| /* |
| * 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 Verify several kinds of if-null expressions, logicalOrExpression |
| * is a variable. |
| * @static-warning |
| * @author a.semenov@unipro.ru |
| */ |
| import '../../../Utils/expect.dart'; |
| |
| main() { |
| int? x = 1; |
| var n = null; |
| |
| Expect.equals(1, x ?? 10); |
| Expect.equals(1, x ?? 10 ?? 20); /// static type warning |
| Expect.equals(1, x ?? 10 ?? 20 ?? 30); /// static type warning |
| Expect.equals(10, n ?? 10); |
| Expect.equals(10, n ?? 10 ?? 20); |
| Expect.equals(10, n ?? 10 ?? 20 ?? 40); |
| Expect.equals(x, x ?? n); |
| Expect.equals(x, n ?? x); |
| Expect.equals(x, n ?? n ?? x); |
| Expect.equals(x, x ?? n ?? 5); |
| Expect.equals(x, n ?? x ?? 5); |
| } |