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Adopt @abi in the standard library #79937

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@beccadax beccadax commented Mar 12, 2025

This PR replaces eligible uses of @_silgen_name in stdlib/ with @abi. Because the API digester has a better understanding of @abi than @_silgen_name, this also affects the output of API digester tests run on the standard library; it should typically describe changes more accurately than it did before.

This PR also includes two commits with macro-related tests that were originally part of #80383 but cannot be merged without a SwiftSyntax change (either swiftlang/swift-syntax#3026 or the changes that will be made if SE-0476 is accepted).

Standard library reviewers: Review the final commit; ignore the others. You might also want to search the standard library for uses of @_silgen_name that I might have missed. (Remember, @abi is not designed to replace uses of @_silgen_name to assign an arbitrary string symbol, like swift_stdlib_getDescription.)

@beccadax beccadax force-pushed the abi-rewrote-your-history branch from 02b3318 to ed8e82d Compare March 13, 2025 21:32
@beccadax beccadax mentioned this pull request Mar 13, 2025
@beccadax beccadax force-pushed the abi-rewrote-your-history branch 2 times, most recently from d0e20f3 to fddc437 Compare April 17, 2025 23:53
@beccadax beccadax mentioned this pull request Apr 18, 2025
@beccadax beccadax force-pushed the abi-rewrote-your-history branch from fddc437 to b06f1be Compare April 18, 2025 22:01
@beccadax beccadax marked this pull request as ready for review April 18, 2025 22:19
@beccadax beccadax force-pushed the abi-rewrote-your-history branch from b06f1be to f93d4c0 Compare April 19, 2025 02:39
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@swift-ci please test

Additional tests for the previous commit “Diagnose CustomAttrs as needed in `@abi`”.
Additional tests for the previous commit “[Legacy parser] No freestanding macros in `@abi`”.
@beccadax beccadax force-pushed the abi-rewrote-your-history branch from f93d4c0 to f0d0fcd Compare April 21, 2025 21:21
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With swiftlang/swift-syntax#3062

@swift-ci please test

This commit enables the ABIAttribute feature in the standard library build and replaces (nearly) every instance of `@_silgen_name(<mangled Swift name>)` in stdlib/public with an `@abi` attribute.
@beccadax beccadax force-pushed the abi-rewrote-your-history branch from f0d0fcd to 6d29ef8 Compare April 22, 2025 00:40
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With swiftlang/swift-syntax#3062

@swift-ci please test

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Concurrency and Distributed changes look good AFAICS, thank you!

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