| // RUN: %target-typecheck-verify-swift -swift-version 4 |
| |
| // rdar://problem/31969605 |
| |
| class Base {} |
| class Derived : Base {} |
| |
| protocol Refined {} |
| protocol Proto : Refined {} |
| extension Base : Refined {} |
| |
| func baseFn(_: Base) {} |
| |
| func superclassConversion(fn: @escaping (Base) -> ()) { |
| let _: (Derived) -> () = fn |
| } |
| |
| func existentialConversion(fn: @escaping (Refined) -> ()) { |
| let _: (Proto) -> () = fn |
| let _: (Base) -> () = fn |
| let _: (Derived) -> () = fn |
| } |
| |
| // rdar://problem/31725325 |
| |
| func a<b>(_: [(String, (b) -> () -> Void)]) {} |
| func a<b>(_: [(String, (b) -> () throws -> Void)]) {} |
| |
| class c { |
| func e() {} |
| static var d = [("", e)] |
| } |
| a(c.d) |
| |
| func b<T>(_: (T) -> () -> ()) {} |
| |
| b(c.e) |
| |
| func bar(_: () -> ()) {} |
| func bar(_: () throws -> ()) {} |
| func bar_empty() {} |
| |
| bar(bar_empty) |
| |
| func consumeNoEscape(_ f: (Int) -> Int) {} |
| func consumeEscaping(_ f: @escaping (Int) -> Int) {} |
| func takesAny(_ f: Any) {} |
| |
| func twoFns(_ f: (Int) -> Int, _ g: @escaping (Int) -> Int) { |
| // expected-note@-1 {{parameter 'f' is implicitly non-escaping}} |
| takesAny(f) // expected-error {{converting non-escaping value to 'Any' may allow it to escape}} |
| takesAny(g) |
| var h = g |
| h = f // expected-error {{assigning non-escaping parameter 'f' to an @escaping closure}} |
| } |
| |
| takesAny(consumeNoEscape) |
| takesAny(consumeEscaping) |
| |
| var noEscapeParam: ((Int) -> Int) -> () = consumeNoEscape |
| var escapingParam: (@escaping (Int) -> Int) -> () = consumeEscaping |
| noEscapeParam = escapingParam // expected-error {{cannot assign value of type '(@escaping (Int) -> Int) -> ()' to type '((Int) -> Int) -> ()}} |
| |
| escapingParam = takesAny |
| noEscapeParam = takesAny // expected-error {{converting non-escaping value to 'Any' may allow it to escape}} |
