| /* |
| * 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 compile-time exception is thrown if the first |
| * operand of [??] operator is [null] and the second one is incorrect in the |
| * constant expression. |
| * @compile-error |
| * @author iarkh@unipro.ru |
| */ |
| // SharedOptions=--enable-experiment=constant-update-2018 |
| |
| main() { |
| const String s1 = null ?? (null as String).length; |
| } |
