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[SR-15618] Closure typealiases cannot be attributed with @MainActor #57914

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swift-ci opened this issue Dec 18, 2021 · 0 comments
Open

[SR-15618] Closure typealiases cannot be attributed with @MainActor #57914

swift-ci opened this issue Dec 18, 2021 · 0 comments
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself

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Previous ID SR-15618
Radar None
Original Reporter lickel (JIRA User)
Type Bug
Environment

Swift 5.5

Additional Detail from JIRA
Votes 0
Component/s Compiler
Labels Bug
Assignee None
Priority Medium

md5: b18f22b31eef9ab686f5c9c8b28b35d0

Issue Description:

typealias SomeCallback = (Foo) -> Void
func doWork(callback: @mainactor SomeCallback) { ... }

This seems to be confusing the compiler with the error:

Unknown attribute 'MainActor'

I would have expected it to be identical to

func doWork(callback: @mainactor (Foo) -> Void) { ... }
@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself
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