| /* |
| * 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 simple member invocation on a target expression X is an |
| * expression of one of the forms: |
| * Member invocation on target X Corresponding member name |
| * X[expr2] [] |
| * @description Check explicit extension member invocation in form of X[expr2] |
| * @author sgrekhov@unipro.ru |
| */ |
| // SharedOptions=--enable-experiment=extension-methods |
| import "../../Utils/expect.dart"; |
| |
| class C { |
| String operator [](int index) => "Lily was here:$index"; |
| } |
| |
| extension Extension1 on C { |
| String operator [](int index) => "Show must go on:$index"; |
| } |
| |
| extension Extension2 on C { |
| String operator [](int index) => "Let it be:$index"; |
| } |
| |
| main() { |
| C c = new C(); |
| Expect.equals("Show must go on:42", Extension1(c)[42]); |
| Expect.equals("Let it be:13", Extension2(c)[13]); |
| Expect.equals("Lily was here:451", c[451]); |
| } |