| /* |
| * 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 an extension declaration is a top-level declaration with a grammar |
| * similar to: |
| * <extension> ::= |
| * `extension' <identifier>? <typeParameters>? `on' <type> `?'? `{' |
| * memberDeclaration* |
| * `}' |
| * ... |
| * The member declarations can be any non-abstract static or instance member |
| * declaration except for instance variables and constructors, and they cannot |
| * have the same name as a member declared by Object (==, hashCode , toString, |
| * runtimeType or noSuchMethod) |
| * |
| * @description Check that it is a compile error if extension declares an |
| * instance variable, constructor or abstract method |
| * @author sgrekhov@unipro.ru |
| */ |
| |
| |
| extension ExtendedList<T> on List<T> { |
| int instanceVar; |
| // [error line 26, column 0] |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| String _privateInstanceVar; |
| // [error line 30, column 0] |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| ExtendedList() {} |
| //^^^^^^^^^^^^ |
| // [analyzer] SYNTACTIC_ERROR.EXTENSION_DECLARES_CONSTRUCTOR |
| // [cfe] Extensions can't declare constructors. |
| ExtendedList.named(int i) {} |
| //^^^^^^^^^^^^ |
| // [analyzer] SYNTACTIC_ERROR.EXTENSION_DECLARES_CONSTRUCTOR |
| // [cfe] Extensions can't declare constructors. |
| void abstractMethod(String v); |
| // ^^^^^^^^^^^^^^ |
| // [analyzer] SYNTACTIC_ERROR.EXTENSION_DECLARES_ABSTRACT_MEMBER |
| // [cfe] Extensions can't declare abstract members. |
| } |
| |
| main() { |
| List<String> list = ["Lily", "was", "here"]; |
| } |
