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debug-generic-signatures.swift
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// RUN: %target-swift-frontend -typecheck -debug-generic-signatures %s 2>&1 | %FileCheck %s
// CHECK: Generic signature: <Self where Self : P1>
// CHECK-NEXT: Canonical generic signature: <τ_0_0 where τ_0_0 : P1>
// CHECK-LABEL: main.(file).P1@
// CHECK: Requirement signature: <Self>
// CHECK-NEXT: Canonical requirement signature: <τ_0_0>
protocol P1 {
associatedtype A
func f() -> A
}
// Recursion, and where clauses.
// CHECK: Generic signature: <Self where Self : P2>
// CHECK-NEXT: Canonical generic signature: <τ_0_0 where τ_0_0 : P2>
// CHECK-LABEL: main.(file).P2@
// CHECK: Requirement signature: <Self where Self.A : P2, Self.B : P2, Self.A.A == Self.B.A>
// CHECK-NEXT: Canonical requirement signature: <τ_0_0 where τ_0_0.A : P2, τ_0_0.B : P2, τ_0_0.A.A == τ_0_0.B.A>
protocol P2 {
associatedtype A: P2
associatedtype B: P2 where Self.A.A == Self.B.A
}
// Simpler recursion
// CHECK: Generic signature: <Self where Self : P3>
// CHECK-NEXT: Canonical generic signature: <τ_0_0 where τ_0_0 : P3>
// CHECK-LABEL: main.(file).P3@
// CHECK: Requirement signature: <Self where Self.A : P3>
// CHECK-NEXT: Canonical requirement signature: <τ_0_0 where τ_0_0.A : P3>
protocol P3 {
associatedtype A: P3
}
// CHECK-LABEL: StructDecl name=Basic
// CHECK: (normal_conformance type=Basic protocol=P1
// CHECK-NEXT: (assoc_type req=A type=Int)
// CHECK-NEXT: (value req=f() witness=main.(file).Basic.f()@{{.*}}))
struct Basic: P1 {
typealias A = Int
func f() -> Int { fatalError() }
}
// Recursive conformances should have finite output.
// CHECK-LABEL: StructDecl name=Recur
// CHECK-NEXT: (normal_conformance type=Recur protocol=P2
// CHECK-NEXT: (assoc_type req=A type=Recur)
// CHECK-NEXT: (assoc_type req=B type=Recur)
// CHECK-NEXT: (normal_conformance type=Recur protocol=P2 (details printed above))
// CHECK-NEXT: (normal_conformance type=Recur protocol=P2 (details printed above)))
struct Recur: P2 {
typealias A = Recur
typealias B = Recur
}
// The full information about a conformance doesn't need to be printed twice.
// CHECK-LABEL: StructDecl name=NonRecur
// CHECK-NEXT: (normal_conformance type=NonRecur protocol=P2
// CHECK-NEXT: (assoc_type req=A type=Recur)
// CHECK-NEXT: (assoc_type req=B type=Recur)
// CHECK-NEXT: (normal_conformance type=Recur protocol=P2
// CHECK-NEXT: (assoc_type req=A type=Recur)
// CHECK-NEXT: (assoc_type req=B type=Recur)
// CHECK-NEXT: (normal_conformance type=Recur protocol=P2 (details printed above))
// CHECK-NEXT: (normal_conformance type=Recur protocol=P2 (details printed above)))
// CHECK-NEXT: (normal_conformance type=Recur protocol=P2 (details printed above)))
struct NonRecur: P2 {
typealias A = Recur
typealias B = Recur
}
// Conditional conformance.
// CHECK: Generic signature: <T>
// CHECK-NEXT: Canonical generic signature: <τ_0_0>
// CHECK-LABEL: ExtensionDecl line={{.*}} base=Generic
struct Generic<T> {}
// CHECK-LABEL: ExtensionDecl line={{.*}} base=Generic
// CHECK-NEXT: (normal_conformance type=Generic<T> protocol=P1
// CHECK-NEXT: (assoc_type req=A type=T)
// CHECK-NEXT: (value req=f() witness=main.(file).Generic extension.f()@{{.*}})
// CHECK-NEXT: conforms_to: T P1)
extension Generic: P1 where T: P1 {
typealias A = T
func f() -> T { fatalError() }
}
// Satisfying associated types with requirements with generic params
// CHECK: Generic signature: <T, U>
// CHECK-NEXT: Canonical generic signature: <τ_0_0, τ_0_1>
// CHECK-LABEL: ExtensionDecl line={{.*}} base=Super
class Super<T, U> {}
// CHECK-LABEL: ExtensionDecl line={{.*}} base=Super
// CHECK-NEXT: (normal_conformance type=Super<T, U> protocol=P2
// CHECK-NEXT: (assoc_type req=A type=T)
// CHECK-NEXT: (assoc_type req=B type=T)
// CHECK-NEXT: (abstract_conformance protocol=P2)
// CHECK-NEXT: (abstract_conformance protocol=P2)
// CHECK-NEXT: conforms_to: T P2
// CHECK-NEXT: conforms_to: U P2)
extension Super: P2 where T: P2, U: P2 {
typealias A = T
typealias B = T
}
// Inherited/specialized conformances.
// CHECK-LABEL: ClassDecl name=Sub
// CHECK-NEXT: (inherited_conformance type=Sub protocol=P2
// CHECK-NEXT: (specialized_conformance type=Super<NonRecur, Recur> protocol=P2
// CHECK-NEXT: (substitution_map generic_signature=<T, U where T : P2, U : P2>
// CHECK-NEXT: (substitution T -> NonRecur)
// CHECK-NEXT: (substitution U -> Recur)
// CHECK-NEXT: (conformance type=T
// CHECK-NEXT: (normal_conformance type=NonRecur protocol=P2
// CHECK-NEXT: (assoc_type req=A type=Recur)
// CHECK-NEXT: (assoc_type req=B type=Recur)
// CHECK-NEXT: (normal_conformance type=Recur protocol=P2
// CHECK-NEXT: (assoc_type req=A type=Recur)
// CHECK-NEXT: (assoc_type req=B type=Recur)
// CHECK-NEXT: (normal_conformance type=Recur protocol=P2 (details printed above))
// CHECK-NEXT: (normal_conformance type=Recur protocol=P2 (details printed above)))
// CHECK-NEXT: (normal_conformance type=Recur protocol=P2 (details printed above))))
// CHECK-NEXT: (conformance type=U
// CHECK-NEXT: (normal_conformance type=Recur protocol=P2 (details printed above))))
// CHECK-NEXT: (conditional requirements unable to be computed)
// CHECK-NEXT: (normal_conformance type=Super<T, U> protocol=P2
// CHECK-NEXT: (assoc_type req=A type=T)
// CHECK-NEXT: (assoc_type req=B type=T)
// CHECK-NEXT: (abstract_conformance protocol=P2)
// CHECK-NEXT: (abstract_conformance protocol=P2)
// CHECK-NEXT: conforms_to: T P2
// CHECK-NEXT: conforms_to: U P2)))
class Sub: Super<NonRecur, Recur> {}
// Specialization of a recursive conformance should be okay: recursion detection
// should work through SubstitutionMaps.
// CHECK-LABEL: StructDecl name=RecurGeneric
// CHECK-NEXT: (normal_conformance type=RecurGeneric<T> protocol=P3
// CHECK-NEXT: (assoc_type req=A type=RecurGeneric<T>)
// CHECK-NEXT: (normal_conformance type=RecurGeneric<T> protocol=P3 (details printed above)))
struct RecurGeneric<T: P3>: P3 {
typealias A = RecurGeneric<T>
}
// CHECK-LABEL: StructDecl name=Specialize
// CHECK-NEXT: (normal_conformance type=Specialize protocol=P3
// CHECK-NEXT: (assoc_type req=A type=RecurGeneric<Specialize>)
// CHECK-NEXT: (specialized_conformance type=Specialize.A protocol=P3
// CHECK-NEXT: (substitution_map generic_signature=<T where T : P3>
// CHECK-NEXT: (substitution T -> Specialize)
// CHECK-NEXT: (conformance type=T
// CHECK-NEXT: (normal_conformance type=Specialize protocol=P3 (details printed above))))
// CHECK-NEXT: (normal_conformance type=RecurGeneric<T> protocol=P3
// CHECK-NEXT: (assoc_type req=A type=RecurGeneric<T>)
// CHECK-NEXT: (normal_conformance type=RecurGeneric<T> protocol=P3 (details printed above)))))
struct Specialize: P3 {
typealias A = RecurGeneric<Specialize>
}