Re: Slow Loop (alternatives in lisp?)

On 2024-07-22, B. Pym <Nobody447095@here-nor-there.org> wrote:

* there is already a WHILE in Common Lisp. No need to invent a new one:
 
(loop while (foo-p) do .... )

>
Gauche Scheme
>
(while (read) (print "True enough."))
2
True enough.
#t
True enough.
'yes
True enough.
#f
>
(while (read) => x (print x " is truer than you think."))

[ ... ]

Paul Graham:
>
I consider Loop one of the worst flaws in CL, and an example
to be borne in mind by both macro writers and language designers.

But the above => cruft is exactly like LOOP clause syntax.

It might as well be

 (while (read) with x do (print ...))

More Lispy way:

  (whilet ((x (read)))
    ...)