From: Ihor Radchenko <yantar92@gmail.com>
To: Jonas Bernoulli <jonas@bernoul.li>
Cc: emacs-orgmode@gnu.org
Subject: Re: Post-process table without changing result for empty table(/list)
Date: Tue, 04 Oct 2022 10:55:47 +0800 [thread overview]
Message-ID: <874jwkwb4c.fsf@localhost> (raw)
In-Reply-To: <871qrovh7g.fsf@bernoul.li>
Jonas Bernoulli <jonas@bernoul.li> writes:
> It used to behave like that before 51a628bc5efc from 2009, which started
> turning all symbols, including nil, into strings, but without giving any
> reason why that should be done.
>
> It has worked like this for a long time now, so reverting that is
> probably not feasible in the short run. However, I feel it would
> make sense to change now how nil/'() is treated. Currently it is
> being treated as the symbol nil, but IMO it would make more sense
> to treat it as the empty list. That could be achieved with
>
> diff --git a/lisp/ob-ref.el b/lisp/ob-ref.el
> index b79e47900..2b4a16aea 100644
> --- a/lisp/ob-ref.el
> +++ b/lisp/ob-ref.el
> @@ -199,7 +199,7 @@ (defun org-babel-ref-resolve (ref)
> (org-babel-execute-src-block nil info params))))
> (error "Reference `%s' not found in this buffer" ref))))
> (cond
> - ((symbolp result) (format "%S" result))
> + ((and result (symbolp result)) (format "%S" result))
> ((and index (listp result))
> (org-babel-ref-index-list index result))
> (t result)))))))))
Looks reasonable.
Could you please prepare a patch and possibly also add a test that
covers your use-case to testing/lisp/test-ob.el?
See https://orgmode.org/worg/org-contribute.html
> In the long run you might want to consider not turning any symbols
> into strings, at least not when the "regular" block as well as the
> post-processing block both use elisp.
This may be tricky. Introducing any kind of special case will make the
code fragile. We should better make things as generic as possible.
--
Ihor Radchenko // yantar92,
Org mode contributor,
Learn more about Org mode at <https://orgmode.org/>.
Support Org development at <https://liberapay.com/org-mode>,
or support my work at <https://liberapay.com/yantar92>
next prev parent reply other threads:[~2022-10-04 2:56 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-03 19:29 Post-process table without changing result for empty table(/list) Jonas Bernoulli
2022-10-04 2:55 ` Ihor Radchenko [this message]
2022-10-04 14:00 ` Jonas Bernoulli
2022-10-05 7:37 ` Ihor Radchenko
2022-10-05 13:21 ` [PATCH 0/1] Allow returning empty list from post-processing block Jonas Bernoulli
2022-10-05 13:21 ` [PATCH 1/1] " Jonas Bernoulli
2022-10-06 3:15 ` Ihor Radchenko
2022-10-06 11:11 ` [PATCH v1] " Jonas Bernoulli
2022-10-07 4:09 ` Ihor Radchenko
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