From mboxrd@z Thu Jan  1 00:00:00 1970
From: Nicolas Goaziou <n.goaziou@gmail.com>
Subject: Re: Problem with org-entities-user
Date: Mon, 17 Sep 2012 08:41:13 +0200
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References: <m1d31ljs4q.fsf@tsdye.com>
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In-Reply-To: <m1d31ljs4q.fsf@tsdye.com> (Thomas S. Dye's message of "Sun, 16
	Sep 2012 16:32:53 -1000")
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To: "Thomas S. Dye" <tsd@tsdye.com>
Cc: Org-mode <emacs-orgmode@gnu.org>

Hello,

tsd@tsdye.com (Thomas S. Dye) writes:

> I'm probably doing something silly here, but can't figure it out.  Using
> the new LaTeX exporter, and with org-entities-user defined as below,
> this:
>
> \C14 \frac12 \Omacron
>
> exports as:
>
> \C14 \textonehalf{} \=3D{O}
>
> Why isn't my C14 entity being exported correctly?
>
> All the best,
> Tom
>
> Value: (("U234" "\\textsuperscript{234}U" nil "<sup>234</sup>U" "234U" "2=
34U" "234U")
>  ("Th230" "\\textsuperscript{230}Th" nil "<sup>230</sup>Th" "230Th" "230T=
h" "230Th")
>  ("C14" "\\textsuperscript{14}C" nil "" "14C" "14C" "14C")
>  ("Umacron" "\\=3D{U}" nil "&#0362" "U" "U" "=C5=AA")
>  ("Omacron" "\\=3D{O}" nil "&#0332" "O" "O" "=C5=8C")
>  ("Imacron" "\\=3D{I}" nil "&#0298" "I" "I" "=C4=AA")
>  ("Emacron" "\\=3D{E}" nil "&#0274" "E" "E" "=C4=92")
>  ("Amacron" "\\=3D{A}" nil "&#0256" "A" "A" "=C4=80")
>  ("umacron" "\\=3D{u}" nil "&#0363" "u" "u" "=C5=AB")
>  ("omacron" "\\=3D{o}" nil "&#0333" "o" "o" "=C5=8D")
>  ("imacron" "\\=3D{i}" nil "&#0299" "i" "i" "=C4=AB")
>  ("emacron" "\\=3D{e}" nil "&#0275" "e" "e" "=C4=93")
>  ("amacron" "\\=3D{a}" nil "&#0257" "a" "a" "=C4=81")
>  ("space" "\\ " nil " " " " " " " "))

That's because numbers are not allowed in entities, except for a few
exceptions:

  "\\\\\\(there4\\|sup[123]\\|frac[13][24]\\|[a-zA-Z]+\\)\\($\\|{}\\|[^[:al=
pha:]]\\)"

Note that this regexp also matches LaTeX commands.

One seducing idea would be to drop support for such commands (I'm _not_
talking about math environments and snippets, but about commands like
\hfill{} or \bigskip{}). After all, if you want to write raw LaTeX in an
Org buffer, you can always use #+LATEX: or @@latex:...@@ like with any
other back-end. I see no compelling reason to keep this convenience if
it gets in the way.

It would speed-up a bit entities matching, and would allow for a relaxed
regexp (i.e. a regexp built upon already defined entities).


Regards,

--=20
Nicolas Goaziou