#include <iostream>
 
template<typename T, typename className, typename... _Args>
struct RuntimeClass
{
   T (className::*m_pfnFunction)(_Args... __args);
};
 
#define DECL_RUNTIMECLASS(T, className, ...) \
   static RuntimeClass<T, className, __VA_ARGS__> class_##className;
 
#define IMPL_RUNTIMECLASS(T, className, pfnFunc, ...) \
RuntimeClass<T, className, __VA_ARGS__> className::class_##className = { (pfnFunc) };
 
class TestClass
{
public:
   int TestFunc(int v);
   DECL_RUNTIMECLASS(int, TestClass, int)
};
 
int TestClass::TestFunc(int v)
{
   return v;
}
 
IMPL_RUNTIMECLASS(int, TestClass, &TestClass::TestFunc, int)
 
int main()
{
 
   TestClass b;
   std::cout<<(b.*b.class_TestClass.m_pfnFunction)(42)<<std::endl;
}

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