| // 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 v--, where v is an identifier, |
| /// is equivalent to (){var r = v; v = r - 1; return r}(). |
| /// @description Checks that evaluation of an expression of the form v-- |
| /// is equivalent to (){var r = v; v = r - 1; return r;}() 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() { |
| var foo = new A("foo"); |
| Expect.isFalse(opInvoked); |
| |
| Expect.equals("foo", (foo--).value); |
| Expect.isTrue(opInvoked); |
| Expect.equals("foo-1", foo.value); |
| } |