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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.
17 lines
1.0 KiB
Swift
17 lines
1.0 KiB
Swift
// RUN: %target-typecheck-verify-swift
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struct Outer<T, U> { // expected-note 2{{'T' previously declared here}}
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struct Inner<V> { // expected-note 2{{'V' previously declared here}}
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func foo<T>(_: T) {} // expected-warning {{generic parameter 'T' shadows generic parameter from outer scope with the same name; this is an error in Swift 6}}
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func bar<V>(_: V) {} // expected-warning {{generic parameter 'V' shadows generic parameter from outer scope with the same name; this is an error in Swift 6}}
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}
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}
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extension Outer.Inner {
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func baz<T>(_: T) {} // expected-warning {{generic parameter 'T' shadows generic parameter from outer scope with the same name; this is an error in Swift 6}}
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func quux<V>(_: V) {} // expected-warning {{generic parameter 'V' shadows generic parameter from outer scope with the same name; this is an error in Swift 6}}
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}
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extension Sequence {
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func bing<Self>(_: Self) {} // expected-warning {{generic parameter 'Self' shadows generic parameter from outer scope with the same name; this is an error in Swift 6}}
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} |