libstdc++-v3/testsuite/27_io/basic_streambuf/overflow/char/2.cc

   1 // 1999-10-11 bkoz
   2
   3 // Copyright (C) 1999-2016 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 // 27.5.2 template class basic_streambuf
  22
  23 #include <streambuf>
  24 #include <ostream>
  25 #include <string>
  26 #include <testsuite_hooks.h>
  27
  28 // test03
  29 // http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00151.html
  30 template<typename charT, typename traits = std::char_traits<charT> >
  31   class basic_nullbuf : public std::basic_streambuf<charT, traits>
  32   {
  33   protected:
  34     typedef typename
  35       std::basic_streambuf<charT, traits>::int_type int_type;
  36     virtual int_type
  37     overflow(int_type c)
  38     {  return traits::not_eof(c); }
  39   };
  40
  41 typedef basic_nullbuf<char> nullbuf;
  42
  43 template<typename T>
  44   char
  45   print(const T& x)
  46   {
  47    nullbuf ob;
  48    std::ostream out(&ob);
  49    out << x << std::endl;
  50    return (!out ? '0' : '1');
  51  }
  52
  53 void test03()
  54 {
  55   bool test __attribute__((unused)) = true;
  56   const std::string control01("11111");
  57   std::string test01;
  58
  59   test01 += print(true);
  60   test01 += print(3.14159);
  61   test01 += print(10);
  62   test01 += print('x');
  63   test01 += print("pipo");
  64
  65   VERIFY( test01 == control01 );
  66 }
  67
  68 int main()
  69 {
  70   test03();
  71   return 0;
  72 }