Infer error conformance for type parameters used in typed throws #69181
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The type that occurs as the thrown error type must conform to the `Error` protocol. Infer this conformance when the type is a type parameter in the signature of a function.
DougGregor
requested review from
hborla,
slavapestov and
xedin
as code owners
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@swift-ci please smoke test |
slavapestov
approved these changes
Oct 14, 2023
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| // Inference of Error conformance from the use of a generic parameter in typed | ||
| // throws. | ||
| func requiresError<E: Error>(_: E.Type) { } |
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A -debug-generic-signatures | FileCheck test might be more direct than the requiresError() thing, but it probably doesn't matter
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The type that occurs as the thrown error type must conform to the
Errorprotocol. Infer this conformance when the type is a type parameter in the signature of a function.This lets us write, e.g.,
without needing the
E: Errorbit.