| // 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 [??] in constant expression throws a |
| /// compile error if the first operand is not constant. |
| /// @author iarkh@unipro.ru |
| |
| |
| int? nonConst_i = 1; |
| Null nonConst_null = null; |
| dynamic nonConst_null_1 = null; |
| dynamic nonConst; |
| String? nonConst_str = ""; |
| |
| main() { |
| const int a1 = nonConst_i ?? 1; |
| // ^^^^^^^^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| |
| const a2 = nonConst_null ?? "incorrect"; |
| // ^^^^^^^^^^^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| |
| const a3 = nonConst_null_1 ?? "incorrect"; |
| // ^^^^^^^^^^^^^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| |
| const a4 = nonConst ?? 9; |
| // ^^^^^^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| |
| const a5 = nonConst_str ?? "145"; |
| // ^^^^^^^^^^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| |
| } |
