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bebac49cee
When we detect that a requirement source is self-derived, identify the redundant subpath and remove it to produce a new, smaller requirement source that computes the same result. We were doing this form the limited case where the redundant subpath ended at the end of the requirement source; generalize that notion. Fixes SR-5601.
25 lines
607 B
Swift
25 lines
607 B
Swift
// RUN: %target-swift-frontend %s -typecheck -verify
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// RUN: %target-swift-frontend %s -emit-ir -o /dev/null
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// SR-5601
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protocol P1 {
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associatedtype X: P3 where X.Q == Self, X.R == UInt8
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associatedtype Y: P3 where Y.Q == Self, Y.R == UInt16
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// NOTE: Removing either X or Y from P1 (and A) makes the program compile.
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}
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struct A: P1 {
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typealias X = S<UInt8>
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typealias Y = S<UInt16>
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}
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protocol P2 { }
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protocol P3 : P2 { // NOTE: Removing ": P2 " here makes the program compile.
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associatedtype Q: P1
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associatedtype R
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}
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struct S<E> : P3 {
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typealias R = E
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typealias Q = A
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}
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