mirror of
https://github.com/apple/swift.git
synced 2025-12-21 12:14:44 +01:00
39 lines
1.6 KiB
Swift
39 lines
1.6 KiB
Swift
// 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
|
|
// RUN: %target-swift-frontend -typecheck %s -debug-generic-signatures -disable-requirement-machine-concrete-contraction -dump-requirement-machine 2>&1 | %FileCheck %s --check-prefix=RULE
|
|
|
|
protocol P {}
|
|
|
|
class Base : P {}
|
|
|
|
class Derived : Base {}
|
|
|
|
struct G<X> {}
|
|
|
|
// CHECK-LABEL: ExtensionDecl line={{.*}} base=G
|
|
// CHECK-NEXT: Generic signature: <X where X == Derived>
|
|
extension G where X : Base, X : P, X == Derived {}
|
|
|
|
// RULE: + superclass: τ_0_0 Base
|
|
// RULE: + conforms_to: τ_0_0 P
|
|
// RULE: + same_type: τ_0_0 Derived
|
|
|
|
// RULE: Rewrite system: {
|
|
// RULE-NEXT: - [P].[P] => [P] [permanent]
|
|
// RULE-NEXT: - τ_0_0.[superclass: Base] => τ_0_0 [explicit]
|
|
// RULE-NEXT: - τ_0_0.[P] => τ_0_0 [explicit]
|
|
// RULE-NEXT: - τ_0_0.[concrete: Derived] => τ_0_0 [explicit]
|
|
// RULE-NEXT: - τ_0_0.[layout: _NativeClass] => τ_0_0
|
|
// RULE-NEXT: - τ_0_0.[superclass: Derived] => τ_0_0
|
|
// RULE-NEXT: - τ_0_0.[concrete: Derived : P] => τ_0_0
|
|
// RULE-NEXT: - τ_0_0.[concrete: Base : P] => τ_0_0
|
|
// RULE-NEXT: }
|
|
|
|
// Notes:
|
|
//
|
|
// - concrete contraction kills the 'X : P' requirement before building the
|
|
// rewrite system so this test passes trivially.
|
|
//
|
|
// - without concrete contraction, we used to hit a problem where the sort
|
|
// in the minimal conformances algorithm would hit the unordered concrete
|
|
// conformances [concrete: Derived : P] vs [concrete: Base : P]. |