// B2.9.cpp : Defines the entry point for the console application.
//
// Please provide the definition of a template-based class that provides 
// a function object that returns a string representing the type of the 
// object that invoked it and the type of the template parameter.  
// Show how a client will use this function.

#include "stdafx.h"
#include <string>
#include <iostream>
using namespace std;

template <class T> class functor {

public:
  std::string operator()() {
    string types = "  invoker type: ";
    types += typeid(*this).name();
    types += "\n  template parameter type: ";
    types += typeid(T).name();
    return types;
  }
};

int _tmain(int argc, _TCHAR* argv[])
{
  std::cout << "\n  Exam B2 - Question #9 "
            << "\n =======================\n";

  // functor style of invocation

  functor<double> myTypes;
  cout << myTypes().c_str();
  cout << "\n\n";

  // alternate way of invoking that shows invoker more clearly
  
  cout << (myTypes.operator()()).c_str();
  cout << "\n\n";
  return 0;
}