| // 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 not thrown if the first |
| /// operand of [??] operator is not [null] regardless of the actual type of the |
| /// second operand. |
| /// @author iarkh@unipro.ru |
| |
| |
| const int? i = 1; |
| const dynamic d1 = 11; |
| const String? d2 = "check me here"; |
| |
| main() { |
| const String s1 = "" ?? (124 as String); |
| // ^^^^^^^^^^^^^^^ |
| // [analyzer] STATIC_WARNING.DEAD_NULL_AWARE_EXPRESSION |
| // ^ |
| // [cfe] Operand of null-aware operation '??' has type 'String' which excludes null. |
| const int i1 = i ?? ("" as int); |
| const String s2 = d2 ?? d1; |
| const int i2 = d1 ?? d2; |
| } |
