libstdc++-v3/testsuite/27_io/basic_filebuf/overflow/char/1.cc

   1 // 1999-10-11 bkoz
   2
   3 // Copyright (C) 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 2, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING.  If not, write to the Free
  18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  19 // USA.
  20
  21 // As a special exception, you may use this file as part of a free software
  22 // library without restriction.  Specifically, if other files instantiate
  23 // templates or use macros or inline functions from this file, or you compile
  24 // this file and link it with other files to produce an executable, this
  25 // file does not by itself cause the resulting executable to be covered by
  26 // the GNU General Public License.  This exception does not however
  27 // invalidate any other reasons why the executable file might be covered by
  28 // the GNU General Public License.
  29
  30 #include <fstream>
  31 #include <ostream>
  32 #include <testsuite_hooks.h>
  33
  34 // test03
  35 // http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00151.html
  36 template<typename charT, typename traits = std::char_traits<charT> >
  37   class basic_nullbuf : public std::basic_filebuf<charT, traits>
  38   {
  39   protected:
  40     typedef typename
  41       std::basic_filebuf<charT, traits>::int_type int_type;
  42     virtual int_type
  43     overflow(int_type c)
  44     {  return traits::not_eof(c); }
  45   };
  46
  47 typedef basic_nullbuf<char> nullbuf;
  48
  49 template<typename T>
  50   char
  51   print(const T& x)
  52   {
  53    nullbuf ob;
  54    std::ostream out(&ob);
  55    out << x << std::endl;
  56    return (!out ? '0' : '1');
  57  }
  58
  59 void test03()
  60 {
  61   bool test __attribute__((unused)) = true;
  62   const std::string control01("11111");
  63   std::string test01;
  64
  65   test01 += print(true);
  66   test01 += print(3.14159);
  67   test01 += print(10);
  68   test01 += print('x');
  69   test01 += print("pipo");
  70
  71   VERIFY( test01 == control01 );
  72 }
  73
  74 int main()
  75 {
  76   test03();
  77   return 0;
  78 }