| /* |
| * 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* |
| * `}' |
| * ... |
| * An extension declaration with a non-private name is included in the library's |
| * export scope, and a privately named extension is not. It is a compile-time |
| * error to export two declarations, including extensions, with the same name, |
| * whether they come from declarations in the library itself or from export |
| * declarations (with the usual exception when all but one declaration come from |
| * platform libraries). Extension members with private names are simply |
| * inaccessible in other libraries. |
| * |
| * @description Check that it is not a compile-time error to export two |
| * declarations, including extensions, with the same name, if one of them |
| * (library one) is hidden by other (declared in the current scope) |
| * @author sgrekhov@unipro.ru |
| */ |
| // SharedOptions=--enable-experiment=extension-methods |
| import "my_fancy_list_lib.dart"; |
| export "my_fancy_list_lib.dart"; |
| |
| extension MyFancyList<T> on List<T> { |
| int get doubleLength => this.length * 2; |
| List<T> operator-() => this.reversed.toList(); |
| List<List<T>> split(int at) => <List<T>>[this.sublist(0, at), this.sublist(at)]; |
| static String get className => "List"; |
| } |
| |
| main() { |
| List<String> list = ["Lily", "was", "here"]; |
| } |