gistfile1.txt

#include <cstddef>
#include <cstdio>
#include <string>
#include <utility>

#include <boost/lexical_cast.hpp>
#include <boost/spirit/include/karma.hpp>

static const int max_i2s = 80000000;

inline bool karma_int_to_string(int value, std::string& str)
{
  using namespace boost::spirit;
  using boost::spirit::karma::generate;
  char buffer[16];
  char* x = buffer;
  if (!generate(x, int_, value))
     return false;
  str.assign(buffer, std::distance(buffer,x));
  return true;
}

int main()
{
   for (int i = (-max_i2s / 2); i < (max_i2s / 2); ++i)
   {
      std::string s1;

      karma_int_to_string(i,s1);

      std::string s2 = boost::lexical_cast<std::string>(i);

      if (s1 != s2)
      {
         printf("ERROR s1:%s\ts2:%s\n",s1.c_str(),s2.c_str());
      }
   }

   return 0;
}