| // 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 an |
| * expression of type T if T is strictly non-nullable |
| * |
| * @description It is a warning to use the null check operator (!) on an |
| * expression of type T if T is strictly non-nullable. Test if (t is Object) {…} |
| * @author sgrekhov@unipro.ru |
| * @issue 39598 |
| * @issue 39867 |
| */ |
| |
| class A {} |
| |
| test(var a) { |
| if (a is Object) { |
| a!; |
| // ^ |
| // [cfe] Operand of null-aware operation '!' has type 'Object' which excludes null. |
| // ^ |
| // [analyzer] STATIC_WARNING.UNNECESSARY_NON_NULL_ASSERTION |
| } |
| } |
| |
| main() { |
| A? a = new A(); |
| test(a); |
| } |
