| /* |
| * Copyright (c) 2016, 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 |
| * Description Operator Associativity Precedence |
| * Unary postfix ., ?., e++, e–-, e1[e2], e1(), () None 16 |
| * @description Test that '?.' unary postfix operator has highest |
| * precedence (16). Compare with Unary prefix (precedence 15). Test that |
| * '?.' has priority higher than ~ |
| * @author sgrekhov@unipro.ru |
| */ |
| import "../../../Utils/expect.dart"; |
| |
| class C { |
| String log = ""; |
| |
| C operator ~() { |
| log += "~"; |
| return this; |
| } |
| |
| C e() { |
| log += "m"; |
| return this; |
| } |
| } |
| |
| main() { |
| C c = new C(); |
| ~c?.e(); |
| Expect.equals( "m~", c.log); |
| |
| C c2 = null; |
| Expect.throws(() {~c2?.e();}, (e) => e is NoSuchMethodError); |
| } |