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4bd5a1e4e1
While trying to fetch owner type for generic requirement failures anchored at assignment expression, use assignment source as an anchor because that's where requirements come from - conversion from source type to destination. Resolves: rdar://problem/51587755
25 lines
571 B
Swift
25 lines
571 B
Swift
// RUN: %target-typecheck-verify-swift
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protocol ViewDataSource: class {
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func foo<T>() -> [T]
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}
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class View {
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weak var delegate: ViewDataSource?
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}
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final class ViewController<T> {
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let view = View()
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init() {
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view.delegate = self
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// expected-error@-1 {{generic class 'ViewController' requires the types 'T' and 'String' be equivalent}}
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}
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}
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extension ViewController: ViewDataSource where T == String {
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// expected-note@-1 {{requirement from conditional conformance of 'ViewController<T>' to 'ViewDataSource'}}
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func foo<T>() -> [T] {
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return []
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}
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}
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