Re: Problem with org-entities-user

[Nicolas Goaziou <n.goaziou@gmail.com>]

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{} \={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" "234U" "234U")
>  ("Th230" "\\textsuperscript{230}Th" nil "<sup>230</sup>Th" "230Th" "230Th" "230Th")
>  ("C14" "\\textsuperscript{14}C" nil "" "14C" "14C" "14C")
>  ("Umacron" "\\={U}" nil "&#0362" "U" "U" "Ū")
>  ("Omacron" "\\={O}" nil "&#0332" "O" "O" "Ō")
>  ("Imacron" "\\={I}" nil "&#0298" "I" "I" "Ī")
>  ("Emacron" "\\={E}" nil "&#0274" "E" "E" "Ē")
>  ("Amacron" "\\={A}" nil "&#0256" "A" "A" "Ā")
>  ("umacron" "\\={u}" nil "&#0363" "u" "u" "ū")
>  ("omacron" "\\={o}" nil "&#0333" "o" "o" "ō")
>  ("imacron" "\\={i}" nil "&#0299" "i" "i" "ī")
>  ("emacron" "\\={e}" nil "&#0275" "e" "e" "ē")
>  ("amacron" "\\={a}" nil "&#0257" "a" "a" "ā")
>  ("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]+\\)\\($\\|{}\\|[^[:alpha:]]\\)"

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,

-- 
Nicolas Goaziou