GNU bug report logs - #53749
29.0.50; [PATCH] Xref backend for TeX buffers

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Message #221 received at 53749 <at> debbugs.gnu.org (full text, mbox):

From: Arash Esbati <arash <at> gnu.org>
To: Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: 53749 <at> debbugs.gnu.org, Ikumi Keita <ikumi <at> ikumi.que.jp>,
 Dmitry Gutov <dgutov <at> yandex.ru>, David Fussner <dfussner <at> googlemail.com>,
 stefankangas <at> gmail.com, Tassilo Horn <tsdh <at> gnu.org>,
 Eli Zaretskii <eliz <at> gnu.org>
Subject: Re: bug#53749: 29.0.50; [PATCH] Xref backend for TeX buffers
Date: Sat, 04 May 2024 23:15:55 +0200

Stefan Monnier <monnier <at> iro.umontreal.ca> writes:

> But that is *also* valid LaTeX, with a different meaning (i.e. where
> `_` has its subscript meaning).  So we need some other info in order to
> know which of the two we're dealing with.

That's true.  AFAIK, one has to deal with:

  • \_ in ordinary text like foo\_bar
  • _ in math mode like $a_b$
  • expl3 macros like \tl_set:Nn
  • expl3 macros like \__kernel_kern:n

> Maybe that info is simply "assume LaTeX3 if the _ is followed by several
> letters" or some such heuristic, but the comment should say so.

Last time I looked at this, my conclusion was: Deal with \_ and _ in
usual .tex files and expect expl3 macros in .dtx file only.

Best, Arash

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