#include <cstdio>
#include <stdexcept>

struct throw_site
{
     throw_site(char const* file, int line)
         : file_(file), line_(line)
     {}

     char const* file_;
     int line_;
};

template<class exception>
struct wrapper : exception, throw_site
{
     wrapper(exception const& e, throw_site const& s)
         : exception(e), throw_site(s)
     {}
};

template<class exception>
void operator+(throw_site const& s, exception const& e)
{
     throw wrapper<exception>(e, s);
}

#define throw throw_site(__FILE__, __LINE__) +

int main()
{
     try
     {
         throw std::runtime_error("oops");
     }
     catch(std::exception& e)
     {
         if(throw_site* s = dynamic_cast<throw_site*>(&e))
         {
             fprintf(stderr, "thrown at %s:%d\n", s->file_, s->line_);
         }
     }
}