| /* |
| * Copyright (c) 2019, 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 If both the extension and the method is generic, then inference |
| * must infer the extension type parameters first, to figure out whether the |
| * extension applies, and only then start inferring method type parameters. As |
| * mentioned above, the inference is similar to other cases of chained inference. |
| * @description Check inference infers the extension type first and then infers |
| * method type parameter. |
| * @author iarkh@unipro.ru |
| */ |
| // SharedOptions=--enable-experiment=extension-methods |
| |
| import "../../Utils/expect.dart"; |
| |
| class A {} |
| class B extends A {} |
| class C extends B {} |
| |
| extension SuperList<T> on List<T> { |
| |
| void checkme<R extends T>(expected1, expected2) { |
| Expect.equals(expected1, T); |
| Expect.equals(expected2, R); |
| } |
| |
| } |
| |
| main() { |
| List<String> list1 = []; |
| List<A> list2 = [A()]; |
| |
| list1.checkme(String, String); |
| |
| list2.checkme(A, A); |
| list2.checkme<A>(A, A); |
| list2.checkme<B>(A, B); |
| list2.checkme<C>(A, C); |
| } |
| |