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Require Swift 6.3, develop with Swift 6.4 - #76
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Swift 6.3 ships with Xcode 26.4, released in March 2026; the browser already builds with Xcode 27. The manifest's tools version, the Linux CI image and the README badge move to 6.3, and .swift-version to 6.4, the Swift of Xcode 27.
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What changed in this PR
Updates the repository’s declared Swift versions to require Swift 6.3 while using Swift 6.4 for local development tooling.
Changes:
- Bumps
Package.swifttools version to Swift 6.3. - Updates Linux CI container image to
swift:6.3. - Updates
.swift-versionto 6.4 and adjusts the README Swift badge to 6.3+.
| File | Description |
|---|---|
| README.md | Updates the Swift version badge to 6.3+. |
| Package.swift | Raises the SwiftPM tools version to 6.3. |
| .swift-version | Sets the developer/tooling Swift version to 6.4. |
| .github/workflows/ci.yml | Runs CI build in the swift:6.3 container. |
Review effort: Lite
| @@ -1 +1 @@ | |||
| 6.3 | |||
| 6.4 | |||
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| [](https://github.com/yandex/implicits/actions/workflows/ci.yml) | ||
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Swift 6.3 ships with Xcode 26.4, released in March 2026; the browser already builds with Xcode 27. The manifest's tools version, the Linux CI image and the README badge move to 6.3, and
.swift-versionto 6.4, the Swift of Xcode 27.The package builds and its tests pass with Swift 6.4.0 from Xcode 27 and with Swift 6.4.1 from swift.org on macOS, and with the CI steps in a
swift:6.3Linux container. SwiftFormat lints clean with.swift-versionat 6.4.