Introduce a new ABI.VersionNumber type.
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This PR introduces and plumbs through an internal `ABI.VersionNumber` type that represents the JSON event stream version that should be used during a test run. This type supports integers (such as the current version 0) and semantic versions (e.g. 6.3 or 6.3.0). Care is taken to ensure backwards compatibility for ABI versions -1 and 0 which do not accept a string in this position. > [!WARNING] > For technical reasons involving `__CommandLineArguments_v0`, this type is > exposed publicly as `__ABIVersionNumber`. This typealias may be removed in a > future update. The new type necessarily conforms to `Comparable` and `Codable`. It also conforms to `ExpressibleByIntegerLiteral` for compatibility with older versions of Xcode that set the `__CommandLineArguments_v0.eventStreamVersion` property to an integer literal value. For the moment, these are all implementation details that have no impact on our supported interface as there is no newer JSON schema than 0. We intend to make changes to the schema in the next Swift release (assumed to be 6.3) that will require a Swift Evolution review.
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…d 0) and public keyword
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stmontgomery
approved these changes
Jul 29, 2025
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macOS CI is backlogged. Tested at desk. |
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This PR introduces and plumbs through an internal
ABI.VersionNumbertype that represents the JSON event stream version that should be used during a test run. This type supports integers (such as the current version 0) and semantic versions (e.g. 6.3 or 6.3.0). Care is taken to ensure backwards compatibility for ABI versions -1 and 0 which do not accept a string in this position.The new type necessarily conforms to
ComparableandCodable. I've adjusted__CommandLineArguments_v0to support this new type while maintaining backwards-compatibility with Xcode 16.For the moment, these are all implementation details that have no impact on our supported interface as there is no newer JSON schema than 0. We intend to make changes to the schema in the next Swift release (assumed to be 6.3) that will require a Swift Evolution review.
Checklist: