[cxx-interop] Allow old spelling of AppKit constants #83568
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AppKit defines certain constants in Objective-C, and then renames them into different constants in Swift, e.g. `NSUpArrowFunctionKey` is renamed into `NSEvent.SpecialKey.upArrow.rawValue`. In addition to that, AppKit also re-defines these constants in pure-Swift, which isn't the intended mechanism for renaming such constants. Prior to llvm/llvm-project#145947, Clang was silently dropping the `SwiftName` API Notes attributes on these constants due to a bug in the name validation mechanism. Clients of AppKit relied on that behavior and continued to use the old spelling in Swift. To preserve source compatibility and avoid a deprecation error, let's continue dropping the `SwiftName` attribute on select constants from AppKit. rdar://157485334
egorzhdan
requested review from
fahadnayyar,
susmonteiro,
hnrklssn,
beccadax and
ian-twilightcoder
as code owners
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@swift-ci please test |
ktoso
approved these changes
Aug 6, 2025
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@swift-ci please test macOS |
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@swift-ci please test Windows |
Xazax-hun
approved these changes
Aug 7, 2025
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AppKit defines certain constants in Objective-C, and then renames them into different constants in Swift, e.g.
NSUpArrowFunctionKeyis renamed intoNSEvent.SpecialKey.upArrow.rawValue.In addition to that, AppKit also re-defines these constants in pure-Swift, which isn't the intended mechanism for renaming such constants.
Prior to llvm/llvm-project#145947, Clang was silently dropping the
SwiftNameAPI Notes attributes on these constants due to a bug in the name validation mechanism. Clients of AppKit relied on that behavior and continued to use the old spelling in Swift. To preserve source compatibility and avoid a deprecation error, let's continue dropping theSwiftNameattribute on select constants from AppKit.rdar://157485334