| // 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 |
| /// Logical OR || Left 5 |
| /// @description Test that '||' logical OR operator has precedence (5). |
| /// Compare with if-null '??' operator (precedence 4). Test that '||' has |
| /// priority higher than '??' |
| /// @author sgrekhov@unipro.ru |
| |
| import "../../../Utils/expect.dart"; |
| |
| String log = ""; |
| |
| class C { |
| bool m(String val) { |
| log += val; |
| return false; |
| } |
| } |
| |
| main() { |
| dynamic c = new C(); |
| c.m("c1") || c.m("c2") ?? c.m("c3") || c.m("c4"); |
| // ^^^^^^^^^^^^^^^^^^^^^^ |
| // [analyzer] STATIC_WARNING.DEAD_NULL_AWARE_EXPRESSION |
| // ^ |
| // [cfe] Operand of null-aware operation '??' has type 'bool' which excludes null. |
| Expect.equals("c1c2", log); |
| |
| log = ""; |
| |
| null ?? c.m("c3") || c.m("c4"); |
| Expect.equals("c3c4", log); |
| } |
| |