ObservableObject { @MainActor @Published var list: [Test] = [] init() { let container = NSPersistentContainer(name: "") NotificationCenter.default.addObserver( forName: NSManagedObjectContext.didChangeObjectsNotification, object: container.persistentStoreCoordinator, queue: nil ) { notification in if let updatedList = notification.userInfo?[NSUpdatedObjectsKey] as? Set<NSManagedObject> { for updated in updatedList { Task { if let i = await self.list.firstIndex(where: { $0.objectID == updated.objectID }) { await MainActor.run(body: { self.list[i].text = "Changed" }) } } } } } } }

exit status: 1 with stderr:<stdin>:2:8: error: no such module 'CoreData' import CoreData ^

fummicc1

@swift-5.7.3 @swift-5.6.3

import Foundation import CoreData @objc(Test) class Test: NSManagedObject { } extension Test { @NSManaged public var text: String } class Model: ObservableObject { @MainActor @Published var list: [Test] = [] init() { let container = NSPersistentContainer(name: "") NotificationCenter.default.addObserver( forName: NSManagedObjectContext.didChangeObjectsNotification, object: container.persistentStoreCoordinator, queue: nil ) { notification in if let updatedList = notification.userInfo?[NSUpdatedObjectsKey] as? Set<NSManagedObject> { for updated in updatedList { Task { if let i = await self.list.firstIndex(where: { $0.objectID == updated.objectID }) { await MainActor.run(body: { self.list[i].text = "Changed" }) } } } } } } }

exit status: 1 with stderr:<stdin>:2:8: error: no such module 'CoreData' import CoreData ^

@swift-5.6.3 @swift-5.7.3

import Foundation struct Test { var text: String } class Model: ObservableObject { @MainActor @Published var list: [Test] = [] init() { Task { let updatedList = [ Test(text: "Text1"), Test(text: "Text2") ] for updated in updatedList { if let i = await self.list.firstIndex(where: { $0.text == updated.text }) { await MainActor.run(body: { self.list[i].text = "Changed" }) } } } } }

fummicc1

@swift-5.6.3 @swift-5.7.3

import Foundation struct Test { var text: String } class Model: ObservableObject { @MainActor @Published var list: [Test] = [] init() { Task { let updatedList = [ Test(text: "Text1"), Test(text: "Text2") ] for updated in updatedList { if let i = await self.list.firstIndex(where: { $0.text == updated.text }) { await MainActor.run(body: { self.list[i].text = "Changed" }) } } } } }

exit status: 1 with stderr:

<stdin>:8:17: error: unknown attribute 'Published' @MainActor @Published var list: [Test] = [] ^ <stdin>:7:14: error: cannot find type 'ObservableObject' in scope class Model: ObservableObject { ^~~~~~~~~~~~~~~~ <stdin>:19:30: error: actor-isolated property 'list' cannot be passed 'inout' to 'async' function call self.list[i].text = "Changed" ^ <stdin>:8:31: note: property declared here @MainActor @Published var list: [Test] = [] ^

fummicc1

@swift-5.6.3 @swift-5.7.3

import Foundation struct Test { var text: String } class Model: ObservableObject { @MainActor @Published var list: [Test] = [] init() { Task { let updatedList = [ Test(text: "Text1"), Test(text: "Text2") ] for updated in updatedList { if let i = await self.list.firstIndex(where: { $0.text == updated.text }) { await MainActor.run(body: { self.list[i].text = "Changed" }) } } } } }

exit status: 1 with stderr:

<stdin>:8:17: error: unknown attribute 'Published' @MainActor @Published var list: [Test] = [] ^ <stdin>:7:14: error: cannot find type 'ObservableObject' in scope class Model: ObservableObject { ^~~~~~~~~~~~~~~~ <stdin>:19:30: error: actor-isolated property 'list' cannot be passed 'inout' to 'async' function call self.list[i].text = "Changed" ^ <stdin>:8:31: note: property declared here @MainActor @Published var list: [Test] = [] ^

@swift-5.6.3 @swift-5.7.3

import Foundation struct Test { var id: Int var text: String } class Model { @MainActor var list: [Test] = [ Test(id: 1, text: ""), Test(id: 2, text: "") ] init() { Task { let updatedList = [ Test(id: 1, text: "Text1"), Test(id: 2, text: "Text2") ] for updated in updatedList { if let i = await self.list.firstIndex(where: { $0.id == updated.id }) { await MainActor.run(body: { self.list[i].text = updated.text }) } } } } }

fummicc1

@swift-5.6.3 @swift-5.7.3

import Foundation struct Test { var id: Int var text: String } class Model { @MainActor var list: [Test] = [ Test(id: 1, text: ""), Test(id: 2, text: "") ] init() { Task { let updatedList = [ Test(id: 1, text: "Text1"), Test(id: 2, text: "Text2") ] for updated in updatedList { if let i = await self.list.firstIndex(where: { $0.id == updated.id }) { await MainActor.run(body: { self.list[i].text = updated.text }) } } } } }

exit status: 1 with stderr:

<stdin>:23:30: error: actor-isolated property 'list' cannot be passed 'inout' to 'async' function call self.list[i].text = updated.text ^ <stdin>:9:20: note: property declared here @MainActor var list: [Test] = [ ^

fummicc1

@swift-5.6.3 @swift-5.7.3

import Foundation struct Test { var id: Int var text: String } class Model { @MainActor var list: [Test] = [ Test(id: 1, text: ""), Test(id: 2, text: "") ] init() { Task { let updatedList = [ Test(id: 1, text: "Text1"), Test(id: 2, text: "Text2") ] for updated in updatedList { if let i = await self.list.firstIndex(where: { $0.id == updated.id }) { await MainActor.run(body: { self.list[i].text = updated.text }) } } } } }

exit status: 1 with stderr:

<stdin>:23:30: error: actor-isolated property 'list' cannot be passed 'inout' to 'async' function call self.list[i].text = updated.text ^ <stdin>:9:20: note: property declared here @MainActor var list: [Test] = [ ^

@swift-5.6.3

import Foundation struct Test { var id: Int var text: String } class Model { @MainActor var list: [Test] = [ Test(id: 1, text: ""), Test(id: 2, text: "") ] init() { Task { let updatedList = [ Test(id: 1, text: "Text1"), Test(id: 2, text: "Text2") ] for updated in updatedList { if let i = await self.list.firstIndex(where: { $0.id == updated.id }) { await MainActor.run(body: { self.updateText(i: i, value: updated.text) }) } } } } @MainActor private func updateText(i: Int, value: String) { self.list[i].text = value } }

fummicc1

@swift-5.6.3

import Foundation struct Test { var id: Int var text: String } class Model { @MainActor var list: [Test] = [ Test(id: 1, text: ""), Test(id: 2, text: "") ] init() { Task { let updatedList = [ Test(id: 1, text: "Text1"), Test(id: 2, text: "Text2") ] for updated in updatedList { if let i = await self.list.firstIndex(where: { $0.id == updated.id }) { await MainActor.run(body: { self.updateText(i: i, value: updated.text) }) } } } } @MainActor private func updateText(i: Int, value: String) { self.list[i].text = value } }

no output

@swift-5.6.3

import Foundation struct Test { var id: Int var text: String } class Model: @unchecked Sendable { @MainActor var list: [Test] = [ Test(id: 1, text: ""), Test(id: 2, text: "") ] func f() { Task { [self] in await MainActor.run { @MainActor in self.list[0].text = "updated" } } } }

omochimetaru

@swift-5.6.3

import Foundation struct Test { var id: Int var text: String } class Model: @unchecked Sendable { @MainActor var list: [Test] = [ Test(id: 1, text: ""), Test(id: 2, text: "") ] func f() { Task { [self] in await MainActor.run { @MainActor in self.list[0].text = "updated" } } } }

exit status: 1 with stderr:

<stdin>:17:22: error: actor-isolated property 'list' cannot be passed 'inout' to 'async' function call self.list[0].text = "updated" ^ <stdin>:9:20: note: property declared here @MainActor var list: [Test] = [ ^

@swift-5.6.3

import Foundation struct Test { var id: Int var text: String } class Model: @unchecked Sendable { @MainActor var list: [Test] = [ Test(id: 1, text: ""), Test(id: 2, text: "") ] func f() { Task { [self] in await MainActor.run { @MainActor [self] () in self.list[0].text = "updated" } } } }

(edited)

omochimetaru

@swift-5.6.3

import Foundation struct Test { var id: Int var text: String } class Model: @unchecked Sendable { @MainActor var list: [Test] = [ Test(id: 1, text: ""), Test(id: 2, text: "") ] func f() { Task { [self] in await MainActor.run { @MainActor [self] () in self.list[0].text = "updated" } } } }

(edited)

exit status: 1 with stderr:

<stdin>:17:22: error: actor-isolated property 'list' cannot be passed 'inout' to 'async' function call self.list[0].text = "updated" ^ <stdin>:9:20: note: property declared here @MainActor var list: [Test] = [ ^

(edited)

@swift-5.7.3

import Foundation let workCount = 1000 class Counter { let lock = NSLock() var count = 0 func increment() { self.lock.lock() defer { self.lock.unlock() } self.count += 1 } } let counter = Counter() for _ in 0..<workCount { Task { counter.increment() } } Thread.sleep(forTimeInterval: 2) print("counter.count", counter.count)

(edited)

d_date

@swift-5.7.3

import Foundation let workCount = 1000 class Counter { let lock = NSLock() var count = 0 func increment() { self.lock.lock() defer { self.lock.unlock() } self.count += 1 } } let counter = Counter() for _ in 0..<workCount { Task { counter.increment() } } Thread.sleep(forTimeInterval: 2) print("counter.count", counter.count)

(edited)

counter.count 1000 (edited)

@swift-5.6.3

import Foundation let workCount = 1000 class Counter { let lock = NSLock() var count = 0 func increment() { self.lock.lock() defer { self.lock.unlock() } self.count += 1 } } let counter = Counter() for _ in 0..<workCount { Task { counter.increment() } } Thread.sleep(forTimeInterval: 2) print("counter.count", counter.count)

(edited)

d_date

@swift-5.6.3

import Foundation let workCount = 1000 class Counter { let lock = NSLock() var count = 0 func increment() { self.lock.lock() defer { self.lock.unlock() } self.count += 1 } } let counter = Counter() for _ in 0..<workCount { Task { counter.increment() } } Thread.sleep(forTimeInterval: 2) print("counter.count", counter.count)

(edited)

counter.count 1000 (edited)

@swift-5.7.3

import Foundation import FoundationNetworking enum RequestData { @TaskLocal static var requestId: UUID! @TaskLocal static var startDate: Date! } struct Response: Encodable { let user: User let subscription: StripeSubscription } struct User: Encodable { var id: Int } func fetchUser() async throws -> User{ let requestId = RequestData.requestId! defer { print(requestId, "databaseQuery", "isCancelled", Task.isCancelled )} print(requestId, "Making database query") try await Task.sleep(nanoseconds: 500_000_000) print(requestId, "Finished database query") return User(id: 42) } struct StripeSubscription: Encodable { var id: Int} func fetchSubscription() async throws -> StripeSubscription { let requestId = RequestData.requestId! defer { print(requestId, "networkRequest", "isCancelled", Task.isCancelled )} print(requestId, "Making network request") try await Task.sleep(nanoseconds: 500_000_000) print(requestId, "Finished network request") return .init(id: 1729) } func response(for request: URLRequest) async throws -> Data { let requestId = RequestData.requestId! let start = RequestData.startDate! defer { print(requestId, "Request finished in", Date().timeIntervalSince(start)) } Task { print(RequestData.requestId!, "Track analytics") } async let user = fetchUser() async let subscription = fetchSubscription() let jsonData = try await JSONEncoder().encode( Response( user: user, subscription: subscription ) ) return jsonData } RequestData.$requestId.withValue(UUID()) { RequestData.$startDate.withValue(Date()) { let task = Task { _ = try await response(for: .init(url: .init(string: "https://www.pointfree.co")!)) } Thread.sleep(forTimeInterval: 0.1) } } Thread.sleep(forTimeInterval: 5)

(edited)

d_date

@swift-5.7.3

import Foundation import FoundationNetworking enum RequestData { @TaskLocal static var requestId: UUID! @TaskLocal static var startDate: Date! } struct Response: Encodable { let user: User let subscription: StripeSubscription } struct User: Encodable { var id: Int } func fetchUser() async throws -> User{ let requestId = RequestData.requestId! defer { print(requestId, "databaseQuery", "isCancelled", Task.isCancelled )} print(requestId, "Making database query") try await Task.sleep(nanoseconds: 500_000_000) print(requestId, "Finished database query") return User(id: 42) } struct StripeSubscription: Encodable { var id: Int} func fetchSubscription() async throws -> StripeSubscription { let requestId = RequestData.requestId! defer { print(requestId, "networkRequest", "isCancelled", Task.isCancelled )} print(requestId, "Making network request") try await Task.sleep(nanoseconds: 500_000_000) print(requestId, "Finished network request") return .init(id: 1729) } func response(for request: URLRequest) async throws -> Data { let requestId = RequestData.requestId! let start = RequestData.startDate! defer { print(requestId, "Request finished in", Date().timeIntervalSince(start)) } Task { print(RequestData.requestId!, "Track analytics") } async let user = fetchUser() async let subscription = fetchSubscription() let jsonData = try await JSONEncoder().encode( Response( user: user, subscription: subscription ) ) return jsonData } RequestData.$requestId.withValue(UUID()) { RequestData.$startDate.withValue(Date()) { let task = Task { _ = try await response(for: .init(url: .init(string: "https://www.pointfree.co")!)) } Thread.sleep(forTimeInterval: 0.1) } } Thread.sleep(forTimeInterval: 5)

(edited)

61E1B2B1-A445-4E76-A697-99C55BDBA919 Making database query 61E1B2B1-A445-4E76-A697-99C55BDBA919 Track analytics 61E1B2B1-A445-4E76-A697-99C55BDBA919 Making network request 61E1B2B1-A445-4E76-A697-99C55BDBA919 Finished network request 61E1B2B1-A445-4E76-A697-99C55BDBA919 networkRequest isCancelled false 61E1B2B1-A445-4E76-A697-99C55BDBA919 Finished database query 61E1B2B1-A445-4E76-A697-99C55BDBA919 databaseQuery isCancelled false 61E1B2B1-A445-4E76-A697-99C55BDBA919 Request finished in 0.5015460252761841

stderr:

<stdin>:58:9: warning: initialization of immutable value 'task' was never used; consider replacing with assignment to '_' or removing it let task = Task { ~~~~^~~~ _

(edited)

@swift-5.6.3

@preconcurrency import Foundation import FoundationNetworking enum RequestData { @TaskLocal static var requestId: UUID! @TaskLocal static var startDate: Date! } struct Response: Encodable { let user: User let subscription: StripeSubscription } struct User: Encodable { var id: Int } func fetchUser() async throws -> User{ let requestId = RequestData.requestId! defer { print(requestId, "databaseQuery", "isCancelled", Task.isCancelled )} print(requestId, "Making database query") try await Task.sleep(nanoseconds: 500_000_000) print(requestId, "Finished database query") return User(id: 42) } struct StripeSubscription: Encodable { var id: Int} func fetchSubscription() async throws -> StripeSubscription { let requestId = RequestData.requestId! defer { print(requestId, "networkRequest", "isCancelled", Task.isCancelled )} print(requestId, "Making network request") try await Task.sleep(nanoseconds: 500_000_000) print(requestId, "Finished network request") return .init(id: 1729) } func response(for request: URLRequest) async throws -> Data { let requestId = RequestData.requestId! let start = RequestData.startDate! defer { print(requestId, "Request finished in", Date().timeIntervalSince(start)) } Task { print(RequestData.requestId!, "Track analytics") } async let user = fetchUser() async let subscription = fetchSubscription() let jsonData = try await JSONEncoder().encode( Response( user: user, subscription: subscription ) ) return jsonData } RequestData.$requestId.withValue(UUID()) { RequestData.$startDate.withValue(Date()) { let task = Task { _ = try await response(for: .init(url: .init(string: "https://www.pointfree.co")!)) } Thread.sleep(forTimeInterval: 0.1) } } Thread.sleep(forTimeInterval: 5)

(edited)

d_date

@swift-5.6.3

@preconcurrency import Foundation import FoundationNetworking enum RequestData { @TaskLocal static var requestId: UUID! @TaskLocal static var startDate: Date! } struct Response: Encodable { let user: User let subscription: StripeSubscription } struct User: Encodable { var id: Int } func fetchUser() async throws -> User{ let requestId = RequestData.requestId! defer { print(requestId, "databaseQuery", "isCancelled", Task.isCancelled )} print(requestId, "Making database query") try await Task.sleep(nanoseconds: 500_000_000) print(requestId, "Finished database query") return User(id: 42) } struct StripeSubscription: Encodable { var id: Int} func fetchSubscription() async throws -> StripeSubscription { let requestId = RequestData.requestId! defer { print(requestId, "networkRequest", "isCancelled", Task.isCancelled )} print(requestId, "Making network request") try await Task.sleep(nanoseconds: 500_000_000) print(requestId, "Finished network request") return .init(id: 1729) } func response(for request: URLRequest) async throws -> Data { let requestId = RequestData.requestId! let start = RequestData.startDate! defer { print(requestId, "Request finished in", Date().timeIntervalSince(start)) } Task { print(RequestData.requestId!, "Track analytics") } async let user = fetchUser() async let subscription = fetchSubscription() let jsonData = try await JSONEncoder().encode( Response( user: user, subscription: subscription ) ) return jsonData } RequestData.$requestId.withValue(UUID()) { RequestData.$startDate.withValue(Date()) { let task = Task { _ = try await response(for: .init(url: .init(string: "https://www.pointfree.co")!)) } Thread.sleep(forTimeInterval: 0.1) } } Thread.sleep(forTimeInterval: 5)

(edited)

2C9A9B92-608A-4F07-A935-BB5C5A212108 Making database query 2C9A9B92-608A-4F07-A935-BB5C5A212108 Track analytics 2C9A9B92-608A-4F07-A935-BB5C5A212108 Making network request 2C9A9B92-608A-4F07-A935-BB5C5A212108 Finished network request 2C9A9B92-608A-4F07-A935-BB5C5A212108 Finished database query 2C9A9B92-608A-4F07-A935-BB5C5A212108 databaseQuery isCancelled false 2C9A9B92-608A-4F07-A935-BB5C5A212108 networkRequest isCancelled false 2C9A9B92-608A-4F07-A935-BB5C5A212108 Request finished in 0.5029729604721069

stderr:

<stdin>:58:9: warning: initialization of immutable value 'task' was never used; consider replacing with assignment to '_' or removing it let task = Task { ~~~~^~~~ _

(edited)

Swiftのversionで挙動が違う？

6:12 AM

そんなことはないか

Xcode 14 beta 2だと特定のConcurrencyのコードでクラッシュしたり、printされないというのがあって、昨日からこっちでも試していたところ

おお。そんなことがあるんですね。beta 1は特になかった気がしたけど、2は触ってないな・・

これはMemory read errorでクラッシュ https://discord.com/channels/291054398077927425/430242233468452865/991353751556325477

6:16 AM

これはprintされないので多分トップレベルでの挙動が怪しい（Xcode 13.4.1はされる） https://discord.com/channels/291054398077927425/430242233468452865/991579414288683068

d_date

これはMemory read errorでクラッシュ https://discord.com/channels/291054398077927425/430242233468452865/991353751556325477

うーん、これ再現しないなぁ。

6:49 AM

こちら普通のexecutableTargetで試しました。

僕もbeta2落としてやってみましたが再現せずですね

6:49 AM

playgroundと雑にswift runでしかやってないですが

6:51 AM

x86_64です

arm64

僕もexecutableTargetでやってるんだけどなぁ

2:15 AM

最小構成になってないのかもしれない。もうちょっといじってみます。

@swift-5.6.3 actor A { func foo() {} func bar() { Task { foo() } Task { [weak self] in self?.foo() } } }

shiz

@swift-5.6.3 actor A { func foo() {} func bar() { Task { foo() } Task { [weak self] in self?.foo() } } }

exit status: 1 with stderr:

<stdin>:5:31: error: expression is 'async' but is not marked with 'await' Task { [weak self] in self?.foo() } ^~~~~~~~~~~ await <stdin>:5:31: note: calls to instance method 'foo()' from outside of its actor context are implicitly asynchronous Task { [weak self] in self?.foo() } ^

actorの場合、selfキャプチャするとinheritしない。@MainActorはOK。 (edited)

@swift-5.6.3 @MainActor class C { func foo() {} func bar() { Task { foo() } Task { [weak self] in self?.foo() } } }

shiz

@swift-5.6.3 @MainActor class C { func foo() {} func bar() { Task { foo() } Task { [weak self] in self?.foo() } } }

no output

@swift-5.7.3

let pattern = #"Hello, (?<world>.*)"# let regexRuntime = try Regex(pattern) let matches = "Hello, Swift".matches(of: regexRuntime) if let m = matches[0].as((Substring, world: Substring).self) { print(m.world) }

ainame

@swift-5.7.3

let pattern = #"Hello, (?<world>.*)"# let regexRuntime = try Regex(pattern) let matches = "Hello, Swift".matches(of: regexRuntime) if let m = matches[0].as((Substring, world: Substring).self) { print(m.world) }

exit status: 1 with stderr:

<stdin>:2:24: error: cannot find 'Regex' in scope let regexRuntime = try Regex(pattern) ^~~~~ <stdin>:3:30: error: value of type 'String' has no member 'matches' let matches = "Hello, Swift".matches(of: regexRuntime) ~~~~~~~~~~~~~~ ^~~~~~~

@swift-5.7.3

import _StringProcessing let pattern = #"Hello, (?<world>.*)"# let regexRuntime = try Regex(pattern) let matches = "Hello, Swift".matches(of: regexRuntime) if let m = matches[0].as((Substring, world: Substring).self) { print(m.world) }

Kishikawa Katsumi

@swift-5.7.3

import _StringProcessing let pattern = #"Hello, (?<world>.*)"# let regexRuntime = try Regex(pattern) let matches = "Hello, Swift".matches(of: regexRuntime) if let m = matches[0].as((Substring, world: Substring).self) { print(m.world) }

exit status: 1 with stderr:

<stdin>:6:23: error: value of type 'Regex<AnyRegexOutput>.Match' has no dynamic member 'as' using key path from root type 'AnyRegexOutput' if let m = matches[0].as((Substring, world: Substring).self) { ~~~~~~~~~~ ^~

Linuxにはそもそも実装されてないのかな。（iOSではコンパイルまではできて実行するとNot implementedだった。）

どこにOS依存があるんだろう、、

わからなかった。

3:44 AM

nightly-mainだとまたちょっと違うエラーになるのよね。どういうふうに取り込まれてるのかよくわからない。

string-processingリポジトリ、breaking changeが割と頻繁に入る気がする

3:45 AM

完全に同一のバージョンじゃないと何も信頼できない…

それはわかる。mainを指定しているとちょいちょい変わるのがわかる。

@swift-5.1.5 protocol P {} struct S: P {} let foo: some P = S()

Iceman

@swift-5.1.5 protocol P {} struct S: P {} let foo: some P = S()

no output

@swift-5.6.3 -Xfrontend -parse-as-library

protocol P { func foo() async } struct S: P { func foo() async { print("async version") } func foo() { print("sync version") } } func takeP<X: P>(_ x: X) async { await x.foo() } @main struct Entry { static func main() async { await takeP(S()) } }

(edited)

Yuta Saito

@swift-5.6.3 -Xfrontend -parse-as-library

protocol P { func foo() async } struct S: P { func foo() async { print("async version") } func foo() { print("sync version") } } func takeP<X: P>(_ x: X) async { await x.foo() } @main struct Entry { static func main() async { await takeP(S()) } }

(edited)

sync version (edited)

これ同名のasyncメソッドとsyncメソッドがある場合、sync版がコンフォーマンスに使われるんですね…

マジ？？？

2:25 PM

さすがに意図してなさそうー

これで4時間とかした

2:26 PM

一応レポートしておくか…

うーんでも、コールバックも何もない同期版があるのも

2:26 PM

不自然な前提だな

まあレポートしたところで流石にもう変えられないだろうけど

swift6からならいけんじゃね

ワンちゃん

ちょいちょい動作かわりうる変更も採用されとる

えー、そうなのかー

あの、anyの存在型にするときに、今まで扱えなかったwhereが扱えるようになることで型情報がより適切になるけど、その結果としてオーバーロード解決が変わる話とか

あー、あれか。確かに。

暗黙のopenが今までAnyに対して発動しなかったけど6からはかわるやつとか

2:35 PM

だからオーバーロード周りは結構やってるんだよね

2:35 PM

個人的にはrequirements割り当ても、オーバーロードの一種だから、ありな気がする

ありえる気になってきた。真面目にチケット書こう

1

https://github.com/apple/swift-evolution/blob/main/proposals/0296-async-await.md#overloading-and-overload-resolution

swift-evolution/0296-async-await.md at main · apple/swift-evolution

This maintains proposals for changes and user-visible enhancements to the Swift Programming Language. - swift-evolution/0296-async-await.md at main · apple/swift-evolution

2:39 PM

asyncとsyncのオーバーロードを許す結論が出たのはこのタイミングだけど

2:39 PM

protocol conformanceについての言及は無かったみたいだね

ちょうどその辺見てました

特に誰も気にしてなかったからたまたま実装が仕様になったやつな気がする

そんな雰囲気

Filed https://github.com/apple/swift/issues/60318

Prefer overloaded witnesses with 'async'-ness matching in protocol ...

Describe the bug Currently, an async method requirement in a protocol prefers a sync method even if having both sync and async overload. This would be a follow-up of #57476, which allows having ove...

2

@swift-5.7.3 @swift-5.6.3

@rethrows internal protocol _ErrorMechanism { associatedtype Output func get() throws -> Output } extension _ErrorMechanism { internal func _rethrowGet() rethrows -> Output { return try get() } } extension Result: _ErrorMechanism { } @rethrows protocol P { func foo() throws } struct S1: P { func foo() {} } struct E: Error {} func foo<T: P>(_: T.Type) rethrows { _ = try Result<Int, Error>.failure(E())._rethrowGet() } print("start program") foo(S1.self) print("end program")

(edited)

Yuta Saito

@swift-5.7.3 @swift-5.6.3

@rethrows internal protocol _ErrorMechanism { associatedtype Output func get() throws -> Output } extension _ErrorMechanism { internal func _rethrowGet() rethrows -> Output { return try get() } } extension Result: _ErrorMechanism { } @rethrows protocol P { func foo() throws } struct S1: P { func foo() {} } struct E: Error {} func foo<T: P>(_: T.Type) rethrows { _ = try Result<Int, Error>.failure(E())._rethrowGet() } print("start program") foo(S1.self) print("end program")

(edited)

exit status: 139 with stderr:

Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -new-driver-path /usr/bin/swift-driver -empty-abi-descriptor -resource-dir /usr/lib/swift -module-name main 1. Swift version 5.7-dev (LLVM d5f117e38620783, Swift 260a80fcce5a2ab) 2. Compiling with the current language version 3. While running user code "<stdin>"

(edited)

Yuta Saito

@swift-5.7.3 @swift-5.6.3

@rethrows internal protocol _ErrorMechanism { associatedtype Output func get() throws -> Output } extension _ErrorMechanism { internal func _rethrowGet() rethrows -> Output { return try get() } } extension Result: _ErrorMechanism { } @rethrows protocol P { func foo() throws } struct S1: P { func foo() {} } struct E: Error {} func foo<T: P>(_: T.Type) rethrows { _ = try Result<Int, Error>.failure(E())._rethrowGet() } print("start program") foo(S1.self) print("end program")

(edited)

exit status: 139 with stderr:

Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -new-driver-path /usr/bin/swift-driver -resource-dir /usr/lib/swift -module-name main 1. Swift version 5.6.2 (swift-5.6.2-RELEASE) 2. Compiling with the current language version 3. While running user code "<stdin>" Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it): /usr/bin/swift-frontend[0x5187de3] /usr/bin/swift-frontend[0x5185b7e] /usr/bin/swift-frontend[0x5188176] /lib/x86_64-linux-gnu/libpthread.so.0(+0x12980)[0x7f1e8c7a9980] [0x7f1e8cbdb240] [0x7acf840]

(edited)

引数と関係なく例外投げてるから？

3:48 PM

これ普通に throw E() って書いたらコンパイルエラーになるの？

なります

3:49 PM

関係ないrethrowsメソッドが呼べちゃうのがまずい

じゃあ型パラメータTと連動してない事を見逃してるのか

で、このunsoundnessをasync-algorithmsが使っててひっくり返った https://github.com/apple/swift-async-algorithms/blob/c0fdfdb8aa2b263799ebafc6f11c62f01e838f71/Sources/AsyncAlgorithms/Rethrow.swift#L16-L34

swift-async-algorithms/Rethrow.swift at c0fdfdb8aa2b263799ebafc6f11...

Async Algorithms for Swift. Contribute to apple/swift-async-algorithms development by creating an account on GitHub.

えええw

AsyncSequenceの要件、正しくrethrowsチェッカーを納得させながら実装するの難しいんですよね

3:53 PM

なのでこれが欲しくなる気持ちは分かるんだけど、マジ…という感じ

S1のfooはthrowsじゃないからfoo<S1>はnon throwsなはずなんだけど、この不思議な書き方をするとコンパイラを騙せちゃって中からthrowできちゃうということ‥‥？

5:10 PM

単に関数のシグネチャに現れてない他所のrethrowsさんを呼び出せてしまえるのか

@swift-5.7.3

@MainActor class Foo {     @discardableResult     func bar() -> Int { 1 } } Task {     await Foo().bar()     return }

(edited)

nanasi

@swift-5.7.3

@MainActor class Foo {     @discardableResult     func bar() -> Int { 1 } } Task {     await Foo().bar()     return }

(edited)

stderr:

<stdin>:3:1: warning: non-breaking space (U+00A0) used instead of regular space     @discardableResult <stdin>:3:4: warning: non-breaking space (U+00A0) used instead of regular space     @discardableResult <stdin>:4:1: warning: non-breaking space (U+00A0) used instead of regular space     func bar() -> Int { 1 } <stdin>:4:4: warning: non-breaking space (U+00A0) used instead of regular space     func bar() -> Int { 1 } <stdin>:8:1: warning: non-breaking space (U+00A0) used instead of regular space     await Foo().bar() <stdin>:8:4: warning: non-breaking space (U+00A0) used instead of regular space     await Foo().bar() <stdin>:9:1: warning: non-breaking space (U+00A0) used instead of regular space     return <stdin>:9:4: warning: non-breaking space (U+00A0) used instead of regular space     return <stdin>:8:19: warning: result of call to function returning 'Int' is unused     await Foo().bar()

(edited)

@swift-5.7.3 actor Foo { @discardableResult func bar() -> Int { 1 } } Task { await Foo().bar() return }

nanasi

@swift-5.7.3 actor Foo { @discardableResult func bar() -> Int { 1 } } Task { await Foo().bar() return }

stderr:

<stdin>:2:1: warning: non-breaking space (U+00A0) used instead of regular space     @discardableResult <stdin>:2:4: warning: non-breaking space (U+00A0) used instead of regular space     @discardableResult <stdin>:3:1: warning: non-breaking space (U+00A0) used instead of regular space     func bar() -> Int { 1 } <stdin>:3:4: warning: non-breaking space (U+00A0) used instead of regular space     func bar() -> Int { 1 } <stdin>:7:1: warning: non-breaking space (U+00A0) used instead of regular space     await Foo().bar() <stdin>:7:4: warning: non-breaking space (U+00A0) used instead of regular space     await Foo().bar() <stdin>:8:1: warning: non-breaking space (U+00A0) used instead of regular space     return <stdin>:8:4: warning: non-breaking space (U+00A0) used instead of regular space     return

@swift-main

class A { init(name: String) { self.name = name } var name: String deinit { print("deinit \(name)") } } func main() { let a = A(name: "a") defer { print("defer") } let b = A(name: "b") use(a) use(b) } func use<T>(_ x: T) { } main()

omochimetaru

@swift-main

class A { init(name: String) { self.name = name } var name: String deinit { print("deinit \(name)") } } func main() { let a = A(name: "a") defer { print("defer") } let b = A(name: "b") use(a) use(b) } func use<T>(_ x: T) { } main()

deinit b defer deinit a

@swift-5.6.3 @swift-5.7.3 struct S<T> { struct I {} func f() where T == I {} }

Iceman

@swift-5.6.3 @swift-5.7.3 struct S<T> { struct I {} func f() where T == I {} }

exit status: 1 with stderr:<stdin>:3:20: error: same-type constraint 'T' == 'S<T>.I' is recursive func f() where T == I {} ^

Iceman

@swift-5.6.3 @swift-5.7.3 struct S<T> { struct I {} func f() where T == I {} }

exit status: 1 with stderr:

<stdin>:3:12: error: cannot build rewrite system for generic signature; concrete nesting limit exceeded func f() where T == I {} ^ <stdin>:3:12: note: failed rewrite rule is τ_0_0.[concrete: S<S<S<S<S<S<S<S<S<S<S<S<S<S<S<τ_0_0>.I>.I>.I>.I>.I>.I>.I>.I>.I>.I>.I>.I>.I>.I>.I] => τ_0_0 func f() where T == I {} ^

1

Herokuが無料プランの提供を終了するらしい https://blog.heroku.com/next-chapter

Heroku’s Next Chapter

Back in May, I wrote (https://blog.heroku.com/we-heard-your-feedback) about my enthusiasm to be part of the Heroku story, and I remain just as...

残念ですね

Herokuを有料プランにするか、別の無料サービス（使えるものがあるのか不明）へ切り替えるか、どちらにしても今のSwiftBotの運用形態は変える必要がある。 (edited)

1:32 AM

できれば実装もDenoからSwiftへ戻したい

Free PlanがあるものでSwiftが動かせそうなというとRenderでしょうね。

RenderのFree PlanではBackground Workersは使えないみたい。

Free plans are only available for Web Services and databases. They cannot be used for Private Services, Background Workers, or Cron Jobs.

https://render.com/docs/free#free-web-services

Web Serviceを使えばいいと思いますよ

1:45 AM

すべてのRouteで404を返すとかで適当にすればいいと思います。

Web Serviceへ定期的にping送ってインスタンス維持とかってことですか？ (edited)

Renderはスリープしないです。

1:47 AM

あ、もちろんインスタンスのスケーリングでゼロインスタンスまで縮小するようにしたらそうなりますけど。

1:47 AM

あ、Freeだとスケーリングの設定がないからゼロインスタンスになるのかな？

1:47 AM

そうだとしてもMonitorのサービスと組み合わせて起こせばいいです。

1:48 AM

Monitorのサービスは無料プランがあるのはたくさんある。

Free Planの説明には15分で止まると書かれてました。

Web Services on the free plan are automatically spun down after 15 minutes of inactivity.

簡単にGitHub Actionでもいいかも

1:50 AM

モニターのサービスかGitHub Actionsかで起こせばいいと思います。

1:50 AM

GASというても。

TOSでそういったのを禁止してるサービスとか他にあるけど、Renderはどうかな？ Render Acceptable Use Policy の 2 に抵触しそう。 https://render.com/acceptable-use (edited)

数分に１回のヘルスチェックをするのは問題ないと思いますね。

1:53 AM

普通の行為だと思う。

ふむ。

そもそもRenderのFree Tierは750時間（≒１か月）/月で、それをどう配分するかなので、１つのサービスがスリープせずに動き続けるのであればサービス１つだけが無料だし、

なるほど。

適当にスリープしてもいいやつなら３つ４つ動かせるかも、だからFree Tierのリクエスト数は２番にあるような非常識な間隔でやらなければ、変わらない、と仕組みとしてはそう。

1:56 AM

リクエスト数というかインスタンスの使用時間。

現在みたいに複数バージョンのSwiftコンパイラを使えるようにしようとすると、Free PlanのRenderアカウントが一つでは無理そう。

2:07 AM

複数のRenderアカウント作っても問題ないのかな

Herokuでは「複数アカウント作成してはいけない」的な記述をTOSで見つけられなかったから作ってた。しかし、そもそも「複数アカウント作成してはいけない」がTOSに書かれる場合、どの様に記述されるのかを知らないから、ちゃんと探せてる自信がない。

それはわからないですが、工夫でなんとかできるならDockerイメージサイズの上限はかなり余裕があるので複数のSwiftバージョンを同梱した１つのイメージを作るっていうのは動くんじゃないかな。

2:17 AM

複数のSwiftバージョンの同居は普通にMacでもLinuxでやることだし、同じようなDockerイメージを作ったらいいと思う。

いろいろありがとうございます。検討してみます。

ちなみに、レスポンスはちょっと変わりますがSwiftFiddle.comのAPIは自由に使って大丈夫ですよ。

curl -X POST "https://swiftfiddle.com/runner/5.5.2/run" \ -H "Content-Type:application/json" \ --data '{"code": "import Foundation\nprint(\"Hello World\")”}'

今のところ全バージョンのSwiftがあります。 (edited)

https://railway.app/ と https://fly.io もDockerfileをデプロイできてFree Planがあるみたいですね。

3:15 AM

どっちも使ったことないからわからない。Herokuで動かしてるやつを移行してみるかな。

@swift-5.6.3 @swift-main

import Foundation @propertyWrapper struct Wrapper<Value> { var wrappedValue: Value var projectedValue: Self { get { self } set { self = newValue } } init(wrappedValue: Value) { self.wrappedValue = wrappedValue } init(projectedValue: Self) { self = projectedValue } } struct Foo { init(@Wrapper val: Int) {} } func call() { @Wrapper var val = 10 Foo($val: _val) } call()

(edited)

nanasi

@swift-5.6.3 @swift-main

import Foundation @propertyWrapper struct Wrapper<Value> { var wrappedValue: Value var projectedValue: Self { get { self } set { self = newValue } } init(wrappedValue: Value) { self.wrappedValue = wrappedValue } init(projectedValue: Self) { self = projectedValue } } struct Foo { init(@Wrapper val: Int) {} } func call() { @Wrapper var val = 10 Foo($val: _val) } call()

(edited)

exit status: 139 with stderr:

<stdin>:24:5: warning: result of 'Foo' initializer is unused Foo($val: _val) ^ ~~~~~~~~~~~~ Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -new-driver-path /usr/bin/swift-driver -resource-dir /usr/lib/swift -module-name main 1. Swift version 5.6.2 (swift-5.6.2-RELEASE) 2. Compiling with the current language version 3. While evaluating request TypeCheckSourceFileRequest(source_file "<stdin>") 4. While evaluating request TypeCheckFunctionBodyRequest(main.(file).call()@<stdin>:22:6) 5. While computing captures for 'call()' (at <stdin>:22:1) Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it): /usr/bin/swift-frontend[0x5187de3] /usr/bin/swift-frontend[0x5185b7e] /usr/bin/swift-frontend[0x5188176] /lib/x86_64-linux-gnu/libpthread.so.0(+0x12980)[0x7fab3d796980] /usr/bin/swift-frontend[0x13188ba] /usr/bin/swift-frontend[0x13194dc] /usr/bin/swift-frontend[0x1541a35] /usr/bin/swift-frontend[0x15418ff] /usr/bin/swift-frontend[0x1541b3d] /usr/bin/swift-frontend[0x15434b2] /usr/bin/swift-frontend[0x1541224] /usr/bin/swift-frontend[0x13181eb] /usr/bin/swift-frontend[0x12498c8] /usr/bin/swift-frontend[0x1606f12] /usr/bin/swift-frontend[0x1606d9f] /usr/bin/swift-frontend[0x158e8de] /usr/bin/swift-frontend[0x158e8ba] /usr/bin/swift-frontend[0x12770d9] /usr/bin/swift-frontend[0x1278b21] /usr/bin/swift-frontend[0x12789bb] /usr/bin/swift-frontend[0x1276f6a] /usr/bin/swift-frontend[0x1276f44] /usr/bin/swift-frontend[0x649619] /usr/bin/swift-frontend[0x48df47] /usr/bin/swift-frontend[0x4463af] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7)[0x7fab3ba04c87] /usr/bin/swift-frontend[0x445dda]

(edited)

nanasi

@swift-5.6.3 @swift-main

import Foundation @propertyWrapper struct Wrapper<Value> { var wrappedValue: Value var projectedValue: Self { get { self } set { self = newValue } } init(wrappedValue: Value) { self.wrappedValue = wrappedValue } init(projectedValue: Self) { self = projectedValue } } struct Foo { init(@Wrapper val: Int) {} } func call() { @Wrapper var val = 10 Foo($val: _val) } call()

(edited)

exit status: 134 with stderr:

swift-frontend: /home/build-user/llvm-project/llvm/include/llvm/ADT/ArrayRef.h:256: const T &llvm::ArrayRef<swift::AppliedPropertyWrapper>::operator[](size_t) const [T = swift::AppliedPropertyWrapper]: Assertion `Index < Length && "Invalid index!"' failed. Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -new-driver-path /usr/bin/swift-driver -empty-abi-descriptor -resource-dir /usr/lib/swift -module-name main 1. Swift version 5.8-dev (LLVM f6b60d5b8f4b443, Swift ecccce61139bbc4) 2. Compiling with the current language version 3. While evaluating request TypeCheckSourceFileRequest(source_file "<stdin>") 4. While evaluating request TypeCheckFunctionBodyRequest(main.(file).call()@<stdin>:22:6) 5. While type-checking statement at [<stdin>:22:13 - line:25:1] RangeText="{ @Wrapper var val = 10 Foo($val: _val) " 6. While type-checking expression at [<stdin>:24:5 - line:24:19] RangeText="Foo($val: _val" 7. While type-checking-target starting at <stdin>:24:5 Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it): /usr/bin/swift-frontend[0x66fdb63] /usr/bin/swift-frontend[0x66fb89e] /usr/bin/swift-frontend[0x66fdeef] /lib/x86_64-linux-gnu/libpthread.so.0(+0x14420)[0x7fc65d4b3420] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0xcb)[0x7fc65c92500b] /lib/x86_64-linux-gnu/libc.so.6(abort+0x12b)[0x7fc65c904859] /lib/x86_64-linux-gnu/libc.so.6(+0x22729)[0x7fc65c904729] /lib/x86_64-linux-gnu/libc.so.6(+0x33fd6)[0x7fc65c915fd6] /usr/bin/swift-frontend[0x17279a0] /usr/bin/swift-frontend[0x172f367] /usr/bin/swift-frontend[0x172fe15] /usr/bin/swift-frontend[0x1734eb7] /usr/bin/swift-frontend[0x171a733] /usr/bin/swift-frontend[0x1bef4e6] /usr/bin/swift-frontend[0x17125a1] /usr/bin/swift-frontend[0x1711ee2] /usr/bin/swift-frontend[0x15e0e0a] /usr/bin/swift-frontend[0x15e0c4d] /usr/bin/swift-frontend[0x15e0b2d]

(edited)

@swift-5.7.3 @swift-main @propertyWrapper struct Wrapper { var wrappedValue: Int { 10 } } func call() { @Wrapper var int print(int) } call() (edited)

nanasi

@swift-5.7.3 @swift-main @propertyWrapper struct Wrapper { var wrappedValue: Int { 10 } } func call() { @Wrapper var int print(int) } call() (edited)

exit status: 1 with stderr:

<stdin>:8:3: error: found an unexpected second identifier in variable declaration; is there an accidental break? print(int) ^ <stdin>:8:3: note: join the identifiers together print(int) ~~^~~~~ intprint <stdin>:8:3: note: join the identifiers together with camel-case print(int) ~~^~~~~ intPrint <stdin>:8:8: error: consecutive statements on a line must be separated by ';' print(int) ^ ; <stdin>:8:9: warning: expression of type 'Int' is unused print(int) ^~~

(edited)

nanasi

@swift-5.7.3 @swift-main @propertyWrapper struct Wrapper { var wrappedValue: Int { 10 } } func call() { @Wrapper var int print(int) } call() (edited)

10

@swift-5.6.3 @swift-5.7.3 extension String? {}

novr

@swift-5.6.3 @swift-5.7.3 extension String? {}

no output

novr

@swift-5.6.3 @swift-5.7.3 extension String? {}

exit status: 1 with stderr:

<stdin>:1:1: error: constrained extension must be declared on the unspecialized generic type 'Optional' with constraints specified by a 'where' clause extension String? {} ^ ~~~~~~~

@swift-5.7.3 @swift-main

private extension Equatable { func isEquals(_ other: any Equatable) -> Bool { guard let other = other as? Self else { return false } return self == other } } public func == (lhs: any Equatable, rhs: any Equatable) -> Bool { lhs.isEquals(rhs) } let i: any Equatable = 1 let d: any Equatable = 1.0 let i2: any Equatable = 1 print(i == d) print(i == i2)

nanasi

@swift-5.7.3 @swift-main

private extension Equatable { func isEquals(_ other: any Equatable) -> Bool { guard let other = other as? Self else { return false } return self == other } } public func == (lhs: any Equatable, rhs: any Equatable) -> Bool { lhs.isEquals(rhs) } let i: any Equatable = 1 let d: any Equatable = 1.0 let i2: any Equatable = 1 print(i == d) print(i == i2)

exit status: 139 with stderr:

Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -new-driver-path /usr/bin/swift-driver -empty-abi-descriptor -resource-dir /usr/lib/swift -module-name main 1. Swift version 5.7.1 (swift-5.7.1-RELEASE) 2. Compiling with the current language version 3. While running user code "<stdin>" Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it): /usr/bin/swift-frontend(+0x551a083)[0x5643df6e6083] /usr/bin/swift-frontend(+0x5517fae)[0x5643df6e3fae] /usr/bin/swift-frontend(+0x551a40a)[0x5643df6e640a] /lib/x86_64-linux-gnu/libc.so.6(+0x42520)[0x7ffa50f4d520] /usr/lib/swift/linux/libswiftCore.so(+0x42192f)[0x7ffa518e192f] /usr/lib/swift/linux/libswiftCore.so(+0x3fad00)[0x7ffa518bad00]

nanasi

@swift-5.7.3 @swift-main

private extension Equatable { func isEquals(_ other: any Equatable) -> Bool { guard let other = other as? Self else { return false } return self == other } } public func == (lhs: any Equatable, rhs: any Equatable) -> Bool { lhs.isEquals(rhs) } let i: any Equatable = 1 let d: any Equatable = 1.0 let i2: any Equatable = 1 print(i == d) print(i == i2)

exit status: 139 with stderr:

Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -new-driver-path /usr/bin/swift-driver -empty-abi-descriptor -resource-dir /usr/lib/swift -module-name main 1. Swift version 5.8-dev (LLVM 1299cdab04e4506, Swift 56665d5ce9f6420) 2. Compiling with the current language version 3. While running user code "<stdin>" Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it): /usr/bin/swift-frontend[0x6954fe3] /usr/bin/swift-frontend[0x6952d1e] /usr/bin/swift-frontend[0x695536f] /lib/x86_64-linux-gnu/libpthread.so.0(+0x14420)[0x7f363d0e5420] /usr/lib/swift/linux/libswiftCore.so(+0x3f2c49)[0x7f363ce8dc49] /usr/lib/swift/linux/libswiftCore.so(+0x3d0ba0)[0x7f363ce6bba0]

@swift-5.7.3 @swift-main

private extension Equatable { func isEquals(_ other: any Equatable) -> Bool { guard let other = other as? Self else { return false } return self == other } } public func == (lhs: any Equatable, rhs: any Equatable) -> Bool { lhs.isEquals(rhs) } let i: any Equatable = 1 let d: any Equatable = 1.0 let i2: any Equatable = 1 print(i == d) // print(i == i2)

(edited)

nanasi

@swift-5.7.3 @swift-main

private extension Equatable { func isEquals(_ other: any Equatable) -> Bool { guard let other = other as? Self else { return false } return self == other } } public func == (lhs: any Equatable, rhs: any Equatable) -> Bool { lhs.isEquals(rhs) } let i: any Equatable = 1 let d: any Equatable = 1.0 let i2: any Equatable = 1 print(i == d) // print(i == i2)

(edited)

false (edited)

nanasi

@swift-5.7.3 @swift-main

private extension Equatable { func isEquals(_ other: any Equatable) -> Bool { guard let other = other as? Self else { return false } return self == other } } public func == (lhs: any Equatable, rhs: any Equatable) -> Bool { lhs.isEquals(rhs) } let i: any Equatable = 1 let d: any Equatable = 1.0 let i2: any Equatable = 1 print(i == d) // print(i == i2)

(edited)

false (edited)

@swift-5.7.3

private extension Equatable { func isEquals(_ other: any Equatable) -> Bool { guard let other = other as? Self else { return false } let op: (Self, Self) -> Bool = (==) return op(self, other) } } public func == (lhs: any Equatable, rhs: any Equatable) -> Bool { lhs.isEquals(rhs) } let i: any Equatable = 1 let d: any Equatable = 1.0 let i2: any Equatable = 1 print(i == d) print(i == i2)

(edited)

nanasi

@swift-5.7.3

private extension Equatable { func isEquals(_ other: any Equatable) -> Bool { guard let other = other as? Self else { return false } let op: (Self, Self) -> Bool = (==) return op(self, other) } } public func == (lhs: any Equatable, rhs: any Equatable) -> Bool { lhs.isEquals(rhs) } let i: any Equatable = 1 let d: any Equatable = 1.0 let i2: any Equatable = 1 print(i == d) print(i == i2)

(edited)

false true (edited)

@swift-5.7.3 protocol P {} struct S: P {} func f1() -> some P { S() } func f2() -> () -> some P { { S() } }

Iceman

@swift-5.7.3 protocol P {} struct S: P {} func f1() -> some P { S() } func f2() -> () -> some P { { S() } }

exit status: 1 with stderr:<stdin>:8:5: error: cannot convert value of type 'S' to closure result type 'some P' { S() } ^~~

SE-0328で関数型の返り値にsome使えるようになったように見えるけど、使えないや

4:51 AM

@swift-5.7.3

protocol P {} struct S: P {} struct Builder<T> { var build: () -> T func callAsFunction() -> T { build() } } func f2_5() -> Builder<some P> { return Builder { S() } }

Iceman

@swift-5.7.3

protocol P {} struct S: P {} struct Builder<T> { var build: () -> T func callAsFunction() -> T { build() } } func f2_5() -> Builder<some P> { return Builder { S() } }

no output

これで我慢するか・・

関数返してその返り値がORTの場合、外から見たら順ジェネリクスになるんじゃないかしら？

順ジェネリクスとはつまりどういうことですか？

型を決定するのが外側からになる

4:55 AM

間違ってるかもしれん

引数ポジションだとそうだと思うんですが、返り値のポジジョンだと内側から決められると思うんですよね

4:56 AM

https://github.com/apple/swift-evolution/blob/main/proposals/0328-structural-opaque-result-types.md#higher-order-functions ここにそれっぽいことが書いてあります

返り値の返り値だから、そうか

4:56 AM

ひっくり返らないね

Motivationに

// we cannot return a lazily computed opaque result type func f2() -> () -> some P { /* ... */ }

がかいてあって、 Detailed Designに

For example, func f() -> () -> some P is valid, and func g() -> (some P) -> () produces an error:

が書いてあるので、できることになってるはずなんだよな

5:13 AM

https://github.com/apple/swift/pull/38392/files

5:14 AM

TODOｗ

TODOか〜〜い

5:16 AM

Status: Implementedだけどいいのかなあ　忘れられてそう

とりあえずレポート出すのが良いのでは

https://github.com/apple/swift/issues/60038

Bugs with opaque result types in structural position · Issue #60038...

Each of these three declarations should type check, but doesn't: protocol P { } extension P { func f1() -> () -> (some P) { return { self } // error: cannot convert value of t...

5:43 AM

https://github.com/apple/swift/pull/60044/files#diff-1bf37e99b23812898ce632708c9703e1affc012cc9a6b91c99e248b7e2b321fb

5:43 AM

5:44 AM

似たようなもっと難しいやつ直されてるな

5:44 AM

@swift-main protocol P {} extension P { func f() -> () -> some P { let fn = { self } return fn } } (edited)

omochimetaru

@swift-main protocol P {} extension P { func f() -> () -> some P { let fn = { self } return fn } } (edited)

no output (edited)

@swift-main protocol P {} struct S: P {} func f() -> () -> some P { let fn = { S() } return fn }

omochimetaru

@swift-main protocol P {} struct S: P {} func f() -> () -> some P { let fn = { S() } return fn }

no output

@swift-main protocol P {} struct S: P {} func f() -> () -> some P { return { S() } }

Iceman

@swift-main protocol P {} struct S: P {} func f() -> () -> some P { return { S() } }

exit status: 1 with stderr:<stdin>:4:12: error: cannot convert value of type 'S' to closure result type 'some P' return { S() } ^~~

一度変数に置く必要があったのか

5.7: できない main: ローカル変数を経由するとできる

5:47 AM

直接書く形式についてissue建てるのが良さそう

 // FIXME: This still doesn't work because the '() -> (some P)' propagates // backwards into the closure literal's return type /* public func f3() -> () -> (some P) { return { self } } */

(edited)

5:49 AM

FIXMEは書いてある

@swift-5.7.3 @swift-5.6.3 let aaa: [Int] = [1, 2, 3] for case .some(let v) in aaa { print(v) } (edited)

Iceman

@swift-5.7.3 @swift-5.6.3 let aaa: [Int] = [1, 2, 3] for case .some(let v) in aaa { print(v) } (edited)

exit status: 139 with stderr:

Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -new-driver-path /usr/bin/swift-driver -empty-abi-descriptor -resource-dir /usr/lib/swift -module-name main 1. Swift version 5.7.1 (swift-5.7.1-RELEASE) 2. Compiling with the current language version 3. While evaluating request ASTLoweringRequest(Lowering AST to SIL for module main) Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it): /usr/bin/swift-frontend(+0x551a083)[0x5616f5dd5083] /usr/bin/swift-frontend(+0x5517fae)[0x5616f5dd2fae] /usr/bin/swift-frontend(+0x551a40a)[0x5616f5dd540a] /lib/x86_64-linux-gnu/libc.so.6(+0x42520)[0x7fc688d3e520] /usr/bin/swift-frontend(+0x1bf67db)[0x5616f24b17db] /usr/bin/swift-frontend(+0xb6d1ac)[0x5616f14281ac] /usr/bin/swift-frontend(+0xb64271)[0x5616f141f271] /usr/bin/swift-frontend(+0xb64b0d)[0x5616f141fb0d] /usr/bin/swift-frontend(+0xae8807)[0x5616f13a3807] /usr/bin/swift-frontend(+0xb5daa7)[0x5616f1418aa7] /usr/bin/swift-frontend(+0xb27883)[0x5616f13e2883] /usr/bin/swift-frontend(+0xf8aabf)[0x5616f1845abf] /usr/bin/swift-frontend(+0x10171bc)[0x5616f18d21bc] /usr/bin/swift-frontend(+0xf9c989)[0x5616f1857989] /usr/bin/swift-frontend(+0xf9d296)[0x5616f1858296] /usr/bin/swift-frontend(+0x100f476)[0x5616f18ca476] /usr/bin/swift-frontend(+0x100f278)[0x5616f18ca278] /usr/bin/swift-frontend(+0xffce4f)[0x5616f18b7e4f] /usr/bin/swift-frontend(+0x10171f1)[0x5616f18d21f1] /usr/bin/swift-frontend(+0xffc1d8)[0x5616f18b71d8] /usr/bin/swift-frontend(+0xff7a1d)[0x5616f18b2a1d] /usr/bin/swift-frontend(+0xf795a5)[0x5616f18345a5] /usr/bin/swift-frontend(+0xf79fd3)[0x5616f1834fd3] /usr/bin/swift-frontend(+0xff758f)[0x5616f18b258f] /usr/bin/swift-frontend(+0xff74a9)[0x5616f18b24a9] /usr/bin/swift-frontend(+0xf7ce18)[0x5616f1837e18] /usr/bin/swift-frontend(+0xf7ac74)[0x5616f1835c74] /usr/bin/swift-frontend(+0xa41120)[0x561

(edited)

Iceman

@swift-5.7.3 @swift-5.6.3 let aaa: [Int] = [1, 2, 3] for case .some(let v) in aaa { print(v) } (edited)

exit status: 1 with stderr:<stdin>:2:26: error: type 'Int' has no member 'some' for case .some(let v) in aaa { ^~~

おお、5.7からか

そこにcase書けるんだ

forにもcaseとwhere書けるのたまに便利ですよ

オシャレ技

@swift-5.7.3 @swift-5.6.3 @swift-5.5.3

struct S { private var _x = [1, 2, 3] var x: [Int] { _read { yield _x } _modify { yield &_x } } } var s = S() s.x.append(4) debugPrint(s)

(edited)

kebo

@swift-5.7.3 @swift-5.6.3 @swift-5.5.3

struct S { private var _x = [1, 2, 3] var x: [Int] { _read { yield _x } _modify { yield &_x } } } var s = S() s.x.append(4) debugPrint(s)

(edited)

main.S(_x: [1, 2, 3, 4]) (edited)

kebo

@swift-5.7.3 @swift-5.6.3 @swift-5.5.3

struct S { private var _x = [1, 2, 3] var x: [Int] { _read { yield _x } _modify { yield &_x } } } var s = S() s.x.append(4) debugPrint(s)

(edited)

main.S(_x: [1, 2, 3, 4]) (edited)

kebo

@swift-5.7.3 @swift-5.6.3 @swift-5.5.3

struct S { private var _x = [1, 2, 3] var x: [Int] { _read { yield _x } _modify { yield &_x } } } var s = S() s.x.append(4) debugPrint(s)

(edited)

main.S(_x: [1, 2, 3, 4])

_read, _modify は結構前からありますね

そんな昔からあるんですね．ownership の文脈で登場した (つまり最近入った) のかと思ってました．

それで言うとownershipの文脈がかなり前からあるんですよ async/awaitの波の前、SwiftUI 1のResult Builder & KeyPath DML より前から

なるほど．確かに Manifesto は結構前でしたかも...

Swift 5.0でABI固定の時点でstdlibは modifyで書かれるようになった気がする

1

11:45 PM

大きな言語機能やAppleの都合が割り込むのを繰り返して、やっといろんな波が落ち着いてOwnershipに戻ってきた感じがしますｗ

@swift-main -frontend -dump-ast -enable-experimental-feature Macros print(#stringify(1 + 1)) (edited)

omochimetaru

@swift-main -frontend -dump-ast -enable-experimental-feature Macros print(#stringify(1 + 1)) (edited)

exit status: 1 with stdout:

(source_file "<stdin>" (top_level_code_decl range=[<stdin>:1:1 - line:1:24] (brace_stmt implicit range=[<stdin>:1:1 - line:1:24] (call_expr type='<null>' (overloaded_decl_ref_expr type='<null>' name=print number_of_decls=2 function_ref=single) (argument_list (argument (macro_expansion_expr type='<null>' name=stringify (argument_list (argument (binary_expr type='<null>' (overloaded_decl_ref_expr type='<null>' name=+ number_of_decls=35 function_ref=single) (argument_list implicit (argument (integer_literal_expr type='<null>' value=1 builtin_initializer=**NULL** initializer=**NULL**)) (argument (integer_literal_expr type='<null>' value=1 builtin_initializer=**NULL** initializer=**NULL**)))))))))))))

stderr:

<stdin>:1:1: error: failed to produce diagnostic for expression; please submit a bug report (https://swift.org/contributing/#reporting-bugs) print(#stringify(1 + 1)) ^

(edited)

macro_expansion_exprはあるね

ちょっと謎の落ち方してますねえ

@swift-5.0.3 @swift-main -frontend -dump-ast func foo() -> (Int...) -> Void { return { (a: Int...) in } } (edited)

omochimetaru

@swift-5.0.3 @swift-main -frontend -dump-ast func foo() -> (Int...) -> Void { return { (a: Int...) in } } (edited)

(source_file "<stdin>" (func_decl range=[<stdin>:1:1 - line:1:60] "foo()" interface type='() -> (Int...) -> Void' access=internal (parameter_list range=[<stdin>:1:9 - line:1:10]) (result (type_function (type_tuple (type_ident (component id='Int' bind=Swift.(file).Int))) (type_ident (component id='Void' bind=Swift.(file).Void)))) (brace_stmt range=[<stdin>:1:32 - line:1:60] (return_stmt range=[<stdin>:1:34 - line:1:58] (closure_expr type='(Int...) -> ()' location=<stdin>:1:41 range=[<stdin>:1:41 - line:1:58] discriminator=0 escaping (parameter_list (parameter "a" type='[Int]' interface type='[Int]' variadic) range=[<stdin>:1:43 - line:1:53]) (brace_stmt range=[<stdin>:1:41 - line:1:58]))))))

stderr: (edited)

omochimetaru

@swift-5.0.3 @swift-main -frontend -dump-ast func foo() -> (Int...) -> Void { return { (a: Int...) in } } (edited)

(source_file "<stdin>" (func_decl range=[<stdin>:1:1 - line:1:60] "foo()" interface type='() -> (Int...) -> Void' access=internal (parameter_list range=[<stdin>:1:9 - line:1:10]) (result (type_function (type_tuple (pack_expansion (type_ident (component id='Int' bind=Swift.(file).Int)))) (type_ident (component id='Void' bind=Swift.(file).Void)))) (brace_stmt range=[<stdin>:1:32 - line:1:60] (return_stmt range=[<stdin>:1:34 - line:1:58] (closure_expr type='(Int...) -> Void' location=<stdin>:1:41 range=[<stdin>:1:41 - line:1:58] discriminator=0 escaping (parameter_list range=[<stdin>:1:43 - line:1:53] (parameter "a" type='Int...' interface type='Int...' variadic)) (brace_stmt range=[<stdin>:1:41 - line:1:58]))))))

stderr: (edited)

PackExpansionTypeRepr は 2022年9月に実装されていて、最新版だと dump-astに pack_expansion が含まれて、これで表現されているけど、

10:58 PM

https://github.com/apple/swift/blob/swift-5.0-RELEASE/include/swift/AST/TypeRepr.h#L664

10:59 PM

それ以前では TupleTypeExpr が、hasEllipsis と getEllipsisIndex を持っていて、それで ... の情報を保持していた。

11:00 PM

関数の引数のうち、一つしか可変長引数を持てない事にシビアに依存した設計になっている。

11:03 PM

@swift-main

func foo(a: Int..., b: Bool, c: Int...) {} func foo() -> (Int..., Bool, Int...) -> Void { return { (a: Int..., b: Bool, c: Int...) in } }

omochimetaru

@swift-main

func foo(a: Int..., b: Bool, c: Int...) {} func foo() -> (Int..., Bool, Int...) -> Void { return { (a: Int..., b: Bool, c: Int...) in } }

exit status: 1 with stderr:

<stdin>:3:33: error: only a single element can be variadic func foo() -> (Int..., Bool, Int...) -> Void { ~~~ ^~~ <stdin>:4:26: error: no parameters may follow a variadic parameter in a closure return { (a: Int..., b: Bool, c: Int...) in } ^

おわーっ

11:04 PM

関数引数は複数の可変長引数を持てるけど、関数型定義は複数の可変長引数を書けない！

11:05 PM

@swift-main func foo(a: Int..., b: Bool, c: Int...) {} var a: ([Int], Bool, [Int]) = foo(a:b:c:)

omochimetaru

@swift-main func foo(a: Int..., b: Bool, c: Int...) {} var a: ([Int], Bool, [Int]) = foo(a:b:c:)

exit status: 1 with stderr:

<stdin>:2:31: error: cannot convert value of type '(Int..., Bool, Int...) -> ()' to specified type '([Int], Bool, [Int])' var a: ([Int], Bool, [Int]) = foo(a:b:c:) ^~~~~~~~~~~

マジか。代入時変換も無いじゃん。

11:06 PM

可変長引数を２つ以上持つ関数はSwiftの型システムでは一級オブジェクトとして扱えない・・・？

@swift-main func foo(a: Int..., b: Bool, c: Int...) {} var a: (Int..., Bool, Int...) -> Void = foo(a:b:c:) // ng print(type(of: a))

nanasi

@swift-main func foo(a: Int..., b: Bool, c: Int...) {} var a: (Int..., Bool, Int...) -> Void = foo(a:b:c:) // ng print(type(of: a))

exit status: 1 with stderr:

<stdin>:2:26: error: only a single element can be variadic var a: (Int..., Bool, Int...) -> Void = foo(a:b:c:) // ng ~~~ ^~~

@swift-main func foo(a: Int..., b: Bool, c: Int...) {} var a = foo(a:b:c:) // ok print(type(of: a))

nanasi

@swift-main func foo(a: Int..., b: Bool, c: Int...) {} var a = foo(a:b:c:) // ok print(type(of: a))

(Int..., Bool, Int...) -> ()

ウオーっ

ん〜〜〜？？？

@swift-main func foo(a: Int..., b: Bool, c: Int...) {} var a = foo(a:b:c:) a(1, false, 2) // ng

nanasi

@swift-main func foo(a: Int..., b: Bool, c: Int...) {} var a = foo(a:b:c:) a(1, false, 2) // ng

exit status: 1 with stderr:

<stdin>:3:4: error: missing argument for parameter #2 in call a(1, false, 2) // ng ^ , <#Bool#> <stdin>:2:5: note: 'a' declared here var a = foo(a:b:c:) ^ <stdin>:3:6: error: cannot convert value of type 'Bool' to expected argument type 'Int' a(1, false, 2) // ng ^

ユーザーは書けないけど推論器は書ける型だ！

2:03 AM

呼べねえｗｗｗ

@swift-main func foo(a: Int..., b: Bool, c: Int...) {} var a = foo(a:b:c:) a(a: 1, b: false, c: 2)

Iceman

@swift-main func foo(a: Int..., b: Bool, c: Int...) {} var a = foo(a:b:c:) a(a: 1, b: false, c: 2)

exit status: 1 with stderr:<stdin>:3:2: error: extraneous argument labels 'a:b:c:' in call a(a: 1, b: false, c: 2) ^~~~ ~~~ ~~~

呼べないｗｗ

関数型になった時にラベルは消失する

2:04 AM

ユーザーは書けないけど推論機は書けて、しかし呼び出すことができない関数型か・・・ (edited)

可変長引数周りは思った以上に不可解な振る舞いになっていますね

https://github.com/apple/swift-evolution/blob/main/proposals/0284-multiple-variadic-parameters.md

swift-evolution/0284-multiple-variadic-parameters.md at main · appl...

This maintains proposals for changes and user-visible enhancements to the Swift Programming Language. - swift-evolution/0284-multiple-variadic-parameters.md at main · apple/swift-evolution

2:09 AM

オーサーはオーウェンさんかあレビュースレッドも概ね好評だけど、使ってるの見たことないんだよな

2:09 AM

誰も使ってなさすぎて気づかれて無さそう

Vaporのルーティング記述はたしか可変長引数

でも可変長箇所は一個でしょ？ (edited)

確かに・・

2:13 AM

複数は見たこと無いかも

SE-0284でその制約が解除されたんだよね。

@swift-main var f: (Int..., Bool) -> Void = { a, b in print(a, b) } f(1, false) // ng

nanasi

@swift-main var f: (Int..., Bool) -> Void = { a, b in print(a, b) } f(1, false) // ng

exit status: 1 with stderr:

<stdin>:2:4: error: missing argument for parameter #2 in call f(1, false) // ng ^ , <#Bool#> <stdin>:1:5: note: 'f' declared here var f: (Int..., Bool) -> Void = { a, b in print(a, b) } ^ <stdin>:2:6: error: cannot convert value of type 'Bool' to expected argument type 'Int' f(1, false) // ng ^

！

2:16 AM

呼べないのは１個でもそうか。

@swift-main var f: (Bool, Int...) -> Void = { a, b in print(a, b) } f(false, 1, 2, 3) // ok

nanasi

@swift-main var f: (Bool, Int...) -> Void = { a, b in print(a, b) } f(false, 1, 2, 3) // ok

false [1, 2, 3]

え〜場所によって違うのか

草

1個でも場所によりけりみたいですね

その理屈だと、２個の場合は絶対呼び出せないですね

2:18 AM

１個の場合は固定長が先行すればいいけど。

2:19 AM

知ってる限り、タイプチェックの前にラベルマッチングがあるので、確かに無理だなあ

@swift-main func f(a: Int, b: String..., c: String...) { print("b", b, "c", c) } let a = f(a:b:c:) a(1, "", "", "") (edited)

Iceman

@swift-main func f(a: Int, b: String..., c: String...) { print("b", b, "c", c) } let a = f(a:b:c:) a(1, "", "", "") (edited)

b ["", "", ""] c [] (edited)

可変長引数部分が同じ型で末尾にまとまってるなら呼べるけど、その場合最初の部分にすべてが詰まるっぽい？

1

Iceman

可変長引数部分が同じ型で末尾にまとまってるなら呼べるけど、その場合最初の部分にすべてが詰まるっぽい？

そっか、ゼロ個にすればいいから呼べるのか

2:22 AM

https://github.com/apple/swift/issues/62212

Can't write function type having multiple variadic parameters. · Is...

Description We cant't write function type having multiple variadic parameters. func singleVariadic(a: Int..., b: Bool) {} let sv: (Int..., Bool) -> Void = singleVariadic(a

) func d...

2:22 AM

↑とりあえず、型が書けない事は報告してみました

2

Slava先生からコメント付いたけど、どうせ呼び出せないから問題無くてバグではない、とのことだって。

Heroku Free停止を明々後日に控え、ようやくRenderでbotを動かすテストを開始 @swift-4.0.3 @swift-4.1.3 @swift-4.2.4 -version

norio_nomura

Heroku Free停止を明々後日に控え、ようやくRenderでbotを動かすテストを開始 @swift-4.0.3 @swift-4.1.3 @swift-4.2.4 -version

Swift version 4.1.3 (swift-4.1.3-RELEASE) Target: x86_64-unknown-linux-gnu

norio_nomura

Heroku Free停止を明々後日に控え、ようやくRenderでbotを動かすテストを開始 @swift-4.0.3 @swift-4.1.3 @swift-4.2.4 -version

Swift version 4.0.3 (swift-4.0.3-RELEASE) Target: x86_64-unknown-linux-gnu

norio_nomura

Heroku Free停止を明々後日に控え、ようやくRenderでbotを動かすテストを開始 @swift-4.0.3 @swift-4.1.3 @swift-4.2.4 -version

Swift version 4.2.4 (swift-4.2.4-RELEASE) Target: x86_64-unknown-linux-gnu

とりあえずボット全部をRenderへ移した。 @swift-4.0.3@swift-4.1.3 @swift-4.2.4 @swift-5.0.3 @swift-5.1.5 @swift-5.2.5 @swift-5.3.3 @swift-5.4.3 @swift-5.5.3 @swift-5.6.3 @swift-5.7.3 @swift-main -version

norio_nomura

とりあえずボット全部をRenderへ移した。 @swift-4.0.3@swift-4.1.3 @swift-4.2.4 @swift-5.0.3 @swift-5.1.5 @swift-5.2.5 @swift-5.3.3 @swift-5.4.3 @swift-5.5.3 @swift-5.6.3 @swift-5.7.3 @swift-main -version

Swift version 5.1.5 (swift-5.1.5-RELEASE) Target: x86_64-unknown-linux-gnu

norio_nomura

とりあえずボット全部をRenderへ移した。 @swift-4.0.3@swift-4.1.3 @swift-4.2.4 @swift-5.0.3 @swift-5.1.5 @swift-5.2.5 @swift-5.3.3 @swift-5.4.3 @swift-5.5.3 @swift-5.6.3 @swift-5.7.3 @swift-main -version

Swift version 4.1.3 (swift-4.1.3-RELEASE) Target: x86_64-unknown-linux-gnu

norio_nomura

とりあえずボット全部をRenderへ移した。 @swift-4.0.3@swift-4.1.3 @swift-4.2.4 @swift-5.0.3 @swift-5.1.5 @swift-5.2.5 @swift-5.3.3 @swift-5.4.3 @swift-5.5.3 @swift-5.6.3 @swift-5.7.3 @swift-main -version

Swift version 4.2.4 (swift-4.2.4-RELEASE) Target: x86_64-unknown-linux-gnu

norio_nomura

とりあえずボット全部をRenderへ移した。 @swift-4.0.3@swift-4.1.3 @swift-4.2.4 @swift-5.0.3 @swift-5.1.5 @swift-5.2.5 @swift-5.3.3 @swift-5.4.3 @swift-5.5.3 @swift-5.6.3 @swift-5.7.3 @swift-main -version

Swift version 5.2.5 (swift-5.2.5-RELEASE) Target: x86_64-unknown-linux-gnu

norio_nomura

とりあえずボット全部をRenderへ移した。 @swift-4.0.3@swift-4.1.3 @swift-4.2.4 @swift-5.0.3 @swift-5.1.5 @swift-5.2.5 @swift-5.3.3 @swift-5.4.3 @swift-5.5.3 @swift-5.6.3 @swift-5.7.3 @swift-main -version

Swift version 4.0.3 (swift-4.0.3-RELEASE) Target: x86_64-unknown-linux-gnu

norio_nomura

とりあえずボット全部をRenderへ移した。 @swift-4.0.3@swift-4.1.3 @swift-4.2.4 @swift-5.0.3 @swift-5.1.5 @swift-5.2.5 @swift-5.3.3 @swift-5.4.3 @swift-5.5.3 @swift-5.6.3 @swift-5.7.3 @swift-main -version

Swift version 5.4.3 (swift-5.4.3-RELEASE) Target: x86_64-unknown-linux-gnu

norio_nomura

とりあえずボット全部をRenderへ移した。 @swift-4.0.3@swift-4.1.3 @swift-4.2.4 @swift-5.0.3 @swift-5.1.5 @swift-5.2.5 @swift-5.3.3 @swift-5.4.3 @swift-5.5.3 @swift-5.6.3 @swift-5.7.3 @swift-main -version

Swift version 5.3.3 (swift-5.3.3-RELEASE) Target: x86_64-unknown-linux-gnu

norio_nomura

とりあえずボット全部をRenderへ移した。 @swift-4.0.3@swift-4.1.3 @swift-4.2.4 @swift-5.0.3 @swift-5.1.5 @swift-5.2.5 @swift-5.3.3 @swift-5.4.3 @swift-5.5.3 @swift-5.6.3 @swift-5.7.3 @swift-main -version

Swift version 5.6.3 (swift-5.6.3-RELEASE) Target: x86_64-unknown-linux-gnu

norio_nomura

とりあえずボット全部をRenderへ移した。 @swift-4.0.3@swift-4.1.3 @swift-4.2.4 @swift-5.0.3 @swift-5.1.5 @swift-5.2.5 @swift-5.3.3 @swift-5.4.3 @swift-5.5.3 @swift-5.6.3 @swift-5.7.3 @swift-main -version

Swift version 5.5.3 (swift-5.5.3-RELEASE) Target: x86_64-unknown-linux-gnu

norio_nomura

とりあえずボット全部をRenderへ移した。 @swift-4.0.3@swift-4.1.3 @swift-4.2.4 @swift-5.0.3 @swift-5.1.5 @swift-5.2.5 @swift-5.3.3 @swift-5.4.3 @swift-5.5.3 @swift-5.6.3 @swift-5.7.3 @swift-main -version

Swift version 5.8-dev (LLVM ec11c492d2fb63b, Swift 1f3e159cfe518fb) Target: x86_64-unknown-linux-gnu

norio_nomura

とりあえずボット全部をRenderへ移した。 @swift-4.0.3@swift-4.1.3 @swift-4.2.4 @swift-5.0.3 @swift-5.1.5 @swift-5.2.5 @swift-5.3.3 @swift-5.4.3 @swift-5.5.3 @swift-5.6.3 @swift-5.7.3 @swift-main -version

Swift version 5.7.1 (swift-5.7.1-RELEASE) Target: x86_64-unknown-linux-gnu

一定時間でスリープするRenderのWeb Serverインスタンスなので、定期的にアクセスして起こしてます。

1

1:59 AM

スリープ中のメンションに反応する様には出来ていないので、オンライン状況を確認して使ってください。

いつもありがとうございます。

1

norio_nomura

一定時間でスリープするRenderのWeb Serverインスタンスなので、定期的にアクセスして起こしてます。

この手法はかなり問題が多く、

定期的なアクセスが結構な頻度でRenderにブロックされる
各インスタンスが定期アクセス間隔よりも早くスリープする

という理由で、botの稼働率はかなり低くなっています。

2:31 AM

Heroku Freeが止まって全く使えなくなるよりはマシ？という状態です。

@swift-5.3.3 @swift-5.7.3

import Foundation extension NSLock { func synchronized<T>(_ closure: () throws -> T) rethrows -> T { self.lock() defer { self.unlock() } return try closure() } } func test() throws { let task = Process() task.executableURL = URL(fileURLWithPath: "/usr/bin/which") task.arguments = [] let stdoutPipe = Pipe() let dataLock = NSLock() task.standardOutput = stdoutPipe var stdoutData = Data() stdoutPipe.fileHandleForReading.readabilityHandler = { fh in dataLock.synchronized { stdoutData.append(Data()) } } try task.run() task.waitUntilExit() stdoutPipe.fileHandleForReading.readabilityHandler = nil try dataLock.synchronized { if let d = try stdoutPipe.fileHandleForReading.readToEnd() { stdoutData.append(d) } } } for _ in 0..<100 { DispatchQueue.global().async { try! test() } }

(edited)

Iceman

@swift-5.3.3 @swift-5.7.3

import Foundation extension NSLock { func synchronized<T>(_ closure: () throws -> T) rethrows -> T { self.lock() defer { self.unlock() } return try closure() } } func test() throws { let task = Process() task.executableURL = URL(fileURLWithPath: "/usr/bin/which") task.arguments = [] let stdoutPipe = Pipe() let dataLock = NSLock() task.standardOutput = stdoutPipe var stdoutData = Data() stdoutPipe.fileHandleForReading.readabilityHandler = { fh in dataLock.synchronized { stdoutData.append(Data()) } } try task.run() task.waitUntilExit() stdoutPipe.fileHandleForReading.readabilityHandler = nil try dataLock.synchronized { if let d = try stdoutPipe.fileHandleForReading.readToEnd() { stdoutData.append(d) } } } for _ in 0..<100 { DispatchQueue.global().async { try! test() } }

(edited)

no output (edited)

Iceman

@swift-5.3.3 @swift-5.7.3

import Foundation extension NSLock { func synchronized<T>(_ closure: () throws -> T) rethrows -> T { self.lock() defer { self.unlock() } return try closure() } } func test() throws { let task = Process() task.executableURL = URL(fileURLWithPath: "/usr/bin/which") task.arguments = [] let stdoutPipe = Pipe() let dataLock = NSLock() task.standardOutput = stdoutPipe var stdoutData = Data() stdoutPipe.fileHandleForReading.readabilityHandler = { fh in dataLock.synchronized { stdoutData.append(Data()) } } try task.run() task.waitUntilExit() stdoutPipe.fileHandleForReading.readabilityHandler = nil try dataLock.synchronized { if let d = try stdoutPipe.fileHandleForReading.readToEnd() { stdoutData.append(d) } } } for _ in 0..<100 { DispatchQueue.global().async { try! test() } }

(edited)

no output (edited)

norio_nomura

この手法はかなり問題が多く、

定期的なアクセスが結構な頻度でRenderにブロックされる
各インスタンスが定期アクセス間隔よりも早くスリープする

という理由で、botの稼働率はかなり低くなっています。

昨日から、RenderがボットのWeb Serverインスタンスへの定期アクセスを完全にブロックするようになったために、ボット達はずっとスリープしたままです。

1

https://replit.com とかどうですかね？$7/moで 20 台くらい always on らしい (always とはいえ一日数回数分〜数十分お休みするっぽいですが)

Replit: the collaborative browser based IDE

Run code live in your browser. Write and run code in 50+ languages online with Replit, a powerful IDE, compiler, & interpreter.

SwiftFiddleのAPIは自由に使ってくれていいですよ。

curl -X POST "https://swiftfiddle.com/runner/5.7/run" \ -H "Content-Type:application/json" \ --data '{"code": "import Foundation\nprint(\"Hello World\")"}'

あとBotのホスティング１台で済むのなら私が使ってるDigitalOceanのサーバのリソースを余らせてるのでそこにデプロイしますよ。

ありがとうございます。とりあえず、どこかの有料サービスを使うにしても、きしかわさんの余剰リソースを当てにするにしても、botそれぞれに常時起動インスタンスが必要な現状の構成は適していないので、それをどうにかする必要があります。

Swiftバージョンごとにユーザーがいるのは革命的に便利ですけどそこ無くしてもいいかもしれませんね。ただSwift BotくらいのアクセスならDigitalOceanのサーバで複数イメージを実行しても問題ないんじゃないかな。

小手先の対応では再稼働できなさそうなので、最初にbotを作った時には無かったDiscordのSlash command辺りの現状を把握したりしてから、構成を見直します。

ヘルスチェックがブロックされるっていうのも気になりますね。私はbetteruptimeでチェックしてますけど問題は起こってないです。 https://betteruptime.com/

Better Uptime

Radically better uptime monitoring platform with phone call alerts, status pages, and incident management built-in. Free plan included!

それ使ってみます。

とりあえず一通りBetter Uptimeに登録してみたけど、いくつかはすぐダウンになってしまった。

なんでしょうね。

そのときステータスコードは何が返ってくるんですか？

何も返ってきません

ヘルスチェックのエンドポイントは単なるGETで200返すみたいな実装ですか？

そうです。

謎ですねえ。直接 xxx.onrender.com のようなURLにアクセスしてるんですか？

そうです。

https://community.render.com/t/my-app-url-is-loading-infinitely/7555/6 Renderが調子悪いんじゃないかという話を見ました。

My app URL is loading infinitely

Having the same issue. Hopefully Render will fix it themselves. I have a Python 3 app, which I migrated from Heroku, and it has been working fine for the past few weeks. It started not responding a few hours ago. Gets temporarily fixed on redeployment, but then goes back down.

なるほど、確かにRegionがOregonになってる。

全部Ohioへ移した。

お、それで直りました？

直りました。

1

swift40,swift41のインスタンスも作ってみたけど、Better Uptimeの無料枠が10ホストまでなので、常時オンラインはmain〜swift42までの10個。

ヘルスチェックのサービスはたくさんあるので複数のサービスを使うという手はありますね。どこで何を監視してるかわからなくなるので私はやらないけど

Regionごとに不具合が起きたりするのなら、複数Regionへ分散した方がよかったかな

@swift-5.8.1 -version

norio_nomura

@swift-5.8.1 -version

Swift version 5.8-dev (LLVM 0e21831b79c13d9, Swift 87b9e5758b1c75f) Target: x86_64-unknown-linux-gnu

1

@swift-5.7.3 @swift-5.8.1

protocol P1<C> { associatedtype C } protocol P2<C> { associatedtype C func f() -> any P1<C> } func g(_ p: any P2) { let _ = p.f() }

(edited)

Iceman

@swift-5.7.3 @swift-5.8.1

protocol P1<C> { associatedtype C } protocol P2<C> { associatedtype C func f() -> any P1<C> } func g(_ p: any P2) { let _ = p.f() }

(edited)

exit status: 139 with stderr:

Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -new-driver-path /usr/bin/swift-driver -empty-abi-descriptor -resource-dir /usr/lib/swift -module-name main 1. Swift version 5.7.2 (swift-5.7.2-RELEASE) 2. Compiling with the current language version 3. While evaluating request TypeCheckSourceFileRequest(source_file "<stdin>") 4. While evaluating request TypeCheckFunctionBodyRequest(main.(file).g@<stdin>:10:6) 5. While type-checking statement at [<stdin>:10:21 - line:12:1] RangeText="{ let _ = p.f() " 6. While type-checking declaration 0x560c45448848 (at <stdin>:11:5) 7. While evaluating request PatternBindingEntryRequest((unknown decl), 0, 0) 8. While type-checking expression at [<stdin>:11:13 - line:11:17] RangeText="p.f(" 9. While type-checking-target starting at <stdin>:11:15 Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it): /usr/bin/swift-frontend(+0x551a103)[0x560c41ab1103] /usr/bin/swift-frontend(+0x551802e)[0x560c41aaf02e] /usr/bin/swift-frontend(+0x551a48a)[0x560c41ab148a] /lib/x86_64-linux-gnu/libc.so.6(+0x42520)[0x7fc37a23d520] /usr/bin/swift-frontend(+0x16fbd24)[0x560c3dc92d24] /usr/bin/swift-frontend(+0x17205b8)[0x560c3dcb75b8] /usr/bin/swift-frontend(+0x16fbb8b)[0x560c3dc92b8b] /usr/bin/swift-frontend(+0x16fa3b7)[0x560c3dc913b7] /usr/bin/swift-frontend(+0x171e6bf)[0x560c3dcb56bf] /usr/bin/swift-frontend(+0x16f9375)[0x560c3dc90375] /usr/bin/swift-frontend(+0x16f83a1)[0x560c3dc8f3a1] /usr/bin/swift-frontend(+0x15f8b31)[0x560c3db8fb31] /usr/bin/swift-frontend(+0x15f88a4)[0x560c3db8f8a4] /usr/bin/swift-frontend(+0x15f9e08)[0x560c3db90e08] /usr/bin/swift-frontend(+0x15f9ff7)[0x560c3db90ff7] /usr/bin/swift-frontend(+0x16b46a1)[0x560c3dc4b6a1] /usr/bin/swift-frontend(+0x1617d12)[0x560c3dbaed12] /usr/bin/swift-frontend(+0x160a727)[0x560c3dba1727] /usr/bin/swift-frontend(+0x162

(edited)

Iceman

@swift-5.7.3 @swift-5.8.1

protocol P1<C> { associatedtype C } protocol P2<C> { associatedtype C func f() -> any P1<C> } func g(_ p: any P2) { let _ = p.f() }

(edited)

exit status: 134 with stderr:

Unhandled coercion: (existential_type (protocol_composition_type)) (opened_archetype_type address=0xad7f7b8 (interface_type=dependent_member_type assoc_type=main.(file).P2.C@<stdin>:6:20 (base=generic_type_param_type depth=0 index=0)) (opened_existential=existential_type (protocol_type decl=main.(file).P2@<stdin>:5:10)) opened_existential_id=95EB1234-89D8-11ED-8FD6-4280E2F077D9) Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -new-driver-path /usr/bin/swift-driver -empty-abi-descriptor -resource-dir /usr/lib/swift -module-name main 1. Swift version 5.8-dev (LLVM 0e21831b79c13d9, Swift a2934c0a847db7a) 2. Compiling with the current language version 3. While evaluating request TypeCheckSourceFileRequest(source_file "<stdin>") 4. While evaluating request TypeCheckFunctionBodyRequest(main.(file).g@<stdin>:10:6) 5. While type-checking statement at [<stdin>:10:21 - line:12:1] RangeText="{ let _ = p.f() " 6. While type-checking declaration 0xad5d230 (at <stdin>:11:5) 7. While evaluating request PatternBindingEntryRequest((unknown decl), 0, 0) 8. While type-checking expression at [<stdin>:11:13 - line:11:17] RangeText="p.f(" 9. While type-checking-target starting at <stdin>:11:15 Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it): /usr/bin/swift-frontend[0x6543683] /usr/bin/swift-frontend[0x65413be] /usr/bin/swift-frontend[0x6543a0f] /lib/x86_64-linux-gnu/libpthread.so.0(+0x14420)[0x7fa21cd94420] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0xcb)[0x7fa21c20500b] /lib/x86_64-linux-gnu/libc.so.6(abort+0x12b)[0x7fa21c1e4859] /usr/bin/swift-frontend[0x1ada7cb] /usr/bin/swift-frontend[0x1af9f69] /usr/bin/swift-frontend[0x1afc38d] /usr/bin/swift-frontend[0x1ada046] /usr/bin/swift-frontend[0x1ad646a] /usr/bin/swift-frontend[0x1ad523e] /usr/bin/swift-frontend[0x1ad3532] /usr/bin/swift-fro

@swift-main -O fatalError("llvm-symbolizer入れました")

norio_nomura

@swift-main -O fatalError("llvm-symbolizer入れました")

exit status: 132 with stderr:

main/<stdin>:1: Fatal error: llvm-symbolizer入れました Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -O -new-driver-path /usr/bin/swift-driver -empty-abi-descriptor -resource-dir /usr/lib/swift -module-name main 1. Swift version 5.8-dev (LLVM ab856b0fa3177ee, Swift 71c62c04ace2b5b) 2. Compiling with the current language version 3. While running user code "<stdin>" #0 0x00005634ff32ac63 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/usr/bin/swift-frontend+0x6989c63) #1 0x00005634ff328a3e llvm::sys::RunSignalHandlers() (/usr/bin/swift-frontend+0x6987a3e) #2 0x00005634ff32afea SignalHandler(int) Signals.cpp:0:0 #3 0x00007fbdae785520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520) #4 0x00007fbdaee57558 $ss17_assertionFailure__4file4line5flagss5NeverOs12StaticStringV_SSAHSus6UInt32VtF (/usr/lib/swift/linux/libswiftCore.so+0x15e558) #5 0x00007fbdaecf8077 #6 0x00005634f98382fd llvm::orc::runAsMain(int (*)(int, char**), llvm::ArrayRef<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, llvm::Optional<llvm::StringRef>) (/usr/bin/swift-frontend+0xe972fd) #7 0x00005634f96de3d8 swift::RunImmediately(swift::CompilerInstance&, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&, swift::IRGenOptions const&, swift::SILOptions const&, std::unique_ptr<swift::SILModule, std::default_delete<swift::SILModule> >&&) (/usr/bin/swift-frontend+0xd3d3d8) #8 0x00005634f9698b30 processCommandLineAndRunImmediately(swift::CompilerInstance&, std::unique_ptr<swift::SILModule, std::default_delete<swift::SILModule> >&&, llvm::PointerUnion<swift::ModuleDecl*, swift::SourceFile*>, swift::FrontendObserver*, int&) FrontendTool.cpp:0:0 #9 0x00005634f969445b performCompileStepsPostSILGen(swift::CompilerInstance&, std::unique_ptr<swif

おおー！

norio_nomura

@swift-main -O fatalError("llvm-symbolizer入れました")

これにより、クラッシュ時のスタックトレースにシンボルが出やすくなったはず。

1

@swift-5.8.1 fatalError("出力を添付ファイルとしてアップロードするテスト")

norio_nomura

@swift-5.8.1 fatalError("出力を添付ファイルとしてアップロードするテスト")

exit status: 132 with

stderr.log

4.46 KB

iOS版でプレビュー出ないのか。 (edited)

.logファイルはiOSだと開くの億劫ですね

3:08 PM

正しいけど…

3:08 PM

一応Safariで開いてdlせずに表示は出来る

拡張子が変われば、iOSでも開きやすかったりするのかな？

どうでしょう、試しにアップロードしてみよう

3:12 PM

stderr.txt

4.46 KB

何に変えても、デフォルトはメモアプリっぽい。

変わらないですねw

3:12 PM

リンク踏んでSafariが開く

3:13 PM

でも、デスクトップ版からはみやすくなりますね

そう。

content type指定で変わりませんっけ

あー

今何になってるか分からないけど

3:14 PM

octetstreamになってるとDLになったりする

3:16 PM

text/plainになってたけど、content-dispositionがついてるからDLになってるのかも？

今はcontent type指定してないですね。クライアントからのアップロードでも指定されてないのかな？

3:20 PM

クライアントからのアップロードは、公開されているAPIを使っていないみたいだ。

content_typeの指定はできてもcontent dispositionを消すみたいな操作はできなさそうですね

swift58だけこのままにして、続きは明日にします。

とりあえず戻した。

Render Web環境のdeployは、zero downtime deploy関係でdeploy直後には新バージョンインスタンスが2つ+前バージョンインスタンス1つが存在するのと、ログではインスタンス起動まで進んでるのにdeploy失敗するのが合わさって、botを動かすにはとても使いづらい。 (edited)

@swift-5.8.1

fatalError("出力が20行以上もしくは2000文字以上になったら、出力の先頭3行を本文へ切り出し、全文をファイルとしてアップロードする")

(edited)

norio_nomura

@swift-5.8.1

fatalError("出力が20行以上もしくは2000文字以上になったら、出力の先頭3行を本文へ切り出し、全文をファイルとしてアップロードする")

(edited)

exit status: 132 with

main/<stdin>:1: Fatal error: 出力が20行以上もしくは2000文字以上になったら、出力の先頭3行を本文へ切り出し、全文をファイルとしてアップロードする Current stack trace: 0 libswiftCore.so 0x00007f48f5378460 _swift_stdlib_reportFatalErrorInFile + 112

(edited)

stderr.log

4.55 KB

.swift拡張子をもつ添付ファイルを実行カレントディレクトリに生成されたファイルをアップロード @swift-5.8.1

getServerIcon.swift

453 bytes

norio_nomura

.swift拡張子をもつ添付ファイルを実行カレントディレクトリに生成されたファイルをアップロード @swift-5.8.1

no output

おもしろ！

swift58はしばらくこの状態にします。

ファイルアップロード関連の機能追加はこれくらいかな。

botへのメッセージが別メッセージへのリプライだった場合、そこからbotへの入力を取り出せると面白い？ (edited)

@swift-5.7.3 -stats-output-dir . -trace-stats-events print("Hello world!") (edited)

norio_nomura

@swift-5.7.3 -stats-output-dir . -trace-stats-events print("Hello world!") (edited)

Hello world! (edited)

stats-1674718970007665-swift-frontend-main-all-x86_64_unknown_linux_gnu--Onone-1836796438.json

22.94 KB

trace-1674718970007703-swift-frontend-main-all-x86_64_unknown_linux_gnu--Onone-1834995769.csv

88.13 KB

全てのbotをファイルアップロード対応版に更新した。

@swift-main @swift-5.8.1 @swift-5.7.3 protocol P<A> { associatedtype A } struct S: P<String> {} func f<T: P<String>>(_ a: T) {}

Iceman

@swift-main @swift-5.8.1 @swift-5.7.3 protocol P<A> { associatedtype A } struct S: P<String> {} func f<T: P<String>>(_ a: T) {}

exit status: 1 with

<stdin>:4:8: error: cannot inherit from protocol type with generic argument 'P<String>' struct S: P<String> {} ^ <stdin>:4:8: error: type 'S' does not conform to protocol 'P' struct S: P<String> {} ^ <stdin>:2:18: note: protocol requires nested type 'A'; do you want to add it? associatedtype A ^

Iceman

@swift-main @swift-5.8.1 @swift-5.7.3 protocol P<A> { associatedtype A } struct S: P<String> {} func f<T: P<String>>(_ a: T) {}

exit status: 1 with

<stdin>:4:8: error: cannot inherit from protocol type with generic argument 'P<String>' struct S: P<String> {} ^ <stdin>:4:8: error: type 'S' does not conform to protocol 'P' struct S: P<String> {} ^ <stdin>:2:18: note: protocol requires nested type 'A'; do you want to add it? associatedtype A ^

Iceman

@swift-main @swift-5.8.1 @swift-5.7.3 protocol P<A> { associatedtype A } struct S: P<String> {} func f<T: P<String>>(_ a: T) {}

exit status: 1 with

<stdin>:4:8: error: cannot inherit from protocol type with generic argument 'P<String>' struct S: P<String> {} ^ <stdin>:4:8: error: type 'S' does not conform to protocol 'P' struct S: P<String> {} ^ <stdin>:2:18: note: protocol requires nested type 'A'; do you want to add it? associatedtype A ^

@swift-5.8.1 @swift-5.7.3 @swift-main

protocol P { func p() } struct Box<T> { var value: T } func f() -> Box<some P> { struct S: P { func p() { print("S in f()") } } return Box(value: S()) } let result = f() result.value.p()

(edited)

Iceman

@swift-5.8.1 @swift-5.7.3 @swift-main

protocol P { func p() } struct Box<T> { var value: T } func f() -> Box<some P> { struct S: P { func p() { print("S in f()") } } return Box(value: S()) } let result = f() result.value.p()

(edited)

S in f() (edited)

1

Iceman

@swift-5.8.1 @swift-5.7.3 @swift-main

protocol P { func p() } struct Box<T> { var value: T } func f() -> Box<some P> { struct S: P { func p() { print("S in f()") } } return Box(value: S()) } let result = f() result.value.p()

(edited)

exit status: 139 with

Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -new-driver-path /usr/bin/swift-driver -empty-abi-descriptor -resource-dir /usr/lib/swift -module-name main 1. Swift version 5.7.3 (swift-5.7.3-RELEASE)

(edited)

stderr.log

40.17 KB

Iceman

@swift-5.8.1 @swift-5.7.3 @swift-main

protocol P { func p() } struct Box<T> { var value: T } func f() -> Box<some P> { struct S: P { func p() { print("S in f()") } } return Box(value: S()) } let result = f() result.value.p()

(edited)

exit status: 139 with

Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -new-driver-path /usr/bin/swift-driver -empty-abi-descriptor -resource-dir /usr/lib/swift -module-name main 1. Swift version 5.8-dev (LLVM 44d4f9d4b49845f, Swift b9562e1a860ec0b)

stderr.log

38.5 KB

ん？これはコンパイラがクラッシュしてるのかな

10:35 AM

LinuxおよびmacOSの5.7では実行時にセグフォで落ちることを期待したのだけど、なんかちょっと違う気がする

exit status 139はtimeoutがSIGSEGVを捕捉した場合(128+11)かな？ (edited)

12:47 PM

https://www.gnu.org/software/coreutils/timeout

timeout invocation (GNU Coreutils 9.1)

12:52 PM

swiftの実行はenvとtimeoutを挟んでこんな感じ。 /usr/bin/env -i PATH\=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin timeout --signal\=KILL 30 swift -

statusの数字でかいのそういうことだったんですね

@swift-5.9.2 -version

norio_nomura

@swift-5.9.2 -version

Swift version 5.9-dev (LLVM a34ab3cb279018d, Swift 7abb1e5f91476e2) Target: x86_64-unknown-linux-gnu

@swift-5.8.1 -version

norio_nomura

@swift-5.8.1 -version

Swift version 5.8 (swift-5.8-RELEASE) Target: x86_64-unknown-linux-gnu

@swift-5.8.1 func p(to output: inout TextOutputStream) { print("", to: &output) }

Kishikawa Katsumi

@swift-5.8.1 func p(to output: inout TextOutputStream) { print("", to: &output) }

no output

@swift-5.8.1 @swift-5.7.3 import Foundation let url = URL(fileURLWithPath: "/tmp") print(url.appendingPathComponent("")) (edited)

t.ae

@swift-5.8.1 @swift-5.7.3 import Foundation let url = URL(fileURLWithPath: "/tmp") print(url.appendingPathComponent("")) (edited)

file:///tmp// (edited)

t.ae

@swift-5.8.1 @swift-5.7.3 import Foundation let url = URL(fileURLWithPath: "/tmp") print(url.appendingPathComponent("")) (edited)

file:///tmp// (edited)

@swift-5.9.2

import _Observation public final class MyObject: Observable { public var someProperty: String = "AAAA" public var someOtherProperty: Int = 0 let observationRegistrar = ObservationRegistrar<MyObject>() public func changes<Isolation>(for properties: TrackedProperties<MyObject>, isolatedTo isolation: Isolation) -> ObservedChanges<MyObject, Isolation> where Isolation : Actor { observationRegistrar.changes(for: properties, isolatedTo: isolation) } public func values<Member>(for keyPath: KeyPath<MyObject, Member>) -> ObservedValues<MyObject, Member> where Member : Sendable { observationRegistrar.values(for: keyPath) } }

shiz

@swift-5.9.2

import _Observation public final class MyObject: Observable { public var someProperty: String = "AAAA" public var someOtherProperty: Int = 0 let observationRegistrar = ObservationRegistrar<MyObject>() public func changes<Isolation>(for properties: TrackedProperties<MyObject>, isolatedTo isolation: Isolation) -> ObservedChanges<MyObject, Isolation> where Isolation : Actor { observationRegistrar.changes(for: properties, isolatedTo: isolation) } public func values<Member>(for keyPath: KeyPath<MyObject, Member>) -> ObservedValues<MyObject, Member> where Member : Sendable { observationRegistrar.values(for: keyPath) } }

no output

@swift-5.9.2 -enable-experimental-feature Macros

import _Observation @Observable final class ChangesExample { @MainActor var someField: Int = 0 @MainActor var someOtherField: String = "" }

shiz

@swift-5.9.2 -enable-experimental-feature Macros

import _Observation @Observable final class ChangesExample { @MainActor var someField: Int = 0 @MainActor var someOtherField: String = "" }

exit status: 1 with <stdin>:3:1: error: unknown attribute 'Observable' @Observable final class ChangesExample { ^

@swift-5.1.5 var output: TextOutputStream = "" print("", to: &output)

Kishikawa Katsumi

@swift-5.1.5 var output: TextOutputStream = "" print("", to: &output)

exit status: 1 with

<stdin>:2:1: error: protocol type 'TextOutputStream' cannot conform to 'TextOutputStream' because only concrete types can conform to protocols print("", to: &output) ^

ScrollView { Image("hoge") .resizable() .scaledToFit() } ScrollView(.init()) { Image("hoge") .resizable() .scaledToFit() }

上と下でImageの表示に差がでるのは何故でしょうか？下は理想の表示になるのに対して、上だとScrollViewいっぱい？に大きく表示されてしまいます。

initの宣言を見るとわかりますが、ScrollViewのinitの第一引数はAxis.Setを取り、デフォルト引数として.verticalが与えられています。 Setなので.init()だと空になりますので、与えるパラメータが異なり動きも変わるはずです。

1

@swift-5.8.1

class Box<T> { private var value: T init(_ value: T) { self.value = value } func mutate(_ mutation: (inout T) -> Void) { mutation(&self.value) } } func f() { let box = Box { } let s = "meow" box.mutate { value in value = { s } } } f()

(edited)

niw

@swift-5.8.1

class Box<T> { private var value: T init(_ value: T) { self.value = value } func mutate(_ mutation: (inout T) -> Void) { mutation(&self.value) } } func f() { let box = Box { } let s = "meow" box.mutate { value in value = { s } } } f()

(edited)

exit status: 139 with <stdin>:22:13: warning: expression of type 'String' is unused s ^ (edited)

stderr.log

3.29 KB

@swift-5.8.1

class Box<T> { private var value: T init(_ value: T) { self.value = value } func mutate(_ mutation: (inout T) -> Void) { mutation(&self.value) } } func f() { let box = Box { } let s = "meow" box.mutate { value in value = { s } } } f()

niw

@swift-5.8.1

class Box<T> { private var value: T init(_ value: T) { self.value = value } func mutate(_ mutation: (inout T) -> Void) { mutation(&self.value) } } func f() { let box = Box { } let s = "meow" box.mutate { value in value = { s } } } f()

<stdin>:22:13: warning: expression of type 'String' is unused s ^

@swift-5.9.2

class Box<T> { private var value: T init(_ value: T) { self.value = value } func mutate(_ mutation: (inout T) -> Void) { mutation(&self.value) } } func f() { let box = Box { } let s = "meow" box.mutate { value in value = { s } } } f()

niw

@swift-5.9.2

class Box<T> { private var value: T init(_ value: T) { self.value = value } func mutate(_ mutation: (inout T) -> Void) { mutation(&self.value) } } func f() { let box = Box { } let s = "meow" box.mutate { value in value = { s } } } f()

exit status: 134 with <stdin>:22:13: warning: expression of type 'String' is unused s ^

stderr.log

9.52 KB

@swift-5.7.3

class Box<T> { private var value: T init(_ value: T) { self.value = value } func mutate(_ mutation: (inout T) -> Void) { mutation(&self.value) } } func f() { let box = Box { } let s = "meow" box.mutate { value in value = { s } } } f()

niw

@swift-5.7.3

class Box<T> { private var value: T init(_ value: T) { self.value = value } func mutate(_ mutation: (inout T) -> Void) { mutation(&self.value) } } func f() { let box = Box { } let s = "meow" box.mutate { value in value = { s } } } f()

<stdin>:22:13: warning: expression of type 'String' is unused s ^

@swift-5.8.1 -enable-upcoming-feature ExistentialAny protocol Foo {} struct A { var x: Foo var y: Codable var z: Error }

Miwa / Ensan

@swift-5.8.1 -enable-upcoming-feature ExistentialAny protocol Foo {} struct A { var x: Foo var y: Codable var z: Error }

exit status: 1 with <stdin>:3:12: error: use of protocol 'Foo' as a type must be written 'any Foo' var x: Foo ^~~ any Foo

Codableも許されてんの・・・？？？

1:15 PM

@swift-main -enable-upcoming-feature ExistentialAny protocol Foo {} struct A { var x: Foo var y: Codable var z: Error }

omochimetaru

@swift-main -enable-upcoming-feature ExistentialAny protocol Foo {} struct A { var x: Foo var y: Codable var z: Error }

exit status: 1 with

<stdin>:3:12: error: use of protocol 'Foo' as a type must be written 'any Foo' var x: Foo ^~~ any Foo <stdin>:4:12: error: use of 'Codable' (aka 'Decodable & Encodable') as a type must be written 'any Codable' (aka 'any Decodable & Encodable') var y: Codable ^~~~~~~ any Codable <stdin>:4:12: error: use of 'Codable' (aka 'Decodable & Encodable') as a type must be written 'any Codable' (aka 'any Decodable & Encodable') var y: Codable ^~~~~~~ any Codable <stdin>:5:12: error: use of protocol 'Error' as a type must be written 'any Error' var z: Error ^~~~~ any Error

@swift-main -enable-upcoming-feature ExistentialAny func foo() -> Result<Int, Error> { fatalError() }

omochimetaru

@swift-main -enable-upcoming-feature ExistentialAny func foo() -> Result<Int, Error> { fatalError() }

exit status: 1 with

<stdin>:1:27: error: use of protocol 'Error' as a type must be written 'any Error' func foo() -> Result<Int, Error> { fatalError() } ^~~~~ any Error

@swift-main import Foundation URL(fileURLWithPath: ".").appending(path: "foo")

omochimetaru

@swift-main import Foundation URL(fileURLWithPath: ".").appending(path: "foo")

exit status: 1 with

<stdin>:2:27: error: value of type 'URL' has no member 'appending' URL(fileURLWithPath: ".").appending(path: "foo") ~~~~~~~~~~~~~~~~~~~~~~~~~ ^~~~~~~~~

@swift-5.2.5 @swift-5.3.3

 func animate( animations: @escaping () -> Void, completion: ((Bool) -> Void)? = nil ) { print("animations") animations() print("completion") completion?(true) } animate { print(1) }

omochimetaru

@swift-5.2.5 @swift-5.3.3

 func animate( animations: @escaping () -> Void, completion: ((Bool) -> Void)? = nil ) { print("animations") animations() print("completion") completion?(true) } animate { print(1) }

exit status: 1 with

<stdin>:11:16: error: missing argument for parameter 'animations' in call animate { print(1) } ^ (animations: <#() -> Void#>) <stdin>:1:14: note: 'animate(animations:completion:)' declared here func animate( ^ <stdin>:11:17: error: cannot convert value of type '() -> ()' to expected argument type '((Bool) -> Void)?' animate { print(1) } ^

omochimetaru

@swift-5.2.5 @swift-5.3.3

 func animate( animations: @escaping () -> Void, completion: ((Bool) -> Void)? = nil ) { print("animations") animations() print("completion") completion?(true) } animate { print(1) }

animations 1 completion

@swift-5.2.5 @swift-5.3.3

 func animate( animations: (() -> Void)? = nil, completion: (() -> Void)? = nil ) { print("animations") animations?() print("completion") completion?() } animate { print(1) }

omochimetaru

@swift-5.2.5 @swift-5.3.3

 func animate( animations: (() -> Void)? = nil, completion: (() -> Void)? = nil ) { print("animations") animations?() print("completion") completion?() } animate { print(1) }

animations completion 1

omochimetaru

@swift-5.2.5 @swift-5.3.3

 func animate( animations: (() -> Void)? = nil, completion: (() -> Void)? = nil ) { print("animations") animations?() print("completion") completion?() } animate { print(1) }

animations completion 1

<stdin>:11:17: warning: backward matching of the unlabeled trailing closure is deprecated; label the argument with 'completion' to suppress this warning animate { print(1) } ^ (completion: ) <stdin>:1:14: note: 'animate(animations:completion:)' declared here func animate( ^

@swift-5.8.1 @swift-5.8.1 -enable-upcoming-feature ForwardTrailingClosures

 func animate( animations: (() -> Void)? = nil, completion: (() -> Void)? = nil ) { print("animations") animations?() print("completion") completion?() } animate { print(1) }

omochimetaru

@swift-5.8.1 @swift-5.8.1 -enable-upcoming-feature ForwardTrailingClosures

 func animate( animations: (() -> Void)? = nil, completion: (() -> Void)? = nil ) { print("animations") animations?() print("completion") completion?() } animate { print(1) }

animations 1 completion

@swift-5.8.1

 func animate( animations: (() -> Void)? = nil, completion: (() -> Void)? = nil ) { print("animations") animations?() print("completion") completion?() } animate { print(1) }

omochimetaru

@swift-5.8.1

 func animate( animations: (() -> Void)? = nil, completion: (() -> Void)? = nil ) { print("animations") animations?() print("completion") completion?() } animate { print(1) }

animations completion 1

<stdin>:11:17: warning: backward matching of the unlabeled trailing closure is deprecated; label the argument with 'completion' to suppress this warning animate { print(1) } ^ (completion: ) <stdin>:1:14: note: 'animate(animations:completion:)' declared here func animate( ^

(1) <= 5.2：単純な後方マッチ、ハメられてコンパイルできない場合がある (2) >= 5.3 : 原則後方マッチ、ただし関数引数の数？でマッチ位置を変更することで、前方マッチのような気持ちで書ける。曖昧になる場合は後方マッチしつつ警告を出す (3) >= 6.0 : 前方マッチ。先述の警告を出す場合で素直に前方マッチする。 (4) >= 5.8 : フラグで(2)か(3)を選べる

@swift-main @swift-5.8.1

protocol P {} protocol Q<T> { associatedtype T } typealias PQ<T> = P & Q<T> func f() { let foo: any Q<Int> let bar: any P & Q<Int> let baz: any (P & Q<Int>) let qux: any PQ<Int> }

(edited)

Iceman

@swift-main @swift-5.8.1

protocol P {} protocol Q<T> { associatedtype T } typealias PQ<T> = P & Q<T> func f() { let foo: any Q<Int> let bar: any P & Q<Int> let baz: any (P & Q<Int>) let qux: any PQ<Int> }

(edited)

exit status: 1 with

<stdin>:8:22: error: non-protocol, non-class type 'Q<Int>' cannot be used within a protocol-constrained type let bar: any P & Q<Int> ^ <stdin>:9:23: error: non-protocol, non-class type 'Q<Int>' cannot be used within a protocol-constrained type let baz: any (P & Q<Int>) ^

(edited)

Iceman

@swift-main @swift-5.8.1

protocol P {} protocol Q<T> { associatedtype T } typealias PQ<T> = P & Q<T> func f() { let foo: any Q<Int> let bar: any P & Q<Int> let baz: any (P & Q<Int>) let qux: any PQ<Int> }

(edited)

exit status: 1 with

<stdin>:8:22: error: non-protocol, non-class type 'Q<Int>' cannot be used within a protocol-constrained type let bar: any P & Q<Int> ^ <stdin>:9:23: error: non-protocol, non-class type 'Q<Int>' cannot be used within a protocol-constrained type let baz: any (P & Q<Int>) ^

(edited)

P & Q<T> のexistential、aliasをかませないと使えない

2

https://github.com/apple/swift/blob/main/test/type/parameterized_existential.swift

swift/parameterized_existential.swift at main · apple/swift

The Swift Programming Language. Contribute to apple/swift development by creating an account on GitHub.

8:30 AM

テストケースこのディレクトリらへんな気がするけど確かに書いてない気がする

/// Not supported as a protocol composition term for now protocol SomeProto {} func protocolCompositionNotSupported1(_: SomeProto & Sequence<Int>) {} // expected-error@-1 {{non-protocol, non-class type 'Sequence<Int>' cannot be used within a protocol-constrained type}} func protocolCompositionNotSupported2(_: any SomeProto & Sequence<Int>) {} // expected-error@-1 {{non-protocol, non-class type 'Sequence<Int>' cannot be used within a protocol-constrained type}}

8:32 AM

ファイル末尾に書いてありました！

見逃したーっ

@swift-5.8.1 @swift-5.9.2 @swift-main

protocol Middleware<Input, Output, NextInput, NextOutput> { associatedtype Input associatedtype Output associatedtype NextInput associatedtype NextOutput } protocol Routes<Input, Output> { associatedtype Input associatedtype Output } extension Routes { func compose<M>(_ middleware: M) -> any Routes<M.NextInput, M.NextOutput> where M: Middleware, M.Input == Input, M.Output == Output { fatalError() } func mapInput<NewInput>( _ transform: @escaping (Input) -> NewInput ) -> any Routes<NewInput, Output> { fatalError() } } struct Request {} struct Response {} struct User {} struct AuthMiddleware<Input, Output>: Middleware { typealias NextInput = (Input, login: User) typealias NextOutput = Output } func main(routes: any Routes<Request, Response>) { let routes = routes.compose(AuthMiddleware()) .mapInput { (request: $0.0, login: $0.login) } }

omochimetaru

@swift-5.8.1 @swift-5.9.2 @swift-main

protocol Middleware<Input, Output, NextInput, NextOutput> { associatedtype Input associatedtype Output associatedtype NextInput associatedtype NextOutput } protocol Routes<Input, Output> { associatedtype Input associatedtype Output } extension Routes { func compose<M>(_ middleware: M) -> any Routes<M.NextInput, M.NextOutput> where M: Middleware, M.Input == Input, M.Output == Output { fatalError() } func mapInput<NewInput>( _ transform: @escaping (Input) -> NewInput ) -> any Routes<NewInput, Output> { fatalError() } } struct Request {} struct Response {} struct User {} struct AuthMiddleware<Input, Output>: Middleware { typealias NextInput = (Input, login: User) typealias NextOutput = Output } func main(routes: any Routes<Request, Response>) { let routes = routes.compose(AuthMiddleware()) .mapInput { (request: $0.0, login: $0.login) } }

exit status: 139 with

<stdin>:39:9: warning: initialization of immutable value 'routes' was never used; consider replacing with assignment to '_' or removing it let routes = routes.compose(AuthMiddleware()) ~~~~^~~~~~

stderr.log

7.62 KB

omochimetaru

@swift-5.8.1 @swift-5.9.2 @swift-main

protocol Middleware<Input, Output, NextInput, NextOutput> { associatedtype Input associatedtype Output associatedtype NextInput associatedtype NextOutput } protocol Routes<Input, Output> { associatedtype Input associatedtype Output } extension Routes { func compose<M>(_ middleware: M) -> any Routes<M.NextInput, M.NextOutput> where M: Middleware, M.Input == Input, M.Output == Output { fatalError() } func mapInput<NewInput>( _ transform: @escaping (Input) -> NewInput ) -> any Routes<NewInput, Output> { fatalError() } } struct Request {} struct Response {} struct User {} struct AuthMiddleware<Input, Output>: Middleware { typealias NextInput = (Input, login: User) typealias NextOutput = Output } func main(routes: any Routes<Request, Response>) { let routes = routes.compose(AuthMiddleware()) .mapInput { (request: $0.0, login: $0.login) } }

exit status: 134 with

swift-frontend: /home/build-user/swift/lib/AST/RequirementMachine/Symbol.cpp:93: swift::rewriting::Symbol::Storage::Storage(Symbol::Kind, swift::CanType, ArrayRef<swift::rewriting::Term>): Assertion `!type->hasTypeVariable()' failed. Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -new-driver-path /usr/bin/swift-driver -empty-abi-descriptor -plugin-path /usr/lib/swift/host/plugins -plugin-path /usr/local/lib/swift/host/plugins -resource-dir /usr/lib/swift -module-name main

stderr.log

14.11 KB

omochimetaru

@swift-5.8.1 @swift-5.9.2 @swift-main

protocol Middleware<Input, Output, NextInput, NextOutput> { associatedtype Input associatedtype Output associatedtype NextInput associatedtype NextOutput } protocol Routes<Input, Output> { associatedtype Input associatedtype Output } extension Routes { func compose<M>(_ middleware: M) -> any Routes<M.NextInput, M.NextOutput> where M: Middleware, M.Input == Input, M.Output == Output { fatalError() } func mapInput<NewInput>( _ transform: @escaping (Input) -> NewInput ) -> any Routes<NewInput, Output> { fatalError() } } struct Request {} struct Response {} struct User {} struct AuthMiddleware<Input, Output>: Middleware { typealias NextInput = (Input, login: User) typealias NextOutput = Output } func main(routes: any Routes<Request, Response>) { let routes = routes.compose(AuthMiddleware()) .mapInput { (request: $0.0, login: $0.login) } }

exit status: 134 with

swift-frontend: /home/build-user/swift/lib/AST/RequirementMachine/Symbol.cpp:93: swift::rewriting::Symbol::Storage::Storage(Symbol::Kind, swift::CanType, ArrayRef<swift::rewriting::Term>): Assertion `!type->hasTypeVariable()' failed. Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -new-driver-path /usr/bin/swift-driver -empty-abi-descriptor -plugin-path /usr/lib/swift/host/plugins -plugin-path /usr/local/lib/swift/host/plugins -resource-dir /usr/lib/swift -module-name main

stderr.log

14.11 KB

駄目かあ　報告しよう・・・

5:03 AM

よく見ると落ちてるのは推論器ではない・・・？

@swift-5.8.1 -version Docker Hubにswift:5.8.1来てるのにボットが更新されないの何故かと調べたら、arm64しか更新されてないからだった。

norio_nomura

@swift-5.8.1 -version Docker Hubにswift:5.8.1来てるのにボットが更新されないの何故かと調べたら、arm64しか更新されてないからだった。

Swift version 5.8 (swift-5.8-RELEASE) Target: x86_64-unknown-linux-gnu

自動更新での新規タグチェック、プラットフォームまでは考慮してなかった。

amd64 も来始めてますね (edited)

https://hub.docker.com/_/swift/tags?page=1&name=5.8.1

swift Tags | Docker Hub

Swift is a high-performance system programming language, to learn more about Swift visit swift.org.

あれ，すみません．latest とか slim がまだ切り替わっていないだけでしたね．ただ https://www.swift.org/download/ に Coming Soon とあるので待てば来るとは思いますが...

latestや5.8はarm64だとswift-5.8.1-RELEASEですが、amd64だとswift-5.8-RELEASEになってます。

@swift-5.9.2

let flag = Bool.random() let num1 = if flag { 1.0 } else { 0.5 } let num2 = flag ? 1.0 : 0.5 let num3 = flag ? 1.0 : if flag { 1.0 } else { 0.5 }

treastrain / Tanaka.R

@swift-5.9.2

let flag = Bool.random() let num1 = if flag { 1.0 } else { 0.5 } let num2 = flag ? 1.0 : 0.5 let num3 = flag ? 1.0 : if flag { 1.0 } else { 0.5 }

exit status: 1 with

<stdin>:5:25: error: 'if' may only be used as expression in return, throw, or as the source of an assignment let num3 = flag ? 1.0 : if flag { 1.0 } else { 0.5 } ^

swift59

exit status: 1 with

<stdin>:5:25: error: 'if' may only be used as expression in return, throw, or as the source of an assignment let num3 = flag ? 1.0 : if flag { 1.0 } else { 0.5 } ^

これは Swift 5.9 では許されないんでしょうか……

エラーメッセージ見る限りそうみたいですね式として使える状況が限定されてる

1

ありがとうございます

SE-0380 を改めて確認し、限定的な導入であると理解しました…

たしかどこでも使えるようにすると文法が曖昧になるとかそういう話があったと思います一行の関数の時だけreturn省略できるやつみたいにしばりがある

私も「result builder のときどうなる…？」などの疑問があったのですが、SE-0380 時点では一旦限定条件下で…… ということだったんですね

そうですね。今後緩和していきたいのかどうかは忘れました。future directionに書いてあるかもしれない。

1

@swift-5.9.2

func check<each T>(_ val: repeat each T) { print("check begin") repeat print(each val, terminator: " ") print("\ncheck end") } check(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250)

nanasi

@swift-5.9.2

func check<each T>(_ val: repeat each T) { print("check begin") repeat print(each val, terminator: " ") print("\ncheck end") } check(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250)

check begin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 check end

手元のマシンで上限を調べてみたら 2046 個まで出来て、基本的に限界気にせず使えると考えて良さそうですね

おお〜すごい

2:38 PM

@swift-5.9.2 print(if Bool.random() { 1 } else { 2 })

Iceman

@swift-5.9.2 print(if Bool.random() { 1 } else { 2 })

exit status: 1 with

<stdin>:1:7: error: 'if' may only be used as expression in return, throw, or as the source of an assignment print(if Bool.random() { 1 } else { 2 }) ^

@swift-5.9.2 let v = if Bool.random() { 1 } else { 2 } print(v)

Iceman

@swift-5.9.2 let v = if Bool.random() { 1 } else { 2 } print(v)

2

なんか限定されてるのか

1

@swift-5.9.2 struct Foo: ~Copyable { consuming func foo() { _ = consume self } }

ジュニア

@swift-5.9.2 struct Foo: ~Copyable { consuming func foo() { _ = consume self } }

no output

@swift-5.8.1 enum E: Int32, CaseIterable { case aaa case bbb = -1 case ccc } print(E.allCases.map(\.rawValue))

Iceman

@swift-5.8.1 enum E: Int32, CaseIterable { case aaa case bbb = -1 case ccc } print(E.allCases.map(\.rawValue))

exit status: 1 with

<stdin>:4:8: error: raw value for enum case is not unique case ccc ^ <stdin>:3:14: note: raw value auto-incremented from here case bbb = -1 ^ <stdin>:2:8: note: raw value previously used here case aaa ^ <stdin>:2:8: note: raw value implicitly auto-incremented from zero case aaa ^

これ知らなかった

4:34 AM

cccは1になったりするのではなく、エラーとして検出される

@swift-4.0.3 @swift-5.1.5 enum E { case foo(values: Int...) } (edited)

Iceman

@swift-4.0.3 @swift-5.1.5 enum E { case foo(values: Int...) } (edited)

exit status: 1 with <stdin>:2:12: error: variadic enum cases are not supported case foo(values: Int...) ^ (edited)

@swift-5.9.2

import Foundation let data = """ "Hello" """.data(using: .utf8)! print(try! JSONDecoder().decode(String.self, from: data))

(edited)

3:05 AM

あれ、反応がないな

Hello

Iceman

@swift-5.9.2

import Foundation let data = """ "Hello" """.data(using: .utf8)! print(try! JSONDecoder().decode(String.self, from: data))

(edited)

Hello

Iceman

@swift-5.9.2

import Foundation let data = """ "Hello" """.data(using: .utf8)! print(try! JSONDecoder().decode(String.self, from: data))

(edited)

exit status: 1 with

<stdin>:5:23: error: argument passed to call that takes no arguments print(try! JSONDecoder(String.self, from: data)) ^~~~~~~~~~~~~~~~~~~~~~~~~

Iceman

@swift-5.9.2

import Foundation let data = """ "Hello" """.data(using: .utf8)! print(try! JSONDecoder().decode(String.self, from: data))

(edited)

exit status: 1 with

<stdin>:5:52: error: value of optional type 'Data?' must be unwrapped to a value of type 'Data' print(try! JSONDecoder().decode(String.self, from: data)) ^ <stdin>:5:52: note: coalesce using '??' to provide a default when the optional value contains 'nil' print(try! JSONDecoder().decode(String.self, from: data)) ^ ?? <#default value#> <stdin>:5:52: note: force-unwrap using '!' to abort execution if the optional value contains 'nil' print(try! JSONDecoder().decode(String.self, from: data)) ^ !

Iceman

@swift-5.9.2

import Foundation let data = """ "Hello" """.data(using: .utf8)! print(try! JSONDecoder().decode(String.self, from: data))

(edited)

Hello

swiftボットは、入力メッセージの変更に合わせて応答メッセージも更新します。実行結果を応答する時、入力メッセージが実行の元となった時と同じかどうかのチェックをしていないため、変更前入力の実行に時間がかかり変更後入力の完了より後になると、上記の様なボットへの入力と応答の不整合が発生します。

返答がなくて止まってるのかと思いきや50分後にまとめて返ってきたのがびっくりという感じですね

ボット的にはメッセージを受け取って即座に返した形ぽい。Discordで不具合が起きていたぽい？

message.txt

910 bytes

なるほど。そういうこともあるんですね

Swift 5.10 Nightlyはまだ5.10と名乗らない @swift-5.10.1 -version (edited)

norio_nomura

Swift 5.10 Nightlyはまだ5.10と名乗らない @swift-5.10.1 -version (edited)

Swift version 5.9-dev (LLVM df22cff92bb6f9d, Swift fdf50a99df2d1b0) Target: x86_64-unknown-linux-gnu (edited)

@swift-5.9.2

import Foundation struct TupleValue<T> { let value: T init(_ value: T) { print("✅", "init Type-A") self.value = value } init<each C>(_ value: T) where T == (repeat each C) { print("✅", "init Type-B") self.value = (repeat each value) } } _ = TupleValue(1) _ = TupleValue((1, 2))

7:32 PM

@swift-5.9.2 --version

7:32 PM

うーん、遅れてまとめて受け取ってるけど、反応がないのは謎だ。エラーも出てないし。

message.txt

553 bytes

1

treastrain / Tanaka.R

@swift-5.9.2 --version

Swift version 5.9-dev (LLVM 3708b80be7731a7, Swift aaafc31485ff571) Target: x86_64-unknown-linux-gnu

treastrain / Tanaka.R

@swift-5.9.2

import Foundation struct TupleValue<T> { let value: T init(_ value: T) { print("✅", "init Type-A") self.value = value } init<each C>(_ value: T) where T == (repeat each C) { print("✅", "init Type-B") self.value = (repeat each value) } } _ = TupleValue(1) _ = TupleValue((1, 2))

✅ init Type-A ✅ init Type-A

12:22 AM

no output

@swift-5.9.2 -version

norio_nomura

@swift-5.9.2 -version

Swift version 5.9 (swift-5.9-RELEASE) Target: x86_64-unknown-linux-gnu

@swift-5.9.2 var a = 1 let b = consume a

omochimetaru

@swift-5.9.2 var a = 1 let b = consume a

exit status: 1 with

<stdin>:2:17: error: 'consume' applied to value that the compiler does not support. This is a compiler bug. Please file a bug with a small example of the bug let b = consume a ^

@swift-5.9.2 var a = "" let b = consume a

omochimetaru

@swift-5.9.2 var a = "" let b = consume a

exit status: 1 with

<stdin>:2:17: error: 'consume' applied to value that the compiler does not support. This is a compiler bug. Please file a bug with a small example of the bug let b = consume a ^

@swift-5.9.2 func main() { var a = "" let b = consume a }

omochimetaru

@swift-5.9.2 func main() { var a = "" let b = consume a }

<stdin>:2:7: warning: variable 'a' was never mutated; consider changing to 'let' constant var a = "" ~~~ ^ let <stdin>:3:7: warning: initialization of immutable value 'b' was never used; consider replacing with assignment to '_' or removing it let b = consume a ~~~~^ _

@swift-5.9.2 func main() { var a = 1 let b = consume a }

omochimetaru

@swift-5.9.2 func main() { var a = 1 let b = consume a }

exit status: 1 with

<stdin>:2:7: warning: variable 'a' was never mutated; consider changing to 'let' constant var a = 1 ~~~ ^ let <stdin>:3:7: warning: initialization of immutable value 'b' was never used; consider replacing with assignment to '_' or removing it let b = consume a ~~~~^ _ <stdin>:3:19: error: 'consume' applied to value that the compiler does not support. This is a compiler bug. Please file a bug with a small example of the bug let b = consume a ^

@swift-5.8.1

public func callee() async -> (() -> ()) { fatalError() } public func caller() async { async let future = callee() let result = await future result() }

shiz

@swift-5.8.1

public func callee() async -> (() -> ()) { fatalError() } public func caller() async { async let future = callee() let result = await future result() }

exit status: 134 with

<unknown>:0: error: fatal error encountered during compilation; please submit a bug report (https://swift.org/contributing/#reporting-bugs) <unknown>:0: note: SmallVector unable to grow. Requested capacity (4294967296) is larger than maximum value for size type (4294967295) Stack dump:

stderr.log

5.38 KB

@swift-5.9.2

public func callee() async -> (() -> ()) { fatalError() } public func caller() async { async let future = callee() let result = await future result() }

shiz

@swift-5.9.2

public func callee() async -> (() -> ()) { fatalError() } public func caller() async { async let future = callee() let result = await future result() }

exit status: 134 with

<unknown>:0: error: fatal error encountered during compilation; please submit a bug report (https://swift.org/contributing/#reporting-bugs) <unknown>:0: note: SmallVector unable to grow. Requested capacity (4294967296) is larger than maximum value for size type (4294967295) Stack dump:

stderr.log

5.46 KB

@swift-5.10.1

public func callee() async -> (() -> ()) { fatalError() } public func caller() async { async let future = callee() let result = await future result() }

shiz

@swift-5.10.1

public func callee() async -> (() -> ()) { fatalError() } public func caller() async { async let future = callee() let result = await future result() }

exit status: 134 with

swift-frontend: /home/build-user/swift/lib/SILGen/SILGenPoly.cpp:2859: void (anonymous namespace)::ResultPlanner::plan(swift::Lowering::AbstractionPattern, swift::CanType, swift::Lowering::AbstractionPattern, swift::CanType, swift::CanSILFunctionType, swift::CanSILFunctionType): Assertion `AllInnerResults.empty()' failed. Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -new-driver-path /usr/bin/swift-driver -empty-abi-descriptor -resource-dir /usr/lib/swift -module-name main -plugin-path /usr/lib/swift/host/plugins -plugin-path /usr/local/lib/swift/host/plugins

stderr.log

7.79 KB

@swift-main

public func callee() async -> (() -> ()) { fatalError() } public func caller() async { async let future = callee() let result = await future result() }

shiz

@swift-main

public func callee() async -> (() -> ()) { fatalError() } public func caller() async { async let future = callee() let result = await future result() }

no output

@swift-5.9.2 demangle $s11SwiftSyntax09AttributeB0V9argumentsAC9ArgumentsOSgvg

Iceman

@swift-5.9.2 demangle $s11SwiftSyntax09AttributeB0V9argumentsAC9ArgumentsOSgvg

$s11SwiftSyntax09AttributeB0V9argumentsAC9ArgumentsOSgvg ---> SwiftSyntax.AttributeSyntax.arguments.getter : SwiftSyntax.AttributeSyntax.Arguments?

ゲッターだ。

5:52 AM

AC9のところでめっちゃ圧縮効いてる

@swift-5.9.2 var a = [1] a.popFirst()

omochimetaru

@swift-5.9.2 var a = [1] a.popFirst()

exit status: 1 with

<stdin>:2:3: error: referencing instance method 'popFirst()' on 'Collection' requires the types '[Int]' and 'ArraySlice<Int>' be equivalent a.popFirst() ^ Swift.Collection:1:11: note: where 'Self' = '[Int]', 'Self.SubSequence' = 'ArraySlice<Int>' extension Collection where Self == Self.SubSequence { ^

@swift-5.9.2 var a = [1, 2] var b = a[...] print(b) print(b.popFirst()) print(b)

omochimetaru

@swift-5.9.2 var a = [1, 2] var b = a[...] print(b) print(b.popFirst()) print(b)

[1, 2] Optional(1) [2]

<stdin>:4:7: warning: expression implicitly coerced from 'Int?' to 'Any' print(b.popFirst()) ^~~~~~~~~~~~ <stdin>:4:9: note: provide a default value to avoid this warning print(b.popFirst()) ~~^~~~~~~~~~ ?? <#default value#> <stdin>:4:9: note: force-unwrap the value to avoid this warning print(b.popFirst()) ~~^~~~~~~~~~ ! <stdin>:4:9: note: explicitly cast to 'Any' with 'as Any' to silence this warning print(b.popFirst()) ~~^~~~~~~~~~ as Any

@swift-main -enable-experimental-feature PackIteration func use<each T>(_ values: repeat each T) { for value in repeat each values { print(type(of: value)) } }

Iceman

@swift-main -enable-experimental-feature PackIteration func use<each T>(_ values: repeat each T) { for value in repeat each values { print(type(of: value)) } }

exit status: 1 with

<stdin>:2:18: error: value pack expansion can only appear inside a function argument list or tuple element for value in repeat each values { ^

@swift-main -enable-upcoming-feature PackIteration func use<each T>(_ values: repeat each T) { for value in repeat each values { print(type(of: value)) } }

Iceman

@swift-main -enable-upcoming-feature PackIteration func use<each T>(_ values: repeat each T) { for value in repeat each values { print(type(of: value)) } }

exit status: 1 with

<stdin>:2:18: error: value pack expansion can only appear inside a function argument list or tuple element for value in repeat each values { ^

@swift-main -enable-experimental-forward-mode-differentiation

import _Differentiation @differentiable(reverse) func x_2(_ x: Double) -> Double { return x * x } let x: Double = 1.0 let grad_x = gradient(of: { (x: Double) in x_2(x) })(x) print(grad_x)

ProfFan

@swift-main -enable-experimental-forward-mode-differentiation

import _Differentiation @differentiable(reverse) func x_2(_ x: Double) -> Double { return x * x } let x: Double = 1.0 let grad_x = gradient(of: { (x: Double) in x_2(x) })(x) print(grad_x)

2.0

@swift-main @swift-5.9.2 struct S {} extension S { func f() { _ = consume self } }

Iceman

@swift-main @swift-5.9.2 struct S {} extension S { func f() { _ = consume self } }

no output

Iceman

@swift-main @swift-5.9.2 struct S {} extension S { func f() { _ = consume self } }

no output

@swift-5.7.3 @swift-5.6.3

func nonIsolatedFunc() async { print(Thread.isMainThread) try? await Task.sleep(nanoseconds: 1_000_000) print(Thread.isMainThread) } Task { @MainActor in await nonIsolatedFunc() }

kntk

@swift-5.7.3 @swift-5.6.3

func nonIsolatedFunc() async { print(Thread.isMainThread) try? await Task.sleep(nanoseconds: 1_000_000) print(Thread.isMainThread) } Task { @MainActor in await nonIsolatedFunc() }

exit status: 1 with

<stdin>:2:11: error: cannot find 'Thread' in scope print(Thread.isMainThread) ^~~~~~ <stdin>:5:11: error: cannot find 'Thread' in scope print(Thread.isMainThread) ^~~~~~

kntk

@swift-5.7.3 @swift-5.6.3

func nonIsolatedFunc() async { print(Thread.isMainThread) try? await Task.sleep(nanoseconds: 1_000_000) print(Thread.isMainThread) } Task { @MainActor in await nonIsolatedFunc() }

exit status: 1 with

<stdin>:2:11: error: cannot find 'Thread' in scope print(Thread.isMainThread) ^~~~~~ <stdin>:5:11: error: cannot find 'Thread' in scope print(Thread.isMainThread) ^~~~~~

@swift-5.7.3 @swift-5.6.3

import Foundation func nonIsolatedFunc() async { print(Thread.isMainThread) try? await Task.sleep(nanoseconds: 1_000_000) print(Thread.isMainThread) } Task { @MainActor in await nonIsolatedFunc() }

kntk

@swift-5.7.3 @swift-5.6.3

import Foundation func nonIsolatedFunc() async { print(Thread.isMainThread) try? await Task.sleep(nanoseconds: 1_000_000) print(Thread.isMainThread) } Task { @MainActor in await nonIsolatedFunc() }

false

kntk

@swift-5.7.3 @swift-5.6.3

import Foundation func nonIsolatedFunc() async { print(Thread.isMainThread) try? await Task.sleep(nanoseconds: 1_000_000) print(Thread.isMainThread) } Task { @MainActor in await nonIsolatedFunc() }

false false

@swift-5.6.3 @swift-5.7.3

import Foundation func nonIsolatedFunc() async { print(Thread.isMainThread) try? await Task.sleep(nanoseconds: 1_000_000) print(Thread.isMainThread) } @MainActor func mainIsolatedFunc() async { await nonIsolatedFunc() } Task { await mainIsolatedFunc() }

kntk

@swift-5.6.3 @swift-5.7.3

import Foundation func nonIsolatedFunc() async { print(Thread.isMainThread) try? await Task.sleep(nanoseconds: 1_000_000) print(Thread.isMainThread) } @MainActor func mainIsolatedFunc() async { await nonIsolatedFunc() } Task { await mainIsolatedFunc() }

false

kntk

@swift-5.6.3 @swift-5.7.3

import Foundation func nonIsolatedFunc() async { print(Thread.isMainThread) try? await Task.sleep(nanoseconds: 1_000_000) print(Thread.isMainThread) } @MainActor func mainIsolatedFunc() async { await nonIsolatedFunc() } Task { await mainIsolatedFunc() }

exit status: 139 with stdout:false falsetimeout: the monitored command dumped core

1

@swift-5.6.3 @swift-5.7.3

import Foundation func nonIsolatedFunc() async { print("nonIsolated: \(Thread.isMainThread)") } @MainActor func mainIsolatedFunc() async { print("MainActor: \(Thread.isMainThread)") await nonIsolatedFunc() } Task { await mainIsolatedFunc() }

kntk

@swift-5.6.3 @swift-5.7.3

import Foundation func nonIsolatedFunc() async { print("nonIsolated: \(Thread.isMainThread)") } @MainActor func mainIsolatedFunc() async { print("MainActor: \(Thread.isMainThread)") await nonIsolatedFunc() } Task { await mainIsolatedFunc() }

no output

kntk

@swift-5.6.3 @swift-5.7.3

import Foundation func nonIsolatedFunc() async { print("nonIsolated: \(Thread.isMainThread)") } @MainActor func mainIsolatedFunc() async { print("MainActor: \(Thread.isMainThread)") await nonIsolatedFunc() } Task { await mainIsolatedFunc() }

no output

@swift-5.6.3

import Foundation func nonIsolatedFunc() async { print(Thread.isMainThread) try? await Task.sleep(nanoseconds: 1_000) print(Thread.isMainThread) } @MainActor func mainIsolatedFunc() async { await nonIsolatedFunc() print("aaa") } Task { await mainIsolatedFunc() }

kntk

@swift-5.6.3

import Foundation func nonIsolatedFunc() async { print(Thread.isMainThread) try? await Task.sleep(nanoseconds: 1_000) print(Thread.isMainThread) } @MainActor func mainIsolatedFunc() async { await nonIsolatedFunc() print("aaa") } Task { await mainIsolatedFunc() }

false

これTaskの完了をまたないと不安定だと思います

どうやって待つのが良いんでしょうか

await task.value

トップレベルawaitってないですよね...? これならCLIの結果を待てるってことでしょうか Task { @MainActor in await Task { await mainIsolatedFunc() }.value }

トップレベルawaitありますよ

11:39 PM

Swiftバージョンいくつから入ったかは忘れました

え、そうなんですか

https://github.com/apple/swift-evolution/blob/main/proposals/0343-top-level-concurrency.md

swift-evolution/proposals/0343-top-level-concurrency.md at main · a...

This maintains proposals for changes and user-visible enhancements to the Swift Programming Language. - apple/swift-evolution

11:41 PM

5.7からだ

oh...

5.6はセマフォとか使って自力で待つしかないっすね

1

@swift-5.6.3

import Foundation let lock = NSRecursiveLock() func nonIsolatedFunc() async { print(Thread.isMainThread) } @MainActor func mainIsolatedFunc() async { await nonIsolatedFunc() } Task { await mainIsolatedFunc() lock.unlock() } lock.lock()

kntk

@swift-5.6.3

import Foundation let lock = NSRecursiveLock() func nonIsolatedFunc() async { print(Thread.isMainThread) } @MainActor func mainIsolatedFunc() async { await nonIsolatedFunc() } Task { await mainIsolatedFunc() lock.unlock() } lock.lock()

no output

@swift-5.6.3

import Foundation let semaphore = DispatchSemaphore(value: 0) func nonIsolatedFunc() async { print(Thread.isMainThread) } @MainActor func mainIsolatedFunc() async { await nonIsolatedFunc() } Task { await mainIsolatedFunc() semaphore.signal() } semaphore.wait()

kntk

@swift-5.6.3

import Foundation let semaphore = DispatchSemaphore(value: 0) func nonIsolatedFunc() async { print(Thread.isMainThread) } @MainActor func mainIsolatedFunc() async { await nonIsolatedFunc() } Task { await mainIsolatedFunc() semaphore.signal() } semaphore.wait()

execution timeout with no output

これだとMainActorも止めてデッドロックしてしまいますね（？） (edited)

デッドロックするロジックになってるのでそうですね

11:50 PM

グローバルアクターを自分で定義するか、アクターにするのが良いですよ

1

11:50 PM

メインスレッドで待ちつつメインアクターを動かすのは Runloop 組まないと無理だと思います

5.7以前なら@mainのstatic func main() asyncにするのが良いですよ

1

11:51 PM

-parse-as-libraryつけないといけないけど。

https://github.com/apple/swift-evolution/blob/54d85f65fefce924eb4d5bf10dd633e81f063d11/proposals/0323-async-main-semantics.md

swift-evolution/proposals/0323-async-main-semantics.md at 54d85f65f...

This maintains proposals for changes and user-visible enhancements to the Swift Programming Language. - apple/swift-evolution

11:52 PM

ほんとだ async @main は5.5.2だったのか (edited)

11:52 PM

確かにそういえば実装順序が逆だったな

@swift-5.6.3 -parse-as-library

import Foundation @main struct Main { static func nonIsolatedFunc() async { print(Thread.isMainThread) } @MainActor static func mainIsolatedFunc() async { await nonIsolatedFunc() } static func main() async { await Task { await mainIsolatedFunc() }.value } }

kntk

@swift-5.6.3 -parse-as-library

import Foundation @main struct Main { static func nonIsolatedFunc() async { print(Thread.isMainThread) } @MainActor static func mainIsolatedFunc() async { await nonIsolatedFunc() } static func main() async { await Task { await mainIsolatedFunc() }.value } }

exit status: 1 with error: option '-parse-as-library' is not supported by 'swift'; did you mean to use 'swiftc'?

@swift-5.6.3 -Xfrontend -parse-as-library

import Foundation @main struct Main { static func nonIsolatedFunc() async { print(Thread.isMainThread) } @MainActor static func mainIsolatedFunc() async { await nonIsolatedFunc() } static func main() async { await Task { await mainIsolatedFunc() }.value } }

Yuta Saito

@swift-5.6.3 -Xfrontend -parse-as-library

import Foundation @main struct Main { static func nonIsolatedFunc() async { print(Thread.isMainThread) } @MainActor static func mainIsolatedFunc() async { await nonIsolatedFunc() } static func main() async { await Task { await mainIsolatedFunc() }.value } }

false

ありがとうございます;;;

11:56 PM

うーん

あれ？思ったのと違うな

MainActorだけ特別扱い説はありますね（？）

グローバルアクターを自分で定義するか、アクターにするのが良いですよ

独自アクターで、実行中のアクターを確認できるメソッドありましたっけ assertIsolatedとかは5.9からだったきが (edited)

assertIsolatedは関係ないです @MainActor で実験するのをやめたらどうかと思ったのです

11:59 PM

https://github.com/apple/swift-evolution/blob/54d85f65fefce924eb4d5bf10dd633e81f063d11/proposals/0338-clarify-execution-non-actor-async.md

swift-evolution/proposals/0338-clarify-execution-non-actor-async.md...

This maintains proposals for changes and user-visible enhancements to the Swift Programming Language. - apple/swift-evolution

11:59 PM

SE-0338によると、これが実装される前の時点だと actor executor を引き継ぎそうだったんだよな

5.6以前でActor-isolatedなasyn funccからnon-actor-isolatedなasync funcを呼び出す件の検証をしたいんですが MainActor（isMainThread）以外でActorが引き継がれているのをランタイムで見る方法を思い浮かばなかったので (edited)

In the current implementation, calls and returns from actor-isolated functions will continue running on that actor's executor. As a result, actors are effectively "sticky": once a task switches to an actor's executor, they will remain there until either the task suspends or it needs to run on a different actor.

kntk

5.6以前でActor-isolatedなasyn funccからnon-actor-isolatedなasync funcを呼び出す件の検証をしたいんですが MainActor（isMainThread）以外でActorが引き継がれているのをランタイムで見る方法を思い浮かばなかったので (edited)

あーなるほど。

12:01 AM

https://swiftfiddle.com/?c=H4sIAAAAAAAAA4WQPwvCMBDFv0rI1IJ008GpLgUHt45djqRisL2U5FKRku9ujootVPGy3J%2FH%2Bz0ySSWP0vSDdSQqG1ADGYtNemUPBoUnFxSJC%2FdTgyKVp6RR4hpQCbR49rYDanWV5iwX4J9p%2F5ZyDc4gZfXNtaAL49lpHvJZExnGTcmnkyLrthzO8g8EDzC0TbSifPf97VWDv6%2B3y2WbZ1HFYoQutB9ulDs5pl%2FeFwcZX%2BR8kBZxAQAA

Swift Online Playground

SwiftFiddle is an online playground for creating, sharing and embedding Swift fiddles (little Swift programs that run directly in your browser).

12:01 AM

swiftfiddleに5.6.0とかもあるけど -parse-as-library がうまくいかない

1

コンパイラオプション渡せなかったでしたっけ

0338が5.6.3とかにも適用されちゃってるのかな (edited)

Yuta Saito

コンパイラオプション渡せなかったでしたっけ

渡したんだけど変なエラーがでた

12:02 AM

12:03 AM

↑実行結果1はそのまま、実行結果2はオプションを渡した後

なんか追加してるのがダメっぽいな。こんなん追加してたかな。

12:05 AM

追加してたわ。こうなってるから@mainはダメだ。直せたら直します。

try """ import Glibc setbuf(stdout, nil) /* Start user code. Do not edit comment generated here */ \(code) """ .data(using: .utf8)? .write(to: temporaryPath.appendingPathComponent("main.swift"))

1

@swift-5.5.3 -Xfrontend -parse-as-library

import Foundation @main struct Main { static func nonIsolatedFunc() async { print(Thread.isMainThread) } @MainActor static func mainIsolatedFunc() async { await nonIsolatedFunc() } static func main() async { await Task { await mainIsolatedFunc() }.value } }

kntk

@swift-5.5.3 -Xfrontend -parse-as-library

import Foundation @main struct Main { static func nonIsolatedFunc() async { print(Thread.isMainThread) } @MainActor static func mainIsolatedFunc() async { await nonIsolatedFunc() } static func main() async { await Task { await mainIsolatedFunc() }.value } }

false

1

Kishikawa Katsumi

追加してたわ。こうなってるから@mainはダメだ。直せたら直します。

try """ import Glibc setbuf(stdout, nil) /* Start user code. Do not edit comment generated here */ \(code) """ .data(using: .utf8)? .write(to: temporaryPath.appendingPathComponent("main.swift"))

なるほど・・・

12:09 AM

main actorは別っぽいなあ

ってことですかねぇ

多分0388以前は caller 側でhopする実装になってるんだろう (edited)

1

12:09 AM

通常のactorで試そう

12:15 AM

@swift-5.9.2 -Xfrontend -parse-as-library

import Foundation func nonIsolatedFunc() async { let thread = (Thread.current.threadDictionary["thread"] as? String) ?? "runtime thread" print("\(thread) at \(#function)") } actor A { func actorMethod() async { Thread.current.threadDictionary["thread"] = "actor thread" await nonIsolatedFunc() } } @main struct Main { static func main() async { let a = A() await a.actorMethod() } }

(edited)

omochimetaru

@swift-5.9.2 -Xfrontend -parse-as-library

import Foundation func nonIsolatedFunc() async { let thread = (Thread.current.threadDictionary["thread"] as? String) ?? "runtime thread" print("\(thread) at \(#function)") } actor A { func actorMethod() async { Thread.current.threadDictionary["thread"] = "actor thread" await nonIsolatedFunc() } } @main struct Main { static func main() async { let a = A() await a.actorMethod() } }

(edited)

actor thread at nonIsolatedFunc() (edited)

5.9でもexecutorは切り替えると言ったがデフォルトアクタースレッドと物理スレッドは同じ・・・

1

12:17 AM

実験するのが難しいな・・・

12:18 AM

5.9ならexecutor指定できるけど5.6で同じ事ができないから対比できないし

@swift-5.6.3 -Xfrontend -parse-as-library

import Foundation @globalActor actor HogeActor { static var shared = HogeActor() } @main struct Main { @HogeActor static func isolatedFunc() async { print(Thread.isMainThread) } static func main() async { print(Thread.isMainThread) await Task { print(Thread.isMainThread) await isolatedFunc() print(Thread.isMainThread) }.value } }

kntk

@swift-5.6.3 -Xfrontend -parse-as-library

import Foundation @globalActor actor HogeActor { static var shared = HogeActor() } @main struct Main { @HogeActor static func isolatedFunc() async { print(Thread.isMainThread) } static func main() async { print(Thread.isMainThread) await Task { print(Thread.isMainThread) await isolatedFunc() print(Thread.isMainThread) }.value } }

true false false false

そのTaskいらないですよ

12:19 AM

mainがasyncなんで

ああそうですね

12:20 AM

@swift-5.6.3 -Xfrontend -parse-as-library

import Foundation @globalActor actor HogeActor { static var shared = HogeActor() } @main struct Main { @HogeActor static func isolatedFunc() async { print(Thread.isMainThread) } static func main() async { print(Thread.isMainThread) await isolatedFunc() print(Thread.isMainThread) } }

kntk

@swift-5.6.3 -Xfrontend -parse-as-library

import Foundation @globalActor actor HogeActor { static var shared = HogeActor() } @main struct Main { @HogeActor static func isolatedFunc() async { print(Thread.isMainThread) } static func main() async { print(Thread.isMainThread) await isolatedFunc() print(Thread.isMainThread) } }

true false false

お

12:20 AM

ていうかそこかよｗ

@swift-5.9.2 -Xfrontend -parse-as-library

import Foundation @globalActor actor HogeActor { static var shared = HogeActor() } @main struct Main { @HogeActor static func isolatedFunc() async { print(Thread.isMainThread) } static func main() async { print(Thread.isMainThread) await isolatedFunc() print(Thread.isMainThread) } }

kntk

@swift-5.9.2 -Xfrontend -parse-as-library

import Foundation @globalActor actor HogeActor { static var shared = HogeActor() } @main struct Main { @HogeActor static func isolatedFunc() async { print(Thread.isMainThread) } static func main() async { print(Thread.isMainThread) await isolatedFunc() print(Thread.isMainThread) } }

true false false

non isolated funcに飛ぶ時に切り替わるか、ではなくて、戻ってこれるかになってますね

12:21 AM

これ別のバグじゃないか？ｗ

ああ、true/falseだけじゃ判別できないですね

あれ、手元でやったらmainにもどってこれた

12:22 AM

static func mainはmain actorじゃないのかな

12:22 AM

@swift-5.9.2 -Xfrontend -parse-as-library

import Foundation @globalActor actor HogeActor { static var shared = HogeActor() } @main struct Main { @HogeActor static func isolatedFunc() async { print(Thread.isMainThread) } @MainActor static func main() async { print(Thread.isMainThread) await isolatedFunc() print(Thread.isMainThread) } }

omochimetaru

@swift-5.9.2 -Xfrontend -parse-as-library

import Foundation @globalActor actor HogeActor { static var shared = HogeActor() } @main struct Main { @HogeActor static func isolatedFunc() async { print(Thread.isMainThread) } @MainActor static func main() async { print(Thread.isMainThread) await isolatedFunc() print(Thread.isMainThread) } }

true false false

戻ってこれねえ

static func mainはMainActorのはず

これバグってますよ

www

なんじゃこりゃ。しかも5.9で起こってるのか

Linuxで @main の main がawait後にmain actorに戻ってこれない問題

これdarwinだと戻ってくるんですか？

うん。macだとtrue/false/trueになった。

おお

12:24 AM

バグってますね

元の話題なんだけど、executorが同一であることって観測できなくないか？

1

12:26 AM

スレッドが同一でも、スレッドを共有する異なるexecutorかもしれない

12:26 AM

「executorが異なること」は並列な実行が発生したら確定するけど

12:26 AM

逆は、確定しない。

ブロッキングなタスクを投げ続けて、止まったら同一だと確認できませんか？

！

12:27 AM

あーいや

12:27 AM

executorが違ってもスレッドが共有されていると

12:27 AM

両方のexecutorがブロックされちゃうから

12:27 AM

同一に見えても同一ではないかもしれない (edited)

なるほど。たしかにその可能性はありそうですね

omochimetaru

non isolated funcに飛ぶ時に切り替わるか、ではなくて、戻ってこれるかになってますね

バグの件はそうなんですが SE-0338によると It calls some other async function which then returns, resuming the caller. と戻ってくるケースも引き継ぐと書いてあるので true, falseになれば引き継がれることが証明できるかなと思ったんですが、mainがMainActorじゃダメですね... static func main() async { print(Thread.isMainThread) await isolatedFunc() print(Thread.isMainThread) }

https://discord.com/channels/291054398077927425/430242233468452865/1169429570399764480 ↑これがそう、スレッド同じ

あとは何かローレベルなアンスコAPIがあった気がする

12:30 AM

というか、executorが一緒でも同じスレッドで動かすとは限らないと思うんですが、元々やりたいことって何なんでしたっけ

executorが一緒でも同じスレッドで動かすとは限らない

たしかに・・・

https://github.com/apple/swift-evolution/blob/main/proposals/0338-clarify-execution-non-actor-async.md によると、actor-isolated-async functionからnon-actor-isolated-async functionを呼び出すと executorを引き継ぐと書いてあるんです（swift5.7未満） (edited)

swift-evolution/proposals/0338-clarify-execution-non-actor-async.md...

This maintains proposals for changes and user-visible enhancements to the Swift Programming Language. - apple/swift-evolution

Iceman

というか、executorが一緒でも同じスレッドで動かすとは限らないと思うんですが、元々やりたいことって何なんでしたっけ

SE-0338に書いてある「導入以前」の挙動の観測がしたい

なるほど。

5.6以前でも

12:34 AM

ここまで実験した限りだと

12:34 AM

main actorから non isolated を呼ぶと、メインスレッドから離れる。

12:35 AM

ただ0338によるとそれ以前の挙動がフォーマルに定義されていたわけではないから、main actorだけはメインスレッドを手放すように実装されていたとしても矛盾はしない

@swift-5.6.3 -Xfrontend -parse-as-library

import Foundation func nonIsolatedFunc() async { Thread.sleep(forTimeInterval: 1) } actor A { func isolatedFunc() async { let begin = Date() print("begin") for _ in 0..<4 { Task { await nonIsolatedFunc() } } Thread.sleep(forTimeInterval: 1) let dur = Date().timeIntervalSince(begin) print("end \(dur)") } } @main struct Main { @MainActor static func main() async { await A().isolatedFunc() } }

(edited)

omochimetaru

@swift-5.6.3 -Xfrontend -parse-as-library

import Foundation func nonIsolatedFunc() async { Thread.sleep(forTimeInterval: 1) } actor A { func isolatedFunc() async { let begin = Date() print("begin") for _ in 0..<4 { Task { await nonIsolatedFunc() } } Thread.sleep(forTimeInterval: 1) let dur = Date().timeIntervalSince(begin) print("end \(dur)") } } @main struct Main { @MainActor static func main() async { await A().isolatedFunc() } }

(edited)

begin end 1.0875169038772583 (edited)

@swift-5.6.3 -Xfrontend -parse-as-library

import Foundation func nonIsolatedFunc() async { Thread.sleep(forTimeInterval: 1) } actor A { func isolatedFunc() async { let begin = Date() print("begin") for _ in 0..<32 { Task { await nonIsolatedFunc() } } Thread.sleep(forTimeInterval: 1) await Task.yield() let dur = Date().timeIntervalSince(begin) print("end \(dur)") } } @main struct Main { @MainActor static func main() async { await A().isolatedFunc() } }

(edited)

omochimetaru

@swift-5.6.3 -Xfrontend -parse-as-library

import Foundation func nonIsolatedFunc() async { Thread.sleep(forTimeInterval: 1) } actor A { func isolatedFunc() async { let begin = Date() print("begin") for _ in 0..<32 { Task { await nonIsolatedFunc() } } Thread.sleep(forTimeInterval: 1) await Task.yield() let dur = Date().timeIntervalSince(begin) print("end \(dur)") } } @main struct Main { @MainActor static func main() async { await A().isolatedFunc() } }

(edited)

begin end 4.000944972038269 (edited)

お、できた気がする

12:46 AM

お前のコアは4コアか

12:46 AM

いや、そうともかぎらない

12:47 AM

@swift-5.6.3 -Xfrontend -parse-as-library

import Foundation func nonIsolatedFunc() async { Thread.sleep(forTimeInterval: 1) } actor A { func isolatedFunc() async { let begin = Date() print("begin") for _ in 0..<32 { Task { await nonIsolatedFunc() } } Thread.sleep(forTimeInterval: 1) await Task.yield() let dur = Date().timeIntervalSince(begin) print("end \(dur)") } } @main struct Main { @MainActor static func main() async { await A().isolatedFunc() } }

omochimetaru

@swift-5.6.3 -Xfrontend -parse-as-library

import Foundation func nonIsolatedFunc() async { Thread.sleep(forTimeInterval: 1) } actor A { func isolatedFunc() async { let begin = Date() print("begin") for _ in 0..<32 { Task { await nonIsolatedFunc() } } Thread.sleep(forTimeInterval: 1) await Task.yield() let dur = Date().timeIntervalSince(begin) print("end \(dur)") } } @main struct Main { @MainActor static func main() async { await A().isolatedFunc() } }

begin end 4.000761032104492

@swift-5.7.3 -Xfrontend -parse-as-library

import Foundation func nonIsolatedFunc() async { Thread.sleep(forTimeInterval: 1) } actor A { func isolatedFunc() async { let begin = Date() print("begin") for _ in 0..<32 { Task { await nonIsolatedFunc() } } Thread.sleep(forTimeInterval: 1) await Task.yield() let dur = Date().timeIntervalSince(begin) print("end \(dur)") } } @main struct Main { @MainActor static func main() async { await A().isolatedFunc() } }

omochimetaru

@swift-5.7.3 -Xfrontend -parse-as-library

import Foundation func nonIsolatedFunc() async { Thread.sleep(forTimeInterval: 1) } actor A { func isolatedFunc() async { let begin = Date() print("begin") for _ in 0..<32 { Task { await nonIsolatedFunc() } } Thread.sleep(forTimeInterval: 1) await Task.yield() let dur = Date().timeIntervalSince(begin) print("end \(dur)") } } @main struct Main { @MainActor static func main() async { await A().isolatedFunc() } }

begin end 4.016860008239746

ズコー

1

12:48 AM

手元のmacだと1秒なんですけどね。

12:49 AM

あー違うわ

12:49 AM

これTaskがactor contextを継承しちゃってるから

12:49 AM

nonIsolatedFuncが分離されてても結局Taskがactorを混線させる

@swift-5.6.3 -Xfrontend -parse-as-library

import Foundation @globalActor actor HogeActor { static var shared = HogeActor() } @main struct Main { @MainActor static func mainActorFunc() async { } static func nonisolatedFunc() async { print(Thread.isMainThread) await mainActorFunc() print(Thread.isMainThread) } static func main() async { await Task { @HogeActor in await nonisolatedFunc() }.value } }

kntk

@swift-5.6.3 -Xfrontend -parse-as-library

import Foundation @globalActor actor HogeActor { static var shared = HogeActor() } @main struct Main { @MainActor static func mainActorFunc() async { } static func nonisolatedFunc() async { print(Thread.isMainThread) await mainActorFunc() print(Thread.isMainThread) } static func main() async { await Task { @HogeActor in await nonisolatedFunc() }.value } }

false false

1

ちゃんとmainから戻ってこれてるね

12:58 AM

やっぱmainは5.6以前も特殊なのでは (edited)

1

うーんんんん

12:59 AM

検証できないのに~~SE-0306~~ SE-0338で明言されてるのはどういうことなんですかね Swiftのコンパイラを覗いたらわかるってことですか？ (edited)

これのパッチがあればテストコードの前後が見れそうコンパイラと言うかSILが違う気がしてる

なるほど

あとまあだからタイトルが「Clarify」なんじゃないかなあ (edited)

なるほど

以前の挙動はそもそも観測できない/曖昧　だから検証不能だとしても

1:02 AM

それ以降に機能が増えたりしていく過程で観測可能になる可能性があって

1:03 AM

それに備えて何が仕様なのか事前に明確化したかった、ように見える。

1:04 AM

@_unsafeInheritExecutor This async function uses the pre-SE-0338 semantics of unsafely inheriting the caller's executor. This is an underscored feature because the right way of inheriting an executor is to pass in the required executor and switch to it. Unfortunately, there are functions in the standard library which need to inherit their caller's executor but cannot change their ABI because they were not defined as @_alwaysEmitIntoClient in the initial release.

naruhodo

https://github.com/apple/swift/commit/b3b6701a50a879e697dc25090f43af93597aade4

Implement @_unsafeInheritExecutor. · apple/swift@b3b6701

SE-0338 changed the execution of non-actor async functions so that they always hop to the generic executor, but some functions need a way to suppress this so that they inherit the caller's ...

1:07 AM

https://github.com/apple/swift/pull/41376

Inherit the caller's executor in with*Continuation by rjmccall · ...

Not inheriting the caller's executor is a major problem for these functions. Under SE-0338, treating them as non-isolated means that it's illegal to pass them anything non-Sendable from a ...

1:10 AM

SE-0388導入後に一部のstdlibが壊れたから0388以前に戻すためにこのアトリビュートを実装している

1:11 AM

0388挙動導入のパッチを見つけたいな

1:12 AM

https://github.com/rjmccall/swift/commit/716f4b9e2fc0cb9ec96ba19a0c65d71cf3b7e9bf

Hop to the generic executor in non-actor-isolated async functions. ...

Async functions are now expected to set ExpectedExecutor in their prologue (and, generally, immediately hop to it). I updated the prologue code for a bunch of function emission, most of which was ...

1:13 AM

This is the first half of SE-0338; the second, sendability enforcement, is much more complicated, and Doug has volunteered to do it.

1:13 AM

https://github.com/apple/swift/pull/40910

Run non-actor-isolated async functions on the generic executor by r...

Fixes rdar://79284465

1:14 AM

プルリクに何も書いてなくてコミットメッセージに書いてあるパターンだ

with...Continuation系が特別に同期的に呼び出しされるのは知ってましたが、それって@_unsafeInheritExecutorつけることで実現されてたんですね

Iceman

with...Continuation系が特別に同期的に呼び出しされるのは知ってましたが、それって@_unsafeInheritExecutorつけることで実現されてたんですね

ですね。Swift部分も普通には実装できなそうで謎だったけど、これみたいですね

1:22 AM

1:23 AM

左: asyncを呼び出す時、呼び出し側で、「現在のexecutorを採取」して、呼び出し先のexecutorに入って、呼び出して、その後「採取したexecutorに戻る」 (edited)

1:25 AM

あーここは微妙だな

1:26 AM

1

1:26 AM

こっちのほうがいいかな

1:26 AM

左: 現在のexecutorを採取、actor呼び出し、戻ったらexecutorを復旧右: 関数冒頭で自身のexecutorに突入、actor呼び出しから戻ったら再入

1:27 AM

冒頭で突入してるのが重要そう

1:28 AM

callerがactorでcalleeがnonisolatedなケースが一番大事か

1

1:30 AM

このパッチでは変わってない気がするこれがfirst halfだからか？

1:33 AM

いやわかった、そっちは昔から今まで変わってない

1:33 AM

これで説明ができる

1:33 AM

testAsyncFunction が (nonisolatedな)callee を呼ぶ流れを見ると (edited)

1:34 AM

左だと hop_to_exector が無い (CHECK-NOT) だから

1:34 AM

で、呼び出し側は MyActor に hop してから callee を呼ぶだけだから

1:35 AM

以前の挙動だと sticky な executor になってる

1:35 AM

右だと callee が内部で自分でグローバルアクターにhopするから

1:35 AM

Actorを手放してる

1:37 AM

@kntk まあそういうわけでSE-0388もコンパイラプロジェクトではSwiftコードではテストしてないですね、SILですね

1

1:37 AM

https://github.com/apple/swift/pull/41055

[5.6] Hop to the generic executor in non-actor-isolated async funct...

Async functions are now expected to set ExpectedExecutor in their prologue (and, generally, immediately hop to it). I updated the prologue code for a bunch of function emission, most of which was ...

1:38 AM

↑あともう一個見つけた、SE0388は5.6にも適用されてる

1:38 AM

なので 5.6.3 でテストするのは不適切かもしれない

1

左がCHECK: hop_to_executor MyActor ではなくCHECK NOTなのはなぜでしょう...?

kntk

左がCHECK: hop_to_executor MyActor ではなくCHECK NOTなのはなぜでしょう...?

昔の実装ではnon isolated funcはプロローグで自分のためにhopしないから。 (edited)

1:39 AM

CHECK NOTが書いてあるのは

1:39 AM

non isolatedだから、actorの中に入らないことを保証したかったんだろう

1

「non isolatedは何もしない」が仕様だったってことですね (edited)

actorのメソッドだからactorに入っちゃうバグが無いことをテストしてる

1:41 AM

testAsyncFunctionのprologueをみると

1:41 AM

自分でActorにhopしてるね

1:42 AM

うーん、ちょっと謎なのは、昔の実装で、caller側とcallee側冒頭で、二重にactor hopしてるように見える

1:44 AM

まあ hop_to_executor.swift をよく読めばどういう規則になっていたかわかりそうではある

1

@swift-5.5.3 -Xfrontend -parse-as-library

import Foundation @globalActor actor HogeActor { static var shared = HogeActor() } @main struct Main { @MainActor static func mainActorFunc() async { } static func nonisolatedFunc() async { print(Thread.isMainThread) await mainActorFunc() print(Thread.isMainThread) } static func main() async { await Task { @HogeActor in await nonisolatedFunc() }.value } }

kntk

@swift-5.5.3 -Xfrontend -parse-as-library

import Foundation @globalActor actor HogeActor { static var shared = HogeActor() } @main struct Main { @MainActor static func mainActorFunc() async { } static func nonisolatedFunc() async { print(Thread.isMainThread) await mainActorFunc() print(Thread.isMainThread) } static func main() async { await Task { @HogeActor in await nonisolatedFunc() }.value } }

false false

0388以前でも、「actorからの戻り」は実装されてたね、さっきのテストコードからすると

なるほど

actor isolatedから、nonisolatedに飛んだ時に、呼び出し元のactorを引きずる。

1

MainActorの場合は引きづらないことが確認できたと思うんですが SE-0338のsendable checkのPRでMainActorも例外ではないかのような記述がありました... https://github.com/apple/swift/pull/59086/files#diff-06572a96a58dc510037d5efa622f9bec8519bc1beab13c9f251e97e657a9d4edR34

[SE-0338] Implement Sendable checking for SE-0338 by DougGregor · P...

Implement most of the remaining places where Sendable checking is missing, but is required by either SE-0302 or SE-0338, including: When exiting an actor-isolated context to a non-isolated async c...

@swift-5.5.3 -Xfrontend -parse-as-library

import Foundation @main struct Main { static func nonisolatedFunc() async { print(Thread.isMainThread) } static func main() async { await nonisolatedFunc() } }

omochimetaru

@swift-5.5.3 -Xfrontend -parse-as-library

import Foundation @main struct Main { static func nonisolatedFunc() async { print(Thread.isMainThread) } static func main() async { await nonisolatedFunc() } }

true

お、できた

あら

ひきづった

1:50 AM

@swift-5.3.3 @swift-5.6.3 -Xfrontend -parse-as-library

import Foundation @main struct Main { static func nonisolatedFunc() async { print(Thread.isMainThread) } static func main() async { await nonisolatedFunc() } }

omochimetaru

@swift-5.3.3 @swift-5.6.3 -Xfrontend -parse-as-library

import Foundation @main struct Main { static func nonisolatedFunc() async { print(Thread.isMainThread) } static func main() async { await nonisolatedFunc() } }

true

おい

1

omochimetaru

@swift-5.3.3 @swift-5.6.3 -Xfrontend -parse-as-library

import Foundation @main struct Main { static func nonisolatedFunc() async { print(Thread.isMainThread) } static func main() async { await nonisolatedFunc() } }

exit status: 1 with <stdin>:4:34: error: consecutive declarations on a line must be separated by ';' static func nonisolatedFunc() async { ^

stderr.log

972 bytes

なに？？

5.3.3になってます

おお

@swift-5.5.3 -Xfrontend -parse-as-library

import Foundation @main struct Main { static func nonIsolatedFunc() async { print(Thread.isMainThread) } @MainActor static func mainIsolatedFunc() async { await nonIsolatedFunc() } static func main() async { await mainIsolatedFunc() } }

kntk

@swift-5.5.3 -Xfrontend -parse-as-library

import Foundation @main struct Main { static func nonIsolatedFunc() async { print(Thread.isMainThread) } @MainActor static func mainIsolatedFunc() async { await nonIsolatedFunc() } static func main() async { await mainIsolatedFunc() } }

true

@swift-5.5.3 @swift-5.6.3 @swift-5.7.3 -Xfrontend -parse-as-library

import Foundation @main struct Main { static func nonisolatedFunc() async { print(Thread.isMainThread) } static func main() async { await nonisolatedFunc() } }

omochimetaru

@swift-5.5.3 @swift-5.6.3 @swift-5.7.3 -Xfrontend -parse-as-library

import Foundation @main struct Main { static func nonisolatedFunc() async { print(Thread.isMainThread) } static func main() async { await nonisolatedFunc() } }

true

omochimetaru

@swift-5.5.3 @swift-5.6.3 @swift-5.7.3 -Xfrontend -parse-as-library

import Foundation @main struct Main { static func nonisolatedFunc() async { print(Thread.isMainThread) } static func main() async { await nonisolatedFunc() } }

true

omochimetaru

@swift-5.5.3 @swift-5.6.3 @swift-5.7.3 -Xfrontend -parse-as-library

import Foundation @main struct Main { static func nonisolatedFunc() async { print(Thread.isMainThread) } static func main() async { await nonisolatedFunc() } }

false

おおおおおお

5.6.3はどういう状態なんだｗ

1:52 AM

さっきのパッチはなんだったの

@swift-5.5.3 -Xfrontend -parse-as-library

import Foundation @main struct Main { static func nonIsolatedFunc() async { print(Thread.isMainThread) } @MainActor static func mainIsolatedFunc() async { await nonIsolatedFunc() } static func main() async { await Task { await mainIsolatedFunc() }.value } }

kntk

@swift-5.5.3 -Xfrontend -parse-as-library

import Foundation @main struct Main { static func nonIsolatedFunc() async { print(Thread.isMainThread) } @MainActor static func mainIsolatedFunc() async { await nonIsolatedFunc() } static func main() async { await Task { await mainIsolatedFunc() }.value } }

false

kntk

MainActorの場合は引きづらないことが確認できたと思うんですが SE-0338のsendable checkのPRでMainActorも例外ではないかのような記述がありました... https://github.com/apple/swift/pull/59086/files#diff-06572a96a58dc510037d5efa622f9bec8519bc1beab13c9f251e97e657a9d4edR34

お、このパッチがsecond halfっぽいな

1

これは僕が無駄なTaskを使ってLinuxのバグを踏んだせいですね...戦犯でした (edited)

1:53 AM

あれ、でもこれでもできなきゃいけないのか

カオスだ

www

mainIsolatedFunc→nonIsolatedFuncは同じなのに

1:54 AM

外側がmainかTaskかで変わっている

@swift-5.5.3 -Xfrontend -parse-as-library

import Foundation @main struct Main { static func main() async { print(Thread.isMainThread) await Task { print(Thread.isMainThread) }.value } }

kntk

@swift-5.5.3 -Xfrontend -parse-as-library

import Foundation @main struct Main { static func main() async { print(Thread.isMainThread) await Task { print(Thread.isMainThread) }.value } }

true false

Contextの引き継ぎもできてない...

それがもうおかしいね？

1:55 AM

バグも混ざっててめっちゃ謎だな　さっきの5.6パッチはいったい5.6.のいくつに入ってるんだ

@swift-5.9.2 -Xfrontend -parse-as-library

import Foundation @main struct Main { static func main() async { print(Thread.isMainThread) await Task { print(Thread.isMainThread) }.value } }

Iceman

@swift-5.9.2 -Xfrontend -parse-as-library

import Foundation @main struct Main { static func main() async { print(Thread.isMainThread) await Task { print(Thread.isMainThread) }.value } }

true false

終わってる

www

なんか思ってたんと違うな

1:56 AM

なにこれ・・・

LinuxでまともにConcurrency使えない説...

Linuxではmain actor使わないから大丈夫

それでいうとMainThreadかどうかに関心がないので大丈夫ですね

なるほど

GlobalActorを使う機会がない

@swift-5.9.2 -Xfrontend -parse-as-library

import Foundation @main struct Main { static func main() async { print(Thread.isMainThread) await Task { @MainActor in print(Thread.isMainThread) }.value } }

kntk

@swift-5.9.2 -Xfrontend -parse-as-library

import Foundation @main struct Main { static func main() async { print(Thread.isMainThread) await Task { @MainActor in print(Thread.isMainThread) }.value } }

true false

Linux で Desktop GUI をやると死ぬかも。

1

えぇ・・・

ｗｗｗｗ

ああいや、そもそもLinuxのMainActorが常にメインスレッドだとは言ってないのでは

なるほど

@swift-5.9.2 -Xfrontend -parse-as-library

import Foundation @main struct Main { static func main() async { MainActor.shared.assertIsolated() await Task { @MainActor in MainActor.shared.assertIsolated() }.value } }

omochimetaru

@swift-5.9.2 -Xfrontend -parse-as-library

import Foundation @main struct Main { static func main() async { MainActor.shared.assertIsolated() await Task { @MainActor in MainActor.shared.assertIsolated() }.value } }

no output

@swift-5.9.2 -Xfrontend -parse-as-library

import Foundation @main struct Main { static func main() async { print(Thread.isMainThread) Task { @MainActor in print(Thread.isMainThread) } print("blocking!!!") sleep(2) print("blocking end") } }

(edited)

いけてそう　その説よさそう

あー

Iceman

@swift-5.9.2 -Xfrontend -parse-as-library

import Foundation @main struct Main { static func main() async { print(Thread.isMainThread) Task { @MainActor in print(Thread.isMainThread) } print("blocking!!!") sleep(2) print("blocking end") } }

(edited)

true blocking!!! blocking end (edited)

ありゃ、だめかも

それ多分2つ目のprintが実行する前に終わっちゃった

ああそうか、先頭にprintあるの忘れてました

LinuxではMainActorがメインスレッドじゃない説あるなこれ (edited)

@swift-5.9.2 -Xfrontend -parse-as-library

import Foundation @main struct Main { static func main() async { print(Thread.isMainThread) Task { @MainActor in print(Thread.isMainThread) } print("blocking!!!") sleep(2) print("blocking end") sleep(1) } }

Iceman

@swift-5.9.2 -Xfrontend -parse-as-library

import Foundation @main struct Main { static func main() async { print(Thread.isMainThread) Task { @MainActor in print(Thread.isMainThread) } print("blocking!!!") sleep(2) print("blocking end") sleep(1) } }

true blocking!!! blocking end

意味ないな、RunLoopとかじゃないとだめだ

ただしmainは当然メインスレッド

2:03 AM

mainから先の突入時は別のスレッド

とりあえずMainActorが常にMainThreadである必要が元々ないので、必要に応じて別スレッドに移動してるのかも

https://github.com/apple/swift/blob/30cdd3c53eb82a5664fe08f28b0047afb6ca96b1/stdlib/public/Concurrency/MainActor.swift#L24

swift/stdlib/public/Concurrency/MainActor.swift at 30cdd3c53eb82a56...

The Swift Programming Language. Contribute to apple/swift development by creating an account on GitHub.

MainActorがMainThreadではないにしても MainThreadだったらMainActorなんですかね

2:07 AM

MainThreadがMainActor以外で実行されるならこの実験もexecutorを引き継いでると言えなく...（まあ多分このケースは引き継いでそうですが）

import Foundation @main struct Main { static func nonisolatedFunc() async { print(Thread.isMainThread) } static func main() async { await nonisolatedFunc() } }

理屈上はnoとは言えないけど流石に実装がそうなってなさそう

1

2:08 AM

他のexecutorがメインスレッドに投げてくるとUI止まって困るから。

2:08 AM

https://github.com/apple/swift/blob/30cdd3c53eb82a5664fe08f28b0047afb6ca96b1/stdlib/public/Concurrency/GlobalExecutor.cpp#L190-L199

swift/stdlib/public/Concurrency/GlobalExecutor.cpp at 30cdd3c53eb82...

The Swift Programming Language. Contribute to apple/swift development by creating an account on GitHub.

2:08 AM

うーん、Linuxでもmain queueにはなってそうなんだけどなー

2:11 AM

DispatchQueueとThreadの関係もまたややこしいからなあ

最小構成でデバッグする必要性を痛感しました

2:12 AM

ひとまず元のSE-0338の検証ができたので満足です、ありがとうございました！！！

1

@swift-5.5.3 @swift-5.6.3 @swift-5.7.3 -Xfrontend -parse-as-library

import Foundation @main struct Main { static func nonisolatedFunc() async { print(Thread.isMainThread) try? await Task.sleep(nanoseconds: 1_000) print(Thread.isMainThread) } static func main() async { await nonisolatedFunc() } }

(edited)

kntk

@swift-5.5.3 @swift-5.6.3 @swift-5.7.3 -Xfrontend -parse-as-library

import Foundation @main struct Main { static func nonisolatedFunc() async { print(Thread.isMainThread) try? await Task.sleep(nanoseconds: 1_000) print(Thread.isMainThread) } static func main() async { await nonisolatedFunc() } }

(edited)

true false (edited)

kntk

@swift-5.5.3 @swift-5.6.3 @swift-5.7.3 -Xfrontend -parse-as-library

import Foundation @main struct Main { static func nonisolatedFunc() async { print(Thread.isMainThread) try? await Task.sleep(nanoseconds: 1_000) print(Thread.isMainThread) } static func main() async { await nonisolatedFunc() } }

(edited)

true false (edited)

kntk

@swift-5.5.3 @swift-5.6.3 @swift-5.7.3 -Xfrontend -parse-as-library

import Foundation @main struct Main { static func nonisolatedFunc() async { print(Thread.isMainThread) try? await Task.sleep(nanoseconds: 1_000) print(Thread.isMainThread) } static func main() async { await nonisolatedFunc() } }

(edited)

false false (edited)

おー、suspendしたらexectorが変わるのも観測できました（忘れていた） (edited)

5.6.3はやっぱ適用されてないのか？

さっきのPRのマージコミットのタグでははswift-5.7 development-snapshotって書いてますね...? （見方あってますかね...?） https://github.com/apple/swift/commit/9eb9df83c01849602243152a1e07e2e5b76f2385 (edited)

Merge pull request #40910 from rjmccall/hop-to-generic-executor · a...

Run non-actor-isolated async functions on the generic executor

そっちじゃなくてこっちです https://github.com/apple/swift/pull/41055

[5.6] Hop to the generic executor in non-actor-isolated async funct...

Async functions are now expected to set ExpectedExecutor in their prologue (and, generally, immediately hop to it). I updated the prologue code for a bunch of function emission, most of which was ...

なるほど

2:45 AM

https://github.com/apple/swift/pull/41272

[5.6] Revert the partial SE-0338 implementation by rjmccall · Pull ...

This reverts commit 0106bde (#41055). Applying the SE-0338 semantics change to standard library functions like with*Continuation is causing bugs. The type of the closure argument to these function...

2:45 AM

なんかリリースブランチだけしか出てこないな

2:46 AM

https://github.com/apple/swift/pull/41272

[5.6] Revert the partial SE-0338 implementation by rjmccall · Pull ...

This reverts commit 0106bde (#41055). Applying the SE-0338 semantics change to standard library functions like with*Continuation is causing bugs. The type of the closure argument to these function...

2:46 AM

Revertされてる！！！

なるほど、ここでさっきのアンダースコアのattributeの流れなんですね (edited)

繋がったー

2:47 AM

じゃあ結局5.6では出荷できなかったんだ。

1

@swift-5.9.2 import Foundation let int: Int = 0 let uint: UInt = 0 print(int == uint)

trickart

@swift-5.9.2 import Foundation let int: Int = 0 let uint: UInt = 0 print(int == uint)

true

== ってIntとUInt比較できるような感じで定義されてるんですね (コード書いててコンパイル通って驚いた)

@swift-5.9.2 actor Foo { var values: [Int] = [] func f() { Task { await useSome(values[0]) } } } func useSome(_ v: Int) async {}

Iceman

@swift-5.9.2 actor Foo { var values: [Int] = [] func f() { Task { await useSome(values[0]) } } } func useSome(_ v: Int) async {}

exit status: 1 with

<stdin>:5:27: error: actor-isolated property 'values' cannot be passed 'inout' to 'async' function call await useSome(values[0]) ^ <stdin>:2:9: note: property declared here var values: [Int] = [] ^

これ受け側の引数がinout指定してないんだからinout Intが勝手にIntに変化してくれてもいい気がするけど、そうじゃないんですね

@swift-5.9.2 actor Foo { var values: [Int] = [] func f() { Task { _ = values[0] } } }

omochimetaru

@swift-5.9.2 actor Foo { var values: [Int] = [] func f() { Task { _ = values[0] } } }

no output

これならいいのか。

3:02 PM

@swift-5.9.2 actor Foo { var values: [Int] = [] func f() { Task { await asyncFn() _ = values[0] } } } func asyncFn() async {} (edited)

omochimetaru

@swift-5.9.2 actor Foo { var values: [Int] = [] func f() { Task { await asyncFn() _ = values[0] } } } func asyncFn() async {} (edited)

no output

1回変数においたりすれば使える

{ [values] が楽そう

一応escapingな想定なので、コピーしちゃうのはタイミングがずれて値がかわりうるのでNGなんですよね

1

@swift-5.9.2 func f() -> Int { return fatalError() }

omochimetaru

@swift-5.9.2 func f() -> Int { return fatalError() }

exit status: 1 with

<stdin>:2:10: error: cannot convert return expression of type 'Never' to return type 'Int' return fatalError() ^~~~~~~~~~~~

あーそうなの

@swift-5.9.2 import RegexBuilder let regex = Regex { "x" } let text = "xxx" print(text.matches(of: regex).count) (edited)

noppe

@swift-5.9.2 import RegexBuilder let regex = Regex { "x" } let text = "xxx" print(text.matches(of: regex).count) (edited)

3 (edited)

@swift-5.9.2

import RegexBuilder let regex = Regex { NegativeLookahead { Regex { Optionally(Anchor.wordBoundary.inverted) ":" ZeroOrMore(CharacterClass.anyOf(":").inverted) } } "_" NegativeLookahead { Regex { ZeroOrMore(CharacterClass.anyOf(":").inverted) ":" Optionally(Anchor.wordBoundary.inverted) } } } let txt = "\u{200C}:c_huzer01:" _ = txt.matches(of: regex)

(edited)

noppe

@swift-5.9.2

import RegexBuilder let regex = Regex { NegativeLookahead { Regex { Optionally(Anchor.wordBoundary.inverted) ":" ZeroOrMore(CharacterClass.anyOf(":").inverted) } } "_" NegativeLookahead { Regex { ZeroOrMore(CharacterClass.anyOf(":").inverted) ":" Optionally(Anchor.wordBoundary.inverted) } } } let txt = "\u{200C}:c_huzer01:" _ = txt.matches(of: regex)

(edited)

execution timeout with no output (edited)

11:47 AM

@swift-5.9.2

import RegexBuilder let regex = Regex { NegativeLookahead { Regex { Optionally(Anchor.wordBoundary.inverted) ":" ZeroOrMore(CharacterClass.anyOf(":").inverted) } } "_" NegativeLookahead { Regex { ZeroOrMore(CharacterClass.anyOf(":").inverted) ":" Optionally(Anchor.wordBoundary.inverted) } } }.wordBoundaryKind(.simple) let txt = "\u{200C}:c_huzer01:" _ = txt.matches(of: regex)

noppe

@swift-5.9.2

import RegexBuilder let regex = Regex { NegativeLookahead { Regex { Optionally(Anchor.wordBoundary.inverted) ":" ZeroOrMore(CharacterClass.anyOf(":").inverted) } } "_" NegativeLookahead { Regex { ZeroOrMore(CharacterClass.anyOf(":").inverted) ":" Optionally(Anchor.wordBoundary.inverted) } } }.wordBoundaryKind(.simple) let txt = "\u{200C}:c_huzer01:" _ = txt.matches(of: regex)

no output

wordBoundary怪しい動きしてるなぁ

@swift-main

final class C: Sendable { @MainActor var a: [Int] = [] @MainActor func b() {} func foo() async { await MainActor.run { self.a = [1] self.b() } } } @MainActor func main() async { let c = C() c.a = [1] c.b() }

omochimetaru

@swift-main

final class C: Sendable { @MainActor var a: [Int] = [] @MainActor func b() {} func foo() async { await MainActor.run { self.a = [1] self.b() } } } @MainActor func main() async { let c = C() c.a = [1] c.b() }

<stdin>:2:20: warning: stored property 'a' of 'Sendable'-conforming class 'C' is mutable @MainActor var a: [Int] = [] ^

@swift-main

import Foundation print(Thread.current.isMainThread) func main() async { let task = Task { @MainActor () in print(Thread.current.isMainThread) } await task.value } await main()

(edited)

omochimetaru

@swift-main

import Foundation print(Thread.current.isMainThread) func main() async { let task = Task { @MainActor () in print(Thread.current.isMainThread) } await task.value } await main()

(edited)

true false (edited)

@swift-main

import Foundation MainActor.preconditionIsolated() print(Thread.current.isMainThread) func main() async { let task = Task { @MainActor () in MainActor.preconditionIsolated() print(Thread.current.isMainThread) } await task.value } await main()

(edited)

omochimetaru

@swift-main

import Foundation MainActor.preconditionIsolated() print(Thread.current.isMainThread) func main() async { let task = Task { @MainActor () in MainActor.preconditionIsolated() print(Thread.current.isMainThread) } await task.value } await main()

(edited)

true false

お〜

3:43 AM

@swift-main let task = Task { print(1) MainActor.preconditionIsolated("it should be fail") print(2) } await task.value (edited)

omochimetaru

@swift-main let task = Task { print(1) MainActor.preconditionIsolated("it should be fail") print(2) } await task.value (edited)

1 2 (edited)

いや、除去されてるなこれ・・・

おや？

3:44 AM

@swift-main let task = Task.detached { print(1) MainActor.preconditionIsolated("it should be fail") print(2) } await task.value

あ〜

Iceman

@swift-main let task = Task.detached { print(1) MainActor.preconditionIsolated("it should be fail") print(2) } await task.value

exit status: 132 with

main/<stdin>:3: Precondition failed: Incorrect actor executor assumption; Expected 'UnownedSerialExecutor(executor: (Opaque Value))' executor. it should be fail #0 0x0000555ae7c8b977 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/usr/bin/swift-frontend+0x7852977) #1 0x0000555ae7c896ce llvm::sys::RunSignalHandlers() (/usr/bin/swift-frontend+0x78506ce)

stderr.log

4.51 KB

動いてそう。

あざす　あざす　なるほど。

暗黙のMainActorっぽですね

なので、Linuxではメインスレッドじゃないけどメインアクター、ということはやはりあって

3:45 AM

アクターコンテキストの実験はassertIsolated系のAPIで調べるのが正しい方法のようだ (edited)

@swift-5.9.2

typealias Foo = () -> Void typealias Bar = @escaping () -> Void typealias Baz = @MainActor @escaping () -> Void print(MemoryLayout<Foo>.size) print(MemoryLayout<Bar>.size) print(MemoryLayout<Baz>.size)

Iceman

@swift-5.9.2

typealias Foo = () -> Void typealias Bar = @escaping () -> Void typealias Baz = @MainActor @escaping () -> Void print(MemoryLayout<Foo>.size) print(MemoryLayout<Bar>.size) print(MemoryLayout<Baz>.size)

exit status: 1 with

<stdin>:2:17: error: @escaping attribute may only be used in function parameter position typealias Bar = @escaping () -> Void ^~~~~~~~~~ <stdin>:3:28: error: @escaping attribute may only be used in function parameter position typealias Baz = @MainActor @escaping () -> Void ^~~~~~~~~~

@swift-main

import Foundation let task = Task { @MainActor () in print(Thread.current.isMainThread) dispatchPrecondition(condition: .onQueue(.main)) dispatchPrecondition(condition: .notOnQueue(.main)) } await task.value

(edited)

omochimetaru

@swift-main

import Foundation let task = Task { @MainActor () in print(Thread.current.isMainThread) dispatchPrecondition(condition: .onQueue(.main)) dispatchPrecondition(condition: .notOnQueue(.main)) } await task.value

(edited)

exit status: 132 with

 #0 0x000055e9b7c2d977 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/usr/bin/swift-frontend+0x7852977) #1 0x000055e9b7c2b6ce llvm::sys::RunSignalHandlers() (/usr/bin/swift-frontend+0x78506ce) #2 0x000055e9b7c2dfea SignalHandler(int) Signals.cpp:0:0

(edited)

stderr.log

3.43 KB

メインスレッドじゃないことはあってもメインキューではないことはなさそう。

4:17 AM

MainActor A singleton actor whose executor is equivalent to the main dispatch queue. 説明もそうなっとるし。

4:18 AM

https://github.com/apple/swift/blob/main/stdlib/public/Concurrency/Actor.cpp#L311-L314

4:19 AM

なんか見つけた。コンラッドさんのTODOだ。

4:19 AM

そして間違った判定が書かれているｗ

@swift-main

func foo<I: Actor>(actor: isolated I, body: @Sendable () -> Void) { // await不要 bar(actor: actor, body: body) } func bar<I: Actor>(actor: isolated I, body: @Sendable () -> Void) {} @MainActor func main() async { // await必要。なんで？ await foo(actor: MainActor.shared, body: { }) }

omochimetaru

@swift-main

func foo<I: Actor>(actor: isolated I, body: @Sendable () -> Void) { // await不要 bar(actor: actor, body: body) } func bar<I: Actor>(actor: isolated I, body: @Sendable () -> Void) {} @MainActor func main() async { // await必要。なんで？ await foo(actor: MainActor.shared, body: { }) }

no output

@swift-main func foo(actor: isolated MainActor) { gui() } @MainActor func gui() {}

omochimetaru

@swift-main func foo(actor: isolated MainActor) { gui() } @MainActor func gui() {}

exit status: 1 with

<stdin>:2:3: error: call to main actor-isolated global function 'gui()' in a synchronous actor-isolated context gui() ^ <stdin>:5:6: note: calls to global function 'gui()' from outside of its actor context are implicitly asynchronous func gui() {} ^

これがそもそもダメなんだなあ

4:58 AM

あーこれは、インスタンスになるから意味的にもダメか

4:58 AM

MainActor.shared 以外のインスタンスが存在する可能性がある

5:00 AM

https://github.com/apple/swift-evolution/blob/main/proposals/0316-global-actors.md#global-actor-constrained-generic-parameters

5:01 AM

将来の課題には @T 書ける案あった

1

@swift-5.9.2 let a = (5)

lovee

@swift-5.9.2 let a = (5)

no output

@swift-5.8.1 let a = (5)

lovee

@swift-5.8.1 let a = (5)

no output

@swift-5.0.3 let a = (5)

4:46 AM

@swift-5.4.3 let a = (5)

lovee

@swift-5.4.3 let a = (5)

no output

@swift-4.0.3 let a = (5)

4:48 AM

@swift-5.4.3 let a: Int = (5)

lovee

@swift-5.4.3 let a: Int = (5)

no output

あれ？昔からSingle Element Tuple書けたっけ…？

4:48 AM

@swift-5.1.5 let a = (5)

4:49 AM

@swift-5.2.5 let a = (5)

lovee

@swift-5.2.5 let a = (5)

no output

それはタプルじゃなくて

4:54 AM

式を包んでる丸括弧なのでは

4:54 AM

(1+2)*3と同じ

ああなるほど

5:00 AM

@swift-5.2.5 let a = ("a")

lovee

@swift-5.2.5 let a = ("a")

no output

でもこれでもまだできちゃいますね…昔Single Element Tupleできなかったですよね確か

文字列でも同じですよ数字が特別なわけじゃ無いので (a+b)とか書ける

5:04 AM

単一タプルはできないはできないですどうやると実験できたっけな？可変長ジェネリクスが導入されたことで、1要素タプルも許さないと論理破綻するので緩和されました

可変長ジェネリクスが導入されたことで、1要素タプルも許さないと論理破綻するので緩和されました

なるほどです！

lovee

可変長ジェネリクスが導入されたことで、1要素タプルも許さないと論理破綻するので緩和されました

なるほどです！

ただそれは最近の事なので、↑でやってる5.0とかに対する実験とは関係ないですね

@swift-5.2.5 let a: (String) = ("a")

lovee

@swift-5.2.5 let a: (String) = ("a")

no output

omochimetaru

ただそれは最近の事なので、↑でやってる5.0とかに対する実験とは関係ないですね

え？

む？型は確かにタプルにしかみえないな

5:06 AM

それはなんだろう

@swift-5.9.2 let _: (x: Int)

Yuta Saito

@swift-5.9.2 let _: (x: Int)

exit status: 1 with <stdin>:1:9: error: cannot create a single-element tuple with an element label let _: (x: Int) ^~~

ラベル付きは確か今でもできないです

5:07 AM

ただ昔はラベルなしでもできなかった気がするんですよね…

あれかな

5:08 AM

複数引数関数を受けるところに引数一個のクロージャを渡すとタプル扱いになるやつ

5:09 AM

いや，その場合も1個から1個ならタプルにはならないか。

func something(p: Int, q: Int){} let a = (1, 2) something(a) の話です…？

func foo(_ f: ((Int, Int)) -> Void) {} foo { (x, y) in print(x, y) } ごめん逆だった。タプル１つの関数を受け取るところに、複数引数の関数を渡せる。これは関係ないですね。

ですね、これは書いた時点で複数要素のタップルになるので

5:17 AM

なんかで単一要素のタップル書こうとしてビルドエラーで怒られた記憶があるんですよね…

@swift-5.9.2 print((Int).self)

omochimetaru

@swift-5.9.2 print((Int).self)

Int

型に対するカッコもコンパイル時になかったことになってる感じがするなあ

1

むかーしの記述 https://github.com/apple/swift/blob/9b42d1b273cb6e5554bb717ab31341f1db65689b/include/swift/AST/Expr.h#L121-L125

/// TupleExpr - Parenthesized expressions like '(a=x+x)' and '(x, y, 4)'. Tuple /// types automatically decay if they have a single element, this means that /// single element tuple literals, such as "(4)", will exist in the AST, but /// have a result type that is the same as the input operand type. /// /// When a tuple element is formed with a default value for the type, the /// corresponding SubExpr element will be null. class TupleExpr : public Expr {

1

5:34 AM

できないのはずっとsingle-labeled tupleだけじゃないかなぁ

そういえばSema関連とかでは、単一タプルを剥がして無視する処理をあちこちで見た記憶がある。

5:40 AM

↑にあるようにASTでは生きてるから取り扱う時に無視する。

Yuta Saito

むかーしの記述 https://github.com/apple/swift/blob/9b42d1b273cb6e5554bb717ab31341f1db65689b/include/swift/AST/Expr.h#L121-L125

/// TupleExpr - Parenthesized expressions like '(a=x+x)' and '(x, y, 4)'. Tuple /// types automatically decay if they have a single element, this means that /// single element tuple literals, such as "(4)", will exist in the AST, but /// have a result type that is the same as the input operand type. /// /// When a tuple element is formed with a default value for the type, the /// corresponding SubExpr element will be null. class TupleExpr : public Expr {

なるほど、ラベル付きだけがNGだったんですか

記憶が混乱してたかもですね（なんか社内で自分と同じ記憶の人が他にも何人かいるのでもしやマンデラエフェクト？と言ってるところですw

omochimetaru

式を包んでる丸括弧なのでは

式を囲むかっこも SwiftSyntax 的にはタプルなんですね．

それ意外性ありますよね

3:46 PM

https://github.com/apple/swift/blob/d5ef460aef877a85ea3032a5603f8ab86e1b81f2/include/swift/AST/Expr.h#L2024

swift/include/swift/AST/Expr.h at d5ef460aef877a85ea3032a5603f8ab86...

The Swift Programming Language. Contribute to apple/swift development by creating an account on GitHub.

3:47 PM

ParenExprもあった気がするので検索してみましたが

3:47 PM

ASTにはあるけど、SwiftSyntaxにはなさそう？

1

@swift-5.9.2 import Foundation print(NSTemporaryDirectory())

Iceman

@swift-5.9.2 import Foundation print(NSTemporaryDirectory())

/tmp/

@swift-5.9.2 import Foundation print(FileManager.default.temporaryDirectory.absoluteString)

Iceman

@swift-5.9.2 import Foundation print(FileManager.default.temporaryDirectory.absoluteString)

file:///tmp/

@swift-main @swift-5.9.2

func f<each T>( _ value: repeat each T ) -> (repeat each T) { return (repeat each value) } func g<T>( _ value: T ) -> T { return value } let value: Int? = 2 f(value).unsafelyUnwrapped g(value).unsafelyUnwrapped

(edited)

Iceman

@swift-main @swift-5.9.2

func f<each T>( _ value: repeat each T ) -> (repeat each T) { return (repeat each value) } func g<T>( _ value: T ) -> T { return value } let value: Int? = 2 f(value).unsafelyUnwrapped g(value).unsafelyUnwrapped

(edited)

exit status: 1 with

<stdin>:15:10: error: value of tuple type '(_: Int?)' has no member 'unsafelyUnwrapped' f(value).unsafelyUnwrapped ~~~~~~~~ ^~~~~~~~~~~~~~~~~ <stdin>:16:10: warning: expression of type 'Int' is unused g(value).unsafelyUnwrapped ~~~~~~~~~^~~~~~~~~~~~~~~~~

(edited)

Iceman

@swift-main @swift-5.9.2

func f<each T>( _ value: repeat each T ) -> (repeat each T) { return (repeat each value) } func g<T>( _ value: T ) -> T { return value } let value: Int? = 2 f(value).unsafelyUnwrapped g(value).unsafelyUnwrapped

(edited)

<stdin>:15:10: warning: expression of type 'Int' is unused f(value).unsafelyUnwrapped ~~~~~~~~~^~~~~~~~~~~~~~~~~ <stdin>:16:10: warning: expression of type 'Int' is unused g(value).unsafelyUnwrapped ~~~~~~~~~^~~~~~~~~~~~~~~~~

おお、mainでは直っている

7:19 AM

parameter pack越しで手に入る単一タプルの右辺値に対してメソッドを呼び出せなかった

二つ以上の場合は問題なかったということ？

8:21 AM

一つの場合にタプルにならずに(1要素タプルというものはないから)単一の値になる場合が特別だからロジックがバグってしまったのかな

2つ以上の場合は一度変数などに展開しないとそもそも値を取り出せないので、問題なかった(?)ですね

8:27 AM

1つの場合に特別にする必要があるけど、してなかったという感じ

f(v).1.foo ってタプルチェーンできますよね？

できないです

えっ

@swift-5.9.2 func f<each T>( _ value: repeat each T ) -> (repeat each T) { return (repeat each value) } f(1, 2).0.description

8:29 AM

返ってこないや

8:30 AM

error: value pack expansion can only appear inside a function argument list or tuple elementってなります

1

Iceman

@swift-5.9.2 func f<each T>( _ value: repeat each T ) -> (repeat each T) { return (repeat each value) } f(1, 2).0.description

exit status: 1 with

<stdin>:7:9: error: value pack expansion can only appear inside a function argument list or tuple element f(1, 2).0.description ^

ありゃ？タイムアウトが効いてない？

というよりは、Discord側の通知がめっちゃ遅れてるパターンに見えますね (edited)

ああ、そっちぽい。

Dec 05 04:10:53 swift59-discord-bot web-p9hd9 executeTarget: /usr/bin/env -i PATH\=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin timeout --signal\=KILL 30 swift -

@swift-main @swift-5.9.2 func f() async -> some CustomStringConvertible { return 42 } let r = await f() print(r.description)

Iceman

@swift-main @swift-5.9.2 func f() async -> some CustomStringConvertible { return 42 } let r = await f() print(r.description)

42

@swift-main -enable-upcoming-feature FullTypedThrows enum FooError: Error { case foo } func throwFoo() throws(FooError) { throw .foo }

ジュニア

@swift-main -enable-upcoming-feature FullTypedThrows enum FooError: Error { case foo } func throwFoo() throws(FooError) { throw .foo }

exit status: 1 with

<stdin>:5:23: error: unexpected code '(FooError)' in function func throwFoo() throws(FooError) { ^~~~~~~~~~ <stdin>:1:1: error: new Swift parser generated errors for code that C++ parser accepted enum FooError: Error { ^ <stdin>:5:24: error: typed throws is an experimental feature func throwFoo() throws(FooError) { ^

@swift-main -enable-experimental-feature TypedThrows enum FooError: Error { case foo } func throwFoo() throws(FooError) { throw .foo }

ジュニア

@swift-main -enable-experimental-feature TypedThrows enum FooError: Error { case foo } func throwFoo() throws(FooError) { throw .foo }

no output

@swift-main -enable-experimental-feature TypedThrows

enum FooError: Error { case foo } func throwFoo() throws(FooError) { throw .foo } func nonThrowing1() { do { try throwFoo() } catch { switch error { case .foo: break } } } func nonThrowing2() { do { try throwFoo() } catch .foo { } }

ジュニア

@swift-main -enable-experimental-feature TypedThrows

enum FooError: Error { case foo } func throwFoo() throws(FooError) { throw .foo } func nonThrowing1() { do { try throwFoo() } catch { switch error { case .foo: break } } } func nonThrowing2() { do { try throwFoo() } catch .foo { } }

exit status: 1 with

<stdin>:22:9: error: errors thrown from here are not handled because the enclosing catch is not exhaustive try throwFoo() ^

1

これは 1 はOKで2がError?

ぽいですね

3:40 AM

@swift-main -enable-experimental-feature TypedThrows

enum FooError: Error { case foo } func throwFoo() throws(FooError) { throw .foo } func nonThrowing1() { do { try throwFoo() } catch { switch error { case .foo: break } } }

ジュニア

@swift-main -enable-experimental-feature TypedThrows

enum FooError: Error { case foo } func throwFoo() throws(FooError) { throw .foo } func nonThrowing1() { do { try throwFoo() } catch { switch error { case .foo: break } } }

no output

2の書き方で catch-case 列挙できたら良さそうだけど

1

3:40 AM

プロポーザルどうなってたっけ

catchがconditionalだと網羅チェックしてくれないとは書いてたんですが、catch .fooとかも一律でだめということですかね https://github.com/apple/swift-evolution/blob/main/proposals/0413-typed-throws.md

Note that the only way to write an exhaustive do...catch statement is to have an unconditional catch block. The dynamic checking provided by is or as patterns in the catch block cannot be used to make a catch exhaustive, even if the type specified is the same as the type thrown from the body of the do

swift-evolution/proposals/0413-typed-throws.md at main · apple/swif...

This maintains proposals for changes and user-visible enhancements to the Swift Programming Language. - apple/swift-evolution

ほんとだ、書いてあるけど、理由がよくわからない

4:06 AM

Note: Exhaustiveness checking in the general is expensive at compile time, and the existing language uses the presence of an unconditional catch block as the indicator for an exhaustive do...catch

4:06 AM

既存言語仕様だと網羅チェックの前に全catch するから・・？

1

@swift-5.9.2

struct MyError: Error {} func canThrow() throws { throw MyError() }; protocol SomeRandomProtocol {} do { try canThrow() } catch let error where error is SomeRandomProtocol, { print("SomeRandomProtocol: \(error)") } catch { print("Default: \(error)") }

(edited)

@swift-5.9.2 struct MySet<Element: Hashable> {} struct MyArray<Element> { func set() -> MySet<Element> { .init() } }

ジュニア

@swift-5.9.2 struct MySet<Element: Hashable> {} struct MyArray<Element> { func set() -> MySet<Element> { .init() } }

exit status: 1 with <stdin>:5:19: error: type 'Element' does not conform to protocol 'Hashable' func set() -> MySet<Element> { ^

@swift-5.9.2

protocol P {} struct MySet<Element: Hashable> {} struct MyArray<Element> { func set() -> MySet<Element> where Element: P { .init() } }

ジュニア

@swift-5.9.2

protocol P {} struct MySet<Element: Hashable> {} struct MyArray<Element> { func set() -> MySet<Element> where Element: P { .init() } }

no output

1

@swift-5.9.2

protocol P {} struct MySet<Element: Hashable> {} struct MyArray<Element> { func set() -> MySet<Element> where Element: P { .init() } } class NonHashable {} func foo() { let array = MyArray<NonHashable>() array.set() }

ジュニア

@swift-5.9.2

protocol P {} struct MySet<Element: Hashable> {} struct MyArray<Element> { func set() -> MySet<Element> where Element: P { .init() } } class NonHashable {} func foo() { let array = MyArray<NonHashable>() array.set() }

exit status: 1 with

<stdin>:16:11: error: instance method 'set()' requires that 'NonHashable' conform to 'Hashable' array.set() ^ <stdin>:7:10: note: where 'Element' = 'NonHashable' func set() -> MySet<Element> where Element: P { ^ <stdin>:16:11: error: instance method 'set()' requires that 'NonHashable' conform to 'P' array.set() ^ <stdin>:7:10: note: where 'Element' = 'NonHashable' func set() -> MySet<Element> where Element: P { ^

where Element: Pを付けたら暗黙的にElement: Hashableも付く…？

そうなんですよね

6:52 AM

最初からなのかどうかは知りませんが、自明な制約については利用側で宣言してなくても付与できる余地があれば暗黙的に付与されます

1

これ MySet<T> の T への制約が <Element> を MySetに入れてることで引っ張り出されてますね

11:05 AM

バグじゃなくてそういうシステムだと思う

暗黙的に制約がつくのはまだ分かるものの、where句の有無で挙動が変わるのが不思議です

メソッドのwhereは

11:07 AM

extension MyArray where Element: ... { } のsugarみたいなものだからですね

11:07 AM

ジェネリックコンテキストっていうスコープみたいなものが struct宣言とは別に生成されているので

11:08 AM

型パラメータが束縛されていない

11:09 AM

whereがない場合はコンテキストが2回層なのでメソッドの定義が外側にある本当の型パラメータには影響しない

11:10 AM

挙動に一貫性がなくてわかりにくいですねこれ

「コンテキストが2階層」というのが理解できてないのですが、

whereがあるとextension MyArray where Element: ...のようなコンテキストが生成されて、そこにMySet由来のElement: Hashableも含まれる
whereがないとコンテキストが生成されないのでMyArrayのElementに影響しない

ということでしょうか？ (edited)

Genericsの宣言位置が直接の場合は型パラの制約が自動で付きますが、階層が異なる場合は推論できないですね。なので、以下のコードは通ると思います。 func globalFunc<E>(myArray: MyArray<E>) -> MySet<E> 階層が異なるというのは、推論が必要となる関数の外側のスコープでGenericsが宣言されてる場合ですね。例示していただいてるコードの通らない方は、まさにその例です。

あーーなるほど！！理解できました、お二方ともありがとうございます！

タルノンが書いてくれたとおりです。型パラメータが導入されるところでジェネリックコンテキストが作られて、そのパラメータの制約も定義される。 whereの場合はextension宣言がジェネリックコンテキストを作りつつ、自身の型パラメータも再定義されるのでひとまとめに解かれる whereの無い場合だとstruct宣言がつくるジェネリックコンテキストとパラメータについては既に確定していて、メソッド呼び出しのところではもう固定されてるのでエラーとなる。後者のケースはメソッドで新たにfuncで型パラメータを導入すれば、ジェネリックコンテキストが2階層の形になる。 (edited)

1

1

@swift-main

func withMemoryCSVWriter<each T: LosslessStringConvertible>( headers: repeat (String, (each T).Type), task: (_ emit: (_ row: (repeat each T)) throws -> () ) throws -> () ) throws { var arrayHeaders: [String] = [] repeat arrayHeaders.append((each headers).0) print(arrayHeaders) try task { (_ row: (repeat each T)) in var arrayRow: [String] = [] repeat arrayRow.append((each row).description) print(arrayRow) } } try withMemoryCSVWriter(headers: ("aaa", Int.self), ("iii", String.self) ) { (emit) in try emit((1, "hello")) }

Iceman

@swift-main

func withMemoryCSVWriter<each T: LosslessStringConvertible>( headers: repeat (String, (each T).Type), task: (_ emit: (_ row: (repeat each T)) throws -> () ) throws -> () ) throws { var arrayHeaders: [String] = [] repeat arrayHeaders.append((each headers).0) print(arrayHeaders) try task { (_ row: (repeat each T)) in var arrayRow: [String] = [] repeat arrayRow.append((each row).description) print(arrayRow) } } try withMemoryCSVWriter(headers: ("aaa", Int.self), ("iii", String.self) ) { (emit) in try emit((1, "hello")) }

exit status: 139 with

<unknown>:0: error: INTERNAL ERROR: feature not implemented: reabstraction of pack values Stack dump: 0. Program arguments: /usr/bin/swift-frontend -frontend -interpret - -disable-objc-interop -new-driver-path /usr/bin/swift-driver -empty-abi-descriptor -resource-dir /usr/lib/swift -module-name main -plugin-path /usr/lib/swift/host/plugins -plugin-path /usr/local/lib/swift/host/plugins

stderr.log

11.91 KB

@swift-main

func withMemoryCSVWriter<each T: LosslessStringConvertible>( headers: repeat (String, (each T).Type), task: (_ emit: (_ row: repeat each T) throws -> () ) throws -> () ) throws { var arrayHeaders: [String] = [] repeat arrayHeaders.append((each headers).0) print(arrayHeaders) try task { (_ row: repeat each T) in var arrayRow: [String] = [] repeat arrayRow.append((each row).description) print(arrayRow) } } try withMemoryCSVWriter(headers: ("aaa", Int.self), ("iii", String.self) ) { (emit: (Int, String) throws -> ()) in try emit(1, "hello") }

Iceman

@swift-main

func withMemoryCSVWriter<each T: LosslessStringConvertible>( headers: repeat (String, (each T).Type), task: (_ emit: (_ row: repeat each T) throws -> () ) throws -> () ) throws { var arrayHeaders: [String] = [] repeat arrayHeaders.append((each headers).0) print(arrayHeaders) try task { (_ row: repeat each T) in var arrayRow: [String] = [] repeat arrayRow.append((each row).description) print(arrayRow) } } try withMemoryCSVWriter(headers: ("aaa", Int.self), ("iii", String.self) ) { (emit: (Int, String) throws -> ()) in try emit(1, "hello") }

["aaa", "iii"] ["1", "hello"]

1要素タプルで囲うとクロージャ引数に型アノテーションいらなくなるけど、代わりにコンパイラがクラッシュしてしまう。タプルで囲わない場合は素直に動くけど型アノテーションがめんどう。

@swift-5.2.5 @swift-5.3.3 @swift-5.4.3 @swift-5.5.3 @swift-5.6.3 @swift-5.7.3 @swift-5.8.1 @swift-5.9.2 @swift-5.10.1 @swift-main -version

norio_nomura

@swift-5.2.5 @swift-5.3.3 @swift-5.4.3 @swift-5.5.3 @swift-5.6.3 @swift-5.7.3 @swift-5.8.1 @swift-5.9.2 @swift-5.10.1 @swift-main -version

Swift version 5.9.2 (swift-5.9.2-RELEASE) Target: x86_64-unknown-linux-gnu

norio_nomura

@swift-5.2.5 @swift-5.3.3 @swift-5.4.3 @swift-5.5.3 @swift-5.6.3 @swift-5.7.3 @swift-5.8.1 @swift-5.9.2 @swift-5.10.1 @swift-main -version

Swift version 5.5.3 (swift-5.5.3-RELEASE) Target: x86_64-unknown-linux-gnu

norio_nomura

@swift-5.2.5 @swift-5.3.3 @swift-5.4.3 @swift-5.5.3 @swift-5.6.3 @swift-5.7.3 @swift-5.8.1 @swift-5.9.2 @swift-5.10.1 @swift-main -version

Swift version 5.6.3 (swift-5.6.3-RELEASE) Target: x86_64-unknown-linux-gnu

norio_nomura

@swift-5.2.5 @swift-5.3.3 @swift-5.4.3 @swift-5.5.3 @swift-5.6.3 @swift-5.7.3 @swift-5.8.1 @swift-5.9.2 @swift-5.10.1 @swift-main -version

Swift version 5.2.5 (swift-5.2.5-RELEASE) Target: x86_64-unknown-linux-gnu

norio_nomura

@swift-5.2.5 @swift-5.3.3 @swift-5.4.3 @swift-5.5.3 @swift-5.6.3 @swift-5.7.3 @swift-5.8.1 @swift-5.9.2 @swift-5.10.1 @swift-main -version

Swift version 5.7.3 (swift-5.7.3-RELEASE) Target: x86_64-unknown-linux-gnu

norio_nomura

@swift-5.2.5 @swift-5.3.3 @swift-5.4.3 @swift-5.5.3 @swift-5.6.3 @swift-5.7.3 @swift-5.8.1 @swift-5.9.2 @swift-5.10.1 @swift-main -version

Swift version 5.4.3 (swift-5.4.3-RELEASE) Target: x86_64-unknown-linux-gnu

norio_nomura

@swift-5.2.5 @swift-5.3.3 @swift-5.4.3 @swift-5.5.3 @swift-5.6.3 @swift-5.7.3 @swift-5.8.1 @swift-5.9.2 @swift-5.10.1 @swift-main -version

Swift version 5.3.3 (swift-5.3.3-RELEASE) Target: x86_64-unknown-linux-gnu

norio_nomura

@swift-5.2.5 @swift-5.3.3 @swift-5.4.3 @swift-5.5.3 @swift-5.6.3 @swift-5.7.3 @swift-5.8.1 @swift-5.9.2 @swift-5.10.1 @swift-main -version

Swift version 5.8.1 (swift-5.8.1-RELEASE) Target: x86_64-unknown-linux-gnu

norio_nomura

@swift-5.2.5 @swift-5.3.3 @swift-5.4.3 @swift-5.5.3 @swift-5.6.3 @swift-5.7.3 @swift-5.8.1 @swift-5.9.2 @swift-5.10.1 @swift-main -version

Swift version 5.10-dev (LLVM e8e5be8d5b39f46, Swift 935dc3eae905669) Target: x86_64-unknown-linux-gnu

norio_nomura

@swift-5.2.5 @swift-5.3.3 @swift-5.4.3 @swift-5.5.3 @swift-5.6.3 @swift-5.7.3 @swift-5.8.1 @swift-5.9.2 @swift-5.10.1 @swift-main -version

Swift version 5.11-dev (LLVM 13124099c3f0229, Swift d6871edc839adec) Target: x86_64-unknown-linux-gnu

ログを見ると、全てのボットインスタンスが一斉にメッセージを受け取ってる。Renderのデータセンターから外へ出る経路に透過プロキシぽいのがいて、そいつが一斉にメッセージを流した様な挙動に見える。

@swift-main

import Dispatch protocol P {} extension Int: P {} func useP(_ p: some P) {} struct S: P { init(@SBuilder builder: () -> [any P]) { self.ps = builder() } var ps: [any P] } @resultBuilder struct SBuilder { static func buildBlock(_ components: (any P)...) -> [any P] { components } } extension P where Self == S { static func s(@SBuilder builder: () -> [any P]) -> S { S(builder: builder) } } func main() { // これはできる useP(S { 1 2 3 }) // これはできない useP(.s { 1 2 3 }) }

omochimetaru

@swift-main

import Dispatch protocol P {} extension Int: P {} func useP(_ p: some P) {} struct S: P { init(@SBuilder builder: () -> [any P]) { self.ps = builder() } var ps: [any P] } @resultBuilder struct SBuilder { static func buildBlock(_ components: (any P)...) -> [any P] { components } } extension P where Self == S { static func s(@SBuilder builder: () -> [any P]) -> S { S(builder: builder) } } func main() { // これはできる useP(S { 1 2 3 }) // これはできない useP(.s { 1 2 3 }) }

exit status: 1 with

<stdin>:38:9: warning: integer literal is unused 1 ^ <stdin>:39:9: warning: integer literal is unused 2 ^ <stdin>:40:9: warning: integer literal is unused 3 ^ <stdin>:41:5: error: missing return in closure expected to return '[any P]' }) ^

これなんで？そういうもんだっけ？ SwiftUIで似たようなAPIがあるような気がするのだが、ないんだっけ。

7:26 AM

https://developer.apple.com/documentation/swiftui/shape/rect(cornerradii:style:)

7:26 AM

こういう、プロトコルのドット式にするインターフェースで、かつ、ViewBuilderを引数に取っていると、同じ状況だと思うんだけど。（この rect の例は、ViewBuilderを引数に取ってない)

@swift-main

protocol P {} extension Int: P {} func useP(_ p: some P) {} struct S: P { init(builder: () -> ()) { } } extension P where Self == S { static func s(builder: () -> ()) -> Self { S(builder: builder) } } func main() { useP(S { 1 2 3 }) useP(.s { 1 2 3 }) }

(チェーンじゃないけど)SE-0287 と SE-0299 (と result builder) が組み合わさったときにうまくいかないのですね。 https://github.com/apple/swift-evolution/blob/97c3e1d35ab217d7627e1e601fff5c4b33c17ef8/proposals/0287-implicit-member-chains.md?plain=1#L118-L128

This proposal would provide the model mentioned earlier for implicit member expressions: anywhere that a contextual type T can be inferred, writing

.member1.member2.(...).memberN Will behave as if the user had written: T.member1.member2.(...).memberN https://github.com/apple/swift-evolution/blob/97c3e1d35ab217d7627e1e601fff5c4b33c17ef8/proposals/0299-extend-generic-static-member-lookup.md?plain=1#L199-L203 Toggle("Wi-Fi", isOn: $isWiFiEnabled) .toggleStyle(.switch)

In the case of .toggleStyle(.switch), the reference to the member .switch is re-written to be SwitchToggleStyle.switch in the type-checked AST.

というわけで、おもちさんの例だと S.s { ... } と書いたときと同等に動くべきと読めるので、バグで良いと思います。 (edited)

報告するか〜

10:36 PM

エラーの内容の感じ0299は普通に機能してて、なぜかResultBuilderが無かったようにただのクロージャの扱いになってる風不思議

そうですね。 ConstraintSystem::resolveClosure() から呼ばれるはずのConstraintSystem::matchResultBuilder() が何らかの理由で呼ばれてないみたい。 (edited)

報告した https://github.com/apple/swift/issues/70649

Result Builder is ignored when calling a protocol's static member w...

Description The Result Builder is being ignored when invoking a protocol's static member using dot expression. Reproduction Below is the reproduction code. First, the setup: protocol P {} exten...

@swift-5.10.1

Task { print("Task.isCancelled:", Task.isCancelled) await withTaskCancellationHandler { print("work") } onCancel: { print("onCancel") } }.cancel()

Iceman

@swift-5.10.1

Task { print("Task.isCancelled:", Task.isCancelled) await withTaskCancellationHandler { print("work") } onCancel: { print("onCancel") } }.cancel()

Task.isCancelled: true onCancel work

withTaskCancellationHandler、キャンセル状態でこれに入ったら先にキャンセルしてから中が実行される

2:18 AM

/// ### Already cancelled tasks /// When `withTaskCancellationHandler` is used in a `Task` that has already been cancelled, /// the `onCancel` cancellation ``handler`` will be executed immediately before operation gets /// to execute. This allows the cancellation handler to set some external "cancelled" flag that the /// operation may be *atomically* checking for in order to avoid performing any actual work once /// the operation gets to run.

2:18 AM

コード中コメントにも書いてあった

うおー知らんかった　考慮漏れしたことあるかもしれん怖

7:20 AM

あー、 Task.checkCancellation() 呼んでれば結局大丈夫なことが多そう

withTaskCancellationHandlerの前にそれ呼んでおけば安心ですね

executed immediatelyだから中じゃなくて前でいいのか。

@swift-5.10.1 class TableView { protocol Delegate: AnyObject { func tableView(_: TableView, didSelectRowAtIndex: Int) } }

5.10からprotocolもネストできるようになるんです！？？

なるね

12:50 PM

https://github.com/apple/swift-evolution/blob/main/proposals/0404-nested-protocols.md

swift-evolution/proposals/0404-nested-protocols.md at main · apple/...

This maintains proposals for changes and user-visible enhancements to the Swift Programming Language. - apple/swift-evolution

1

お、Delegateめっちゃ定義しやすくなるじゃないか！

デリゲート定義・・・する？クロージャ複数でよくないっすか

まあクロージャもいいですが、ものによってはデリゲートの方が読みやすい場合あるじゃん？

まあそういうときに嬉しいですねだいたいFooDelegateって名前になるし

1

nanasi

@swift-5.10.1 class TableView { protocol Delegate: AnyObject { func tableView(_: TableView, didSelectRowAtIndex: Int) } }

no output

enum で namespace 的にまとめたりしているときに protocol も中に定義できて嬉しいですね

@swift-5.9.2 print("hello")

Iceman

@swift-5.9.2 print("hello")

hello

@swift-5.9.2 import Foundation print(NSDecimalNumber.self) (edited)

Iceman

@swift-5.9.2 import Foundation print(NSDecimalNumber.self) (edited)

NSDecimalNumber (edited)

@swift-main -enable-upcoming-feature RetroactiveAttribute import Foundation extension Date: Identifiable {}

Iceman

@swift-main -enable-upcoming-feature RetroactiveAttribute import Foundation extension Date: Identifiable {}

exit status: 1 with

<stdin>:2:1: warning: extension declares a conformance of imported type 'Date' to imported protocol 'Identifiable'; this will not behave correctly if the owners of 'Foundation' introduce this conformance in the future extension Date: Identifiable {} ^ <stdin>:2:1: note: add '@retroactive' to silence this warning extension Date: Identifiable {} ^ ~~~~~~~~~~~~ @retroactive Identifiable <stdin>:2:1: error: type 'Date' does not conform to protocol 'Identifiable' extension Date: Identifiable {} ^ Swift.Identifiable:3:16: note: candidate would match if 'Date' conformed to 'AnyObject' public var id: ObjectIdentifier { get } ^ Swift.Identifiable:4:9: note: protocol requires property 'id' with type 'ObjectIdentifier' var id: Self.ID { get } ^

@swift-main import Foundation extension Date: Identifiable {}

Iceman

@swift-main import Foundation extension Date: Identifiable {}

exit status: 1 with

<stdin>:2:1: warning: extension declares a conformance of imported type 'Date' to imported protocol 'Identifiable'; this will not behave correctly if the owners of 'Foundation' introduce this conformance in the future extension Date: Identifiable {} ^ <stdin>:2:1: note: add '@retroactive' to silence this warning extension Date: Identifiable {} ^ ~~~~~~~~~~~~ @retroactive Identifiable <stdin>:2:1: error: type 'Date' does not conform to protocol 'Identifiable' extension Date: Identifiable {} ^ Swift.Identifiable:3:16: note: candidate would match if 'Date' conformed to 'AnyObject' public var id: ObjectIdentifier { get } ^ Swift.Identifiable:4:9: note: protocol requires property 'id' with type 'ObjectIdentifier' var id: Self.ID { get } ^

@retroactiveの警告はデフォルトで有効なんだ

ボットは一つの投稿に複数メンションを入れれば複数回起動できます。改行すれば違うオプションも渡せます。 @swift-5.10.1 -version @swift-5.10.1 -help (edited)

1

norio_nomura

ボットは一つの投稿に複数メンションを入れれば複数回起動できます。改行すれば違うオプションも渡せます。 @swift-5.10.1 -version @swift-5.10.1 -help (edited)

swift -version Swift version 5.10-dev (LLVM 7c3b53ecaad54fb, Swift d7111290a279135) Target: x86_64-unknown-linux-gnu (edited)

norio_nomura

ボットは一つの投稿に複数メンションを入れれば複数回起動できます。改行すれば違うオプションも渡せます。 @swift-5.10.1 -version @swift-5.10.1 -help (edited)

swift -help OVERVIEW: Swift compiler USAGE: swift (edited)

stdout.log

14.14 KB

入力は共通になるので、最適化の有無やfeatureのオンオフで違いが出るかのチェックに使うことを想定してます。

11:49 PM

少し前までボットへのメッセージ到達が不安定だったけど、最近は治ったぽいかな？

おお、そんなことができたんですね。便利

@swift-5.10.1 @swift-5.10.1 -enable-experimental-feature AvailabilityMacro="SwiftStdlib 5.10:macOS 14.4, iOS 17.4, watchOS 10.4, tvOS 17.4" @swift-5.10.1 -Xfrontend -define-availability -Xfrontend "SwiftStdlib 5.10:macOS 14.4, iOS 17.4, watchOS 10.4, tvOS 17.4" @available(SwiftStdlib 5.10, *) func f() {} (edited)

norio_nomura

@swift-5.10.1 @swift-5.10.1 -enable-experimental-feature AvailabilityMacro="SwiftStdlib 5.10:macOS 14.4, iOS 17.4, watchOS 10.4, tvOS 17.4" @swift-5.10.1 -Xfrontend -define-availability -Xfrontend "SwiftStdlib 5.10:macOS 14.4, iOS 17.4, watchOS 10.4, tvOS 17.4" @available(SwiftStdlib 5.10, *) func f() {} (edited)

swift - <stdin>:1:12: warning: unrecognized platform name 'SwiftStdlib' @available(SwiftStdlib 5.10, *) ^ (edited)

norio_nomura

@swift-5.10.1 @swift-5.10.1 -enable-experimental-feature AvailabilityMacro="SwiftStdlib 5.10:macOS 14.4, iOS 17.4, watchOS 10.4, tvOS 17.4" @swift-5.10.1 -Xfrontend -define-availability -Xfrontend "SwiftStdlib 5.10:macOS 14.4, iOS 17.4, watchOS 10.4, tvOS 17.4" @available(SwiftStdlib 5.10, *) func f() {} (edited)

swift -enable-experimental-feature AvailabilityMacro\=SwiftStdlib\ 5.10:macOS\ 14.4,\ iOS\ 17.4,\ watchOS\ 10.4,\ tvOS\ 17.4 -

no output (edited)

norio_nomura

@swift-5.10.1 @swift-5.10.1 -enable-experimental-feature AvailabilityMacro="SwiftStdlib 5.10:macOS 14.4, iOS 17.4, watchOS 10.4, tvOS 17.4" @swift-5.10.1 -Xfrontend -define-availability -Xfrontend "SwiftStdlib 5.10:macOS 14.4, iOS 17.4, watchOS 10.4, tvOS 17.4" @available(SwiftStdlib 5.10, *) func f() {} (edited)

swift -Xfrontend -define-availability -Xfrontend SwiftStdlib\ 5.10:macOS\ 14.4,\ iOS\ 17.4,\ watchOS\ 10.4,\ tvOS\ 17.4 -

no output

@swift-main @swift-5.10.1 @swift-5.9.2 -enable-experimental-feature StrictConcurrency -enable-experimental-feature RegionBasedIsolation

final class NonSendable { var a = 1 func mutate() { a += 1 } } @MainActor func setMainActorState(_ x: NonSendable?) {} func main() async { let ns = await withCheckedContinuation { continuation in Task { @MainActor in let ns = NonSendable() continuation.resume(returning: ns) setMainActorState(ns) } } ns.mutate() }

(edited)

omochimetaru

@swift-main @swift-5.10.1 @swift-5.9.2 -enable-experimental-feature StrictConcurrency -enable-experimental-feature RegionBasedIsolation

final class NonSendable { var a = 1 func mutate() { a += 1 } } @MainActor func setMainActorState(_ x: NonSendable?) {} func main() async { let ns = await withCheckedContinuation { continuation in Task { @MainActor in let ns = NonSendable() continuation.resume(returning: ns) setMainActorState(ns) } } ns.mutate() }

(edited)

no output (edited)

omochimetaru

@swift-main @swift-5.10.1 @swift-5.9.2 -enable-experimental-feature StrictConcurrency -enable-experimental-feature RegionBasedIsolation

final class NonSendable { var a = 1 func mutate() { a += 1 } } @MainActor func setMainActorState(_ x: NonSendable?) {} func main() async { let ns = await withCheckedContinuation { continuation in Task { @MainActor in let ns = NonSendable() continuation.resume(returning: ns) setMainActorState(ns) } } ns.mutate() }

(edited)

no output (edited)

omochimetaru

@swift-main @swift-5.10.1 @swift-5.9.2 -enable-experimental-feature StrictConcurrency -enable-experimental-feature RegionBasedIsolation

final class NonSendable { var a = 1 func mutate() { a += 1 } } @MainActor func setMainActorState(_ x: NonSendable?) {} func main() async { let ns = await withCheckedContinuation { continuation in Task { @MainActor in let ns = NonSendable() continuation.resume(returning: ns) setMainActorState(ns) } } ns.mutate() }

(edited)

no output (edited)

わからん

@swift-main @swift-5.9.2 @swift-5.10.1 func f() throws -> String { "" } let _ = try switch f() { default: "" }

Iceman

@swift-main @swift-5.9.2 @swift-5.10.1 func f() throws -> String { "" } let _ = try switch f() { default: "" }

<stdin>:2:20: warning: call can throw but is not marked with 'try'; this is an error in Swift 6 let _ = try switch f() { ^~~ <stdin>:2:20: note: did you mean to use 'try'? let _ = try switch f() { ^ try <stdin>:2:20: note: did you mean to handle error as optional value? let _ = try switch f() { ^ try? <stdin>:2:20: note: did you mean to disable error propagation? let _ = try switch f() { ^ try! <stdin>:2:9: warning: 'try' has no effect on 'switch' expression let _ = try switch f() { ^~~

Iceman

@swift-main @swift-5.9.2 @swift-5.10.1 func f() throws -> String { "" } let _ = try switch f() { default: "" }

<stdin>:2:20: warning: call can throw but is not marked with 'try'; this is an error in Swift 6 1 │ func f() throws -> String { "" } 2 │ let _ = try switch f() { │ ├─ warning: call can throw but is not marked with 'try'; this is an error in Swift 6 │ ├─ note: did you mean to use 'try'? │ ├─ note: did you mean to handle error as optional value? │ ╰─ note: did you mean to disable error propagation? 3 │ default: "" 4 │ } <stdin>:2:9: warning: 'try' has no effect on 'switch' expression 1 │ func f() throws -> String { "" } 2 │ let _ = try switch f() { │ ╰─ warning: 'try' has no effect on 'switch' expression 3 │ default: "" 4 │ }

Iceman

@swift-main @swift-5.9.2 @swift-5.10.1 func f() throws -> String { "" } let _ = try switch f() { default: "" }

no output

switch式の右側に書かないといけんのか

mainだと同じ場所へのエラーがまとまって見やすくなりましたね

swift-5.10-RELEASEへ更新したけどオンラインにならなくて調べたら、全てのボットでメッセージを受け取れてないみたい。 @swift-5.2.5 @swift-5.3.3 @swift-5.4.3 @swift55 @swift-5.6.3 @swift-5.7.3 @swift-5.8.1 @swift-5.9.2 @swift-5.10.1 @swift-main -version

norio_nomura

swift-5.10-RELEASEへ更新したけどオンラインにならなくて調べたら、全てのボットでメッセージを受け取れてないみたい。 @swift-5.2.5 @swift-5.3.3 @swift-5.4.3 @swift55 @swift-5.6.3 @swift-5.7.3 @swift-5.8.1 @swift-5.9.2 @swift-5.10.1 @swift-main -version

exit status: 2 with error: unable to invoke subcommand: /usr/bin/swift-<@&887546264059797525> (No such file or directory)

norio_nomura

swift-5.10-RELEASEへ更新したけどオンラインにならなくて調べたら、全てのボットでメッセージを受け取れてないみたい。 @swift-5.2.5 @swift-5.3.3 @swift-5.4.3 @swift55 @swift-5.6.3 @swift-5.7.3 @swift-5.8.1 @swift-5.9.2 @swift-5.10.1 @swift-main -version

exit status: 2 with error: unable to invoke subcommand: /usr/bin/swift-<@&887546264059797525> (No such file or directory)

norio_nomura

swift-5.10-RELEASEへ更新したけどオンラインにならなくて調べたら、全てのボットでメッセージを受け取れてないみたい。 @swift-5.2.5 @swift-5.3.3 @swift-5.4.3 @swift55 @swift-5.6.3 @swift-5.7.3 @swift-5.8.1 @swift-5.9.2 @swift-5.10.1 @swift-main -version

exit status: 2 with error: unable to invoke subcommand: /usr/bin/swift-<@&887546264059797525> (No such file or directory)

norio_nomura

swift-5.10-RELEASEへ更新したけどオンラインにならなくて調べたら、全てのボットでメッセージを受け取れてないみたい。 @swift-5.2.5 @swift-5.3.3 @swift-5.4.3 @swift55 @swift-5.6.3 @swift-5.7.3 @swift-5.8.1 @swift-5.9.2 @swift-5.10.1 @swift-main -version

Swift version 5.6.3 (swift-5.6.3-RELEASE) Target: x86_64-unknown-linux-gnu

norio_nomura

swift-5.10-RELEASEへ更新したけどオンラインにならなくて調べたら、全てのボットでメッセージを受け取れてないみたい。 @swift-5.2.5 @swift-5.3.3 @swift-5.4.3 @swift55 @swift-5.6.3 @swift-5.7.3 @swift-5.8.1 @swift-5.9.2 @swift-5.10.1 @swift-main -version

Swift version 5.7.3 (swift-5.7.3-RELEASE) Target: x86_64-unknown-linux-gnu

norio_nomura

swift-5.10-RELEASEへ更新したけどオンラインにならなくて調べたら、全てのボットでメッセージを受け取れてないみたい。 @swift-5.2.5 @swift-5.3.3 @swift-5.4.3 @swift55 @swift-5.6.3 @swift-5.7.3 @swift-5.8.1 @swift-5.9.2 @swift-5.10.1 @swift-main -version

Swift version 5.8.1 (swift-5.8.1-RELEASE) Target: x86_64-unknown-linux-gnu

norio_nomura

swift-5.10-RELEASEへ更新したけどオンラインにならなくて調べたら、全てのボットでメッセージを受け取れてないみたい。 @swift-5.2.5 @swift-5.3.3 @swift-5.4.3 @swift55 @swift-5.6.3 @swift-5.7.3 @swift-5.8.1 @swift-5.9.2 @swift-5.10.1 @swift-main -version

Swift version 6.0-dev (LLVM 7fe091223bc821e, Swift 92f5eeeefc88005) Target: x86_64-unknown-linux-gnu

norio_nomura

swift-5.10-RELEASEへ更新したけどオンラインにならなくて調べたら、全てのボットでメッセージを受け取れてないみたい。 @swift-5.2.5 @swift-5.3.3 @swift-5.4.3 @swift55 @swift-5.6.3 @swift-5.7.3 @swift-5.8.1 @swift-5.9.2 @swift-5.10.1 @swift-main -version

Swift version 5.9.2 (swift-5.9.2-RELEASE) Target: x86_64-unknown-linux-gnu

@swift-5.9.2 @swift-5.10.1 @swift-main

protocol Controller { associatedtype Deps typealias Routes = GenericRoutes<Self> } struct Request {} protocol Provider { associatedtype ServiceType func provide(for request: Request) throws -> ServiceType } struct GenericRoutes<C: Controller> { public init<P: Provider>( provider: P ) where P.ServiceType == C.Deps { } } struct VariadicProvider< each T: Provider >: Provider { public typealias ServiceType = (repeat (each T).ServiceType) public init(_ providers: repeat each T) { self.providers = (repeat each providers) } public var providers: (repeat each T) public func provide(for request: Request) throws -> ServiceType { return (repeat try (each providers).provide(for: request)) } } protocol DKey { associatedtype Value } struct Dependencies { func get<K: DKey>(_ key: K) -> K.Value { fatalError() } func forRequest<each K: DKey>( _ keys: repeat each K ) -> VariadicProvider<repeat (each K).Value> { return VariadicProvider<repeat (each K).Value>( repeat self.get(each keys) ) } } struct A {} struct B {} struct C {} struct WController: Controller { typealias Deps = (A, B, C) } struct AP: Provider { func provide(for request: Request) throws -> A { fatalError() } } struct BP: Provider { func provide(for request: Request) throws -> B { fatalError() } } struct CP: Provider { func provide(for request: Request) throws -> C { fatalError() } } struct AK: DKey { typealias Value = AP } extension DKey where Self == AK { static var a: AK { AK() } } struct BK: DKey { typealias Value = BP } extension DKey where Self == BK { static var b: BK { BK() } } struct CK: DKey { typealias Value = CP } extension DKey where Self == CK { static var c: CK { CK() } } func main(d: Dependencies) { let vp1: VariadicProvider<AP, BP, CP> = VariadicProvider( d.get(.a), d.get(.b), d.get(.c) ) let r1 = WController.Routes( provider: vp1 ) // write direct vp let r2 = WController.Routes( provider: VariadicProvider( d.get(.a), d.get(.b), d.get(.c) ) ) // build vp from forRequest let vp3: VariadicProvider<AP, BP, CP> = d.forRequest( .a, .b, .c ) let r3 = WController.Routes( provider: vp3 ) // write direct forRequest let r4 = WController.Routes( provider: d.forRequest( .a, .b, .c ) ) }

omochimetaru

@swift-5.9.2 @swift-5.10.1 @swift-main

protocol Controller { associatedtype Deps typealias Routes = GenericRoutes<Self> } struct Request {} protocol Provider { associatedtype ServiceType func provide(for request: Request) throws -> ServiceType } struct GenericRoutes<C: Controller> { public init<P: Provider>( provider: P ) where P.ServiceType == C.Deps { } } struct VariadicProvider< each T: Provider >: Provider { public typealias ServiceType = (repeat (each T).ServiceType) public init(_ providers: repeat each T) { self.providers = (repeat each providers) } public var providers: (repeat each T) public func provide(for request: Request) throws -> ServiceType { return (repeat try (each providers).provide(for: request)) } } protocol DKey { associatedtype Value } struct Dependencies { func get<K: DKey>(_ key: K) -> K.Value { fatalError() } func forRequest<each K: DKey>( _ keys: repeat each K ) -> VariadicProvider<repeat (each K).Value> { return VariadicProvider<repeat (each K).Value>( repeat self.get(each keys) ) } } struct A {} struct B {} struct C {} struct WController: Controller { typealias Deps = (A, B, C) } struct AP: Provider { func provide(for request: Request) throws -> A { fatalError() } } struct BP: Provider { func provide(for request: Request) throws -> B { fatalError() } } struct CP: Provider { func provide(for request: Request) throws -> C { fatalError() } } struct AK: DKey { typealias Value = AP } extension DKey where Self == AK { static var a: AK { AK() } } struct BK: DKey { typealias Value = BP } extension DKey where Self == BK { static var b: BK { BK() } } struct CK: DKey { typealias Value = CP } extension DKey where Self == CK { static var c: CK { CK() } } func main(d: Dependencies) { let vp1: VariadicProvider<AP, BP, CP> = VariadicProvider( d.get(.a), d.get(.b), d.get(.c) ) let r1 = WController.Routes( provider: vp1 ) // write direct vp let r2 = WController.Routes( provider: VariadicProvider( d.get(.a), d.get(.b), d.get(.c) ) ) // build vp from forRequest let vp3: VariadicProvider<AP, BP, CP> = d.forRequest( .a, .b, .c ) let r3 = WController.Routes( provider: vp3 ) // write direct forRequest let r4 = WController.Routes( provider: d.forRequest( .a, .b, .c ) ) }

exit status: 1 with

<stdin>:125:14: error: initializer 'init(provider:)' requires the types 'WController.Deps' (aka '(A, B, C)') and 'A, B, C' be equivalent let r4 = WController.Routes( ^ <stdin>:15:12: note: where 'C.Deps' = 'WController.Deps' (aka '(A, B, C)'), 'P.ServiceType' = 'A, B, C' public init<P: Provider>( ^

omochimetaru

@swift-5.9.2 @swift-5.10.1 @swift-main

protocol Controller { associatedtype Deps typealias Routes = GenericRoutes<Self> } struct Request {} protocol Provider { associatedtype ServiceType func provide(for request: Request) throws -> ServiceType } struct GenericRoutes<C: Controller> { public init<P: Provider>( provider: P ) where P.ServiceType == C.Deps { } } struct VariadicProvider< each T: Provider >: Provider { public typealias ServiceType = (repeat (each T).ServiceType) public init(_ providers: repeat each T) { self.providers = (repeat each providers) } public var providers: (repeat each T) public func provide(for request: Request) throws -> ServiceType { return (repeat try (each providers).provide(for: request)) } } protocol DKey { associatedtype Value } struct Dependencies { func get<K: DKey>(_ key: K) -> K.Value { fatalError() } func forRequest<each K: DKey>( _ keys: repeat each K ) -> VariadicProvider<repeat (each K).Value> { return VariadicProvider<repeat (each K).Value>( repeat self.get(each keys) ) } } struct A {} struct B {} struct C {} struct WController: Controller { typealias Deps = (A, B, C) } struct AP: Provider { func provide(for request: Request) throws -> A { fatalError() } } struct BP: Provider { func provide(for request: Request) throws -> B { fatalError() } } struct CP: Provider { func provide(for request: Request) throws -> C { fatalError() } } struct AK: DKey { typealias Value = AP } extension DKey where Self == AK { static var a: AK { AK() } } struct BK: DKey { typealias Value = BP } extension DKey where Self == BK { static var b: BK { BK() } } struct CK: DKey { typealias Value = CP } extension DKey where Self == CK { static var c: CK { CK() } } func main(d: Dependencies) { let vp1: VariadicProvider<AP, BP, CP> = VariadicProvider( d.get(.a), d.get(.b), d.get(.c) ) let r1 = WController.Routes( provider: vp1 ) // write direct vp let r2 = WController.Routes( provider: VariadicProvider( d.get(.a), d.get(.b), d.get(.c) ) ) // build vp from forRequest let vp3: VariadicProvider<AP, BP, CP> = d.forRequest( .a, .b, .c ) let r3 = WController.Routes( provider: vp3 ) // write direct forRequest let r4 = WController.Routes( provider: d.forRequest( .a, .b, .c ) ) }

exit status: 1 with

<stdin>:125:14: error: initializer 'init(provider:)' requires the types 'WController.Deps' (aka '(A, B, C)') and 'A, B, C' be equivalent 13 │ 14 │ struct GenericRoutes<C: Controller> { 15 │ public init<P: Provider>( │ ╰─ note: where 'C.Deps' = 'WController.Deps' (aka '(A, B, C)'), 'P.ServiceType' = 'A, B, C' 16 │ provider: P 17 │ ) where P.ServiceType == C.Deps { ┆ 123 │ 124 │ // write direct forRequest 125 │ let r4 = WController.Routes( │ ╰─ error: initializer 'init(provider:)' requires the types 'WController.Deps' (aka '(A, B, C)') and 'A, B, C' be equivalent 126 │ provider: d.forRequest( 127 │ .a, .b, .c

omochimetaru

@swift-5.9.2 @swift-5.10.1 @swift-main

protocol Controller { associatedtype Deps typealias Routes = GenericRoutes<Self> } struct Request {} protocol Provider { associatedtype ServiceType func provide(for request: Request) throws -> ServiceType } struct GenericRoutes<C: Controller> { public init<P: Provider>( provider: P ) where P.ServiceType == C.Deps { } } struct VariadicProvider< each T: Provider >: Provider { public typealias ServiceType = (repeat (each T).ServiceType) public init(_ providers: repeat each T) { self.providers = (repeat each providers) } public var providers: (repeat each T) public func provide(for request: Request) throws -> ServiceType { return (repeat try (each providers).provide(for: request)) } } protocol DKey { associatedtype Value } struct Dependencies { func get<K: DKey>(_ key: K) -> K.Value { fatalError() } func forRequest<each K: DKey>( _ keys: repeat each K ) -> VariadicProvider<repeat (each K).Value> { return VariadicProvider<repeat (each K).Value>( repeat self.get(each keys) ) } } struct A {} struct B {} struct C {} struct WController: Controller { typealias Deps = (A, B, C) } struct AP: Provider { func provide(for request: Request) throws -> A { fatalError() } } struct BP: Provider { func provide(for request: Request) throws -> B { fatalError() } } struct CP: Provider { func provide(for request: Request) throws -> C { fatalError() } } struct AK: DKey { typealias Value = AP } extension DKey where Self == AK { static var a: AK { AK() } } struct BK: DKey { typealias Value = BP } extension DKey where Self == BK { static var b: BK { BK() } } struct CK: DKey { typealias Value = CP } extension DKey where Self == CK { static var c: CK { CK() } } func main(d: Dependencies) { let vp1: VariadicProvider<AP, BP, CP> = VariadicProvider( d.get(.a), d.get(.b), d.get(.c) ) let r1 = WController.Routes( provider: vp1 ) // write direct vp let r2 = WController.Routes( provider: VariadicProvider( d.get(.a), d.get(.b), d.get(.c) ) ) // build vp from forRequest let vp3: VariadicProvider<AP, BP, CP> = d.forRequest( .a, .b, .c ) let r3 = WController.Routes( provider: vp3 ) // write direct forRequest let r4 = WController.Routes( provider: d.forRequest( .a, .b, .c ) ) }

<stdin>:102:9: warning: initialization of immutable value 'r1' was never used; consider replacing with assignment to '_' or removing it let r1 = WController.Routes( ~~~~^~ _ <stdin>:107:9: warning: initialization of immutable value 'r2' was never used; consider replacing with assignment to '_' or removing it let r2 = WController.Routes( ~~~~^~ _ <stdin>:120:9: warning: initialization of immutable value 'r3' was never used; consider replacing with assignment to '_' or removing it let r3 = WController.Routes( ~~~~^~ _ <stdin>:125:9: warning: initialization of immutable value 'r4' was never used; consider replacing with assignment to '_' or removing it let r4 = WController.Routes( ~~~~^~ _

@swift-5.8.1 @swift-5.9.2 struct S { var a = 0 } func foo(_ x: (S) -> Int) {} foo(\.a)

omochimetaru

@swift-5.8.1 @swift-5.9.2 struct S { var a = 0 } func foo(_ x: (S) -> Int) {} foo(\.a)

no output

omochimetaru

@swift-5.8.1 @swift-5.9.2 struct S { var a = 0 } func foo(_ x: (S) -> Int) {} foo(\.a)

no output

@swift-5.8.1 struct S { var a = 0 } func foo(_ x: ((S) -> Int)? = nil) {} foo(\.a)

omochimetaru

@swift-5.8.1 struct S { var a = 0 } func foo(_ x: ((S) -> Int)? = nil) {} foo(\.a)

exit status: 1 with

<stdin>:7:5: error: cannot convert value of type '_' to expected argument type '((S) -> Int)?' foo(\.a) ^ <stdin>:7:5: error: cannot infer key path type from context; consider explicitly specifying a root type foo(\.a) ^ <#Root#>

なにーっ！？

7:49 AM

@swift-5.9.2 @swift-5.10.1 struct S { var a = 0 } func foo(_ x: ((S) -> Int)? = nil) {} foo(\.a)

omochimetaru

@swift-5.9.2 @swift-5.10.1 struct S { var a = 0 } func foo(_ x: ((S) -> Int)? = nil) {} foo(\.a)

exit status: 1 with

<stdin>:7:5: error: cannot convert value of type '_' to expected argument type '((S) -> Int)?' foo(\.a) ^ <stdin>:7:5: error: cannot infer key path type from context; consider explicitly specifying a root type foo(\.a) ^ <#Root#>

omochimetaru

@swift-5.9.2 @swift-5.10.1 struct S { var a = 0 } func foo(_ x: ((S) -> Int)? = nil) {} foo(\.a)

no output

https://github.com/apple/swift-evolution/blob/main/proposals/0416-keypath-function-subtyping.md これって0416が必要なの？

swift-evolution/proposals/0416-keypath-function-subtyping.md at mai...

This maintains proposals for changes and user-visible enhancements to the Swift Programming Language. - apple/swift-evolution

7:50 AM

でもこれSwift6.0からって書いてあるんだよな

@swift-main

@MainActor func doSomething() async { await withUnsafeContinuation { continuation in if #available(macOS 14.0, *) { MainActor.shared.assertIsolated() } continuation.resume(returning: ()) } } await Task.detached { await doSomething() }.value

kntk

@swift-main

@MainActor func doSomething() async { await withUnsafeContinuation { continuation in if #available(macOS 14.0, *) { MainActor.shared.assertIsolated() } continuation.resume(returning: ()) } } await Task.detached { await doSomething() }.value

exit status: 132 with

main/<stdin>:5: Fatal error: Incorrect actor executor assumption; Expected 'UnownedSerialExecutor(executor: (Opaque Value))' executor. #0 0x0000558634074067 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/usr/bin/swift-frontend+0x7a71067) #1 0x0000558634071dbe llvm::sys::RunSignalHandlers() (/usr/bin/swift-frontend+0x7a6edbe)

stderr.log

4.08 KB

@swift-6.0-dev -version

norio_nomura

@swift-6.0-dev -version

Swift version 6.0-dev (LLVM 3312447e53da9b3, Swift b62c39583c53f5b) Target: x86_64-unknown-linux-gnu

@swift-5.10.1 var _aa = 1 _aa += 1 let aa = consume _aa

Iceman

@swift-5.10.1 var _aa = 1 _aa += 1 let aa = consume _aa

exit status: 1 with <stdin>:3:18: error: 'consume' cannot be applied to globals let aa = consume _aa ^

@swift-5.10.1 @swift-5.9.2 -enable-experimental-feature StrictConcurrency class Super { } @MainActor final class Sub: Super { }

kntk

@swift-5.10.1 @swift-5.9.2 -enable-experimental-feature StrictConcurrency class Super { } @MainActor final class Sub: Super { }

<stdin>:6:13: warning: main actor-isolated class 'Sub' has different actor isolation from nonisolated superclass 'Super'; this is an error in Swift 6 final class Sub: Super { ^

kntk

@swift-5.10.1 @swift-5.9.2 -enable-experimental-feature StrictConcurrency class Super { } @MainActor final class Sub: Super { }

no output

@swift-5.10.1 class C {} final class C2: C, Sendable {}

Iceman

@swift-5.10.1 class C {} final class C2: C, Sendable {}

exit status: 1 with <stdin>:2:13: error: 'Sendable' class 'C2' cannot inherit from another class final class C2: C, Sendable {} ^

@swift-5.10.1 class C: @unchecked Sendable {} final class C2<NotSendable>: C, Sendable { var foo: NotSendable }

Iceman

@swift-5.10.1 class C: @unchecked Sendable {} final class C2<NotSendable>: C, Sendable { var foo: NotSendable }

exit status: 1 with

<stdin>:2:13: error: class 'C2' has no initializers final class C2<NotSendable>: C, Sendable { ^ <stdin>:3:7: note: stored property 'foo' without initial value prevents synthesized initializers var foo: NotSendable ^

@swift-5.5.3 @swift-5.10.1 -frontend -dump-ast -debug-constraints func f(_ a: Int?) {} func f(_ a: Any) {} f(3) (edited)

kntk

@swift-5.5.3 @swift-5.10.1 -frontend -dump-ast -debug-constraints func f(_ a: Int?) {} func f(_ a: Any) {} f(3) (edited)

(source_file "<stdin>" (func_decl range=[<stdin>:1:1 - line:1:20] "f(_:)" interface type='(Int?) -> ()' access=internal (parameter_list range=[<stdin>:1:7 - line:1:17] (parameter "a" type='Int?' interface type='Int?')) (brace_stmt range=[<stdin>:1:19 - line:1:20])) (func_decl range=[<stdin>:3:1 - line:3:19] "f(_:)" interface type='(Any) -> ()' access=internal (parameter_list range=[<stdin>:3:7 - line:3:16] (parameter "a" type='Any' interface type='Any')) (brace_stmt range=[<stdin>:3:18 - line:3:19])) (top_level_code_decl range=[<stdin>:5:1 - line:5:4] (brace_stmt implicit range=[<stdin>:5:1 - line:5:4] (call_expr type='()' location=<stdin>:5:1 range=[<stdin>:5:1 - line:5:4] nothrow arg_labels=_: (declref_expr type='(Any) -> ()' location=<stdin>:5:1 range=[<stdin>:5:1 - line:5:1] decl=main.(file).f@<stdin>:3:6 function_ref=single) (paren_expr type='(Any)' location=<stdin>:5:3 range=[<stdin>:5:2 - line:5:4] (erasure_expr implicit type='Any' location=<stdin>:5:3 range=[<stdin>:5:3 - line:5:3] (integer_literal_expr type='Int' location=<stdin>:5:3 range=[<stdin>:5:3 - line:5:3] value=3 builtin_initializer=Swift.(file).Int.init(_builtinIntegerLiteral:) initializer=**NULL**)))))))

---Constraint solving at [<stdin>:5:1 - line:5:4]--- (common result type for $T0 is ()) ---Initial constraints for the given expression---

(edited)

stderr.log

5.26 KB

kntk

@swift-5.5.3 @swift-5.10.1 -frontend -dump-ast -debug-constraints func f(_ a: Int?) {} func f(_ a: Any) {} f(3) (edited)

(source_file "<stdin>" (func_decl range=[<stdin>:1:1 - line:1:20] "f(_:)" interface type='(Int?) -> ()' access=internal (parameter_list range=[<stdin>:1:7 - line:1:17] (parameter "a" interface type='Int?')) (brace_stmt range=[<stdin>:1:19 - line:1:20])) (func_decl range=[<stdin>:3:1 - line:3:19] "f(_:)" interface type='(Any) -> ()' access=internal (parameter_list range=[<stdin>:3:7 - line:3:16] (parameter "a" interface type='Any')) (brace_stmt range=[<stdin>:3:18 - line:3:19])) (top_level_code_decl range=[<stdin>:5:1 - line:5:4] (brace_stmt implicit range=[<stdin>:5:1 - line:5:4] (call_expr type='()' location=<stdin>:5:1 range=[<stdin>:5:1 - line:5:4] nothrow isolationCrossing=none (declref_expr type='(Any) -> ()' location=<stdin>:5:1 range=[<stdin>:5:1 - line:5:1] decl=main.(file).f@<stdin>:3:6 function_ref=single) (argument_list (argument (erasure_expr implicit type='Any' location=<stdin>:5:3 range=[<stdin>:5:3 - line:5:3] (integer_literal_expr type='Int' location=<stdin>:5:3 range=[<stdin>:5:3 - line:5:3] value=3 builtin_initializer=Swift.(file).Int.init(_builtinIntegerLiteral:) initializer=**NULL**))))))))

---Constraint solving at [<stdin>:5:1 - line:5:4]--- (common result type for $T0 is ())

stderr.log

10.1 KB

@swift-5.10.1 @swift-5.9.2

struct Box {} struct AsyncBox {} func f(_ a: Box) { print("sync") } func f(_ a: AsyncBox) async { print("async") } func hoge() async { await f(.init()) } await hoge()

(edited)

kntk

@swift-5.10.1 @swift-5.9.2

struct Box {} struct AsyncBox {} func f(_ a: Box) { print("sync") } func f(_ a: AsyncBox) async { print("async") } func hoge() async { await f(.init()) } await hoge()

(edited)

async (edited)

kntk

@swift-5.10.1 @swift-5.9.2

struct Box {} struct AsyncBox {} func f(_ a: Box) { print("sync") } func f(_ a: AsyncBox) async { print("async") } func hoge() async { await f(.init()) } await hoge()

(edited)

async (edited)

@swift-5.10.1 @swift-5.9.2

struct Box {} struct AsyncBox {} func f(_ a: Box) { print("sync") } func f(_ a: AsyncBox) async { print("async") } await f(.init())

kntk

@swift-5.10.1 @swift-5.9.2

struct Box {} struct AsyncBox {} func f(_ a: Box) { print("sync") } func f(_ a: AsyncBox) async { print("async") } await f(.init())

sync<stdin>:11:1: warning: no 'async' operations occur within 'await' expression await f(.init()) ^

1

kntk

@swift-5.10.1 @swift-5.9.2

struct Box {} struct AsyncBox {} func f(_ a: Box) { print("sync") } func f(_ a: AsyncBox) async { print("async") } await f(.init())

sync<stdin>:11:1: warning: no 'async' operations occur within 'await' expression await f(.init()) ^

@swift-5.10.1 @swift-5.9.2 @swift-main

enum Box { case doing(() -> Void) } enum AsyncBox { case doing(() async -> Void) } func f(_ a: Box) { print("sync") } func f(_ a: AsyncBox) async { print("async") } func hoge() async { await f(.doing {}) } await hoge()

(edited)

kntk

@swift-5.10.1 @swift-5.9.2 @swift-main

enum Box { case doing(() -> Void) } enum AsyncBox { case doing(() async -> Void) } func f(_ a: Box) { print("sync") } func f(_ a: AsyncBox) async { print("async") } func hoge() async { await f(.doing {}) } await hoge()

(edited)

sync<stdin>:12:5: warning: no 'async' operations occur within 'await' expression await f(.doing {}) ^ (edited)

kntk

@swift-5.10.1 @swift-5.9.2 @swift-main

enum Box { case doing(() -> Void) } enum AsyncBox { case doing(() async -> Void) } func f(_ a: Box) { print("sync") } func f(_ a: AsyncBox) async { print("async") } func hoge() async { await f(.doing {}) } await hoge()

(edited)

sync<stdin>:12:5: warning: no 'async' operations occur within 'await' expression await f(.doing {}) ^ (edited)

kntk

@swift-5.10.1 @swift-5.9.2 @swift-main

enum Box { case doing(() -> Void) } enum AsyncBox { case doing(() async -> Void) } func f(_ a: Box) { print("sync") } func f(_ a: AsyncBox) async { print("async") } func hoge() async { await f(.doing {}) } await hoge()

(edited)

sync (edited)

~~渡してるクロージャーでawaitしていないと優先的にsyncなクロージャーとして解決されるから、呼び出し元でawaitしててもsyncになるのか...~~ スコア一緒なのにごにゃごにゃしてsyncになってしまっている、なんだこれは

--- Solution #0 --- Fixed score: [component: sync-in-asynchronous(s), value: 1] ... --- Solution #1 --- Fixed score: [component: sync-in-asynchronous(s), value: 1] ...

(edited)

5:56 PM

@swift-5.10.1

enum Box { case doing(() -> Void) } enum AsyncBox { case doing(asyncAction: () async -> Void) case doing(action: () -> Void) } func f(_ a: Box...) { print("sync") } func f(_ a: AsyncBox...) async { print("async") } func hoge() async { await f(.doing {}) } await hoge()

kntk

@swift-5.10.1

enum Box { case doing(() -> Void) } enum AsyncBox { case doing(asyncAction: () async -> Void) case doing(action: () -> Void) } func f(_ a: Box...) { print("sync") } func f(_ a: AsyncBox...) async { print("async") } func hoge() async { await f(.doing {}) } await hoge()

async

1

@swift-5.10.1

import Foundation func cat(length: Int) throws { let data = Data(repeating: 0, count: length) let (stdin, stdout, stderr) = (Pipe(), Pipe(), Pipe()) let process = Process() process.standardInput = stdin process.standardOutput = stdout process.standardError = stderr process.executableURL = URL(fileURLWithPath: "/bin/cat") try process.run() print("write:\(length)") try stdin.fileHandleForWriting.write(contentsOf: data) print("close:\(length)") try stdin.fileHandleForWriting.close() print("waitUntilExit:\(length)") process.waitUntilExit() print("finished:\(length)") } try cat(length: 100) try cat(length: 102400)

t.ae

@swift-5.10.1

import Foundation func cat(length: Int) throws { let data = Data(repeating: 0, count: length) let (stdin, stdout, stderr) = (Pipe(), Pipe(), Pipe()) let process = Process() process.standardInput = stdin process.standardOutput = stdout process.standardError = stderr process.executableURL = URL(fileURLWithPath: "/bin/cat") try process.run() print("write:\(length)") try stdin.fileHandleForWriting.write(contentsOf: data) print("close:\(length)") try stdin.fileHandleForWriting.close() print("waitUntilExit:\(length)") process.waitUntilExit() print("finished:\(length)") } try cat(length: 100) try cat(length: 102400)

execution timeout with no output

@swift-5.3.3

extension Sequence where Element == Int { // var count ... func count( _ predicate: (Int) -> Bool ) -> Int { 0 } } func f(_ a: ((Int) -> Bool) -> Int) { print("func") } func f(_ a: Int) { print("var") } f([1, 2, 3].count)

kntk

@swift-5.3.3

extension Sequence where Element == Int { // var count ... func count( _ predicate: (Int) -> Bool ) -> Int { 0 } } func f(_ a: ((Int) -> Bool) -> Int) { print("func") } func f(_ a: Int) { print("var") } f([1, 2, 3].count)

var

@swift-5.10.1

// @_typeEraser(AnyP) protocol P {} struct ConcreteP1: P {} struct ConcreteP2: P {} struct AnyP: P { init(erasing base: some P) {} } struct Foo { dynamic var p: some P { ConcreteP1() } } extension Foo { @_dynamicReplacement(for: p) var replacedP: some P { ConcreteP2() } } print(Foo().p)

ジュニア

@swift-5.10.1

// @_typeEraser(AnyP) protocol P {} struct ConcreteP1: P {} struct ConcreteP2: P {} struct AnyP: P { init(erasing base: some P) {} } struct Foo { dynamic var p: some P { ConcreteP1() } } extension Foo { @_dynamicReplacement(for: p) var replacedP: some P { ConcreteP2() } } print(Foo().p)

exit status: 255 with

JIT session error: Symbols not found: [ $s4main3FooV9replacedPQrvgTX ] Failed to materialize symbols: { (main, { get_witness_table 4main10ConcreteP1VAA1PHPyHC.1, $s4main3FooV1pQrvpQOy_Qo_MD, $ss27_finalizeUninitializedArrayySayxGABnlF, $s4main3FooV1pQrvpQOMk, $s4main4AnyPVMn, symbolic _____y_Qo_ 4main3FooV1pQrvpQO, $s4main3FooV1pQrvpQOMg, $s4main10ConcreteP1VMa, $s4mainMXM, symbolic $s4main1PP, $s4main3FooV9replacedPQrvpQOMQ, $s4main10ConcreteP2VN, main, $sSa12_endMutationyyF, $s4main3FooV1pQrvg, get_witness_table 4main10ConcreteP2VAA1PHPyHC.2, $s4main10ConcreteP1VN, $s4main3FooVMa, $s4main3FooVACycfC, $s4main4AnyPVAA1PAAWP, symbolic _____ 4main4AnyPV, $ss5print_9separator10terminatoryypd_S2StFfA1_, $s4main10ConcreteP1VAA1PAAWP, $s4main10ConcreteP1VMn, $s4main3FooV1pQrvpQOMQ, $s4main4AnyPVAA1PAAMc, $s4main3FooVN, $s4main10ConcreteP2VMa, $s4main10ConcreteP2VMn, $ss5print_9separator10terminatoryypd_S2StFfA0_, symbolic x, $s4main3FooV9replacedPQrvgTI, $s4main3FooV9replacedPQrvg, $s4main1PMp, $s4main10ConcreteP1VACycfC, $s4main3FooVMn, $s4main3FooV1pQrvpQOMh, __swift_instantiateConcreteTypeFromMangledName, $s4main4AnyPVMa, $s4main3FooV1pQrvgTx, $s4main3FooV9replacedPQrvpQOMg, __swift_allocate_boxed_opaque_existential_0, $s4main4AnyPVN, $s4main10ConcreteP2VACycfC, $s4main3FooV1pQrvgTX, symbolic _____ 4main10ConcreteP2V, symbolic _____ 4main3FooV, $s4main3FooV1pQrvpQOMj, $s4main10ConcreteP2VAA1PAAMc, $s4main10ConcreteP2VAA1PAAWP, symbolic _____ 4main10ConcreteP1V, $s4main10ConcreteP1VAA1PAAMc }) }

@swift-5.10.1

@_typeEraser(AnyP) protocol P {} struct ConcreteP1: P {} struct AnyP: P { init(erasing base: some P) {} } struct Foo { dynamic var p: some P { ConcreteP1() } } print(Foo().p)

ジュニア

@swift-5.10.1

@_typeEraser(AnyP) protocol P {} struct ConcreteP1: P {} struct AnyP: P { init(erasing base: some P) {} } struct Foo { dynamic var p: some P { ConcreteP1() } } print(Foo().p)

AnyP()

@swift-5.10.1

@_typeEraser(AnyP) protocol P {} struct ConcreteP1: P {} struct AnyP: P { init(erasing base: some P) { print("Erasing:", base) } } struct Foo { dynamic var p: some P { ConcreteP1() } } print(Foo().p)

(edited)

ジュニア

@swift-5.10.1

@_typeEraser(AnyP) protocol P {} struct ConcreteP1: P {} struct AnyP: P { init(erasing base: some P) { print("Erasing:", base) } } struct Foo { dynamic var p: some P { ConcreteP1() } } print(Foo().p)

(edited)

Erasing: ConcreteP1() AnyP() (edited)

@swift-5.3.3 @swift-5.10.1

protocol P { } extension P { static func value(_ a: Bool) { } } struct A: P { var string: String } extension Optional: P where Wrapped: P { } extension A { static var value: A? { A(string: "A") } } let a: A? = .value print(a)

(edited)

kntk

@swift-5.3.3 @swift-5.10.1

protocol P { } extension P { static func value(_ a: Bool) { } } struct A: P { var string: String } extension Optional: P where Wrapped: P { } extension A { static var value: A? { A(string: "A") } } let a: A? = .value print(a)

(edited)

exit status: 1 with <stdin>:16:14: error: value of optional type 'A?' must be unwrapped to a value of type 'A' let a: A? = .value ^ (edited)

stderr.log

861 bytes

kntk

@swift-5.3.3 @swift-5.10.1

protocol P { } extension P { static func value(_ a: Bool) { } } struct A: P { var string: String } extension Optional: P where Wrapped: P { } extension A { static var value: A? { A(string: "A") } } let a: A? = .value print(a)

(edited)

Optional(main.A(string: "A"))

<stdin>:17:7: warning: expression implicitly coerced from 'A?' to 'Any' print(a) ^ <stdin>:17:7: note: provide a default value to avoid this warning print(a) ^ ?? <#default value#> <stdin>:17:7: note: force-unwrap the value to avoid this warning print(a) ^ ! <stdin>:17:7: note: explicitly cast to 'Any' with 'as Any' to silence this warning print(a) ^ as Any

@swift-5.3.3 @swift-5.10.1 struct A { static var value: A? { A() } } extension Optional { static func value(_ a: Bool) { } } let a: A? = .value (edited)

kntk

@swift-5.3.3 @swift-5.10.1 struct A { static var value: A? { A() } } extension Optional { static func value(_ a: Bool) { } } let a: A? = .value (edited)

exit status: 1 with

<stdin>:8:14: error: value of optional type 'A?' must be unwrapped to a value of type 'A' let a: A? = .value ^ <stdin>:8:14: note: coalesce using '??' to provide a default when the optional value contains 'nil' let a: A? = .value ^ ?? <#default value#> <stdin>:8:14: note: force-unwrap using '!' to abort execution if the optional value contains 'nil' let a: A? = .value ^ !

(edited)

kntk

@swift-5.3.3 @swift-5.10.1 struct A { static var value: A? { A() } } extension Optional { static func value(_ a: Bool) { } } let a: A? = .value (edited)

no output (edited)

@swift-main @swift-5.10.1 func f( _ operations: [() async throws -> ()] ) async throws { } try await f([ { print("Hello") }, ]) (edited)

Iceman

@swift-main @swift-5.10.1 func f( _ operations: [() async throws -> ()] ) async throws { } try await f([ { print("Hello") }, ]) (edited)

exit status: 134 with

<unknown>:0: error: fatal error encountered during compilation; please submit a bug report (https://swift.org/contributing/#reporting-bugs) <unknown>:0: note: SmallVector unable to grow. Requested capacity (4294967297) is larger than maximum value for size type (4294967295) Stack dump:

(edited)

stderr.log

9.77 KB

Iceman

@swift-main @swift-5.10.1 func f( _ operations: [() async throws -> ()] ) async throws { } try await f([ { print("Hello") }, ]) (edited)

no output

mainでは治ってる。

7:55 AM

特に怪しいところのないコードなのにIRGenで落ちてるのか。

8:00 AM

https://github.com/apple/swift/issues/61872

Compiler crashes when returning an array of async throwing void clo...

Describe the bug When a function returns an array of async throwing void closures, containing only (at least?) one empty closure ({}), the compiler crashes. Steps To Reproduce Create empty executab...

8:00 AM

これ？

お、同じようなエラーですね。

9:33 AM

2022年からあるのか。

パッチからリンクがなくてよくわからんね巻き添えで治った系かなあ

@swift-main @swift-5.10.1 @swift-6.0-dev

@MainActor func doSomething() async { await withUnsafeContinuation { continuation in if #available(macOS 14.0, *) { MainActor.shared.assertIsolated() } continuation.resume(returning: ()) } } await Task.detached { await doSomething() }.value

(edited)

1

kntk

@swift-main @swift-5.10.1 @swift-6.0-dev

@MainActor func doSomething() async { await withUnsafeContinuation { continuation in if #available(macOS 14.0, *) { MainActor.shared.assertIsolated() } continuation.resume(returning: ()) } } await Task.detached { await doSomething() }.value

(edited)

exit status: 132 with

main/<stdin>:5: Fatal error: Incorrect actor executor assumption; Expected 'UnownedSerialExecutor(executor: (Opaque Value))' executor. #0 0x000055b122f77623 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/usr/bin/swift-frontend+0x61b7623) #1 0x000055b122f755de llvm::sys::RunSignalHandlers() (/usr/bin/swift-frontend+0x61b55de)

(edited)

stderr.log

4.08 KB

kntk

@swift-main @swift-5.10.1 @swift-6.0-dev

@MainActor func doSomething() async { await withUnsafeContinuation { continuation in if #available(macOS 14.0, *) { MainActor.shared.assertIsolated() } continuation.resume(returning: ()) } } await Task.detached { await doSomething() }.value

(edited)

no output (edited)

1

１時間後に動いた模様

3:03 PM

510からmainで直った？

マージされて治ったみたいですね、よかった https://t.co/C7hosrxp1J

[Concurrency] Remove _unsafeInheritExecutor from public APIs, use #...

We should be using the #isolation macro in all APIs where _unsafeInheritExecutor was used before; This handles it just for the continuation APIs, more to follow soon. resolves rdar://125307764 reso...

1

3:17 PM

6.0にも入ったみたいです https://github.com/apple/swift/pull/72830

[6.0][Concurrency] Remove _unsafeInheritExecutor from public APIs,...

Description: In order to avoid isolation boundary warnings when task groups are used inside (global) actors we need to inherit isolation contest to most of their async APIs. Specifically, this PR r...

1

じゃなくて

なんだ

2大宗派ですね

(edited)

3:21 PM

3:22 PM

新興勢力っぽい

2

3:22 PM

ていうかBeccaさんとKonradさんだけや

時期で変えてたりするんちゃうか。今は咲いてるから。

たしかに。おしゃれだ

1枚目の画像にyesterdayもありますけどね

3:24 PM

でもそういうアイデアだったらいいですね

せやな。昨日のも実やな。

ああ、cherry-pick->

->

ってことですか単に桜好きなのかと思ってましたw (edited)

そう、cherryのダジャレ

1

3:33 PM

cherry blossom (edited)

3

Kishikawa Katsumi

時期で変えてたりするんちゃうか。今は咲いてるから。

konrad さんに関してはちょうどその絵文字を使い始めた日あたりに桜の toot をしてたので意識してそうですね https://mastodon.social/@ktoso/112177145277204281 (edited)

1

kntk

@swift-main @swift-5.10.1 @swift-6.0-dev

@MainActor func doSomething() async { await withUnsafeContinuation { continuation in if #available(macOS 14.0, *) { MainActor.shared.assertIsolated() } continuation.resume(returning: ()) } } await Task.detached { await doSomething() }.value

(edited)

no output

@swift-5.10.1 @swift-6.0-dev @swift-main struct E: Error {} func foo() throws(E) -> {}

omochimetaru

@swift-5.10.1 @swift-6.0-dev @swift-main struct E: Error {} func foo() throws(E) -> {}

exit status: 1 with

<stdin>:3:18: error: consecutive statements on a line must be separated by ';' func foo() throws(E) -> {} ^ ; <stdin>:3:6: error: expected '{' in body of function declaration func foo() throws(E) -> {} ^ <stdin>:3:25: error: expected type after '->' func foo() throws(E) -> {} ^

omochimetaru

@swift-5.10.1 @swift-6.0-dev @swift-main struct E: Error {} func foo() throws(E) -> {}

exit status: 1 with

<stdin>:3:25: error: expected type for function result 1 | struct E: Error {} 2 | 3 | func foo() throws(E) -> {} | `- error: expected type for function result 4 |

@swift-5.10.1

protocol P { mutating func mutatingFunc1() mutating func mutatingFunc2() func nonMutatingFunc() } extension P { mutating func mutatingFunc1() { print("mutatingFunc1 of P") } func mutatingFunc2() { print("mutatingFunc2 of P") } func nonMutatingFunc() { print("nonMutatingFunc of P") } } struct S: P { mutating func mutatingFunc1() { print("mutatingFunc1 of S") } mutating func mutatingFunc2() { print("mutatingFunc2 of S") } func nonMutatingFunc() { print("nonMutatingFunc of S") } } func useP(_ p: some P) { p.mutatingFunc2() p.nonMutatingFunc() } func useMutableP(_ p: inout some P) { p.mutatingFunc1() p.mutatingFunc2() p.nonMutatingFunc() } var s = S() print("--- useP ---") useP(s) print("--- useMutableP ---") useMutableP(&s)

ジュニア

@swift-5.10.1

protocol P { mutating func mutatingFunc1() mutating func mutatingFunc2() func nonMutatingFunc() } extension P { mutating func mutatingFunc1() { print("mutatingFunc1 of P") } func mutatingFunc2() { print("mutatingFunc2 of P") } func nonMutatingFunc() { print("nonMutatingFunc of P") } } struct S: P { mutating func mutatingFunc1() { print("mutatingFunc1 of S") } mutating func mutatingFunc2() { print("mutatingFunc2 of S") } func nonMutatingFunc() { print("nonMutatingFunc of S") } } func useP(_ p: some P) { p.mutatingFunc2() p.nonMutatingFunc() } func useMutableP(_ p: inout some P) { p.mutatingFunc1() p.mutatingFunc2() p.nonMutatingFunc() } var s = S() print("--- useP ---") useP(s) print("--- useMutableP ---") useMutableP(&s)

--- useP --- mutatingFunc2 of P nonMutatingFunc of S --- useMutableP --- mutatingFunc1 of S mutatingFunc2 of S nonMutatingFunc of S

@swift-5.9.2 @swift-5.10.1

public final class Function<R, each A> { public init( _ body: @escaping (repeat each A) -> R ) { self.body = body } public var body: (repeat each A) -> R public func callAsFunction(_ args: repeat each A) -> R { body(repeat each args) } }

omochimetaru

@swift-5.9.2 @swift-5.10.1

public final class Function<R, each A> { public init( _ body: @escaping (repeat each A) -> R ) { self.body = body } public var body: (repeat each A) -> R public func callAsFunction(_ args: repeat each A) -> R { body(repeat each args) } }

exit status: 1 with

<stdin>:5:19: error: type of expression is ambiguous without a type annotation self.body = body ~~~~~~~~~~^~~~~~ <stdin>:11:13: error: missing argument for parameter #1 in call body(repeat each args) ^ <#repeat each A#>, <stdin>:8:16: note: 'body' declared here public var body: (repeat each A) -> R ^

omochimetaru

@swift-5.9.2 @swift-5.10.1

public final class Function<R, each A> { public init( _ body: @escaping (repeat each A) -> R ) { self.body = body } public var body: (repeat each A) -> R public func callAsFunction(_ args: repeat each A) -> R { body(repeat each args) } }

no output

@swift-5.7.3 @swift-5.8.1 import Foundation try? await ContinuousClock().sleep(for: .seconds(1))

treastrain / Tanaka.R

@swift-5.7.3 @swift-5.8.1 import Foundation try? await ContinuousClock().sleep(for: .seconds(1))

no output

@swift-5.5.3 -Xfrontend -emit-sil

@MainActor func doSomething() async { await withUnsafeContinuation { continuation in continuation.resume(returning: ()) } }

kntk

@swift-5.5.3 -Xfrontend -emit-sil

@MainActor func doSomething() async { await withUnsafeContinuation { continuation in continuation.resume(returning: ()) } }

sil_stage canonical import Builtin

stdout.log

8.36 KB

@swift-5.5.3 -Xfrontend -emit-silgen

@MainActor func doSomething() async { await withUnsafeContinuation { continuation in continuation.resume(returning: ()) } }

kntk

@swift-5.5.3 -Xfrontend -emit-silgen

@MainActor func doSomething() async { await withUnsafeContinuation { continuation in continuation.resume(returning: ()) } }

sil_stage raw import Builtin

stdout.log

4.68 KB

@swift-5.10.1 @swift-6.0-dev

actor Counter { var count = 0 func increment() { count += 1 } func incrementCounters(c: isolated Counter) async { for _ in 0..<1_000 { await self.increment() c.increment() } } } let c1 = Counter() let c2 = Counter() let t1 = Task.detached { await c1.incrementCounters(c: c2) } let t2 = Task.detached { await c2.incrementCounters(c: c1) } await (t1.value, t2.value) await print(c1.count, c2.count)

kntk

@swift-5.10.1 @swift-6.0-dev

actor Counter { var count = 0 func increment() { count += 1 } func incrementCounters(c: isolated Counter) async { for _ in 0..<1_000 { await self.increment() c.increment() } } } let c1 = Counter() let c2 = Counter() let t1 = Task.detached { await c1.incrementCounters(c: c2) } let t2 = Task.detached { await c2.incrementCounters(c: c1) } await (t1.value, t2.value) await print(c1.count, c2.count)

2000 2000<stdin>:19:7: warning: expression of type '((), ())' is unused await (t1.value, t2.value) ^~~~~~~~~~~~~~~~~~~~

kntk

@swift-5.10.1 @swift-6.0-dev

actor Counter { var count = 0 func increment() { count += 1 } func incrementCounters(c: isolated Counter) async { for _ in 0..<1_000 { await self.increment() c.increment() } } } let c1 = Counter() let c2 = Counter() let t1 = Task.detached { await c1.incrementCounters(c: c2) } let t2 = Task.detached { await c2.incrementCounters(c: c1) } await (t1.value, t2.value) await print(c1.count, c2.count)

2000 2000

5.3と5.7ボットが止まってたの、~~外向けトラフィック~~インスタンス起因のトラフィックが多すぎるという理由でrenderのインスタンスがsuspendされてた。suspendの通知が無かったので気づかなかった。 (edited)

そんな理由でSuspendされるんだ。

あいや、外部起因のトラフィックが多すぎるではなく、インスタンス起因のトラフィックが多すぎる、っていうニュアンスだった。

なるほど。InboundじゃなくてOutboundが多すぎるから変だってことか。

Outboundが多すぎるってことは多分無いと思うんだけど、ログが残ってないから正確なところは分からないです。通知が来てればログの保持期間内に何か調べられたと思うのだけど。 (edited)

6:45 AM

ビルド時にダウンロードするものが多すぎたのか？とも思ったのですが、ビルド履歴を見る限りsuspendされる前にビルドが繰り返されたとかも無かった。

死活監視はUpptimeを使うとGitHub Actionsでできますよ。 https://github.com/upptime/upptime

GitHub - upptime/upptime: ⬆️ GitHub Actions uptime monitor & status...

⬆️ GitHub Actions uptime monitor & status page by @AnandChowdhary - upptime/upptime

ありがとうございます。BetterUptimeから移行しようかな。

私もBetterUptimeを使ってましたがOSSだとGitHub Actionsが使いほうだいなので乗り換えちゃいました。

監視ホスト数の上限がなくなるとボットが多くなりすぎて、メンバーリストで邪魔になりそう。 (edited)

10:22 AM

ロールを折り畳めればいいのに

メンバーリストって右のですね。見ることあります？

僕自身はボットがオンラインかどうかしか見ないので問題ないのですが、他の人がどう使ってるか知らないので、邪魔だったりするのかな？と。

私はメンバーリストを開くことはまずないですね。私の感覚だとそこがどうなっても気にすることはないと思います。

気にしないでおきます。

Upptime設定して、古いボットもオンラインにした。 @swift-4.0.3 -version

norio_nomura

Upptime設定して、古いボットもオンラインにした。 @swift-4.0.3 -version

Swift version 4.0.3 (swift-4.0.3-RELEASE) Target: x86_64-unknown-linux-gnu

Upptimeを動かすGitHub Actionsのスケジュール実行が全くスケジュール通りに動かなくて、ボット止まりまくり。BetterUptimeも復活させる。

@swift-main package --version

omochimetaru

@swift-main package --version

Swift Package Manager - Swift 6.0.0-dev

@swift-6.0-dev func f() { inner() return; func inner() { print("after return") } } f() (edited)

12:00 PM

GPTにコード聞いてたらローカル関数をreturnの後ろに書いてて面白かった

何がafter returnやねん

ローカル関数の定義に場所は関係ないことをどういうわけか使いこなしてる

いや、書いた場所がそうという意味かｗ

Iceman

@swift-6.0-dev func f() { inner() return; func inner() { print("after return") } } f() (edited)

after return

Iceman

@swift-6.0-dev func f() { inner() return; func inner() { print("after return") } } f() (edited)

after return

@swift-5.6.3

struct S {} func run <R>(body: () -> R) -> R { body() } func foo(x: S) -> S {x} func main() { run { let x = S() let y = foo(x: x) return y } }

fummicc1

@swift-5.6.3

struct S {} func run <R>(body: () -> R) -> R { body() } func foo(x: S) -> S {x} func main() { run { let x = S() let y = foo(x: x) return y } }

exit status: 1 with

<stdin>:10:9: error: cannot infer return type for closure with multiple statements; add explicit type to disambiguate run { ^ () -> <#Result#> in

@swift-5.10.1 @swift-6.0-dev

func transform<each T>(_ v: (repeat each T)) -> (repeat each T) { return (repeat each v) } let myTuple = (1, "Hello", 3.14) let transformedTuple = transform(myTuple) print(transformedTuple)

Iceman

@swift-5.10.1 @swift-6.0-dev

func transform<each T>(_ v: (repeat each T)) -> (repeat each T) { return (repeat each v) } let myTuple = (1, "Hello", 3.14) let transformedTuple = transform(myTuple) print(transformedTuple)

exit status: 134 with

<unknown>:0: error: fatal error encountered during compilation; please submit a bug report (https://swift.org/contributing/#reporting-bugs) <unknown>:0: note: unsupported collection upcast kind Stack dump:

stderr.log

8.94 KB

Iceman

@swift-5.10.1 @swift-6.0-dev

func transform<each T>(_ v: (repeat each T)) -> (repeat each T) { return (repeat each v) } let myTuple = (1, "Hello", 3.14) let transformedTuple = transform(myTuple) print(transformedTuple)

(1, "Hello", 3.14)

おお！6.0ならいけるのか

@swift-6.0-dev @swift-5.10.1

extension String { static func foo(_ int: Int, other: Bool = true) -> String { "foo" } } func f() { let a = switch "" { case .foo(.zero): true default: false } switch "" { case .foo(.zero): break default: break } }

Iceman

@swift-6.0-dev @swift-5.10.1

extension String { static func foo(_ int: Int, other: Bool = true) -> String { "foo" } } func f() { let a = switch "" { case .foo(.zero): true default: false } switch "" { case .foo(.zero): break default: break } }

exit status: 1 with <stdin>:7:16: error: value of tuple type '(Int, other: Bool)' has no member 'zero' case .foo(.zero): true ~^~~~

Iceman

@swift-6.0-dev @swift-5.10.1

extension String { static func foo(_ int: Int, other: Bool = true) -> String { "foo" } } func f() { let a = switch "" { case .foo(.zero): true default: false } switch "" { case .foo(.zero): break default: break } }

exit status: 1 with

<stdin>:7:16: error: value of tuple type '(Int, other: Bool)' has no member 'zero' 5 | func f() { 6 | let a = switch "" { 7 | case .foo(.zero): true | `- error: value of tuple type '(Int, other: Bool)' has no member 'zero' 8 | default: false 9 | }

Switch式のときは何故かデフォルト値が使えない

なんだそりゃｗ

@swift-5.10.1 -version

norio_nomura

@swift-5.10.1 -version

Swift version 5.10.1 (swift-5.10.1-RELEASE) Target: x86_64-unknown-linux-gnu

@swift-5.9.2

// The Swift Programming Language // https://docs.swift.org/swift-book print("Hello, world!") class TaskRunner { private(set) var count = 0 func callAsFunction() async { Task { count += 1 print(count) } } } let runner = TaskRunner() await runner()

fummicc1

@swift-5.9.2

// The Swift Programming Language // https://docs.swift.org/swift-book print("Hello, world!") class TaskRunner { private(set) var count = 0 func callAsFunction() async { Task { count += 1 print(count) } } } let runner = TaskRunner() await runner()

Hello, world! 1

@swift-5.10.1

// The Swift Programming Language // https://docs.swift.org/swift-book import Foundation print("Hello, world!") class TaskRunner { private(set) var count = 0 func callAsFunction() async { print(Thread.isMainThread) Task { print(Thread.isMainThread) count += 1 print(count) } print("End of callAsFunction") } } func main() { let runner = TaskRunner() print(Thread.isMainThread) Task { await runner() print("End of runner") } print("End of main") } main() print("End")

fummicc1

@swift-5.10.1

// The Swift Programming Language // https://docs.swift.org/swift-book import Foundation print("Hello, world!") class TaskRunner { private(set) var count = 0 func callAsFunction() async { print(Thread.isMainThread) Task { print(Thread.isMainThread) count += 1 print(count) } print("End of callAsFunction") } } func main() { let runner = TaskRunner() print(Thread.isMainThread) Task { await runner() print("End of runner") } print("End of main") } main() print("End")

Hello, world! true false End of callAsFunction End of runner false 1 End of main End

手元と実行結果が違う

Linuxはメインアクターがメインスレッドというわけではないんですよね

1

https://developer.apple.com/documentation/swift/actor/assertisolated(_:file:line:)

assertIsolated(_:file:line:) | Apple Developer Documentation

Performs an executor check in debug builds.

1

5:16 AM

正しい判定方法はこちら

1

@swift-5.10.1 @swift-main

import Foundation import FoundationNetworking let url = URL(string: "https://api.isevenapi.xyz/api/iseven/6/")! let (data, _) = try await URLSession.shared.data(from: url) print(String(decoding: data, as: UTF8.self))

zunda

@swift-5.10.1 @swift-main

import Foundation import FoundationNetworking let url = URL(string: "https://api.isevenapi.xyz/api/iseven/6/")! let (data, _) = try await URLSession.shared.data(from: url) print(String(decoding: data, as: UTF8.self))

exit status: 1 with

<stdin>:6:45: error: value of type 'URLSession' has no member 'data' let (data, _) = try await URLSession.shared.data(from: url) ~~~~~~~~~~~~~~~~~ ^~~~

zunda

@swift-5.10.1 @swift-main

import Foundation import FoundationNetworking let url = URL(string: "https://api.isevenapi.xyz/api/iseven/6/")! let (data, _) = try await URLSession.shared.data(from: url) print(String(decoding: data, as: UTF8.self))

{"ad":"WANTED: Air Traffic Control. No Exp. Needed; we train, HS grads 17-34. Great pay, benefits. Must relocate. Call 284-555-7133","iseven":true}

@swift-main --version

omochimetaru

@swift-main --version

Swift version 6.0-dev (LLVM 579155491d559cc, Swift 64869e5a42221b2) Target: x86_64-unknown-linux-gnu

@swift-main enum Foo { case foo(baz: Int) case foo(bar: Int) // NO ERROR!!!! }

Kuniwak

@swift-main enum Foo { case foo(baz: Int) case foo(bar: Int) // NO ERROR!!!! }

no output

@swift-main

enum Foo { case foo(baz: Int) case foo(bar: Int) // NO ERROR!!!! } let foo: Foo = .foo(baz: 0) switch foo { case .foo(baz: let baz): print(baz.description) case .foo(bar: let bar): // ERROR print(bar.description) }

Kuniwak

@swift-main

enum Foo { case foo(baz: Int) case foo(bar: Int) // NO ERROR!!!! } let foo: Foo = .foo(baz: 0) switch foo { case .foo(baz: let baz): print(baz.description) case .foo(bar: let bar): // ERROR print(bar.description) }

exit status: 1 with

<stdin>:8:11: error: tuple pattern element label 'baz' must be 'bar' 6 | let foo: Foo = .foo(baz: 0) 7 | switch foo { 8 | case .foo(baz: let baz): | `- error: tuple pattern element label 'baz' must be 'bar' 9 | print(baz.description) 10 | case .foo(bar: let bar): // ERROR

@swift-5.10.1 @swift-5.5.3 @swift-5.4.3

enum Foo { case foo(v1: String) case foo(v2: String) } let foo = Foo.foo(v1: "Hello") print(foo) switch foo { case .foo(v1: let string): print(string) case .foo(v2: let string): print(string) }

zunda

@swift-5.10.1 @swift-5.5.3 @swift-5.4.3

enum Foo { case foo(v1: String) case foo(v2: String) } let foo = Foo.foo(v1: "Hello") print(foo) switch foo { case .foo(v1: let string): print(string) case .foo(v2: let string): print(string) }

exit status: 134 with

swift-frontend: /home/buildnode/jenkins/workspace/oss-swift-5.4-package-linux-ubuntu-18_04/swift/lib/Sema/TypeCheckPattern.cpp:99: swift::EnumElementDecl *filterForEnumElement(swift::DeclContext *, swift::SourceLoc, bool, swift::LookupResult): Assertion `!foundElement && "ambiguity in enum case name lookup?!"' failed. Please submit a bug report (https://swift.org/contributing/#reporting-bugs) and include the project and the crash backtrace. Stack dump:

stderr.log

5.26 KB

zunda

@swift-5.10.1 @swift-5.5.3 @swift-5.4.3

enum Foo { case foo(v1: String) case foo(v2: String) } let foo = Foo.foo(v1: "Hello") print(foo) switch foo { case .foo(v1: let string): print(string) case .foo(v2: let string): print(string) }

exit status: 134 with

swift-frontend: /home/buildnode/jenkins/workspace/oss-swift-5.5-package-linux-ubuntu-18_04/swift/lib/Sema/TypeCheckPattern.cpp:100: swift::EnumElementDecl *filterForEnumElement(swift::DeclContext *, swift::SourceLoc, bool, swift::LookupResult): Assertion `!foundElement && "ambiguity in enum case name lookup?!"' failed. Please submit a bug report (https://swift.org/contributing/#reporting-bugs) and include the project and the crash backtrace. Stack dump:

stderr.log

5.35 KB

zunda

@swift-5.10.1 @swift-5.5.3 @swift-5.4.3

enum Foo { case foo(v1: String) case foo(v2: String) } let foo = Foo.foo(v1: "Hello") print(foo) switch foo { case .foo(v1: let string): print(string) case .foo(v2: let string): print(string) }

exit status: 1 with <stdin>:11:12: error: tuple pattern element label 'v1' must be 'v2' case .foo(v1: let string): ^

あれえ、随分前からできないのかｗ

そんなあ

前はコンパイル出来たんですけど実行エラーになってたっぽいです。途中でコンパイルエラーが出るようになったようです。

ラベル違いは実は許されてるって事だけ知ってたけど使うことのできない全く意味のない知識だったのか (edited)

@swift-main let foo = { () -> some Codable in 1 }() print(foo)

Iceman

@swift-main let foo = { () -> some Codable in 1 }() print(foo)

exit status: 1 with

<stdin>:1:19: error: 'some' types are only permitted in properties, subscripts, and functions 1 | let foo = { () -> some Codable in 1 }() | `- error: 'some' types are only permitted in properties, subscripts, and functions 2 | print(foo) 3 |

@swift-main @freestanding(codeItem) macro Foo() = #externalMacro(module: "", type: "")

Iceman

@swift-main @freestanding(codeItem) macro Foo() = #externalMacro(module: "", type: "")

exit status: 1 with

<stdin>:1:15: error: codeItem macros are an experimental feature that is not enabled 1 | @freestanding(codeItem) | `- error: codeItem macros are an experimental feature that is not enabled 2 | macro Foo() = #externalMacro(module: "", type: "") 3 | <stdin>:2:7: warning: external macro implementation type '.' could not be found for macro 'Foo()'; plugin for module '' not found 1 | @freestanding(codeItem) 2 | macro Foo() = #externalMacro(module: "", type: "") | `- warning: external macro implementation type '.' could not be found for macro 'Foo()'; plugin for module '' not found 3 |

@swift-main

let foo: (String) -> some CustomStringConvertible = { s in struct Foo: CustomStringConvertible { var description: String } return Foo(description: s) }

Iceman

@swift-main

let foo: (String) -> some CustomStringConvertible = { s in struct Foo: CustomStringConvertible { var description: String } return Foo(description: s) }

exit status: 1 with

<stdin>:5:12: error: cannot convert value of type 'Foo' to closure result type 'some CustomStringConvertible' 3 | var description: String 4 | } 5 | return Foo(description: s) | `- error: cannot convert value of type 'Foo' to closure result type 'some CustomStringConvertible' 6 | } 7 |

なんでやねん

2:38 PM

@swift-main

let foo: (String) -> any CustomStringConvertible = { s in struct Foo: CustomStringConvertible { var description: String } return Foo(description: s) }

Iceman

@swift-main

let foo: (String) -> any CustomStringConvertible = { s in struct Foo: CustomStringConvertible { var description: String } return Foo(description: s) }

no output

anyは良いのか〜

norio_nomura

Upptimeを動かすGitHub Actionsのスケジュール実行が全くスケジュール通りに動かなくて、ボット止まりまくり。BetterUptimeも復活させる。

結局Upptimeはやめて uptime.betterstack.com (旧BetterUptime)を追加した。

@swift-5.10.1 UInt64(Double(UInt64.max))

Iceman

@swift-5.10.1 UInt64(Double(UInt64.max))

exit status: 132 with <stdin>:1:1: warning: result of 'UInt64' initializer is unused UInt64(Double(UInt64.max)) ^ ~~~~~~~~~~~~~~~~~~~~

stderr.log

5.8 KB

@swift-5.10.1 print(UInt64.max) print(Double(UInt64.max))

Iceman

@swift-5.10.1 print(UInt64.max) print(Double(UInt64.max))

18446744073709551615 1.8446744073709552e+19

@swift-main enum SomeError: Error {} protocol MyProtocol { init(param: String) throws init(param: String) throws(SomeError) }

fummicc1

@swift-main enum SomeError: Error {} protocol MyProtocol { init(param: String) throws init(param: String) throws(SomeError) }

exit status: 1 with

<stdin>:5:5: error: invalid redeclaration of 'init(param:)' 3 | protocol MyProtocol { 4 | init(param: String) throws 5 | init(param: String) throws(SomeError) | `- error: invalid redeclaration of 'init(param:)' 6 | } 7 |

@swift-main protocol MyProtocol { func a(param: String) throws(any LocalizedError) }

fummicc1

@swift-main protocol MyProtocol { func a(param: String) throws(any LocalizedError) }

exit status: 1 with

<stdin>:2:38: error: cannot find type 'LocalizedError' in scope 1 | protocol MyProtocol { 2 | func a(param: String) throws(any LocalizedError) | `- error: cannot find type 'LocalizedError' in scope 3 | } 4 | <stdin>:2:34: error: thrown type '<<error type>>' does not conform to the 'Error' protocol 1 | protocol MyProtocol { 2 | func a(param: String) throws(any LocalizedError) | `- error: thrown type '<<error type>>' does not conform to the 'Error' protocol 3 | } 4 |

@swift-main import Foundation protocol MyProtocol { func a(param: String) throws(any LocalizedError) }

fummicc1

@swift-main import Foundation protocol MyProtocol { func a(param: String) throws(any LocalizedError) }

exit status: 1 with

<stdin>:4:34: error: thrown type 'any LocalizedError' does not conform to the 'Error' protocol 2 | 3 | protocol MyProtocol { 4 | func a(param: String) throws(any LocalizedError) | `- error: thrown type 'any LocalizedError' does not conform to the 'Error' protocol 5 | } 6 |

@swift-main protocol MyProtocol { func a(param: String) throws(Error) func a(param: String) throws(Never) }

fummicc1

@swift-main protocol MyProtocol { func a(param: String) throws(Error) func a(param: String) throws(Never) }

exit status: 1 with

<stdin>:3:10: error: invalid redeclaration of 'a(param:)' 1 | protocol MyProtocol { 2 | func a(param: String) throws(Error) 3 | func a(param: String) throws(Never) | `- error: invalid redeclaration of 'a(param:)' 4 | } 5 |

@swift-5.10.1 @swift-6.0-dev @swift-main

import Foundation public protocol AnyOptionalType { static var wrappedType: Any.Type { get } static var `nil`: Any { get } var wrappedValue: Any? { get } } public protocol OptionalType: AnyOptionalType { associatedtype Wrapped init(_ wrapped: Wrapped) } extension OptionalType { public static var wrappedType: Any.Type { return Wrapped.self } } extension Optional: OptionalType { public static var `nil`: Any { Self.none as Any } public var wrappedValue: Any? { self } } func main(x: Int?) async throws { if let x = x as? any AnyOptionalType { if case .some(let x) = x.wrappedValue { print("AnyOptionalType: \(x)") } else { print("AnyOptionalType none") } } else { print("not AnyOptionalType") } } try await main(x: nil)

omochimetaru

@swift-5.10.1 @swift-6.0-dev @swift-main

import Foundation public protocol AnyOptionalType { static var wrappedType: Any.Type { get } static var `nil`: Any { get } var wrappedValue: Any? { get } } public protocol OptionalType: AnyOptionalType { associatedtype Wrapped init(_ wrapped: Wrapped) } extension OptionalType { public static var wrappedType: Any.Type { return Wrapped.self } } extension Optional: OptionalType { public static var `nil`: Any { Self.none as Any } public var wrappedValue: Any? { self } } func main(x: Int?) async throws { if let x = x as? any AnyOptionalType { if case .some(let x) = x.wrappedValue { print("AnyOptionalType: \(x)") } else { print("AnyOptionalType none") } } else { print("not AnyOptionalType") } } try await main(x: nil)

AnyOptionalType none

omochimetaru

@swift-5.10.1 @swift-6.0-dev @swift-main

import Foundation public protocol AnyOptionalType { static var wrappedType: Any.Type { get } static var `nil`: Any { get } var wrappedValue: Any? { get } } public protocol OptionalType: AnyOptionalType { associatedtype Wrapped init(_ wrapped: Wrapped) } extension OptionalType { public static var wrappedType: Any.Type { return Wrapped.self } } extension Optional: OptionalType { public static var `nil`: Any { Self.none as Any } public var wrappedValue: Any? { self } } func main(x: Int?) async throws { if let x = x as? any AnyOptionalType { if case .some(let x) = x.wrappedValue { print("AnyOptionalType: \(x)") } else { print("AnyOptionalType none") } } else { print("not AnyOptionalType") } } try await main(x: nil)

AnyOptionalType none

omochimetaru

@swift-5.10.1 @swift-6.0-dev @swift-main

import Foundation public protocol AnyOptionalType { static var wrappedType: Any.Type { get } static var `nil`: Any { get } var wrappedValue: Any? { get } } public protocol OptionalType: AnyOptionalType { associatedtype Wrapped init(_ wrapped: Wrapped) } extension OptionalType { public static var wrappedType: Any.Type { return Wrapped.self } } extension Optional: OptionalType { public static var `nil`: Any { Self.none as Any } public var wrappedValue: Any? { self } } func main(x: Int?) async throws { if let x = x as? any AnyOptionalType { if case .some(let x) = x.wrappedValue { print("AnyOptionalType: \(x)") } else { print("AnyOptionalType none") } } else { print("not AnyOptionalType") } } try await main(x: nil)

AnyOptionalType none

あれ？

5:00 AM

1

5:01 AM

手元のXcode16 beta2だと意味わからん実行時エラーになる。

5:02 AM

どなたかXcode16 beta2 入れてる人、試してもらえませんかね？マシン環境かどうか切り分けたい

@omochimetaru 再現した、Xcode 16.0 beta 2 (16A5171r) x macOS 14.5 (23F79)

お、ありがとうございます　同じだ

6:01 AM

実行時キャストはstdlib runtimeだから、OS同梱されてるはずで、

6:01 AM

もしかしたらSonomaじゃなくてSequoiaだったら大丈夫とかもあるかもしれないけど

6:02 AM

まあとりあえず僕の環境の問題じゃないし、mainでは大丈夫みたいだし勝手に直るのを待つことにします

1

これSequoiaベータでどうなるか試せる人居ないかな（それで動くなら乗り換えたい） (edited)

macOS 15.0 Beta (24A5279h)とXcode 16.0 beta 2 (16A5171r)でAnyOptionalType noneで終了したよ。 (edited)

1:08 AM

おお、ありがとうございます。やっぱりOS同梱のstdlibの互換性の問題なのか・・・　セコイア行くか

なるほど

ワシは別パーティションに入れた。

@swift-main @swift-6.0-dev @swift-5.10.1 @swift-5.9.2 -strict-concurrency=complete

enum E: Sendable { case a, b, c } actor A { func foo(e: E = .a) {} } struct Main: Sendable { let a: A = A() init() {} func run() async { await a.foo(e: .a) } }

omochimetaru

@swift-main @swift-6.0-dev @swift-5.10.1 @swift-5.9.2 -strict-concurrency=complete

enum E: Sendable { case a, b, c } actor A { func foo(e: E = .a) {} } struct Main: Sendable { let a: A = A() init() {} func run() async { await a.foo(e: .a) } }

no output

omochimetaru

@swift-main @swift-6.0-dev @swift-5.10.1 @swift-5.9.2 -strict-concurrency=complete

enum E: Sendable { case a, b, c } actor A { func foo(e: E = .a) {} } struct Main: Sendable { let a: A = A() init() {} func run() async { await a.foo(e: .a) } }

no output

omochimetaru

@swift-main @swift-6.0-dev @swift-5.10.1 @swift-5.9.2 -strict-concurrency=complete

enum E: Sendable { case a, b, c } actor A { func foo(e: E = .a) {} } struct Main: Sendable { let a: A = A() init() {} func run() async { await a.foo(e: .a) } }

no output

omochimetaru

@swift-main @swift-6.0-dev @swift-5.10.1 @swift-5.9.2 -strict-concurrency=complete

enum E: Sendable { case a, b, c } actor A { func foo(e: E = .a) {} } struct Main: Sendable { let a: A = A() init() {} func run() async { await a.foo(e: .a) } }

no output

@swift-main struct Foo<Bar> { func foo() { struct Body: Codable { } } }

zunda

@swift-main struct Foo<Bar> { func foo() { struct Body: Codable { } } }

exit status: 1 with

<stdin>:3:12: error: type 'Body' cannot be nested in generic function 'foo()' 1 | struct Foo<Bar> { 2 | func foo() { 3 | struct Body: Codable { | `- error: type 'Body' cannot be nested in generic function 'foo()' 4 | 5 | }

@swift-main print([1,2,3].randomElement()!)

Iceman

@swift-main print([1,2,3].randomElement()!)

1

@swift-main @swift-6.0-dev @swift-5.10.1 -strict-concurrency=complete struct S: Sendable {} actor A { func foo(e: S = S()) {} } func main(a: A) async { await a.foo() }

omochimetaru

@swift-main @swift-6.0-dev @swift-5.10.1 -strict-concurrency=complete struct S: Sendable {} actor A { func foo(e: S = S()) {} } func main(a: A) async { await a.foo() }

no output

omochimetaru

@swift-main @swift-6.0-dev @swift-5.10.1 -strict-concurrency=complete struct S: Sendable {} actor A { func foo(e: S = S()) {} } func main(a: A) async { await a.foo() }

no output

omochimetaru

@swift-main @swift-6.0-dev @swift-5.10.1 -strict-concurrency=complete struct S: Sendable {} actor A { func foo(e: S = S()) {} } func main(a: A) async { await a.foo() }

no output

う〜ん？

1:08 AM

Xcode16 beta3 と beta4では警告が出るんだけど。

botと同じように標準入力から渡すとエラーが出ないみたい。

$ pbpaste|swift - -strict-concurrency=complete $ swift -strict-concurrency=complete (pbpaste|psub) /var/folders/kt/2mwy9b_56_7993x190pl_1fh0000gn/T/.psub.4cIohIsV1d:8:13: warning: sending 'self'-isolated value of type 'S' with later accesses to actor-isolated context risks causing data races; this is an error in the Swift 6 language mode 6 | 7 | func main(a: A) async { 8 | await a.foo() | `- warning: sending 'self'-isolated value of type 'S' with later accesses to actor-isolated context risks causing data races; this is an error in the Swift 6 language mode 9 | } $ swift -version swift-driver version: 1.112.3 Apple Swift version 6.0 (swiftlang-6.0.0.6.8 clang-1600.0.23.1) Target: arm64-apple-macosx15.0

(edited)

ええ〜！？

2:22 AM

じゃあ、bot君じゃ「swift-main では問題が起きないこと」を検証できていないですね。

そうなりますね。botの動作を変えないといけないのか。

僕の手元でも確認できました。

[omochi@omochi-mbp sen]$ cat a.swift struct S: Sendable {} actor A { func foo(e: S = S()) {} } func main(a: A) async { await a.foo() } print(1) [omochi@omochi-mbp sen]$ cat a.swift | swift - -strict-concurrency=complete 1

2:30 AM

挙動が違うのやばいな

標準入力経由だとエラーが出ない挙動を無効にできないものか。

ファイル名指定だとコンパイルするモジュールの名前が a になってると思うけど (a.swift の場合) (edited)

2:31 AM

標準入力だとその辺が違うんですかね。ファイル名取れないし。

@swift-main @swift-4.0.3 print(#file)

norio_nomura

@swift-main @swift-4.0.3 print(#file)

<stdin>

norio_nomura

@swift-main @swift-4.0.3 print(#file)

<stdin>

[omochi@omochi-mbp sen]$ cat a.swift | swift -module-name main -strict-concurrency=complete - 1 <stdin>:8:13: warning: sending 'self'-isolated value of type 'S' with later accesses to actor-isolated context risks causing data races; this is an error in the Swift 6 language mode 6 | 7 | func main(a: A) async { 8 | await a.foo() | `- warning: sending 'self'-isolated value of type 'S' with later accesses to actor-isolated context risks causing data races; this is an error in the Swift 6 language mode 9 | } 10 |

2:32 AM

お、できたぞ

2:33 AM

[omochi@omochi-mbp sen]$ cat a.swift | swift -strict-concurrency=complete - 1 <stdin>:8:13: warning: sending 'self'-isolated value of type 'S' with later accesses to actor-isolated context risks causing data races; this is an error in the Swift 6 language mode 6 | 7 | func main(a: A) async { 8 | await a.foo() | `- warning: sending 'self'-isolated value of type 'S' with later accesses to actor-isolated context risks causing data races; this is an error in the Swift 6 language mode 9 | } 10 |

てかこれでいいですね

オプションの順番が重要？

野村さんのコマンドラインとは、「標準入力から入れるよ」の意味の - の場所が違っています。 (edited)

2:33 AM

シンプルにstrict-concurrencyが付いてないのかも、- が左にあると (edited)

@swift-main @swift-6.0-dev @swift-5.10.1 "-strict-concurrency=complete" struct S: Sendable {} actor A { func foo(e: S = S()) {} } func main(a: A) async { await a.foo() } (edited)

norio_nomura

@swift-main @swift-6.0-dev @swift-5.10.1 "-strict-concurrency=complete" struct S: Sendable {} actor A { func foo(e: S = S()) {} } func main(a: A) async { await a.foo() } (edited)

no output (edited)

norio_nomura

@swift-main @swift-6.0-dev @swift-5.10.1 "-strict-concurrency=complete" struct S: Sendable {} actor A { func foo(e: S = S()) {} } func main(a: A) async { await a.foo() } (edited)

no output (edited)

norio_nomura

@swift-main @swift-6.0-dev @swift-5.10.1 "-strict-concurrency=complete" struct S: Sendable {} actor A { func foo(e: S = S()) {} } func main(a: A) async { await a.foo() } (edited)

no output (edited)

なんか=がエスケープされてるな。

Jul 26 11:36:50 swiftmain-discord-bot web-pcflp `executeTarget`: `/usr/bin/env -i PATH\=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin timeout --signal\=KILL 30 swift -strict-concurrency\=complete -` Jul 26 11:36:50 swift60-discord-bot web-fdnmh `executeTarget`: `/usr/bin/env -i PATH\=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin timeout --signal\=KILL 30 swift -strict-concurrency\=complete -` Jul 26 11:36:52 swift510-discord-bot web-cqtb2 `executeTarget`: `/usr/bin/env -i PATH\=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin timeout --signal\=KILL 30 swift -strict-concurrency\=complete -`

お。strict-concurrencyが効いてなかったのかな

2:41 AM

でもこれまでも時々テストされてたよなあ

\=はログへ書き出す際、string[]を繋げた時にエスケープされてるだけだ。

1

linux版だとオプションの位置に関係なく出ないぽい。

$ pbpaste|swift -strict-concurrency=complete - <stdin>:8:13: warning: sending 'self'-isolated value of type 'S' with later accesses to actor-isolated context risks causing data races; this is an error in the Swift 6 language mode 6 | 7 | func main(a: A) async { 8 | await a.foo() | `- warning: sending 'self'-isolated value of type 'S' with later accesses to actor-isolated context risks causing data races; this is an error in the Swift 6 language mode 9 | } $ pbpaste|docker run --rm swiftlang/swift:nightly swift -strict-concurrency=complete - $ pbpaste|docker run --rm swiftlang/swift:nightly-6.0-jammy swift -strict-concurrency=complete - $ pbpaste|docker run --rm swift swift -strict-concurrency=complete -

3:15 AM

linux版nightlyだと、標準入力じゃなくても出ない。

$ docker run -it --rm swiftlang/swift:nightly ################################################################ # # # Swift Nightly Docker Image # # Tag: swift-DEVELOPMENT-SNAPSHOT-2024-07-22-a # # # ################################################################ root@6db06d8b9690:/# echo 'struct S: Sendable {} actor A { func foo(e: S = S()) {} } func main(a: A) async { await a.foo() }'>a.swift root@6db06d8b9690:/# swift -strict-concurrency=complete a.swift root@6db06d8b9690:/# swift -version Swift version 6.0-dev (LLVM 3427f33b53c666b, Swift c21a3a974d40e14) Target: aarch64-unknown-linux-gnu

macOS版でも最新nightlyだと出ない。

$ pbpaste|swift20240724 -strict-concurrency=complete - 1 $ swift20240724 -strict-concurrency=complete (pbpaste|psub) 1 $ swift20240724 -version Apple Swift version 6.0-dev (LLVM 3c6e1d334961f5e, Swift 384d7f77a53d8a0) Target: arm64-apple-macosx15.0

3:26 AM

warningが出るのはXcode 16 betaだけ？

3:28 AM

これならば、とりあえずbotの修正は必要なさそう。

なるほど。結局もう上流では直ったバグなのか。ありがとうございます。 (edited)

標準入力から渡すと出なかったのが気になりますが。

@swift-main -module-name main -strict-concurrency=complete struct S: Sendable {} actor A { func foo(e: S = S()) {} } func main(a: A) async { await a.foo() }

Iceman

@swift-main -module-name main -strict-concurrency=complete struct S: Sendable {} actor A { func foo(e: S = S()) {} } func main(a: A) async { await a.foo() }

no output

norio_nomura

標準入力から渡すと出なかったのが気になりますが。

いや、これはオプションの順番のせいだったか。ファイル名以降のオプションは無視されてる。

これ、Xcode16 beta5 で警告が出なくなりました mainで直ってたので、想定通り。 (edited)

1

@swift-6.0-dev

struct S { func foo() -> Int { 42 } } let fooRef = S.foo for any in [0, S()] { guard let s = any as? S else { continue } fooRef(s) }

Iceman

@swift-6.0-dev

struct S { func foo() -> Int { 42 } } let fooRef = S.foo for any in [0, S()] { guard let s = any as? S else { continue } fooRef(s) }

exit status: 1 with <stdin>:13:5: error: function is unused 11 | continue 12 | } 13 | fooRef(s) | `- error: function is unused 14 | } 15 |

これ何のエラーだ？

5:59 AM

@swift-6.0-dev @swift-5.10.1 struct S { func foo() -> Int { 42 } } let fooRef = S.foo fooRef(S()) fooRef(S())() (edited)

Iceman

@swift-6.0-dev @swift-5.10.1 struct S { func foo() -> Int { 42 } } let fooRef = S.foo fooRef(S()) fooRef(S())() (edited)

exit status: 1 with

<stdin>:8:1: error: function is unused 6 | 7 | let fooRef = S.foo 8 | fooRef(S()) | `- error: function is unused 9 | fooRef(S())() 10 | <stdin>:9:1: warning: result of call to function returning 'Int' is unused 7 | let fooRef = S.foo 8 | fooRef(S()) 9 | fooRef(S())() | `- warning: result of call to function returning 'Int' is unused 10 |

(edited)

呼び出さないとエラーになる？

関数がポンと書いてあるのってエラーなんじゃない？

6:01 AM

単にこういう事じゃないかしら

Iceman

@swift-6.0-dev @swift-5.10.1 struct S { func foo() -> Int { 42 } } let fooRef = S.foo fooRef(S()) fooRef(S())() (edited)

exit status: 1 with

<stdin>:8:1: error: function is unused fooRef(S()) ^~~~~~~~~~~ <stdin>:9:1: warning: result of call to function returning 'Int' is unused fooRef(S())() ^ ~~

ほんまや。そうだったんですね

メタタイプメンバからレシーバだけ束縛すると呼び出してないメソッドが取り残されるからこうなる

6:03 AM

_ = foo なら許されたから

6:03 AM

関数を返す副作用のある関数を使って返り値の放置が問題になる場合は _ = が良さそうね (edited)

気になったのはエラーになったところなんですよね。

6:03 AM

未使用は普段は警告なので。

6:03 AM

ライフサイクル系の何かで問題になるのかと思いました

6:04 AM

返り値が関数のときはエラーに昇格するみたいですね

Iceman

ライフサイクル系の何かで問題になるのかと思いました

ライフサイクルは別に大丈夫だと思います。もしダメだとすると Any に関数を入れて放置したら壊れるということになってしまう。単に呼び出し忘れだろうという判断をしているのだと思います。

ありがとうございます。たまたまこの例だけコンパイラの主張が激しいのかな

急に性格が変わった感じはしますね。別に問題が起きるわけじゃないから警告で良さそう。 (edited)

6:08 AM

診断メッセージも英文がシンプルすぎるし。

@swift-main func main() { {} }

Yuta Saito

@swift-main func main() { {} }

exit status: 1 with

<stdin>:2:3: error: closure expression is unused 1 | func main() { 2 | {} | |- error: closure expression is unused | `- note: did you mean to use a 'do' statement? 3 | } 4 |

クロージャだとちょっと違うんだ。でもエラーなのは同じか。 (edited)

クロージャと関数はエラーっぽい。まあ大抵書き間違いだからな。 https://github.com/swiftlang/swift/blob/e21c117831738abeee5813420d828f5dccb24616/lib/Sema/TypeCheckStmt.cpp#L1882 https://github.com/swiftlang/swift/blob/e21c117831738abeee5813420d828f5dccb24616/lib/Sema/TypeCheckStmt.cpp#L2080 (edited)

「書き間違いだろう」系って他にエラーになるのって何があったっけ

6:28 AM

普通は警告になる気がする

@swift-main struct S { let foo: Int } func main() { \S.foo }

Yuta Saito

@swift-main struct S { let foo: Int } func main() { \S.foo }

exit status: 1 with

<stdin>:6:3: error: result of key path is unused 4 | 5 | func main() { 6 | \S.foo | `- error: result of key path is unused 7 | } 8 |

おおー

keypathもダメなんやｗ

6:31 AM

これはええんか。

DiagnosticsSema.def見てるとwarningでも良さそうなやつ結構ありますね

都度都度実装されててブレがありそうだ

実装者の気持ち次第

個人的にはこういうの気持ち悪いけど、まあブレてた結果ユーザがとても困るってわけでもないか

@swift-5.10.1 -strict-concurrency=complete class R { func foo() async {} } Task { @MainActor () in let r = R() await r.foo() }

omochimetaru

@swift-5.10.1 -strict-concurrency=complete class R { func foo() async {} } Task { @MainActor () in let r = R() await r.foo() }

<stdin>:5:9: warning: passing argument of non-sendable type 'R' outside of main actor-isolated context may introduce data races await r.foo() ^ <stdin>:1:7: note: class 'R' does not conform to the 'Sendable' protocol class R { func foo() async {} } ^

@swift-main @swift-6.0-dev @swift-5.10.1 "-strict-concurrency=complete"

class Repository { func doSomething() async { } } Task { @MainActor in let repository = Repository() await repository.doSomething() }

kntk

@swift-main @swift-6.0-dev @swift-5.10.1 "-strict-concurrency=complete"

class Repository { func doSomething() async { } } Task { @MainActor in let repository = Repository() await repository.doSomething() }

<stdin>:8:11: warning: passing argument of non-sendable type 'Repository' outside of main actor-isolated context may introduce data races await repository.doSomething() ^ <stdin>:1:7: note: class 'Repository' does not conform to the 'Sendable' protocol class Repository { ^

kntk

@swift-main @swift-6.0-dev @swift-5.10.1 "-strict-concurrency=complete"

class Repository { func doSomething() async { } } Task { @MainActor in let repository = Repository() await repository.doSomething() }

no output

kntk

@swift-main @swift-6.0-dev @swift-5.10.1 "-strict-concurrency=complete"

class Repository { func doSomething() async { } } Task { @MainActor in let repository = Repository() await repository.doSomething() }

no output

あれ～

selfがbondary越してるって怒られるんですよメソッドは第一引数にSelfが入った関数だから、selfをnon-isolatedに渡してて怒られているって解釈してますが (edited)

@swift-5.10.1 -strict-concurrency=complete class R { func foo() async {} } @MainActor func main() async { Task { @MainActor () in let r = R() await r.foo() } } (edited)

omochimetaru

@swift-5.10.1 -strict-concurrency=complete class R { func foo() async {} } @MainActor func main() async { Task { @MainActor () in let r = R() await r.foo() } } (edited)

<stdin>:7:11: warning: passing argument of non-sendable type 'R' outside of main actor-isolated context may introduce data races await r.foo() ^ <stdin>:1:7: note: class 'R' does not conform to the 'Sendable' protocol class R { func foo() async {} } ^

あー

2:01 PM

fooがnonisolatedなのか

ですです

逆の事考えてた　なるほど

なるほどー。 foo は async だからisolation domainがnon-isolatedになるから、 MainActorからisolation boundaryをまたいでnon-Sendableな self （ r ）を渡してることになるのか。そして、region based isolationで安全なことが確認されてSwift 6だとエラーにならなくなると。 (edited)

1

@swift-6.0-dev -swift-version 5 -strict-concurrency=complete class R { func foo() async {} } @MainActor func main() async { Task { @MainActor () in let r = R() await r.foo() } }

koher

@swift-6.0-dev -swift-version 5 -strict-concurrency=complete class R { func foo() async {} } @MainActor func main() async { Task { @MainActor () in let r = R() await r.foo() } }

<stdin>:5:11: warning: extraneous whitespace between attribute name and '('; this is an error in the Swift 6 language mode 3 | @MainActor 4 | func main() async { 5 | Task { @MainActor () in | `- warning: extraneous whitespace between attribute name and '('; this is an error in the Swift 6 language mode 6 | let r = R() 7 | await r.foo()

ああ、これまったく関係のない警告か

7:37 AM

() が @MainActor に付いてると認識されてるのか

@swift-main import Foundation print(DispatchQueue.concurrentPerform)

Iceman

@swift-main import Foundation print(DispatchQueue.concurrentPerform)

(Function)

koher

() が @MainActor に付いてると認識されてるのか

あれ、 @MainActor () in は間違い？

omochimetaru

あれ、 @MainActor () in は間違い？

っぽいですね。 @MainActor () -> Void in はいいみたいだけど。パースのルールが変わったのかな？

全く書かないか、お尻まで書くか、か。

1

omochimetaru

全く書かないか、お尻まで書くか、か。

（beta4で）試してみたら @MainActor() () in でもいいみたい

(edited)

@swift-6.0-dev @swift-main

class Repository { var value: Int = 0 func doSomething() async { value += 1 } } Task { @MainActor in let repository = Repository() await repository.doSomething() repository.value += 1 }

koher

@swift-6.0-dev @swift-main

class Repository { var value: Int = 0 func doSomething() async { value += 1 } } Task { @MainActor in let repository = Repository() await repository.doSomething() repository.value += 1 }

no output

koher

@swift-6.0-dev @swift-main

class Repository { var value: Int = 0 func doSomething() async { value += 1 } } Task { @MainActor in let repository = Repository() await repository.doSomething() repository.value += 1 }

no output

@swift-6.0-dev @swift-main -swift-version 6

class Repository { var value: Int = 0 func doSomething() async { value += 1 } } Task { @MainActor in let repository = Repository() await repository.doSomething() repository.value += 1 }

koher

@swift-6.0-dev @swift-main -swift-version 6

class Repository { var value: Int = 0 func doSomething() async { value += 1 } } Task { @MainActor in let repository = Repository() await repository.doSomething() repository.value += 1 }

no output

koher

@swift-6.0-dev @swift-main -swift-version 6

class Repository { var value: Int = 0 func doSomething() async { value += 1 } } Task { @MainActor in let repository = Repository() await repository.doSomething() repository.value += 1 }

no output

よくわからなくなってきた。なんでこれ通るんですっけ？

koher

（beta4で）試してみたら @MainActor() () in でもいいみたい

(edited)

なにそれ？そこにカッコつくのか

koher

よくわからなくなってきた。なんでこれ通るんですっけ？

これ許せるんですね nonisolated側で何にも捕まらないことがわかるから戻って来れるのか・・・？

await してるから確かに同時には起こらないか。

あっち側で状態に捕まるとダメなんですけど

9:09 AM

うーんでもstaticなactorに捕まる可能性があるよな、なんだろう

あっち側で状態に捕まったとしても、actorを超えられないからいいんじゃないですか？

あーSendableじゃないからそういう事はないのか

@swift-6.0-dev @swift-main -swift-version 6

class Repository { var value: Int = 0 func doSomething() async { value += 1 } } let task = Task { @MainActor in let repository = Repository() async let x: Void = repository.doSomething() repository.value += 1 await x print(repository.value) } await task.value

(edited)

koher

@swift-6.0-dev @swift-main -swift-version 6

class Repository { var value: Int = 0 func doSomething() async { value += 1 } } let task = Task { @MainActor in let repository = Repository() async let x: Void = repository.doSomething() repository.value += 1 await x print(repository.value) } await task.value

(edited)

exit status: 1 with

<stdin>:11:26: error: sending 'repository' risks causing data races 9 | let task = Task { @MainActor in 10 | let repository = Repository() 11 | async let x: Void = repository.doSomething() | |- error: sending 'repository' risks causing data races | `- note: sending 'repository' into async let risks causing data races between async let uses and local uses 12 | repository.value += 1 | `- note: access can happen concurrently 13 | await x 14 | print(repository.value)

koher

@swift-6.0-dev @swift-main -swift-version 6

class Repository { var value: Int = 0 func doSomething() async { value += 1 } } let task = Task { @MainActor in let repository = Repository() async let x: Void = repository.doSomething() repository.value += 1 await x print(repository.value) } await task.value

(edited)

exit status: 1 with

<stdin>:11:26: error: sending 'repository' risks causing data races 9 | let task = Task { @MainActor in 10 | let repository = Repository() 11 | async let x: Void = repository.doSomething() | |- error: sending 'repository' risks causing data races | `- note: sending 'repository' into async let risks causing data races between async let uses and local uses 12 | repository.value += 1 | `- note: access can happen concurrently 13 | await x 14 | print(repository.value)

1

えー、手元だとエラーにならなかったのに・・・。beta 4だから？

9:30 AM

@swift-6.0-dev @swift-main -swift-version 6

class Repository { var value: Int = 0 func doSomething() async { value += 1 } } Task { @MainActor in let repository = Repository() async let x: Void = repository.doSomething() repository.value += 1 await x }

koher

@swift-6.0-dev @swift-main -swift-version 6

class Repository { var value: Int = 0 func doSomething() async { value += 1 } } Task { @MainActor in let repository = Repository() async let x: Void = repository.doSomething() repository.value += 1 await x }

exit status: 1 with

<stdin>:11:26: error: sending 'repository' risks causing data races 9 | Task { @MainActor in 10 | let repository = Repository() 11 | async let x: Void = repository.doSomething() | |- error: sending 'repository' risks causing data races | `- note: sending 'repository' into async let risks causing data races between async let uses and local uses 12 | repository.value += 1 | `- note: access can happen concurrently 13 | await x 14 | }

koher

@swift-6.0-dev @swift-main -swift-version 6

class Repository { var value: Int = 0 func doSomething() async { value += 1 } } Task { @MainActor in let repository = Repository() async let x: Void = repository.doSomething() repository.value += 1 await x }

exit status: 1 with

<stdin>:11:26: error: sending 'repository' risks causing data races 9 | Task { @MainActor in 10 | let repository = Repository() 11 | async let x: Void = repository.doSomething() | |- error: sending 'repository' risks causing data races | `- note: sending 'repository' into async let risks causing data races between async let uses and local uses 12 | repository.value += 1 | `- note: access can happen concurrently 13 | await x 14 | }

@swift-6.0-dev @swift-main -swift-version 6

class Repository { var value: Int = 0 func doSomething() async { value += 1 } } Task { @MainActor in let repository = Repository() async let x: Void = repository.doSomething() // repository.value += 1 await x }

koher

@swift-6.0-dev @swift-main -swift-version 6

class Repository { var value: Int = 0 func doSomething() async { value += 1 } } Task { @MainActor in let repository = Repository() async let x: Void = repository.doSomething() // repository.value += 1 await x }

no output

koher

@swift-6.0-dev @swift-main -swift-version 6

class Repository { var value: Int = 0 func doSomething() async { value += 1 } } Task { @MainActor in let repository = Repository() async let x: Void = repository.doSomething() // repository.value += 1 await x }

no output

かしこいな

koher

えー、手元だとエラーにならなかったのに・・・。beta 4だから？

beta5が出てますよ

omochimetaru

beta5が出てますよ

うん、評判悪そうだったからまだアップデートしてないです

なるほど

omochimetaru

あっち側で状態に捕まるとダメなんですけど

「あっち側で状態に捕まる」というのはどういう状況を指してますか？ (edited)

koher

「あっち側で状態に捕まる」というのはどういう状況を指してますか？ (edited)

たとえばdosomethingメソッドがアクターを引数に取ってて、そのアクターのプロパティにselfを渡すような状況を考えていましたでもアクターには渡せないか

9:51 AM

メソッドの内部でselfがエスケープするという意味ですね

9:52 AM

Region Based Isolationのプロポーザルを見ると、孤立できてないから渡せない、みたいな例があるんですよね具体的には形を覚えてないです

class Foo { var value: Int = 0 } actor Bar { private let foo: Foo var value: Int { foo.value } init(foo: Foo) { self.foo = foo // fooはこのactorのdomainで保持される } } Task { @MainActor in let foo: Foo = .init() let bar: Bar = .init(foo: foo) // fooがbarのdomainに転送される foo.value += 1 // ここでfooに触るとdata raceを引き起こし得るので前の行の転送がエラー print(await bar.value) }

↑こういう別のisolation domainに転送されて保持されるような話かな？

お、そうです

10:34 AM

でもこれはこっち側で渡してますね

10:34 AM

fooのメソッドの中の処理で渡すような形をイメージしてました

SEで該当するサンプルコードはこれですかね disconnected->task-isolated->disconnected https://github.com/swiftlang/swift-evolution/blob/main/proposals/0414-region-based-isolation.md#weak-transfers-nonisolated-functions-and-disconnected-isolation-regions

func nonIsolatedCallee(_ x: NonSendable) async { ... } func useValue(_ x: NonSendable) { ... } @MainActor func transferToMainActor<T>(_ t: T) { ... } actor MyActor { var state: NonSendable func example() async { // Regions: [{(), self}] let x = NonSendable() // Regions: [(x), {(), self}] // While nonIsolatedCallee executes the regions are: // Regions: [{(x), Task}, {(), self}] await nonIsolatedCallee(x) // Once it has finished executing, 'x' is disconnected again // Regions: [(x), {(), self}] // 'x' can be used since it is disconnected again. useValue(x) // (1) // 'x' can be transferred since it is disconnected again. await transferToMainActor(x) // (2) // Error! After transferring to main actor, permanently // in main actor, so we can't use it. useValue(x) // (3) } }

swift-evolution/proposals/0414-region-based-isolation.md at main · ...

This maintains proposals for changes and user-visible enhancements to the Swift Programming Language. - swiftlang/swift-evolution

1

10:46 AM

Repository.doSomething内でselfがtask-isolatedになっていて task-isolatedは他のtask-isolatedにもactor-isolatedにも結合できないルールによって守られているので、呼び出し終了後にdisconnectedに戻せる、って感じでしょうか

今度ちゃんと読んでみるアルゴリズムで書かれてて意図がよくわからなかったんだよな

1

@swift-main let f = { @MainActor(hogehoge) () in }

omochimetaru

@swift-main let f = { @MainActor(hogehoge) () in }

no output

@swift-main let f = { @MainActor(今日はカレーを食べよう) () in }

omochimetaru

@swift-main let f = { @MainActor(今日はカレーを食べよう) () in }

no output

神経が通ってない秘孔だ。

草

@swift-main @swift-6.0-dev @swift-5.10.1 let f: @MainActor (Int) async -> Void = { @MainActor (a: Int) in print(a) }

omochimetaru

@swift-main @swift-6.0-dev @swift-5.10.1 let f: @MainActor (Int) async -> Void = { @MainActor (a: Int) in print(a) }

exit status: 1 with

<stdin>:1:44: warning: extraneous whitespace between attribute name and '('; this is an error in the Swift 6 language mode 1 | let f: @MainActor (Int) async -> Void = { @MainActor (a: Int) in print(a) } | `- warning: extraneous whitespace between attribute name and '('; this is an error in the Swift 6 language mode 2 | <stdin>:1:72: error: cannot find 'a' in scope 1 | let f: @MainActor (Int) async -> Void = { @MainActor (a: Int) in print(a) } | `- error: cannot find 'a' in scope 2 | <stdin>:1:41: error: contextual type for closure argument list expects 1 argument, which cannot be implicitly ignored 1 | let f: @MainActor (Int) async -> Void = { @MainActor (a: Int) in print(a) } | `- error: contextual type for closure argument list expects 1 argument, which cannot be implicitly ignored 2 |

omochimetaru

@swift-main @swift-6.0-dev @swift-5.10.1 let f: @MainActor (Int) async -> Void = { @MainActor (a: Int) in print(a) }

exit status: 1 with

<stdin>:1:44: warning: extraneous whitespace between attribute name and '('; this is an error in the Swift 6 language mode 1 | let f: @MainActor (Int) async -> Void = { @MainActor (a: Int) in print(a) } | `- warning: extraneous whitespace between attribute name and '('; this is an error in the Swift 6 language mode 2 | <stdin>:1:72: error: cannot find 'a' in scope 1 | let f: @MainActor (Int) async -> Void = { @MainActor (a: Int) in print(a) } | `- error: cannot find 'a' in scope 2 | <stdin>:1:41: error: contextual type for closure argument list expects 1 argument, which cannot be implicitly ignored 1 | let f: @MainActor (Int) async -> Void = { @MainActor (a: Int) in print(a) } | `- error: contextual type for closure argument list expects 1 argument, which cannot be implicitly ignored 2 |

omochimetaru

@swift-main @swift-6.0-dev @swift-5.10.1 let f: @MainActor (Int) async -> Void = { @MainActor (a: Int) in print(a) }

exit status: 1 with

<stdin>:1:72: error: cannot find 'a' in scope let f: @MainActor (Int) async -> Void = { @MainActor (a: Int) in print(a) } ^ <stdin>:1:41: error: contextual type for closure argument list expects 1 argument, which cannot be implicitly ignored let f: @MainActor (Int) async -> Void = { @MainActor (a: Int) in print(a) } ^ _ in

@swift-main @swift-6.0-dev @swift-5.10.1 let f: @MainActor (Int) async -> Void = { @MainActor (a: Int) -> Void in print(a) }

omochimetaru

@swift-main @swift-6.0-dev @swift-5.10.1 let f: @MainActor (Int) async -> Void = { @MainActor (a: Int) -> Void in print(a) }

no output

omochimetaru

@swift-main @swift-6.0-dev @swift-5.10.1 let f: @MainActor (Int) async -> Void = { @MainActor (a: Int) -> Void in print(a) }

no output

omochimetaru

@swift-main @swift-6.0-dev @swift-5.10.1 let f: @MainActor (Int) async -> Void = { @MainActor (a: Int) -> Void in print(a) }

no output

async/await 関連

actor 関連

`async/await` 関連

`actor` 関連