From: David Fussner via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
To: Dmitry Gutov <dgutov@yandex.ru>
Cc: 53749@debbugs.gnu.org, Eli Zaretskii <eliz@gnu.org>,
Lars Ingebrigtsen <larsi@gnus.org>,
Stefan Kangas <stefankangas@gmail.com>
Subject: bug#53749: 29.0.50; [PATCH] Xref backend for TeX buffers
Date: Fri, 15 Sep 2023 07:47:29 +0100 [thread overview]
Message-ID: <CADF+Rth0qE5ACbneSQgwOuk0_Zz=D_uFm00M=5A5SNoGEwjYUg@mail.gmail.com> (raw)
In-Reply-To: <891e916e-d05b-b82b-5d3f-148f097d52cc@yandex.ru>
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Thanks Dmitry,
I'll make another stab at a "new" backend, as suggested. I'll have a look
at the escape char thing, too, and see how I feel about dropping it. It
shouldn't take 18 months this time!
Best,
David.
On Fri, 15 Sept 2023, 00:55 Dmitry Gutov, <dgutov@yandex.ru> wrote:
> Hi David,
>
> On 14/09/2023 19:11, David Fussner via Bug reports for GNU Emacs, the
> Swiss army knife of text editors wrote:
>
> > Once again, many thanks for the feedback. I'm still not certain I
> > agree about the risks involved in creating a new "thing" type, as it
> > really only appears in a small number of commands and then only in TeX
> > buffers, and generally I tried to design the code to keep out of the
> > way of anything outside of such buffers, but needless to say you see
> > further and more clearly than I can. I've been reviewing your comments
> > and my code, and have a few ideas and questions about how to go
> > forward. Though I haven't coded it yet, it's possible that the
> > simplest (and least intrusive) approach to follow would do something
> > like this:
>
> I agree that the risks are probably low, and my review stems from the
> general approach that doing global modifications to the environment can
> lead to problems. It might or might not happen in your case. If anything
> happens, though, the same modifications tend to make it harder to
> investigate, e.g. to find where a particular bit of behavior comes from.
> So the more local an implementation of a feature can be, is generally
> the better.
>
> But I'm no maintainer of tex-mode, and whatever choices are made here
> won't have effect outside of TeX, so if somebody wants to disagree with
> me, they're more than welcome to.
>
> > 1. Get rid of the new texsymbol "thing" and just use a buffer-local
> > value of find-tag-default-function and a rather more thoroughly
> > modified syntax table to control what "symbol" means, but _only_ in
> > the context of commands that use find-tag-default-function. I think
> > I'd lose the ability to change the behavior of
> > isearch-forward-thing-at-point and project-find-regexp, as I can't see
> > how to temporarily modify the syntax table there, though perhaps I'm
> > missing something.
>
> I'm suggesting this approach together with defining a "new" backend for
> TeX. Quotes because while it's going to have its own name, it's mostly
> going to perform forwarding to an existing backend (etags).
>
> This should make it practical for you to treat identifiers in
> xref-backend-definitions differently from that in
> xref-backend-references and xref-backend-apropos.
>
> If you define find-tag-default-function, you don't have to change the
> syntax table too: it might be easier to search around with a regexp.
>
> But for the new backend, you can also define the method
> xref-backend-identifier-at-point, where you would invoke the necessary
> bounds-of-thing logic. Then you won't need a change in
> find-tag-default-function.
>
> Either way, though, the major modes will need to set up
> xref-backend-functions instead (with add-hook). This could also be done
> in a minor mode, which you'd enable in any TeX-related major modes that
> you use.
>
> > 2. Simply eliminate the TeX escape character entirely, both from tag
> > names in a TAGS file and from any thing-at-point in a TeX buffer. I
> > think this would eliminate the need to distinguish among the various
> > xref commands in terms of whether they can or can't handle the escape
> > character. It would also eliminate the need for the new user option in
> > etags.c, as there would no longer be any code to cope with the escape
> > character when finding a (thing-at-point 'symbol). This is slightly
> > less powerful than the default I proposed, but there are probably many
> > use cases where it won't matter at all (though it would for my own,
> > possibly eccentric, use case).
>
> I wanted to ask whether including the backslash is important enough (it
> should not matter too much for disambiguation), but I figured it must
> be, otherwise you wouldn't go to all this effort.
>
> If not, it would simplify things a lot, though.
>
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next prev parent reply other threads:[~2023-09-15 6:47 UTC|newest]
Thread overview: 80+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-03 15:09 bug#53749: 29.0.50; [PATCH] Xref backend for TeX buffers David Fussner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-02-21 2:11 ` Dmitry Gutov
2022-02-21 9:48 ` David Fussner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-02-21 17:28 ` David Fussner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-02-21 23:56 ` Dmitry Gutov
2022-02-22 15:19 ` David Fussner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-02-23 2:21 ` Dmitry Gutov
2022-02-23 10:45 ` David Fussner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-02-24 2:23 ` Dmitry Gutov
2022-02-24 13:15 ` David Fussner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-02-21 23:55 ` Dmitry Gutov
2022-09-08 13:25 ` Lars Ingebrigtsen
2022-09-08 13:34 ` David Fussner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-09-08 13:39 ` Lars Ingebrigtsen
2022-09-08 15:50 ` David Fussner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-09-03 9:08 ` Stefan Kangas
2023-09-03 10:03 ` David Fussner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-09-03 10:46 ` Stefan Kangas
2023-09-13 11:10 ` David Fussner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-09-13 13:42 ` Stefan Kangas
2023-09-13 15:23 ` Dmitry Gutov
2023-09-13 17:01 ` David Fussner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-09-13 23:59 ` Dmitry Gutov
2023-09-14 6:10 ` Eli Zaretskii
2023-09-15 18:45 ` Tassilo Horn
2023-09-16 5:53 ` Ikumi Keita
2023-09-17 8:49 ` David Fussner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-04-22 13:06 ` Arash Esbati
2024-04-22 14:56 ` David Fussner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-04-22 16:15 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-04-22 16:37 ` David Fussner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-04-22 17:16 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-04-22 17:25 ` David Fussner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-04-24 0:09 ` Dmitry Gutov
2024-04-24 9:02 ` David Fussner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-04-23 12:04 ` Arash Esbati
2024-04-23 13:21 ` David Fussner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-04-29 14:15 ` David Fussner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-05-02 0:43 ` Dmitry Gutov
2024-05-02 13:32 ` David Fussner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-05-03 13:42 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-05-07 2:27 ` Dmitry Gutov
2024-05-09 3:00 ` Dmitry Gutov
2024-05-09 6:38 ` David Fussner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-05-09 10:49 ` David Fussner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-05-13 20:54 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-05-14 21:24 ` Dmitry Gutov
2024-05-16 18:18 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-05-20 0:21 ` Dmitry Gutov
2024-05-20 2:38 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-05-07 2:06 ` Dmitry Gutov
2024-05-02 6:47 ` Arash Esbati
2024-05-02 13:34 ` David Fussner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-05-03 14:10 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-05-04 8:26 ` David Fussner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-05-04 14:32 ` Arash Esbati
2024-05-04 14:54 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-05-04 21:15 ` Arash Esbati
2024-05-07 13:15 ` David Fussner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-05-15 15:47 ` David Fussner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-05-16 7:53 ` Arash Esbati
2024-05-16 12:56 ` David Fussner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-09-14 16:11 ` David Fussner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-09-14 23:55 ` Dmitry Gutov
2023-09-15 6:47 ` David Fussner via Bug reports for GNU Emacs, the Swiss army knife of text editors [this message]
2023-09-13 19:16 ` Eli Zaretskii
2023-09-13 20:25 ` David Fussner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-09-14 5:14 ` Eli Zaretskii
2022-02-21 12:35 ` Arash Esbati
2022-02-21 14:03 ` David Fussner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-02-25 20:16 ` Augusto Stoffel
2022-02-26 9:29 ` David Fussner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-02-26 10:56 ` Augusto Stoffel
2022-02-27 18:42 ` Arash Esbati
2022-02-28 9:09 ` David Fussner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-02-28 11:54 ` Arash Esbati
2022-02-28 13:11 ` Augusto Stoffel
2022-02-28 19:04 ` Arash Esbati
2022-03-01 8:46 ` David Fussner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-02-28 13:05 ` Augusto Stoffel
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