[6.2][SwiftParser] SE-0478: Implement using declaration under an experim…
#3093
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…ental feature This is an alternative spelling of `typealias DefaultIsolation = (MainActor | nonisolated)` that was proposed as part of SE-0478. `using` declaration accepts an attribute or a modifier and currently could be used to set a default actor isolation per file, but could be extended to support other use-cases in the future. Implementation uses `DefaultIsolationPerFile` experimental feature flag to hide the syntax. (cherry picked from commit 95bebf6)
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swiftlang/swift#81997 |
bnbarham
approved these changes
Jun 4, 2025
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…ental feature
Cherry-pick of #3087
Explanation:
This is an alternative spelling of
typealias DefaultIsolation = (MainActor | nonisolated)that was proposed as part of SE-0478.usingdeclaration accepts an attribute or a modifier and currently could be used to set a default actor isolation per file, but could be extended to support other use-cases in the future.Implementation uses
DefaultIsolationPerFileexperimental feature flag to hide the syntax.Resolves: rdar://152598259
Main Branch PR: [SwiftParser] SE-0478: Implement
usingdeclaration under an experim… #3087Risk: Low. This is a new feature under an experimental flag which isn't enabled by default and currently has no adopters.
Reviewed By: @hamishknight @ahoppen
Testing: Added new test-cases to the test suite.
(cherry picked from commit 95bebf6)