| // 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 The grammar is: |
| /// |
| /// classDeclaration ::= (classModifiers | mixinClassModifiers) 'class' typeIdentifier |
| /// typeParameters? superclass? interfaces? |
| /// '{' (metadata classMemberDeclaration)* '}' |
| /// | classModifiers 'class' mixinApplicationClass |
| /// |
| /// classModifiers ::= 'sealed' |
| /// | 'abstract'? ('base' | 'interface' | 'final')? |
| /// |
| /// mixinClassModifiers ::= 'abstract'? 'base'? 'mixin' |
| /// |
| /// mixinDeclaration ::= 'base'? 'mixin' typeIdentifier typeParameters? |
| /// ('on' typeNotVoidList)? interfaces? |
| /// '{' (metadata classMemberDeclaration)* '}' |
| /// |
| /// @description Check that it is a compile-time error if 'base', 'interface' or |
| /// 'final' modifiers are placed before an `abstract` modifier |
| /// @author sgrekhov22@gmail.com |
| |
| base abstract class C1 {} |
| //^^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| |
| interface abstract class C2 {} |
| //^^^^^^^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| |
| final abstract class C3 {} |
| // ^^^^^^^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| |
| main() { |
| print(C1); |
| print(C2); |
| print(C3); |
| } |
