Here’s an explanation: https://github.com/apple/swift-evolution/blob/master/proposals/0143-conditional-conformances.md
Matt > On Dec 5, 2017, at 22:46, Седых Александр <s...@mail.ru> wrote: > > Please explain, what is conditional conformances with another words? > >> Среда, 6 декабря 2017, 6:32 +03:00 от Matt Whiteside via swift-users >> <swift-users@swift.org>: >> >> Hello Swift Users, >> >> [This is a resend with smaller attachment] Has anyone had luck passing the >> new '-enable-experimental-conditional-conformances' flag to Xcode? It works >> when I run swift from the command line, with the Dec. 5th snapshot >> toolchain, but not Xcode. I have tried whats in the screenshot below as >> well as adding -Xfrontend, but I’m still getting the usual ‘extension of >> protocol cannot have an inheritance clause’ error: >> >> Thanks for any suggestions on this, >> >> Matt >> >> >> >> >> _______________________________________________ >> swift-users mailing list >> swift-users@swift.org >> https://lists.swift.org/mailman/listinfo/swift-users >> > > --
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