[6.2][SE-0461] Replace `@execution(...)` with `@concurrent` and `nonisolated(nonsending)`#80807

Merged

xedin merged 15 commits intoswiftlang:release/6.2from

xedin:se-0461-renamings-6.2

Apr 17, 2025

Commits on Apr 16, 2025

[Diagnostics] Adjust `@execution(...)` diagnostic to take `DeclAttribute` or `StringRef`
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[AST/ASTGen] Introduce `@concurrent` attribute to replace `@execution(concurrent)` spelling
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[Parse] Remove warning about `@concurrent` being alternative to `@Sendable`
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[AST/Sema] Support for `@concurrent` attribute in type context
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[AST/Sema] Replace `@execution(concurrent)` with `@concurrent`
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[AST/Sema] Intoduce `nonisolated(nonsending)` as a replacement for `@execution(caller)`
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[AST/Parse] Implement `nonisolated(nonsending)` type modifier
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[AST/ASTGen/Sema/Serialization] Remove `@execution` attribute
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[Sema/SILGen] NFC: Remove all mentions of `@execution` from comments
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[AST] Remove `ExecutionAttribute` experimental feature
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[AST] NFC: Add a convenient way to create implicit `NonisolatedAttr`s
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[Parse] Tighten constraints in `canParseNonisolatedAsTypeModifier`
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[Diagnostics] Update educational note for `AsyncCallerExecution` feature to match `@execution` attribute split
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[Frontend] Add a feature to guard use of `@concurrent` and `nonisolated(nonsending)` in swift interface files
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[Docs] NFC: Remove last remaining references to `@execution` attribute
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