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// Copyright (C) 2005 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 2, 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 COPYING.  If not, write to the Free

// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,

// USA.

// As a special exception, you may use this file as part of a free software

// library without restriction.  Specifically, if other files instantiate

// templates or use macros or inline functions from this file, or you compile

// this file and link it with other files to produce an executable, this

// file does not by itself cause the resulting executable to be covered by

// the GNU General Public License.  This exception does not however

// invalidate any other reasons why the executable file might be covered by

// the GNU General Public License.

// 27.6.2.3 class basic_ostream::sentry

#include <ostream>

#include <sstream>

#include <testsuite_hooks.h>

// libstdc++/9563

struct buf : std::wstreambuf

{

  std::wios *io_;

  buf(std::wios *io)

  : io_(io) { }

  virtual int

  sync()

  {

    io_->setstate (std::wios::failbit);

    return 0;

  }

};

void

test02()

{

  bool test __attribute__((unused)) = true;

  buf b(0);

  std::wostream strm(&b);

  buf tb(&strm);

  std::wostream tied(&tb);

  strm.tie(&tied);

  std::wostream::sentry s(strm);

  VERIFY( !s );

}

int main()

{

  test02();

  return 0;

}