How to obtain pointer to reference member?

Question

Consider this code:

struct AA
{
    int& rr;
};

Is there a way to obtain pointer (or maybe reference) to AA::rr in order to obtain this?

AA* aa;
auto mm = &AA::rr; // error: cannot create pointer to reference member ‘AA::rr’
aa ->* mm;

Also in gcc-7.0.1 decltype(AA::mm) is just int&. Is this according to the standard? And does this make sense?

---

EDIT

Sorry guys, I formulated the question not quite well. No complaints to the fact that references are not objects or that there is no such thing as pointer to a reference. The goal is quite selfish. Given struct AA { int& rr; }; I just want to have a function like this:

template < typename Class, typename Member >
void test(Member Class::*) { }

that when calling test(&AA::rr) I want Class to be AA and Member to be int& or int. So I don't even need the pointer itself but its type that will allow to retrieve the class type and the member type.

Answer 1

How to obtain pointer to reference (member)?

You cannot obtain a pointers to (or references to, or arrays of) references. There is no such type as "pointer to reference" in C++. This is because references are not required to have storage, so there might not even be an address where the reference is stored.

When you apply addressof operator on a reference, what you get is the address of the object that is referred to.