| // 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. |
| // @dart = 2.19 |
| |
| // Make sure errors are emitted when trying to use interface classes without |
| // the `class-modifiers` experiment enabled. |
| |
| interface class InterfaceClass {} |
| // [error column 1, length 9] |
| // [analyzer] SYNTACTIC_ERROR.EXPERIMENT_NOT_ENABLED |
| // [cfe] The 'class-modifiers' language feature is disabled for this library. |
| |
| mixin M {} |
| interface class InterfaceClassTypeAlias = Object with M; |
| // [error column 1, length 9] |
| // [analyzer] SYNTACTIC_ERROR.EXPERIMENT_NOT_ENABLED |
| // [cfe] The 'class-modifiers' language feature is disabled for this library. |
