| // 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 function type |
| /// @author sgrekhov@unipro.ru |
| /// @issue 39598 |
| |
| |
| void foo() {} |
| typedef void Foo(); |
| |
| main() { |
| Function f1 = foo; |
| f1!; |
| //^ |
| // [cfe] Operand of null-aware operation '!' has type 'Function' which excludes null. |
| // ^ |
| // [analyzer] STATIC_WARNING.UNNECESSARY_NON_NULL_ASSERTION |
| |
| Foo f2 = foo; |
| f2!; |
| //^ |
| // [cfe] Operand of null-aware operation '!' has type 'void Function()' which excludes null. |
| // ^ |
| // [analyzer] STATIC_WARNING.UNNECESSARY_NON_NULL_ASSERTION |
| } |
