LanguageFeatures/Extension-methods/syntax_scope_t05.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 if there are two libraries with the same name, the
/// one declared in this scope shadows an imported one
/// @author sgrekhov@unipro.ru


import "../../Utils/expect.dart";
import "syntax_scope_t05_lib.dart";

main() {
  List<String> list = ["Lily", "was", "here"];
  Expect.equals(12, list.doubleLength);
  Expect.equals("I'm an extension that hides another one", list.whoAmI);
}