SwiftFixIt: Skip duplicate insertion fix-its #8892
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AnthonyLatsis
requested review from
bnbarham,
xedin,
jakepetroules,
dschaefer2,
shawnhyam,
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plemarquand,
owenv,
bkhouri,
cmcgee1024 and
daveyc123
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@swift-ci please test macOS |
1 similar comment
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@swift-ci please test macOS |
xedin
approved these changes
Jul 7, 2025
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@swift-ci please test |
There are various scenarios — most notably involving protocol
compositions — where multiple different sites are diagnosed with the
same insertion fix-it. For example, compiling the following code with
`-enable-upcoming-feature InferIsolatedConformances:migrate` generates 2
warnings with equal fix-its for prepending `nonisolated` to the
composition:
```swift
protocol P {}
protocol Q {}
@mainactor struct S: P & Q {}
```
Applying both fix-its will produce invalid code:
`@MainActor struct S: nonisolated nonisolated P & Q {}`.
|
@swift-ci please test |
|
@swift-ci please test |
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@swift-ci please test Windows |
dschaefer2
approved these changes
Jul 9, 2025
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Motivation:
There are various scenarios — most notably involving protocol compositions — where multiple different sites are diagnosed with the same insertion fix-it. For example, compiling the following code with
-enable-upcoming-feature InferIsolatedConformances:migrategenerates 2 warnings with equal fix-its for prependingnonisolatedto the composition:Applying both fix-its will produce invalid code:
@MainActor struct S: nonisolated nonisolated P & Q {}.Modifications:
Use new
SwiftIDEUtils.applyparameter (swiftlang/swift-syntax#3121).Result:
Duplicate insertion fix-its are skipped.