libstdc++-v3/testsuite/27_io/basic_stringbuf/in_avail/char/21955.cc

   1 // 2005-06-07 Benjamin Kosnik
   2
   3 // Copyright (C) 2005, 2006
   4 // Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 2, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING.  If not, write to the Free
  19 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  20 // USA.
  21
  22 #include <sstream>
  23 #include <testsuite_hooks.h>
  24 #include <stdexcept>
  25
  26 double
  27 test_stringstream()
  28 {
  29   double result;
  30   const char* source = "1918";
  31   std::stringstream s;
  32   s << source;
  33
  34   std::string tmp = s.str();
  35   std::streambuf* sb = s.rdbuf();
  36   int i = sb->in_avail();
  37
  38   if (i)
  39     {
  40       s >> result;
  41     }
  42   else
  43     {
  44       throw std::runtime_error("conversion failed");
  45     }
  46   return result;
  47 }
  48
  49
  50 int main ()
  51 {
  52   test_stringstream();
  53   return 0;
  54 }