- (LISTING! [(INITIAL <tail>)] ...)syntax
- (LISTING-INTO! <pair> [(INITIAL <tail>)] ...)syntax
Usage:
(FOR <result> (LISTING! [(INITIAL <tail>)] ...)) (FOR <result> (LISTING-INTO! <pair> [(INITIAL <tail>)] ...))
LISTING! builds up a list with a final cdr of <tail>. LISTING-INTO! builds up a list with a final cdr of <tail> and destructively stores it in the cdr of <pair>. Both use as little intermediate storage as possible, which may involve using destructive operations, and as a consequence are non-reentrant.
<Tail>, if supplied, is evaluated once in the environment outside the loop. The default value of <tail> is the empty list.
<Result> is a final variable.