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ec4a125f3e
If the extension adds conformance to an invertible protocol, it's confusing for people to also infer conditional requirements on the generic parameters for those invertible protocols. This came up in the review of SE-427.
42 lines
2.2 KiB
Swift
42 lines
2.2 KiB
Swift
// RUN: %target-typecheck-verify-swift \
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// RUN: -enable-experimental-feature NonescapableTypes \
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// RUN: -enable-experimental-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 {}
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extension Fixed: Escapable where T: Escapable {}
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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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