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2fd4c634ce
During protocol conformance checking, open the witness type in addition to the requirement type so we can match conformances for generic witnesses. Swift SVN r6367
42 lines
2.3 KiB
Swift
42 lines
2.3 KiB
Swift
// RUN: %swift -parse -verify %s
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protocol Runcible { func runce() }
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protocol Fungible { func funge() }
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protocol Ansible { func anse() }
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protocol NeedsGenericMethods {
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func oneArgNoConstraints<T>(x:T) // expected-note {{protocol requires function 'oneArgNoConstraints' with type '<T> (x : T) -> ()'}}
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func oneArgWithConstraint<T:Runcible>(x:T) // expected-note {{protocol requires function 'oneArgWithConstraint' with type '<T : Runcible> (x : T) -> ()'}}
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func oneArgWithConstraints<T:protocol<Runcible, Fungible>>(x:T) // expected-note {{protocol requires function 'oneArgWithConstraints' with type '<T : protocol<Fungible, Runcible>> (x : T) -> ()'}}
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func twoArgsOneVar<T>(x:T, y:T) // expected-note {{protocol requires function 'twoArgsOneVar' with type '<T> (x : T, y : T) -> ()'}}
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func twoArgsTwoVars<T, U>(x:T, y:U) // expected-note {{protocol requires function 'twoArgsTwoVars' with type '<T, U> (x : T, y : U) -> ()'}}
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}
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class EqualConstraints : NeedsGenericMethods {
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func oneArgNoConstraints<U>(x:U) {}
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func oneArgWithConstraint<U:Runcible>(x:U) {}
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func oneArgWithConstraints<U:protocol<Fungible, Runcible>>(x:U) {}
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func twoArgsOneVar<U>(x:U, y:U) {}
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func twoArgsTwoVars<V, U>(x:U, y:V) {}
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}
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class LooseConstraints : NeedsGenericMethods {
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func oneArgNoConstraints<U>(x:U) {}
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func oneArgWithConstraint<U>(x:U) {}
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func oneArgWithConstraints<U:Fungible>(x:U) {}
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func twoArgsOneVar<V, U>(x:U, y:V) {}
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func twoArgsTwoVars<V, U>(x:U, y:V) {}
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}
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class TooTightConstraints : NeedsGenericMethods { // expected-error{{type 'TooTightConstraints' does not conform to protocol 'NeedsGenericMethods'}}
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func oneArgNoConstraints<U:Runcible>(x:U) {} // expected-note{{candidate has non-matching type '<U : Runcible> (U) -> ()'}}
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func oneArgWithConstraint<U:Fungible>(x:U) {} // expected-note{{candidate has non-matching type '<U : Fungible> (U) -> ()'}}
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func oneArgWithConstraints<U:protocol<Runcible, Fungible, Ansible>>(x:U) {} // expected-note{{candidate has non-matching type '<U : protocol<Ansible, Fungible, Runcible>> (U) -> ()'}}
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func twoArgsOneVar<U:Runcible>(x:U) {} // expected-note{{candidate has non-matching type '<U : Runcible> (U) -> ()'}}
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func twoArgsTwoVars<U>(x:U, y:U) {} // expected-note{{candidate has non-matching type '<U> (U, U) -> ()'}}
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}
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