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// RUN: %empty-directory(%t)
// RUN: %target-build-swift %s -o %t/a.out
// RUN: %target-codesign %t/a.out
// RUN: %target-run %t/a.out
// REQUIRES: executable_test
protocol P {
func foo() -> Int
}
struct X : P {
func foo() -> Int { return 1 }
}
struct Y<T> {
var wrapped: T
}
extension Y: P where T: P {
func foo() -> Int { return wrapped.foo() + 10 }
}
func tryAsP(_ value: Any) -> Int {
if let p = value as? P {
return p.foo()
}
return 0
}
extension Dictionary: P where Value == (Key) -> Bool {
func foo() -> Int { return 2 }
}
let yx = Y(wrapped: X())
precondition(tryAsP(yx) == 11)
let dict: [Int : (Int) -> Bool] = [:]
precondition(tryAsP(dict) == 2)
let yDict = Y(wrapped: dict)
precondition(tryAsP(yDict) == 12)
// <rdar://128774651> Generic argument indexing runs off the end when a key
// argument comes after a non-key argument.
struct Outer<T> {}
extension Outer where T == Int {
struct Inner<U> {
// Add some stored properties that will have field offsets in the metadata.
// If we read past the end of the generic arguments, we'll find these and
// crash on something that's definitely not a valid pointer.
var a: T?
var b: T?
var c: T?
var d: T?
}
}
extension Outer.Inner: P where U == String {
func foo() -> Int { return 1 }
}
let conformingInner: Any = Outer.Inner<String>()
let nonconformingInner: Any = Outer.Inner<Int>()
precondition(conformingInner is P)
precondition(!(nonconformingInner is P))
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