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// 2001-05-21 Benjamin Kosnik  <bkoz@redhat.com>
 
// Copyright (C) 2001, 2002, 2003, 2004 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.
 
// 27.8.1.4 Overridden virtual functions
 
#include <streambuf>
#include <locale>
#include <cwchar>
#include <testsuite_hooks.h>
 
class MyTraits : public std::char_traits<wchar_t>
{
public:
  static bool eq(wchar_t c1, wchar_t c2)
  {
    bool test __attribute__((unused)) = true;
    VERIFY( c1 != L'X' );
    VERIFY( c2 != L'X' );
    return std::char_traits<wchar_t>::eq(c1, c2);
  }
};
 
class MyBuf : public std::basic_streambuf<wchar_t, MyTraits>
{
  wchar_t buffer[8];
 
public:
  MyBuf()
  {
    std::wmemset(buffer, L'X', sizeof(buffer) / sizeof(buffer[0]));
    std::wmemset(buffer + 2, L'f', 4);
    setg(buffer + 2, buffer + 2, buffer + 6);
  }
};
 
// libstdc++/9538
void test08()
{
  bool test __attribute__((unused)) = true;
 
  MyBuf mb;
  mb.sputbackc(L'a');
}
 
int main() 
{
  test08();
  return 0;
}