address-of

address-of

type: function (subr) 
location: built-in
source file: xlsys.c
Common LISP compatible: no
supported on: all machines

SYNTAX

(address-of <expr> )
        <expr>          -       an expression

DESCRIPTION

The ADDRESS-OF function returns the internal memory address of the XLISP node that corresponds to <expr>. The value returned is an integer.

EXAMPLES

(setq var 0)                            ; set up VAR with 0
(address-of var)                        ; returns 123224
(address-of 'var)                       ; returns 182638
(peek (address-of var))                 ; returns 83951616
(peek (1+ (address-of var)))            ; returns 16777216
(peek (+ 2 (address-of var)))           ; returns 0  <-- value of VAR
(setq var 14)                           ; change the value to 14
(peek (+ 2 (address-of var)))           ; returns 14
(setq var 99)                           ; change the value to 99
(peek (+ 2 (address-of var)))           ; returns 99

CAUTION: Be careful when modifying the internal state of XLISP. If you have modified it, it would be a good idea to exit XLISP and re-enter before doing any work you really want to retain.