| // Copyright (c) 2023, 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 compile-time error if the type in the extends clause of a |
| /// class C is a type variable, a type alias that does not denote a class, an |
| /// enumerated type, a deferred type, type dynamic, or type FutureOr<T> for any |
| /// T. |
| /// |
| /// @description Checks that it is a compile-time error if `FutureOr<T>` is used |
| /// as a superclass |
| /// @author sgrekhov22@gmail.com |
| |
| class A {} |
| |
| class C1<T> extends FutureOr<T> {} |
| // ^^^^^^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| |
| class C2 extends FutureOr<A> {} |
| // ^^^^^^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| |
| main() { |
| C1(); |
| C2(); |
| } |
