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7aed042817
When simplifying a keypath constraint with a function type binding, single-parameter functions have the parameter type and the return type matched against the keypath root and value; whereas multiple-parameter functions cause an ambiguous failure (in `simplifyKeyPathConstraint`). Resolves rdar://problem/57930643
10 lines
469 B
Swift
10 lines
469 B
Swift
// RUN: %target-swift-frontend -typecheck -verify -primary-file %s
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// rdar://problem/57930643
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struct School {
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var name: String
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}
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func test<A, B>(_: (A, B) -> Bool) {} // expected-note {{in call to function 'test'}}
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test(\School.name) // expected-error {{generic parameter 'A' could not be inferred}} // expected-error {{generic parameter 'B' could not be inferred}} // expected-error {{cannot convert key path into a multi-argument function type '(A, B) -> Bool'}}
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