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de66b0c25c
Introduce a warning about redeclaring the associated types from an inherited protocol in the protocol being checked: * If the new declaration is an associated type, note that the declaration could be replaced by requirements in the protocol's where clause. * If the new declaration is a typealias, note that it could be replaced by a same-type constraint in the protocol's where clause.
74 lines
2.9 KiB
Swift
74 lines
2.9 KiB
Swift
// RUN: %target-typecheck-verify-swift -typecheck %s -verify
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// RUN: %target-typecheck-verify-swift -typecheck -debug-generic-signatures %s > %t.dump 2>&1
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// RUN: %FileCheck %s < %t.dump
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// CHECK-LABEL: .P1@
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// CHECK-NEXT: Requirement signature: <Self>
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// CHECK-NEXT: Canonical requirement signature: <τ_0_0>
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protocol P1 {}
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// CHECK-LABEL: .P2@
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// CHECK-NEXT: Requirement signature: <Self>
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// CHECK-NEXT: Canonical requirement signature: <τ_0_0>
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protocol P2 {}
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// CHECK-LABEL: .P3@
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// CHECK-NEXT: Requirement signature: <Self>
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// CHECK-NEXT: Canonical requirement signature: <τ_0_0>
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protocol P3 {}
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// basic protocol
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// CHECK-LABEL: .Q1@
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// CHECK-NEXT: Requirement signature: <Self where Self.X : P1>
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// CHECK-NEXT: Canonical requirement signature: <τ_0_0 where τ_0_0.X : P1>
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protocol Q1 {
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associatedtype X: P1 // expected-note 2{{declared here}}
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}
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// inheritance
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// CHECK-LABEL: .Q2@
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// CHECK-NEXT: Requirement signature: <Self where Self : Q1>
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// CHECK-NEXT: Canonical requirement signature: <τ_0_0 where τ_0_0 : Q1>
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protocol Q2: Q1 {}
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// inheritance without any new requirements
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// CHECK-LABEL: .Q3@
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// CHECK-NEXT: Requirement signature: <Self where Self : Q1>
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// CHECK-NEXT: Canonical requirement signature: <τ_0_0 where τ_0_0 : Q1>
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protocol Q3: Q1 {
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associatedtype X // expected-warning{{redeclaration of associated type 'X'}}
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}
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// inheritance adding a new conformance
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// CHECK-LABEL: .Q4@
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// CHECK-NEXT: Requirement signature: <Self where Self : Q1, Self.X : P2>
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// CHECK-NEXT: Canonical requirement signature: <τ_0_0 where τ_0_0 : Q1, τ_0_0.X : P2>
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protocol Q4: Q1 {
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associatedtype X: P2 // expected-warning{{redeclaration of associated type 'X'}}
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// expected-note@-1 2{{'X' declared here}}
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}
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// multiple inheritance
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// CHECK-LABEL: .Q5@
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// CHECK-NEXT: Requirement signature: <Self where Self : Q2, Self : Q3, Self : Q4>
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// CHECK-NEXT: Canonical requirement signature: <τ_0_0 where τ_0_0 : Q2, τ_0_0 : Q3, τ_0_0 : Q4>
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protocol Q5: Q2, Q3, Q4 {}
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// multiple inheritance without any new requirements
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// CHECK-LABEL: .Q6@
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// CHECK-NEXT: Requirement signature: <Self where Self : Q2, Self : Q3, Self : Q4>
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// CHECK-NEXT: Canonical requirement signature: <τ_0_0 where τ_0_0 : Q2, τ_0_0 : Q3, τ_0_0 : Q4>
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protocol Q6: Q2, // expected-note{{conformance constraint 'Self.X': 'P1' implied here}}
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Q3, Q4 {
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associatedtype X: P1 // expected-warning{{redundant conformance constraint 'Self.X': 'P1'}}
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// expected-warning@-1{{redeclaration of associated type 'X' from protocol 'Q4' is}}
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}
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// multiple inheritance with a new conformance
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// CHECK-LABEL: .Q7@
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// CHECK-NEXT: Requirement signature: <Self where Self : Q2, Self : Q3, Self : Q4, Self.X : P3>
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// CHECK-NEXT: Canonical requirement signature: <τ_0_0 where τ_0_0 : Q2, τ_0_0 : Q3, τ_0_0 : Q4, τ_0_0.X : P3>
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protocol Q7: Q2, Q3, Q4 {
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associatedtype X: P3 // expected-warning{{redeclaration of associated type 'X'}}
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}
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