@swift-main
@propertyWrapper struct Wrapper<T> { init(wrappedValue: T) { self.wrappedValue = wrappedValue } init(projectedValue: Self) { self.wrappedValue = projectedValue.wrappedValue } var wrappedValue: T var projectedValue: Self { return self } } let useWrapper: (Wrapper<Int>) -> Void = { $$0 in print($$0) print(_$0) }