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koher 6/26/2017 8:23 AM
Never がボトムタイプにならないのって誰も Proposal 書かないから？
8:23 AM
なんか前スレッドありましたよね。どうなったんだろ。
8:24 AM
https://github.com/apple/swift-evolution/blob/master/proposals/0102-noreturn-bottom-type.md#never-as-a-universal-bottom-subtype
apple/swift-evolution
swift-evolution - This maintains proposals for changes and user-visible enhancements to the Swift Programming Language.
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8:26 AM
An uninhabited type can be seen as a subtype of any other type ... This can be considered as a separate proposal.