| /* | |
| * 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 The following names are allowed for user-defined operators: | |
| * <, >, <=, >=, ==, -, +, /, ˜/, *, %, |, ˆ, &, <<, >>, []=, [], ˜. | |
| * @description Checks that operator += cannot be defined in a user class. | |
| * @compile-error | |
| * @author iefremov | |
| * @reviewer kaigorodov | |
| */ | |
| class C { | |
| operator +=(x) {} | |
| } | |
| main() { | |
| try { | |
| var b = (new C()); | |
| b += null; | |
| } catch (x) {} | |
| } |