[pull] swift/main from apple:swift/main #949
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The swift_attr attribute is a generic annotation attribute that's not used by clang, but is used by the Swift compiler. The Swift compiler can use these annotations to provide various syntactic and semantic sugars for the imported Objective-C API declarations. Differential Revision: https://reviews.llvm.org/D92354
The swift_async_name attribute provides a name for a function/method that can be used to call the async overload of this method from Swift. This name specified in this attribute assumes that the last parameter in the function/method its applied to is removed when Swift invokes it, as the the Swift's await/async transformation implicitly constructs the callback. Differential Revision: https://reviews.llvm.org/D92355 (cherry picked from commit eddd1d1)
in their corresponding class interfaces Categories that add protocol conformances to classes with direct members should prohibit protocol conformances when the methods/properties that the protocol expects are actually declared as 'direct' in the class. Differential Revision: https://reviews.llvm.org/D92602
New swift attributes + direct change
…esult _Nullable_result generally like _Nullable, except when being imported into a swift async method. rdar://70106409 Differential revision: https://reviews.llvm.org/D92495
[clang] Add a new nullability annotation for swift async: _Nullable_r…
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