LanguageFeatures/Extension-methods/syntax_scope_t03.dart

// 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


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"];
}