#include <stdexcept>
#include <iostream>
#include <boost/lexical_cast.hpp>

#define ECHO(S) std::cerr << S << std::endl

struct Escape
{
  Escape(const std::string& s)
    : str_(s)
  {}

  std::string str_;
};

inline
std::ostream&
operator<< (std::ostream& o, const Escape& rhs)
{
  return o << rhs.str_;
}

int
main()
{
  try
    {
      std::cerr << boost::lexical_cast<std::string>(Escape("")) << std::endl;
      ECHO("pass");
    }
  catch (std::exception& e)
    {
      ECHO("FAIL: " << e.what());
    }
}