[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
REC and LETREC
> linus!ramsdell@mitre-bedf / 11:41 pm Mar 29, 1985 ****/
> An English name for REC is PROCEDURE. After all, that is
> what it returns. By the way, is the predicate PROCEDURE?
REC may not return a procedure, as in
(rec foo (cons exp (lambda () ...foo...))).
I think we agreed to omit PROCEDURE?, since it doesn't do much good to
know something is a procedure (without knowing how many args it wants,
whether it ever returns, etc.).
> Could some one explain why LETREC is preferable to LABELS?
LETREC is what it seems, a recursive variant of LET. LABELS? only
expresses that it has something to do with naming (labeling) things.