使えないぽい
$ docker run --privileged -it --rm norionomura/swift:4020170827a swift -I /usr/lib/swift/clang/include Welcome to Swift version 4.0-dev (LLVM 2dedb62a0b, Clang b9d76a314c, Swift 0899bd328a). Type :help for assistance. 1> import Foundation 2> let b = NSDecimalNumber(value: true) error: repl.swift:2:9: error: argument labels '(value:)' do not match any available overloads let b = NSDecimalNumber(value: true) ^ ~~~~~~~~~~~~~ repl.swift:2:9: note: overloads for 'NSDecimalNumber' exist with these partially matching parameter lists: (decimal: Decimal), (string: String?), (coder: NSCoder), (floatLiteral: Double), (booleanLiteral: Bool), (integerLiteral: Int) let b = NSDecimalNumber(value: true) ^ 3>
(edited)