| /* |
| * 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 It is a warning to use the null check operator (!) on a |
| * non-nullable expression. |
| * |
| * @description Check that it is a warning to use the null check operator (!) on |
| * a non-nullable expression. Test if (t is Object) {…} |
| * @author sgrekhov@unipro.ru |
| * @issue 39598 |
| * @issue 39867 |
| */ |
| // SharedOptions=--enable-experiment=non-nullable |
| // Requirements=nnbd-strong |
| class A {} |
| |
| main() { |
| A? a = new A(); |
| if (a is Object) { |
| a!; //# 01: static type warning |
| } |
| } |
