| /* |
| * Copyright (c) 2019, 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 [??] operator only evaluates its second operand if the first |
| * evaluates to [null], and the second operand must be a potentially constant |
| * expression. |
| * @description Checks that operator [??] throws a error if the first operand is |
| * not [null] and the second one is not a potentially constant. |
| * @author iarkh@unipro.ru |
| */ |
| // SharedOptions=--enable-experiment=constant-update-2018 |
| |
| dynamic d1 = "12345"; |
| dynamic d2 = 11; |
| int i = 14; |
| dynamic d; |
| |
| const const1 = 0; |
| const const2 = "testme"; |
| |
| main() { |
| const a1 = const1 ?? d1; |
| // ^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| |
| const a2 = const2 ?? d2; |
| // ^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| |
| const a3 = 14 ?? i; |
| // ^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| |
| const a4 = "12345" ?? d; |
| // ^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| } |
