#include <iostream>
#include <sstream> //for std::ostringstream

struct Trace
{
   std::ostringstream ss;

   template<typename T>
   Trace& operator << (T const & data)
   {
        ss << data;
        return *this;
   }
   ~Trace()
   {
       std::cout << ss.str() << std::endl;
   }
};

int main()
{
    Trace() << "Hello World\n" << 100 << "\nBye\n";
}