def a function

//def a function to lua    
lua_tinker::def(L, "Number2Interger", &Number2Interger);    
  
//def a std::function to lua    
std::function<void(int,int)> func = [](int k,int j) 
                                     {std::cout << "test_p_int1(" << k <<"," << j << ")" << std::endl;};    
lua_tinker::def(L, "test_p_int1", func);	//can hold function    
  
  
//def a overload_function to lua    
lua_tinker::def(L, "test_overload", lua_tinker::args_type_overload_functor(
lua_tinker::make_functor_ptr((int(*)(int)) (&test_overload)),
lua_tinker::make_functor_ptr((int(*)(int, double))(&test_overload)),
lua_tinker::make_functor_ptr((int(*)(int, int, double))(&test_overload))));