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
}

>>25

As >>21 said, that information lives in the v-tables.  AFAIK, *only* in the V-tables.  V-tables are not part of the standard language, but rather an implementation detail.  There is no standard or portable way to get what you want.  Period.  End of story.  C++ has no reflection or introspection capabilities.  Period.

You can not get a pointer to some arbitrary language construct that represents a type.  Period.  No facility exists for that within the entire language.

As has been stated previously, introspection is a very high-level language concept.  A language that's close to the silicon, like C or C++, is unlikely to expose such things.

(And wrapping all your classes to accomplish this idea is rather silly and probably quite inefficient.  If you're doing anything useful with those wrappers, anyhow.)