Starting in Sierra, Apple's Mac-based OS is renamed to macOS. All user-facing Swift APIs must go through Swift Evolution. While this is a trivial API change, I have put together a formal proposal as is normal and usual for this process. Here is a draft for public comment.
-- Erica Gist: https://gist.github.com/erica/f53fa6cfef9e5cf17ab139f7528edde2 <https://gist.github.com/erica/f53fa6cfef9e5cf17ab139f7528edde2> Aliasing the OS X Platform Configuration Test Proposal: TBD Author: Erica Sadun <http://github.com/erica> Status: TBD Review manager: TBD <https://gist.github.com/erica/f53fa6cfef9e5cf17ab139f7528edde2#introduction>Introduction This proposal adds a #if os(macos) platform configuration test to Swift that acts like the current if os(osx) Swift Evolution Discussion: TBD <applewebdata://3E69BB01-4D94-4BA0-B211-ED51A7CBE547> <https://gist.github.com/erica/f53fa6cfef9e5cf17ab139f7528edde2#motivation>Motivation Apple renamed its Mac operating system from OSX to macOS, starting in macOS Sierra. Adding rather than replacing "OSX" enables this adoption to be purely additive and supports the notion that Swift-based applications could be deployed to operating systems earlier than Sierrra. <https://gist.github.com/erica/f53fa6cfef9e5cf17ab139f7528edde2#current-art>Current Art Swift currently supports the following platform configuration tests, defined in lib/Basic/LangOptions.cpp. The literals true and false The os() function that tests for OSX, iOS, watchOS, tvOS, Linux, Windows, Android, and FreeBSD The arch() function that tests for x86_64, arm, arm64, i386, powerpc64, s390x, and powerpc64le The swift() function that tests for specific Swift language releases, e.g. swift(>=2.2) <https://gist.github.com/erica/f53fa6cfef9e5cf17ab139f7528edde2#detailed-design>Detailed Design if (Target.isMacOSX()) { addPlatformConditionValue("os", "OSX"); addPlatformConditionValue("os", "macOS"); } <https://gist.github.com/erica/f53fa6cfef9e5cf17ab139f7528edde2#impact-on-existing-code>Impact on Existing Code This is purely additive <https://gist.github.com/erica/f53fa6cfef9e5cf17ab139f7528edde2#alternatives-considered>Alternatives Considered I think it's unwise to replace OSX instead of adding macOS due to Apple's large and active userbase that may install Swift-sourced software and not upgrade to the latest operating system.
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