| /* |
| * 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 composite member invocation on a target expression X is an |
| * expression of one of the forms: |
| * Composite member invocation on target X Corresponding member base name |
| * X.id++, X.id--, ++X.id, --X.id id |
| * @description Check explicit extension member invocation in form of --X.id |
| * @author sgrekhov@unipro.ru |
| */ |
| // SharedOptions=--enable-experiment=extension-methods |
| import "../../Utils/expect.dart"; |
| |
| class C { |
| int value; |
| C() : value = 0 {} |
| init() { |
| value = 0; |
| } |
| int get id => value; |
| void set id(int v) { |
| this.value = v; |
| } |
| } |
| |
| extension Extension1 on C { |
| int get id => this.value + 1; |
| void set id(int v) { |
| this.value = v + 1; |
| } |
| } |
| |
| extension Extension2 on C { |
| int get id => this.value + 2; |
| void set id(int v) { |
| this.value = v + 2; |
| } |
| } |
| |
| main() { |
| C c = C(); |
| --Extension1(c).id; |
| Expect.equals(1, c.value); |
| c.init(); |
| --Extension2(c).id; |
| Expect.equals(3, c.value); |
| c.init(); |
| --c.id; |
| Expect.equals(-1, c.value); |
| } |