From mboxrd@z Thu Jan  1 00:00:00 1970
From: Nicolas Goaziou <mail@nicolasgoaziou.fr>
Subject: Re: Inline LaTeX formulae
Date: Sat, 09 May 2015 10:01:21 +0200
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To: Titus von der Malsburg <malsburg@posteo.de>
Cc: emacs-orgmode@gnu.org

Titus von der Malsburg <malsburg@posteo.de> writes:

> This looks indeed much nicer but it=E2=80=99s not what we want.  The Emacs
> documentation says:
>
>   =E2=80=98[:punct:]=E2=80=99
>     This matches any punctuation character. (At present, for multibyte
>     characters, it matches anything that has non-word syntax.)
>
> If this matches any non-word multibyte character, it also matches things
> like the multiplication sign along with a lot of other non-punctuation
> characters.  So if we=E2=80=99d use [:punct:] we would incorrectly detect=
 a
> latex fragment in the following example:
>
>   50$=3D10$=C3=975

Too bad, then. The current regexp is really ugly.

> Fix detection of latex fragments
>
> * org-element.el (org-element-latex-fragment-parser):
> * org.el (org-latex-regexps): Fix the detection of latex
>   fragments.  Uses syntax tables to detect whitespaces and punctuation
>   marks following the final $ sign.
>
> In order to qualify as a math delimiter, the final $ sign of a LaTeX
> fragment has to be followed by a whitespace or punctuation mark but the
> regexp used in the previous code matched only a small number of
> punctuation marks and therefore missed some latex fragments.

Applied. Thank you.


Regards,