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a964b6ad78
This is a generic signature that stores exactly the requirements that a
protocol decl introduces, not letting them be implied by the Self :
Protocol requirement, nor storing any requirements introduced by the
protocols requirements.
Specifically, suppose we have
protocol Foo {}
protocol Bar {}
protocol Baz {
associatedtype X : Foo
}
protocol Qux: Baz {
associatedtype X : Bar
}
The normal generic signature and (canonical) protocol requirement
signature of `Baz` will be, respectively
<Self where Self : Baz>
<Self where Self : Baz, Self.X : Foo>
And for `Qux`, they will be:
<Self where Self : Qux>
<Self where Self : Qux, Self : Baz, Self.X : Bar>
Note that the `Self.X : Foo` requirement is not listed.
For the moment, this is unused except for `-debug-generic-signatures`.
71 lines
2.4 KiB
Swift
71 lines
2.4 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
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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
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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
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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, Q3, Q4 {
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associatedtype X: P1
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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
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}
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