| /* |
| * 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 FutureOr<FutureOr<A>> |
| * @author sgrekhov@unipro.ru |
| * @issue 39598 |
| */ |
| |
| import "dart:async"; |
| |
| class A {} |
| |
| main() { |
| FutureOr<FutureOr<A>> a = new A(); |
| a!; |
| //^ |
| // [cfe] Operand of null-aware operation '!' has type 'FutureOr<FutureOr<A>>' which excludes null. |
| // ^ |
| // [analyzer] STATIC_WARNING.UNNECESSARY_NON_NULL_ASSERTION |
| } |
