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The underlying type for a typealias can be an unbound generic type, replace these with the bound generic equivalent. This avoids crashing when attempting to compute the type relation (in the future we'll want to open these type parameters for the comparison). rdar://147789214
37 lines
1.2 KiB
Swift
37 lines
1.2 KiB
Swift
// RUN: %batch-code-completion
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// rdar://147789214 - Make sure we insert generic parameters for underlying type.
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struct S<T> {}
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typealias Foo = S
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typealias Bar = Foo
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typealias Baz<T> = S<T>
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typealias Invalid = (S, S)
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struct Q<T> {
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struct S<U> {}
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}
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typealias Invalid2 = R<K>.S
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let _: S = #^COMPLETE^#
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// COMPLETE-DAG: Decl[TypeAlias]/CurrModule: Foo[#S<T>#]; name=Foo
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// COMPLETE-DAG: Decl[TypeAlias]/CurrModule: Bar[#S<T>#]; name=Bar
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// COMPLETE-DAG: Decl[TypeAlias]/CurrModule: Baz[#S<T>#]; name=Baz
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// COMPLETE-DAG: Decl[TypeAlias]/CurrModule: Invalid[#Invalid#]; name=Invalid
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// COMPLETE-DAG: Decl[TypeAlias]/CurrModule: Invalid2[#Invalid2#]; name=Invalid2
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struct R<U> {
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typealias X = S<U>
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typealias Y = S
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typealias Z<T> = S<T>
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func foo() {
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// TODO: Once we start comparing type relations for types with generic
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// parameters, ideally 'Y' and 'Z' should be convertible, but not 'X'.
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let _: S<Int> = #^COMPLETE_IN_TYPE^#
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// COMPLETE_IN_TYPE-DAG: Decl[TypeAlias]/CurrNominal: X[#S<U>#]; name=X
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// COMPLETE_IN_TYPE-DAG: Decl[TypeAlias]/CurrNominal: Y[#S<T>#]; name=Y
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// COMPLETE_IN_TYPE-DAG: Decl[TypeAlias]/CurrNominal: Z[#S<T>#]; name=Z
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}
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}
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