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From: Zelphir Kaltstahl <zelphirkaltstahl@posteo.de>
To: Ihor Radchenko <yantar92@posteo.net>
Cc: Bruno Barbier <brubar.cs@gmail.com>,
	emacs-orgmode@gnu.org, Bastien <bzg@gnu.org>
Subject: Re: [BUG] Inconsistent global/local :var assignments in ob-* for lisps and non-lisps (was: org-babel guile source block bug in handling multiple values)
Date: Sat, 11 Mar 2023 18:30:31 +0000	[thread overview]
Message-ID: <d6988c6d-1484-be17-fc8c-cecabcc36e95@posteo.de> (raw)
In-Reply-To: <878rg3y5he.fsf@localhost>

On 3/11/23 10:58, Ihor Radchenko wrote:
> Zelphir Kaltstahl <zelphirkaltstahl@posteo.de> writes:
>
>> The issue is not with defining via (define ...) inside a (let ...) in Guile. It
>> is about importing macros at the time, when the body of the (let ...) is already
>> evaluated, which is at a later phase than macro expansion. By wrapping inside a
>> (let ...) org has moved the import to a later phase, which causes the macro
>> (let-values ...) to not be expanded.
> I see.
> AFAIK, Elisp does not have this problem.
>
>> As far as I know, (defun ...) and (defvar ...) are merely defining functions and
>> variables, not macros.
> Same for defmacro in Elisp.
>
>> My point is, that imports are usually global for sessions. But :var decided for
>> let-wrapping, moving them to a different place. Just like imports are usually
>> global, I would expect (define ...)s to be global in the session, unless I put
>> them inside a narrowed scope like a (let ...) myself. The org generated (let
>> ...) is invisible to the user and thus confusing, at least for GNU Guile.
>>
>> For other Schemes it probably all depends on how their phases of expansion and
>> evaluation work. I don't know enough about the Scheme standards, to tell,
>> whether Guile has the correct behavior here or whether there is a correct
>> behavior defined in the Scheme standards. Maybe someone more knowledgeable can
>> chime in to comment on that.
> When saying Guile I mean scheme. Remember that I am now looking from a
> more general perspective of other ob-* libraries.
>
> My conclusion so far is that it is not safe in ob-scheme to use
> let-binding. Other ob-* lisp implementations may be OK (at least,
> ob-emacs-lisp is OK).
>
> Now, the main question is whether it is safe to use `define' in all the
> scheme implementations. If it is, would you be interested in turning
> your personal fix into a patch for ob-scheme?

Sure! Would need to familiarize myself with with process of doing that, but why not.

I guess it would be a safer bet to await, whether the patch is what the general 
solution should be. Or would a patch be good to have, regardless of whether the 
official implementation changes or not, so that others can apply it perhaps, 
instead of putting something in their personal init file?

-- 
repositories: https://notabug.org/ZelphirKaltstahl



  reply	other threads:[~2023-03-11 18:31 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-03-07 11:27 org-babel guile source block bug in handling multiple values Zelphir Kaltstahl
2023-03-07 14:36 ` Ihor Radchenko
2023-03-07 15:18   ` Zelphir Kaltstahl
2023-03-07 19:52     ` Bruno Barbier
2023-03-08  0:55       ` Zelphir Kaltstahl
2023-03-08 19:38         ` Bruno Barbier
2023-03-09  0:44           ` Zelphir Kaltstahl
2023-03-09 13:04             ` [BUG] Inconsistent global/local :var assignments in ob-* for lisps and non-lisps (was: org-babel guile source block bug in handling multiple values) Ihor Radchenko
2023-03-10 10:39               ` Zelphir Kaltstahl
2023-03-11  9:58                 ` Ihor Radchenko
2023-03-11 18:30                   ` Zelphir Kaltstahl [this message]
2023-03-12 11:33                     ` Ihor Radchenko
2023-03-19 13:50                   ` [PATCH] lisp/ob-scheme.el Zelphir Kaltstahl
2023-03-22 10:43                     ` Ihor Radchenko
2023-03-25 14:34                       ` Zelphir Kaltstahl
2023-03-26  9:32                         ` Ihor Radchenko
2023-04-25 12:28                         ` Ihor Radchenko
2023-04-29 11:08                           ` Zelphir Kaltstahl
2023-03-09 13:10             ` org-babel guile source block bug in handling multiple values Ihor Radchenko
2023-03-10 10:42               ` Zelphir Kaltstahl
2023-03-11 10:18                 ` Ihor Radchenko
2023-06-02 13:11                   ` Ihor Radchenko
2023-03-09 13:11             ` Ihor Radchenko
2023-03-09 14:21               ` Daniel Kraus
2023-03-10 11:57                 ` Ihor Radchenko
2023-03-10 10:45               ` Zelphir Kaltstahl
2023-03-08  1:13       ` Zelphir Kaltstahl
2023-03-08  8:55         ` Ihor Radchenko
2023-03-07 15:44 ` Max Nikulin
2023-03-07 21:41 ` Rudolf Adamkovič

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