//<type> &<alias> = <reference var>
//<type> &<alias>

//Example:
   int a; 
   int &r = a; // declares a reference to the integer object "a"

int value;    // declares an integer
int &a_value = value; // declares a reference to the integer object value

Another name for the same thing
// & = 
// &

alias define (reference)

C++