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We diagnose usage of invalid existential types but we might still try to compute substitutions. Just whip up an ErrorType instead. Fixes <rdar://problem/16803384>. Swift SVN r29567
48 lines
647 B
Swift
48 lines
647 B
Swift
// RUN: not %target-swift-frontend %s -parse
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protocol P {
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func doSomething()
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typealias Y
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func doSomething2(Y)
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}
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protocol P2 : P {
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func doSomething3()
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}
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struct X {}
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class B<T> : P2 {
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func doSomething() { }
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typealias Y = T
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func doSomething2<T2>(t : T) { }
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func doSomething3() { }
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}
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func DoSomething<T : P, T2 where T2 == T.Y>(t : T, t2 : T2) {
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t.doSomething()
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t.doSomething2(t2)
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}
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func DoSomething2(p : P) {
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p.doSomething()
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}
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func DoSomething3<T : P2>(t : T) {
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t.doSomething3()
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}
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func DoSomething3(p2 : P2) {
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p2.doSomething3()
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}
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var b = B<X>()
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var x = X()
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DoSomething(b, t2: x)
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DoSomething2(b)
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DoSomething3(b)
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