* Problems with LaTeX export for $x\text{foo $x$}$-like construts?
@ 2022-12-28 13:57 Alain.Cochard
2022-12-29 10:04 ` Ihor Radchenko
0 siblings, 1 reply; 5+ messages in thread
From: Alain.Cochard @ 2022-12-28 13:57 UTC (permalink / raw)
To: emacs-orgmode
Version used: release_9.6-149-g554935
With an org file containing only
#+begin_export latex
$x \text{foo $y$}$
\(x \text{foo \(y\)}\)
$x \text{foo \(y\)}$
\(x \text{foo $y$}\)
#+end_export
the pdf generated upon latex export gives as expected, i.e., with 'x'
and 'y' in mathematical font.
Maybe this is fully normal, but I find it annoying: when the 4 lines
above are not within a latex block, only the last 2 (that is, with
mixed "$...$" and "\(...\)" constructs), are shown correctly on the
resulting pdf.
The 1st one shows, on the pdf
$x foo y$
(with 'y' in mathematical font).
The 2nd one (if alone in the org file) gives
File "/home/cochard/Org/debug.pdf" wasn’t produced. See "*Org PDF
LaTeX Output*" for details
PS/incidentally: if one adds a blank line and another line to that 2nd
one, i.e., if the org file contains something like
\(x \text{foo \(y\)}\)
foo
then a pdf is generated, which shows
x
foo
The *Messages* buffer contains
PDF file produced with errors.
Running /usr/bin/xdg-open /home/cochard/Org/debug.pdf...done
but only the last of those lines is seen in the minibuffer. So this
adds another example to those discussed in thread
https://list.orgmode.org/25477.57044.35186.766042@gargle.gargle.HOWL/
where one (at least I) would like to more permanently see "PDF file
produced with errors."
--
EOST (École et Observatoire des Sciences de la Terre)
ITE (Institut Terre & Environnement) | alain.cochard@unistra.fr
5 rue René Descartes [bureau 110] | Phone: +33 (0)3 68 85 50 44
F-67084 Strasbourg Cedex, France | [ slot available for rent ]
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: Problems with LaTeX export for $x\text{foo $x$}$-like construts?
2022-12-28 13:57 Problems with LaTeX export for $x\text{foo $x$}$-like construts? Alain.Cochard
@ 2022-12-29 10:04 ` Ihor Radchenko
2022-12-29 10:39 ` Alain.Cochard
2022-12-29 11:52 ` Ihor Radchenko
0 siblings, 2 replies; 5+ messages in thread
From: Ihor Radchenko @ 2022-12-29 10:04 UTC (permalink / raw)
To: alain.cochard; +Cc: emacs-orgmode
Alain.Cochard@unistra.fr writes:
> Version used: release_9.6-149-g554935
>
> With an org file containing only
>
> #+begin_export latex
> $x \text{foo $y$}$
>
> \(x \text{foo \(y\)}\)
>
> $x \text{foo \(y\)}$
>
> \(x \text{foo $y$}\)
> #+end_export
>
> the pdf generated upon latex export gives as expected, i.e., with 'x'
> and 'y' in mathematical font.
This is to be expected because of how Org parser works.
In particular, $-style math is tricky because Org allows "$" both as
math delimiter and also as standalone symbol. There are trade-offs.
For the \(...\), it is because Org parser does not understand nesting:
it takes first opening \( and match it with the first closing \) - thus
what you observe.
Unfortunately, I do not see an easy solution without hitting parser
performance. Our general approach is to avoid forward-parsing as much as
possible with an exception to paired brackets (because Elisp allows
parsing paired brackets fast using C-level code). However, AFAIK, there
is no easy way to parse brackets that are not single symbols. "\(" is
impossible to match using `scan-lists'.
--
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>
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: Problems with LaTeX export for $x\text{foo $x$}$-like construts?
2022-12-29 10:04 ` Ihor Radchenko
@ 2022-12-29 10:39 ` Alain.Cochard
2022-12-29 10:44 ` Ihor Radchenko
2022-12-29 11:52 ` Ihor Radchenko
1 sibling, 1 reply; 5+ messages in thread
From: Alain.Cochard @ 2022-12-29 10:39 UTC (permalink / raw)
To: Ihor Radchenko; +Cc: alain.cochard, emacs-orgmode
Ihor Radchenko writes on Thu 29 Dec 2022 10:04:
> This is to be expected because [...]
Thanks for taking the time to explain.
(I don't understand why you quoted the part of my message related to
things which work as expected, though.)
--
EOST (École et Observatoire des Sciences de la Terre)
ITE (Institut Terre & Environnement) | alain.cochard@unistra.fr
5 rue René Descartes [bureau 110] | Phone: +33 (0)3 68 85 50 44
F-67084 Strasbourg Cedex, France | [ slot available for rent ]
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: Problems with LaTeX export for $x\text{foo $x$}$-like construts?
2022-12-29 10:04 ` Ihor Radchenko
2022-12-29 10:39 ` Alain.Cochard
@ 2022-12-29 11:52 ` Ihor Radchenko
1 sibling, 0 replies; 5+ messages in thread
From: Ihor Radchenko @ 2022-12-29 11:52 UTC (permalink / raw)
To: alain.cochard; +Cc: emacs-orgmode
Ihor Radchenko <yantar92@posteo.net> writes:
> Unfortunately, I do not see an easy solution without hitting parser
> performance. Our general approach is to avoid forward-parsing as much as
> possible with an exception to paired brackets (because Elisp allows
> parsing paired brackets fast using C-level code). However, AFAIK, there
> is no easy way to parse brackets that are not single symbols. "\(" is
> impossible to match using `scan-lists'.
One interesting idea to consider is using PEG (third-party ELPA package).
The above examples with paired parenthesis can be parsed using the
following PEG:
(with-peg-rules
((no-paren (not "\\(") (not "\\)") (any))
(no-paren-expr (+ no-paren))
(paren-expr "\\(" (* (or no-paren-expr paren-expr)) "\\)"))
(peg-run (peg paren-expr)))
PEG is not built-in though, so we cannot use it in Org.
--
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>
^ permalink raw reply [flat|nested] 5+ messages in thread
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2022-12-28 13:57 Problems with LaTeX export for $x\text{foo $x$}$-like construts? Alain.Cochard
2022-12-29 10:04 ` Ihor Radchenko
2022-12-29 10:39 ` Alain.Cochard
2022-12-29 10:44 ` Ihor Radchenko
2022-12-29 11:52 ` Ihor Radchenko
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