| // RUN: %target-typecheck-verify-swift |
| |
| func wantsError<T: Error>(_: T) {} |
| // expected-note@-1 {{required by global function 'wantsError' where 'T' = 'ErrorRefinement'}} |
| // expected-note@-2 {{required by global function 'wantsError' where 'T' = 'Error & OtherProtocol'}} |
| // expected-note@-3 {{required by global function 'wantsError' where 'T' = 'C & Error'}} |
| |
| func testSimple(error: Error) { |
| wantsError(error) |
| } |
| |
| protocol ErrorRefinement : Error {} |
| func testErrorRefinment(error: ErrorRefinement) { |
| wantsError(error) // expected-error {{value of protocol type 'ErrorRefinement' cannot conform to 'Error'; only struct/enum/class types can conform to protocols}} |
| } |
| |
| protocol OtherProtocol {} |
| func testErrorComposition(error: Error & OtherProtocol) { |
| wantsError(error) // expected-error {{value of protocol type 'Error & OtherProtocol' cannot conform to 'Error'; only struct/enum/class types can conform to protocols}} |
| } |
| |
| class C {} |
| func testErrorCompositionWithClass(error: Error & C) { |
| wantsError(error) // expected-error {{value of protocol type 'C & Error' cannot conform to 'Error'; only struct/enum/class types can conform to protocols}} |
| } |
