| /* |
| * 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 It is a compile-time error if the arity of the user-declared |
| * operator - is not 0 or 1. |
| * The - operator is unique in that two overloaded versions are permitted. |
| * If the operator has no arguments, it denotes unary minus. |
| * If it as an argument, it denotes binary subtraction. |
| * @description Checks that operator - can be defined both with 0 and 1 arguments. |
| * @author kaigorodov |
| * @reviewer rodionov |
| */ |
| import "../../../Utils/expect.dart"; |
| |
| class C { |
| bool v; |
| C(this.v); |
| operator -() { return !v; } |
| operator -(C v2) { return v||!v2.v; } |
| } |
| |
| main() { |
| Expect.isTrue(-new C(false)); |
| Expect.isTrue(new C(true) - new C(false)); |
| Expect.isFalse(new C(false) - new C(true)); |
| } |
