// 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.

// @dart = 2.9

/// @assertion An equality check like [MyList(object) == x] is always disallowed
/// because an extension cannot declare a member named [==], and [MyList(object)
/// != x] is disallowed because it's also defined in terms of a member named
/// [==].
/// @description Check that it's not allowed to use [==] and [!=]construction for
/// the extensions.
/// @author iarkh@unipro.ru

extension MySimpleExt on String {
  bool get test => false;
  int getANum() => 12345;
  void tryme() {}
}

main() {
  bool res1 = MySimpleExt("testme") == true; //# 01: compile-time error
  var  res2 = MySimpleExt("testme") == 14;   //# 02: compile-time error

  bool res3 = MySimpleExt("testme") != true; //# 03: compile-time error
  var  res4 = MySimpleExt("testme") != 128;  //# 04: compile-time error
}