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// RUN: %target-typecheck-verify-swift
// RUN: %target-swift-frontend -typecheck -debug-generic-signatures %s 2>&1 | %FileCheck %s
// CHECK-LABEL: redundant_protocol_refinement.(file).Base@
// CHECK-LABEL: Requirement signature: <Self>
protocol Base {}
// CHECK-LABEL: redundant_protocol_refinement.(file).Middle@
// CHECK-LABEL: Requirement signature: <Self where Self : Base>
protocol Middle : Base {}
// CHECK-LABEL: redundant_protocol_refinement.(file).Derived@
// CHECK-LABEL: Requirement signature: <Self where Self : Middle>
protocol Derived : Middle, Base {}
// CHECK-LABEL: redundant_protocol_refinement.(file).Derived2@
// CHECK-LABEL: Requirement signature: <Self where Self : Middle>
protocol Derived2 : Middle {}
// CHECK-LABEL: redundant_protocol_refinement.(file).MoreDerived@
// CHECK-LABEL: Requirement signature: <Self where Self : Derived2>
protocol MoreDerived : Derived2, Base {}
protocol P1 {}
protocol P2 {
associatedtype Assoc: P1
}
// no warning here
protocol Good: P2, P1 where Assoc == Self {}
// CHECK-LABEL: redundant_protocol_refinement.(file).Good@
// CHECK-LABEL: Requirement signature: <Self where Self : P1, Self : P2, Self == Self.[P2]Assoc>
// missing refinement of 'P1'
protocol Bad: P2 where Assoc == Self {}
// expected-warning@-1 {{protocol 'Bad' should be declared to refine 'P1' due to a same-type constraint on 'Self'}}
// CHECK-LABEL: redundant_protocol_refinement.(file).Bad@
// CHECK-LABEL: Requirement signature: <Self where Self : P2, Self == Self.[P2]Assoc>
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