Re: Inserting LaTex expressions using a filter fails

[Nick Dokos]

Mart van de Wege <mvdwege@gmail.com> writes:

> I'm trying to replace U+00BD in an org buffer with \sfrac{1}{2} during
> export to LaTex, and obviously I'm doing something wrong, or I don't
> understand the documentation.
>
> I use the following code to set up the filter:
>
> #+BIND: org-export-filter-item-functions (latex-replace-half)
> #+BEGIN_SRC emacs-lisp :exports results :results none
>
>   (defun latex-replace-half (text backend info)
>     (when (org-export-derived-backend-p backend 'latex)
>       (replace-regexp-in-string  "½" "\\sfrac{1}{2}" text)))
> #+END_SRC
>

Try

        (replace-regexp-in-string  "½" "\\\\sfrac{1}{2}" text)))


> Down the line in the document there is this example line:
>
>    - 1½ eetl. gehakte peterselie, ½ eetl. azijn, 4 eetl. olie
>
> Or this one:
>
>    Laat de gewassen en gebroken vermicelli met de foelie ½ uur in de
>
> But neither of them get replaced. I tried plain-text, item, and
> final-output filters.
>

"item" will only deal with the first one: an item in a list. You'll need
to use "final-output" probably.

> What am I missing?
>
> Mart

-- 
Nick

"There are only two hard problems in computer science: cache
invalidation, naming things, and off-by-one errors." -Martin Fowler