| // 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 grammar of selectors is extended to allow null-aware |
| * subscripting using the syntax e1?[e2] which evaluates to null if e1 |
| * evaluates to null and otherwise evaluates as e1[e2]. |
| * |
| * @description Check that the grammar of selectors is extended to allow |
| * null-aware subscripting using the syntax e1?[e2] which evaluates to null if |
| * e1 evaluates to null and otherwise evaluates as e1[e2]. Test legacy pre-NNBD |
| * types |
| * @static-warning |
| * @author sgrekhov@unipro.ru |
| * @issue 39865 |
| */ |
| // Requirements=nnbd-weak |
| import "../../../Utils/expect.dart"; |
| import "legacy_lib.dart"; |
| |
| main() { |
| A? a = null; |
| Expect.isNull(a?[42]); |
| a = new A(); |
| Expect.equals(42, a?[42]); /// static type warning |
| } |
