| // 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 Test equality of function and methods tearoffs. |
| /// https://github.com/dart-lang/language/issues/1712 |
| /// |
| /// @description Checks equality of generic mixin methods tearoffs |
| /// @author sgrekhov@unipro.ru |
| |
| // SharedOptions=--enable-experiment=constructor-tearoffs |
| |
| import "../../Utils/expect.dart"; |
| |
| class A { |
| T mixedInSuperMethod<T extends num>(T t) => t; |
| } |
| |
| mixin M on A { |
| void mixedInMethod<T>() {} |
| T mixedInSuperMethod<T extends num>(T t) => super.mixedInSuperMethod<T>(t) + 1 as T; |
| } |
| |
| class AM<T extends num> extends A with M { |
| T Function(T t) get tearoffSuperMethod => super.mixedInSuperMethod<T>; |
| } |
| |
| main() { |
| <X extends num>(X x) { |
| A a = new A(); |
| AM<X> am = new AM<X>(); |
| |
| var s1 = a.mixedInSuperMethod<X>; |
| var s2 = a.mixedInSuperMethod<X>; |
| var s3 = am.tearoffSuperMethod; |
| var s4 = am.tearoffSuperMethod; |
| |
| Expect.equals(s1, s2); |
| Expect.notEquals(s1, s3); |
| Expect.notEquals(s2, s3); |
| Expect.equals(s3, s4); |
| Expect.equals(0, s1(x)); |
| Expect.equals(1, s3(x)); |
| |
| A a1 = new AM<X>(); |
| var s5 = a1.mixedInSuperMethod<X>; |
| Expect.equals(s5, a1.mixedInSuperMethod<X>); |
| Expect.approxEquals(1, s5(x)); |
| }<int>(0); |
| } |