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

   1 // 1999-10-11 bkoz
   2
   3 // Copyright (C) 1999-2017 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 3, 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 COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20
  21 #include <fstream>
  22 #include <ostream>
  23 #include <testsuite_hooks.h>
  24
  25 // test03
  26 // http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00151.html
  27 template<typename charT, typename traits = std::char_traits<charT> >
  28   class basic_nullbuf : public std::basic_filebuf<charT, traits>
  29   {
  30   protected:
  31     typedef typename
  32       std::basic_filebuf<charT, traits>::int_type int_type;
  33     virtual int_type
  34     overflow(int_type c)
  35     {  return traits::not_eof(c); }
  36   };
  37
  38 typedef basic_nullbuf<char> nullbuf;
  39
  40 template<typename T>
  41   char
  42   print(const T& x)
  43   {
  44    nullbuf ob;
  45    std::ostream out(&ob);
  46    out << x << std::endl;
  47    return (!out ? '0' : '1');
  48  }
  49
  50 void test03()
  51 {
  52   const std::string control01("11111");
  53   std::string test01;
  54
  55   test01 += print(true);
  56   test01 += print(3.14159);
  57   test01 += print(10);
  58   test01 += print('x');
  59   test01 += print("pipo");
  60
  61   VERIFY( test01 == control01 );
  62 }
  63
  64 int main()
  65 {
  66   test03();
  67   return 0;
  68 }