| /* |
| * Copyright (c) 2020, 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 variableDeclaration: |
| * declaredIdentifier (‘, ’ identifier)* |
| * ; |
| * declaredIdentifier: |
| * metadata finalConstVarOrType identifier |
| * ; |
| * finalConstVarOrType: |
| * final type? | |
| * const type? | |
| * varOrType |
| * ; |
| * varOrType: |
| * var | |
| * type |
| * ; |
| * initializedVariableDeclaration: |
| * declaredIdentifier (‘=’ expression)? (‘, ’ initializedIdentifier)* |
| * ; |
| * initializedIdentifier: |
| * identifier (‘=’ expression)? |
| * ; |
| * initializedIdentifierList: |
| * initializedIdentifier (‘, ’ initializedIdentifier)* |
| * ; |
| * @description Checks that an abstract variable must be in an abstract class |
| * See https://github.com/dart-lang/language/tree/master/accepted/future-releases/abstract-external-fields |
| * @compile-error |
| * @author sgrekhov@unipro.ru |
| * @issue 42980 |
| */ |
| |
| class C { |
| abstract int? x; |
| } |
| |
| main() { |
| new C(); |
| } |