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Whenever we form a potential archetype that is unresolved (because it names a member wasn't known at the time the potential archetype was formed), create a corresponding delayed requirement to resolve the potential archetype. This ensures that all potential archetypes get a chance to be resolve, fixing the nested type should have matched associated type assertion in rdar://problem/31401161 (and others).
19 lines
490 B
Swift
19 lines
490 B
Swift
// RUN: %target-typecheck-verify-swift
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// rdar://problem/31401161
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class C1 {}
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protocol P1 {
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associatedtype Element
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}
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protocol P2 : P1 {
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associatedtype SubSequence : P1 // expected-note{{'SubSequence' declared here}}
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}
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protocol P3 : P2 {
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associatedtype SubSequence : P2 // expected-warning{{redeclaration of associated type 'SubSequence' from protocol 'P2' is better expressed as a 'where' clause on the protocol}}
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}
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func foo<S>(_: S) where S.SubSequence.Element == C1, S : P3 {}
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