text: // 2001-05-21 Benjamin Kosnik  <bkoz@redhat.com>
  
  // Copyright (C) 2001-2013 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/>.
  
  // 27.8.1.4 Overridden virtual functions
  
  #include <fstream>
  #include <testsuite_hooks.h>
  
  const char name_05[] = "filebuf_virtuals-5.txt"; // empty file, need to create
  
  bool over_called;
  
  class Derived_filebuf : public std::filebuf
  {
  public:
    int_type overflow(int_type c)
    {
      over_called = true;
      return std::filebuf::overflow(c);
    }
    
    const char_type* pub_epptr() const
    { return epptr(); }
    
    const char_type* pub_pptr() const
    { return pptr(); }
  };
  
  // libstdc++/9701 (partial)
  void test11()
  {
    bool test __attribute__((unused)) = true;
  
    bool over_expected;
  
    // sputc
    Derived_filebuf dfbuf_01;
    dfbuf_01.open(name_05, std::ios_base::out);
    over_called = false;
    dfbuf_01.sputc('i');
    VERIFY( over_called );
    over_expected = dfbuf_01.pub_epptr() == dfbuf_01.pub_pptr();
    over_called = false;
    dfbuf_01.sputc('v');
    VERIFY( (!over_expected && !over_called)
  	  || (over_expected && over_called) );
    dfbuf_01.close();
  }
  
  int main() 
  {
    test11();
    return 0;
  }
  