| // Copyright (c) 2011, 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 postfix expression of the form e1 [e2 ]--, is equivalent to |
| /// (a, i){var r = a[i]; a[i] = r - 1; return r}(e1 , e2 ). |
| /// @description Checks that a postfix expression of the form e1 [e2 ]--, is |
| /// equivalent to (a, i){var r = a[i]; a[i] = r - 1; return r}(e1, e2) in |
| /// implementation (basically, that postfix -- works via operator- in the |
| /// described manner). |
| /// @author rodionov |
| |
| import '../../../Utils/expect.dart'; |
| |
| bool opInvoked = false; |
| |
| class A { |
| final String value; |
| |
| A(this.value); |
| |
| operator -(var other) { |
| opInvoked = true; |
| return new A("${value}-${other}"); |
| } |
| } |
| |
| main() { |
| List e1 = [new A("foo")]; |
| Expect.isFalse(opInvoked); |
| |
| Expect.equals("foo", (e1[0]--).value); |
| Expect.isTrue(opInvoked); |
| Expect.equals("foo-1", e1[0].value); |
| } |