How to get a pointer from a reference?

Question

There seems to be many relavent questions talking about pointer vs. reference, but I couldn\'t find what I want to know. Basically, an object is passed in by a reference:

Answer 1

The general solution is to use std::addressof, as in:

#include 

void foo(T & x)
{
    T * p = std::addressof(x);
}

This works no matter whether T overloads operator& or not.