mirror of
https://github.com/apple/swift.git
synced 2025-12-21 12:14:44 +01:00
b59c30c1af
Conditional conformances aren't quite ready yet for Swift 4.1, so introduce the flag `-enable-experimental-conditional-conformances` to enable conditional conformaces, and an error when one declares a conditional conformance without specifying the flag. Add this flag when building the standard library (which will vend conditional conformances) and to all of the tests that need it. Fixes rdar://problem/35728337.
89 lines
1.6 KiB
Swift
89 lines
1.6 KiB
Swift
// RUN: %empty-directory(%t)
|
|
// RUN: %target-build-swift -enable-experimental-conditional-conformances %s -o %t/a.out
|
|
// RUN: %target-run %t/a.out | %FileCheck %s
|
|
|
|
// REQUIRES: executable_test
|
|
|
|
// Smoke test to see that various conditional conformances correctly execute
|
|
|
|
protocol P1 {
|
|
func method1()
|
|
}
|
|
var isp1_count = 0
|
|
struct IsP1: P1 {
|
|
var id: Int
|
|
init() {
|
|
id = isp1_count
|
|
isp1_count += 1
|
|
}
|
|
func method1() {
|
|
print("IsP1", id)
|
|
}
|
|
}
|
|
protocol P2 {
|
|
func method2()
|
|
}
|
|
protocol P3 {
|
|
func method3()
|
|
}
|
|
protocol P4: P1 {
|
|
func method4()
|
|
}
|
|
|
|
protocol Assoc { associatedtype AT }
|
|
|
|
func takes_P2<X: P2>(_ x: X) {
|
|
x.method2()
|
|
}
|
|
|
|
struct NoRecur<T> {
|
|
var x: T
|
|
}
|
|
extension NoRecur: P2 where T: P1 {
|
|
func method2() {
|
|
print("NoRecur")
|
|
x.method1()
|
|
}
|
|
}
|
|
|
|
var noRecur = NoRecur(x: IsP1())
|
|
print("noRecur.method2()")
|
|
noRecur.method2()
|
|
// CHECK-LABEL: noRecur.method2()
|
|
// CHECK-NEXT: NoRecur
|
|
// CHECK-NEXT: IsP1 0
|
|
|
|
print("takes_P2(NoRecur(...))")
|
|
takes_P2(NoRecur(x: IsP1()))
|
|
// CHECK-LABEL: takes_P2(NoRecur(...))
|
|
// CHECK-NEXT: NoRecur
|
|
// CHECK-NEXT: IsP1 1
|
|
|
|
struct Recur<T> {
|
|
var id: Int
|
|
var x: T
|
|
}
|
|
extension Recur: P2 where T: P2 {
|
|
func method2() {
|
|
print("Recur", id)
|
|
x.method2()
|
|
}
|
|
}
|
|
|
|
var recur = Recur(id: 0, x: Recur(id: 1, x: NoRecur(x: IsP1())))
|
|
print("recur.method2()")
|
|
recur.method2()
|
|
// CHECK-LABEL: recur.method2()
|
|
// CHECK-NEXT: Recur 0
|
|
// CHECK-NEXT: Recur 1
|
|
// CHECK-NEXT: NoRecur
|
|
// CHECK-NEXT: IsP1 2
|
|
|
|
print("takes_P2(Recur(...))")
|
|
takes_P2(Recur(id: 2, x: Recur(id: 3, x: NoRecur(x: IsP1()))))
|
|
// CHECK-LABEL: takes_P2(Recur(...))
|
|
// CHECK-NEXT: Recur 2
|
|
// CHECK-NEXT: Recur 3
|
|
// CHECK-NEXT: NoRecur
|
|
// CHECK-NEXT: IsP1 3
|