blob: 0626ea12a350282bde3c2b3e0c5f46aa8f7c0f94 [file] [log] [blame]
// Copyright (c) 2021, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
/// @assertion Currently you can do instantiated tear-offs of instance methods.
/// We restrict that to interface methods, which precisely excludes the call
/// methods of function types. We do not allow instantiating function values,
/// and therefore also cannot allow side-stepping that restriction by
/// instantiation the .call "instance" method of such a value.
/// That makes it a compile-time error to explicitly instantiate the call method
/// of an expression with a function type or of type Function, and the tear-off
/// of a call method of a function type is not subject to implicit instantiation
/// (so the tear-off is always generic, even if the context type requires it not
/// to be, which is then guaranteed to introduce a type error).
/// @description Checks that it is allowed to tear-off a 'call' method of a
/// user defined classes
/// @author
// SharedOptions=--enable-experiment=constructor-tearoffs
import "../../Utils/expect.dart";
class C {
T call<T>(T t) => t;
main() {
C c = new C();
int Function(int) f =;
Expect.equals(42, f(42));