こいつですね https://github.com/apple/swift-evolution/blob/main/proposals/0286-forward-scan-trailing-closures.md#mitigating-the-source-compatibility-impact-swift--6

swift-evolution/proposals/0286-forward-scan-trailing-closures.md at...

This maintains proposals for changes and user-visible enhancements to the Swift Programming Language. - apple/swift-evolution

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