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As specified by the SE-0446 acceptance, extensions that declare a type's conditional `Copyable` or `Escapable` ability must reiterate explicitly all of the `Copyable` and/or `Escapable` requirements, whether required or not required (by e.g. `~Copyable`) that were suppressed in the original type declaration.
43 lines
2.2 KiB
Swift
43 lines
2.2 KiB
Swift
// RUN: %target-typecheck-verify-swift \
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// RUN: -enable-experimental-feature SuppressedAssociatedTypes
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// REQUIRES: swift_feature_SuppressedAssociatedTypes
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protocol P {}
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protocol Q {}
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class DoggoClass {}
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struct Blah<T: ~Copyable & ~Escapable>: ~Copyable, ~Escapable {}
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extension Blah: Copyable where T: Copyable & Escapable {}
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// expected-error@-1 {{conditional conformance to suppressible protocol 'Copyable' cannot depend on 'T: Escapable'}}
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extension Blah: Escapable where T: Copyable, T: Escapable {}
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// expected-error@-1 {{conditional conformance to suppressible protocol 'Escapable' cannot depend on 'T: Copyable'}}
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struct Fixed<T: ~Copyable & ~Escapable>: ~Copyable, ~Escapable {}
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extension Fixed: Copyable where T: Copyable, T: ~Escapable {}
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extension Fixed: Escapable where T: Escapable, T: ~Copyable {}
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struct TryConformance<Whatever: ~Copyable>: ~Copyable {}
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extension TryConformance: Copyable
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where Whatever: P, Whatever: Q, Whatever: Sendable {}
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// expected-error@-2 {{conditional conformance to suppressible protocol 'Copyable' cannot depend on 'Whatever: P'}}
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// expected-error@-3 {{conditional conformance to suppressible protocol 'Copyable' cannot depend on 'Whatever: Q'}}
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// expected-error@-4 {{conditional conformance to suppressible protocol 'Copyable' cannot depend on 'Whatever: Sendable'}}
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struct TrySameType<Whatever: ~Copyable>: ~Copyable {}
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extension TrySameType: Copyable
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where Whatever == Int {}
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// expected-error@-2 {{conditional conformance to suppressible protocol 'Copyable' cannot depend on 'Whatever == Int'}}
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struct TryClassAndLayoutConstraints<Whatever: ~Copyable, Heckin>: ~Copyable {}
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extension TryClassAndLayoutConstraints: Copyable
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where Heckin: DoggoClass, Whatever: AnyObject {}
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// expected-error@-2 {{conditional conformance to suppressible protocol 'Copyable' cannot depend on 'Whatever: AnyObject'}}
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// expected-error@-3 {{conditional conformance to suppressible protocol 'Copyable' cannot depend on 'Heckin: DoggoClass'}}
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protocol Queue: ~Copyable { associatedtype Job: ~Copyable }
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struct Scheduler<Q: Queue>: ~Copyable {}
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extension Scheduler: Copyable where Q.Job: Copyable {}
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// expected-error@-1 {{conditional conformance to suppressible protocol 'Copyable' cannot depend on 'Q.Job: Copyable'}}
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