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3cc613497c
Extend new requirement failure diagnostics by adding "same-type" generic requirement failures.
53 lines
1.6 KiB
Swift
53 lines
1.6 KiB
Swift
// RUN: %target-typecheck-verify-swift
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protocol P {}
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struct S<T> {}
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class C : P {}
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extension S where T : P {
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// expected-note@-1 {{where 'T' = 'T'}}
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// expected-note@-2 {{where 'T' = 'Int'}}
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typealias A = Int
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typealias B<U> = S<U>
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}
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extension S where T == Float { // expected-note {{where 'T' = 'Int'}}
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typealias C = Int
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}
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class A<T, U> {}
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extension A where T == [U], U: P { // expected-note {{where 'U' = 'Float'}}
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typealias S1 = Int
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}
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extension A where T == [U], U == Int {
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// expected-note@-1 {{where 'U' = 'String'}}
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// expected-note@-2 {{where 'T' = '[String]'}}
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typealias S2 = Int
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}
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class B<U> : A<[U], U> {}
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_ = B<C>.S1() // Ok
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_ = B<Int>.S2() // Ok
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_ = B<Float>.S1() // expected-error {{referencing type alias 'S1' on 'A' requires that 'Float' conform to 'P'}}
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_ = B<String>.S2()
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// expected-error@-1 {{referencing type alias 'S2' on 'A' requires the types '[String]' and '[Int]' be equivalent}}
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// expected-error@-2 {{referencing type alias 'S2' on 'A' requires the types 'String' and 'Int' be equivalent}}
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_ = S<C>.A() // Ok
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_ = S<Int>.A() // expected-error {{referencing type alias 'A' on 'S' requires that 'Int' conform to 'P'}}
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_ = S<String>.B<Int>() // expected-error {{type 'String' does not conform to protocol 'P'}}
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_ = S<Int>.C() // expected-error {{referencing type alias 'C' on 'S' requires the types 'Int' and 'Float' be equivalent}}
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func foo<T>(_ s: S<T>.Type) {
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_ = s.A() // expected-error {{referencing type alias 'A' on 'S' requires that 'T' conform to 'P'}}
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}
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func bar<T: P>(_ s: S<T>.Type) {
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_ = s.A() // Ok
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}
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