6.0: [BitwiseCopyable] Drop req from SIMD/Storage. #73899
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There are conformers to SIMDStorage (like that in the added test case) which involve an Array (a type that can't conform to BitwiseCopyable). So lift the constraint on SIMDStorage. This in turn requires lifting the constraint on SIMD (otherwise, e.g. `SIMD8<Scalar>` would fail to conform since it has as a member some SIMD8Storage which is only constrained to conform to `SIMDStorage`; the `SIMD8Storage` associatedtype also cannot be constrained to `BitwiseCopyable` because that storage may again not conform as in the test example). rdar://128661878
stephentyrone
approved these changes
May 24, 2024
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@swift-ci please test |
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@swift-ci please test macos platform |
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Explanation: Remove the
BitwiseCopyableconstraint fromSIMDStorageandSIMD.Scope: Affects BitwiseCopyable checking of SIMD-related conformances.
Issue: rdar://128661878
Original PR: #73890
Risk: Low.
Testing: Adds a test case that should type-check.
Reviewer: Stephen Canon ( @stephentyrone )