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

[David Fussner]

Hi Dmitry,

Thanks for the feedback!

> These won't be affected either way, right? Because project-find-regexp
> defaults its input to (thing-at-point 'symbol t), and isearch...
> probably also uses "symbol" if you ask it to.
>
> So... why not just make tex-thingatpt-include-escape a boolean? What
> commands need to be distinguished that way? I think 'find-tag' (it's
> obsolete but still used sometimes) would need to obey this var as well.

xref-find-apropos and xref-find-references don't work well (or at all)
with the escape char included in the search string, so I was keeping
that char away from them. (The buffer-local variables I manipulate for
project-find-regexp and isearch-forward-thing-at-point have to do with
ensuring they use the texsymbol thing in the first place -- see
tex--symbol-or-texsymbol.) Does that make sense?

I'll look at find-tag, too; thanks for pointing that out.

> Why not set the variable find-tag-default-function instead? That seems
> easier and more appropriate to do inside a major mode function.

I settled on putting the symbol on the modes because I thought it was
simpler than setting the variable buffer-locally in all the in-tree
and AUCTeX modes, but I'll revisit this and see whether I can come up
with something better.

Thanks again.

On Wed, 13 Sept 2023 at 16:23, Dmitry Gutov <dgutov@yandex.ru> wrote:
>
> Hi David!
>
> Thanks for the new patch.
>
> I'm skipping over the etags parser changes (others might comment, I'm
> just assuming they are good).
>
> And "thing at point" code is, I think, at your discretion (if the result
> is useful, then that seems good). I would probably not call the function
> the same way given that we don't install this "thing" globally, just
> using it from several the major modes in a particular way. Anyway, that
> is a minor affair.
>
> I'd like to suggest two simplifications for the xref-related stuff, if
> those work for you.r along the lines of your
>
> On 13/09/2023 14:10, David Fussner via Bug reports for GNU Emacs, the
> Swiss army knife of text editors wrote:
>
> > <...> 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.
>
> These won't be affected either way, right? Because project-find-regexp
> defaults its input to (thing-at-point 'symbol t), and isearch...
> probably also uses "symbol" if you ask it to.
>
> So... why not just make tex-thingatpt-include-escape a boolean? What
> commands need to be distinguished that way? I think 'find-tag' (it's
> obsolete but still used sometimes) would need to obey this var as well.
>
> And the second thing: you're putting the symbol on major modes.
>
> +(dolist (texmode tex-thingatpt-modes-list)
> +  (put texmode 'find-tag-default-function 'tex--thing-at-point))
>
> Why not set the variable find-tag-default-function instead? That seems
> easier and more appropriate to do inside a major mode function.r along the 
> lines of your
>
> Thanks.