https://github.com/apple/swift/pull/4087 放置PRですが。本体の方のFoudationオーバーレイにPR出してみた反応です。

[Foundation] Add hack enabling factory intializer by rintaro · Pull Request #4087 · apple/swift

What's in this pull request? I'm not sure this can be accepted or not. But this is convenient in some cases. Using that: Simplify copy constructor of NSSet and NSDictionary Eliminate getVaList fro...