gomp-20050608-branch/libstdc++-v3/testsuite/27_io/basic_streambuf/overflow/char/2.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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  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 // 27.5.2 template class basic_streambuf
  31
  32 #include <streambuf>
  33 #include <ostream>
  34 #include <string>
  35 #include <testsuite_hooks.h>
  36
  37 // test03
  38 // http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00151.html
  39 template<typename charT, typename traits = std::char_traits<charT> >
  40   class basic_nullbuf : public std::basic_streambuf<charT, traits>
  41   {
  42   protected:
  43     typedef typename
  44       std::basic_streambuf<charT, traits>::int_type int_type;
  45     virtual int_type
  46     overflow(int_type c)
  47     {  return traits::not_eof(c); }
  48   };
  49
  50 typedef basic_nullbuf<char> nullbuf;
  51
  52 template<typename T>
  53   char
  54   print(const T& x)
  55   {
  56    nullbuf ob;
  57    std::ostream out(&ob);
  58    out << x << std::endl;
  59    return (!out ? '0' : '1');
  60  }
  61
  62 void test03()
  63 {
  64   bool test __attribute__((unused)) = true;
  65   const std::string control01("11111");
  66   std::string test01;
  67
  68   test01 += print(true);
  69   test01 += print(3.14159);
  70   test01 += print(10);
  71   test01 += print('x');
  72   test01 += print("pipo");
  73
  74   VERIFY( test01 == control01 );
  75 }
  76
  77 int main()
  78 {
  79   test03();
  80   return 0;
  81 }