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

   1 // 2005-06-07 Benjamin Kosnik
   2
   3 // Copyright (C) 2005-2024 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 #include <sstream>
  21 #include <testsuite_hooks.h>
  22 #include <stdexcept>
  23
  24 double
  25 test_stringstream()
  26 {
  27   double result;
  28   const char* source = "1918";
  29   std::stringstream s;
  30   s << source;
  31
  32   std::string tmp = s.str();
  33   std::streambuf* sb = s.rdbuf();
  34   int i = sb->in_avail();
  35
  36   if (i)
  37     {
  38       s >> result;
  39     }
  40   else
  41     {
  42       throw std::runtime_error("conversion failed");
  43     }
  44   return result;
  45 }
  46
  47
  48 int main ()
  49 {
  50   test_stringstream();
  51   return 0;
  52 }