| /* |
| * 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 A static extension method can be torn off like an instance method. |
| * |
| * @description Check that a static extension method can be torn off like an |
| * instance method. |
| * @author sgrekhov@unipro.ru |
| */ |
| // SharedOptions=--enable-experiment=extension-methods |
| import "../../Utils/expect.dart"; |
| |
| class C { |
| Object val; |
| C(this.val); |
| |
| String toString() => val.toString(); |
| } |
| |
| extension ExtendedList on List { |
| int foo<T extends C>(T x) => x.toString().length; |
| } |
| |
| main() { |
| List list = [1, 2, 3]; |
| int Function(C) func = list.foo; |
| Expect.equals(3, func(C([1]))); |
| Expect.equals(3, func(C("[1]"))); |
| Expect.equals(13, func(C("Lily was here"))); |
| } |