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// RUN: %target-swift-frontend -typecheck %s -debug-generic-signatures 2>&1 | %FileCheck %s
// RUN: %target-swift-frontend -typecheck %s -debug-generic-signatures -disable-requirement-machine-concrete-contraction 2>&1 | %FileCheck %s
protocol P1 {
associatedtype T
}
protocol P2 {}
protocol P3 {
associatedtype T : P2, P3
}
protocol P4 : P3 {}
protocol P5 : P4 {}
struct C : P2, P5 {
typealias T = C
}
struct G<T: P5> : P1 {}
// CHECK-LABEL: concrete_nesting_elimination_order.(file).P6@
// CHECK-NEXT: Requirement signature: <Self where Self.[P6]X : P1, Self.[P6]Y : P5, Self.[P6]Y == Self.[P6]Z.[P1]T, Self.[P6]Z : P1>
protocol P6 {
associatedtype X : P1
associatedtype Y : P5
associatedtype Z : P1 where Z.T == Y
}
// CHECK-LABEL: concrete_nesting_elimination_order.(file).P7@
// CHECK-NEXT: Requirement signature: <Self where Self : P6, Self.[P6]X == G<Self.[P6]Y>, Self.[P6]Z == G<Self.[P6]Y>>
protocol P7 : P6 where X == G<Y>, X == Z {}
// CHECK-LABEL: concrete_nesting_elimination_order.(file).P8a@
// CHECK-NEXT: Requirement signature: <Self where Self : P7, Self.[P6]Y == C>
protocol P8a : P7 where Y == C {}
// CHECK-LABEL: concrete_nesting_elimination_order.(file).P8b@
// CHECK-NEXT: Requirement signature: <Self where Self : P7, Self.[P6]Y == C>
protocol P8b : P7 where Y == C {}
// Make sure we pick 'Y == C' and not 'Y == G<C>' here.
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