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Code like that is usually indicative of programmer error, and does not round-trip through module interface files since there is no source syntax to refer to an outer generic parameter. For source compatibility this is a warning, but becomes an error with -swift-version 6. Fixes rdar://problem/108385980 and https://github.com/apple/swift/issues/62767.
27 lines
619 B
Swift
27 lines
619 B
Swift
// RUN: %target-typecheck-verify-swift
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// https://github.com/apple/swift/issues/53296
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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<U>() -> [U] {
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return []
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}
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}
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