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| NNTP-Posting-Date | Sat, 10 Aug 2024 20:23:05 +0000 |
| From | steve g <sgonedes1977@gmail.com> |
| Newsgroups | gnu.emacs.help |
| Subject | Re: TCO with named-let via macros |
| References | <m11q42e6zz.fsf@void.com> <8734oi5ksx.fsf@axel-reichert.de> <m1ttgxhkp3.fsf@void.com> |
| Date | Sat, 10 Aug 2024 16:22:54 -0400 |
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Richard Smith <null@void.com> writes:
> Axel - I know that elisp doesn't optimise if an expressed recursive
> function is tail-recursive.
actually the byte-compiler does do tail recursive optimizations.
> A practical work-around is an alterative approach using the looping
> built-in's like "dotimes" (?) - where a recursive approach would have
> minimalistic beauty.
> Regards, Rich S
check the elisp manual. it shows how to implement true tail recursion in
emacs.
(defun elisp-sum (args)
(elisp-sum-aux args 0))
(defun elisp-sum-aux (args res)
(if (null args)
res
(elisp-sum-aux (cdr args) (+ (car args) res))))
you can byte compile it. very simple.
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thanks - calculate pi fn. in elisp Richard Smith <null@void.com> - 2024-07-09 19:48 +0100
TCO with named-let via macros (was: thanks - calculate pi fn. in elisp) Axel Reichert <mail@axel-reichert.de> - 2024-07-09 23:15 +0200
Re: TCO with named-let via macros Richard Smith <null@void.com> - 2024-07-10 06:28 +0100
Re: TCO with named-let via macros steve g <sgonedes1977@gmail.com> - 2024-08-10 15:56 -0400
Re: TCO with named-let via macros Richard Smith <null@void.com> - 2024-08-10 22:28 +0100
Re: TCO with named-let via macros Richard Smith <null@void.com> - 2024-07-10 06:36 +0100
Re: TCO with named-let via macros steve g <sgonedes1977@gmail.com> - 2024-08-10 16:22 -0400
Re: TCO with named-let via macros Axel Reichert <mail@axel-reichert.de> - 2024-08-10 23:15 +0200
Re: TCO with named-let via macros steve g <sgonedes1977@gmail.com> - 2024-08-11 14:56 -0400
Re: TCO with named-let via macros Richard Smith <null@void.com> - 2025-04-08 10:26 +0100
Re: TCO with named-let via macros Richard Smith <null@void.com> - 2024-07-10 06:59 +0100
Re: TCO with named-let via macros Richard Smith <null@void.com> - 2024-07-10 09:18 +0100
Re: TCO with named-let via macros steve g <sgonedes1977@gmail.com> - 2024-08-10 16:26 -0400
Re: TCO with named-let via macros Richard Smith <null@void.com> - 2024-08-10 22:51 +0100
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