C++ typeid()

Does anyone know how typeid() is implemented in C++???
I mean, how do I make a function like typeid() where I can pass the TYPE as a paramter.

Example:
int main()
{
    typeid(int);//<-- works of course
    f(int);//<-- how to do something like this
           //        without using macros or templates
}

>>24
Yes yes, I understand what you mean.
But as I stated earlier in >>17
I do not intend to implement high-level wrappers around all my classes, because that is exactly what I am doing now.
Hence, why I said there should be a better way to do it, since C++ is a lower-level language.