bug#53749: 29.0.50; [PATCH] Xref backend for TeX buffers

[David Fussner]

Hi Dmitry,

I've belatedly found some time to get the xref commands working better
in TeX buffers, this time using the default etags backend, as you
requested last year.  The basic strategy remains the same -- create a
new thing-at-point argument "texsymbol" which replaces "symbol" in a
definable set of major modes, then pass the resulting search term to
xref.  Changes in etags.c ensure that the various TeX modes and the
tags tables are cooperating with each other, and I added a new option
to etags (--tex-alt-forms) to handle some of the complexities of the
TeX escape character (as you suggested).  I also manipulate some
variables buffer-locally to make things like project-find-regexp and
isearch-forward-thing-at-point work better in such buffers.

I attach a patch against current master. There is another patch which
contains changes to the test suite in test/manual/etags, but I'll
leave that one in case the changes I've made to etags.c need further
work.

I've sent patches to AUCTeX trying to fix a couple of issues there
with xref-find-references. There's more work to be done on related
issues in tex-mode.el, too, but this patch is a start.

Thanks,

David.

P.S. I'm also starting the copyright assignment process, in case these
changes prove acceptable.

On Sun, 3 Sept 2023 at 11:46, Stefan Kangas <stefankangas@gmail.com> wrote:
>
> David Fussner <dfussner@googlemail.com> writes:
>
> > Thanks for the nudge. I do in fact have a patch that I'm just about finding
> > time to test, so I'll try to get it to the list within a week or two.
>
> Sounds good, and thank you.

0001-Fix-behavior-of-xref-commands-in-TeX-buffers.patch
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