| // Copyright (c) 2015, 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 | |
| * ifNullExpression: | |
| * logicalOrExpression (‘??’ logicalOrExpression)* | |
| * | |
| * @description Check that it is a compile time error, if '??' is used twice | |
| * | |
| * @compile-error | |
| * @author sgrekhov@unipro.ru | |
| */ | |
| main() { | |
| var x = 10 ?? ?? 20; | |
| } |