// Copyright (c) 2024, 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 It is a syntax error if a built-in identifier is used as the
/// declared name of a prefix, class, mixin, enum, type parameter, type alias,
/// or extension.
///
/// @description Checks that it is a compile-time error if a built-in identifier
/// `library` is used as the name, type parameter or alias of an extension type
/// @author sgrekhov22@gmail.com

extension type library(int _) {}
//             ^^^^^^^
// [analyzer] unspecified
// [cfe] unspecified

extension type ListET<library>(List<library> _) {}
//                    ^^^^^^^
// [analyzer] unspecified
// [cfe] unspecified

extension type ET(int _) {}

typedef library = ET;
//      ^^^^^^^
// [analyzer] unspecified
// [cfe] unspecified

main() {
}