I discovered that auctex's texmathp-match-switch does not check whether or not dollar signs are commented out or not, therefore i get wrong results when i all M-x `texmathp' in very specific contexts. So i wanted to redefine the function in a custom library that is loaded automatically as soon as LaTeX-Mode is invoked (by adding the library to the LaTeX-mode-hook). The relevant parts of my code are:

(require 'tex)  
(require 'latex)

(defun texmathp-match-switch (bound)
  "Search backward for any of the math switches.
Limit searched to BOUND."
  ;; The return value is like ("\\(" . (point)).
    (if (and (re-search-backward texmathp-onoff-regexp bound t)
             ;; my addition (and the `and' above):
             (not (TeX-in-commented-line)))
        (cons (buffer-substring-no-properties (match-beginning 1) (match-end 1))
              (match-beginning 1))

Unfortunalety, this naive approach doesn't work.

Whenever I am in a tex file and do M-h 'texmathp-match-switch' it says "texmathp-match-switch is an autoloaded compiled Lisp function in `texmathp.el'.". Ho do I do this the right way?

EDIT: In case, it's relevant: AUCTeX-version is 11.87; emacs-version is 24.3.1. And no, I cannot update either: "Never change a running system".

  • I can't reproduce this, could you provide more details. What I tried was putting your code in a separate file, start a new emacs, load-library on the file with your code, open a latex file, and then requested the help on your function. It still shows the function as autoloaded, but points to the new file for the definition. Nov 17 '18 at 11:37
  • @AndrewSwann The file with my code is loaded via the latex-mode-hook, that is, upon or immediately after starting latex mode, not beforehands. I'm afraid, i cant change that for it would break my and my co-workers' workflow.
    – Lupino
    Nov 18 '18 at 12:37
  • Can you show the code in your hook? Nov 18 '18 at 14:10
  • (add-hook 'LaTeX-mode-hook (lambda () (require 'letex-tex-base "tex-basis.el" nil)) t) The file with this line is loaded within my .emacs file.
    – Lupino
    Nov 19 '18 at 10:36
  • Loading via such a hook also works for me, if I add (provide 'letex-tex-base) in the file of commands. (Should letex be latex?) Nov 19 '18 at 11:10

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