// Copyright (C) 2008-2023 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3.  If not see
// <http://www.gnu.org/licenses/>.

// 27.6.1.5 - Template class basic_iostream 

#include <iostream>

class mystream
: public std::iostream
{
public:
  mystream () { };
};

// libstdc++/16251
void test01()
{
  mystream x;
  x.rdbuf(std::cout.rdbuf());
  x << std::endl;
}

int main()
{
  test01();
  return 0;
}