From: Stefan Monnier <monnier@iro.umontreal.ca>
To: emacs-devel@gnu.org
Subject: Re: Bug #25608 and the comment-cache branch
Date: Thu, 23 Feb 2017 09:48:03 -0500 [thread overview]
Message-ID: <jwvr32pgei1.fsf-monnier+gmane.emacs.devel@gnu.org> (raw)
In-Reply-To: 9f4ac18b-6453-bee8-83d8-f452392adbb9@yandex.ru
> Naturally, we'd need to save more information to be able to do
> that. E.g. propertize the end of a complex comment with the position of its
> beginning. Since the first time we go through a buffer is in the forward
> direction, getting that info would be inexpensive.
Actually, back_comment may very well parse backward "the first time",
since it doesn't use any cache (currently).
>> Maybe. Obviously, my syntax-ppss hammer makes me think that such
>> alternate solutions aren't needed: syntax-ppss solves this case without
>> having to try and come out with a clever way to detect which comments
>> are tricky nor how to mark them.
> The alternative tweak I had in mind would be applied somewhere around
> syntax-propertize.
But you still have to decide what info to save and when. I.e. there's
a design problem, with non-trivial tradeoffs.
Using syntax-ppss saves me the trouble.
> Another thing to consider is that we would probably want to fontify the
> contents of all subregions normally, even when inside comments belonging to
> the outer mode. So the primitives used in
> font-lock-fontify-syntactically-region would need to be able to stop at
> those boundaries instead of automatically skipping over.
That's right.
> Just having those hooks won't be enough, we still don't have enough info how
> to syntax-propertize the subregion contents, for instance. So I'm not sure
> what the flexibility of using the functions here would buy us.
Me neither.
Maybe the real issue is that starting from syntax-table +
syntax-propertize + font-lock is a losing proposition, and instead we
should first come up with a completely different design (from scratch)
that would be able to parse and highlight code and to accommodate
multiple major modes. Then we can maybe see if there's a way to evolve
the current design of syntax-table + syntax-propertize + font-lock to
that new design.
Stefan
next prev parent reply other threads:[~2017-02-23 14:48 UTC|newest]
Thread overview: 75+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-02 20:24 Bug #25608 and the comment-cache branch Alan Mackenzie
2017-02-02 20:47 ` Eli Zaretskii
2017-02-02 21:51 ` Alan Mackenzie
2017-02-02 22:15 ` Dmitry Gutov
2017-02-03 7:41 ` Eli Zaretskii
2017-02-03 17:29 ` Alan Mackenzie
2017-02-03 22:08 ` Dmitry Gutov
2017-02-04 10:24 ` Alan Mackenzie
2017-02-06 2:09 ` Dmitry Gutov
2017-02-06 19:24 ` Alan Mackenzie
2017-02-07 1:42 ` Dmitry Gutov
2017-02-07 19:21 ` Alan Mackenzie
2017-02-14 15:28 ` Dmitry Gutov
2017-02-14 16:38 ` Stefan Monnier
2017-02-22 2:25 ` Dmitry Gutov
2017-02-22 3:53 ` Stefan Monnier
2017-02-23 14:23 ` Dmitry Gutov
2017-02-23 14:48 ` Stefan Monnier [this message]
2017-02-24 7:46 ` Tom Tromey
2017-02-14 21:14 ` Alan Mackenzie
2017-02-16 14:10 ` Stefan Monnier
2017-02-18 10:44 ` Alan Mackenzie
2017-02-18 13:49 ` Stefan Monnier
2017-02-12 2:53 ` John Wiegley
2017-02-12 8:20 ` Elias Mårtenson
2017-02-12 10:47 ` Alan Mackenzie
2017-02-12 11:14 ` martin rudalics
2017-02-12 15:05 ` Andreas Röhler
2017-02-12 15:39 ` Eli Zaretskii
2017-02-05 22:00 ` Alan Mackenzie
2017-02-06 1:12 ` Stefan Monnier
2017-02-06 18:37 ` Alan Mackenzie
2017-02-08 17:20 ` Eli Zaretskii
2017-02-11 23:25 ` Alan Mackenzie
2017-02-12 0:55 ` Stefan Monnier
2017-02-12 12:05 ` Alan Mackenzie
2017-02-12 13:13 ` Juanma Barranquero
2017-02-12 15:57 ` Dmitry Gutov
2017-02-12 17:29 ` Alan Mackenzie
2017-02-12 20:35 ` Dmitry Gutov
2017-02-13 1:47 ` zhanghj
2017-02-13 5:50 ` Stefan Monnier
2017-02-13 6:45 ` zhanghj
2017-02-13 7:24 ` Stefan Monnier
2017-02-13 7:59 ` zhanghj
2017-02-13 9:25 ` Stefan Monnier
2017-02-13 16:14 ` Drew Adams
2017-02-13 7:05 ` zhanghj
2017-02-13 7:16 ` zhanghj
2017-02-13 14:57 ` Dmitry Gutov
2017-02-12 17:49 ` Stefan Monnier
2017-02-13 18:09 ` Alan Mackenzie
2017-02-13 19:34 ` Eli Zaretskii
2017-02-13 21:21 ` Stefan Monnier
2017-02-02 22:14 ` Dmitry Gutov
2017-02-03 16:44 ` Alan Mackenzie
2017-02-03 21:53 ` Dmitry Gutov
2017-02-04 11:02 ` Alan Mackenzie
2017-02-06 1:28 ` Dmitry Gutov
2017-02-06 19:37 ` Alan Mackenzie
2017-02-06 2:08 ` Stefan Monnier
2017-02-06 20:01 ` Alan Mackenzie
2017-02-06 22:33 ` Stefan Monnier
2017-02-07 21:24 ` Alan Mackenzie
2017-02-08 12:54 ` Stefan Monnier
2017-02-07 15:29 ` Eli Zaretskii
2017-02-07 21:09 ` Alan Mackenzie
2017-02-08 17:28 ` Eli Zaretskii
2017-02-02 23:57 ` Stefan Monnier
2017-02-03 16:19 ` Alan Mackenzie
2017-02-04 9:06 ` Andreas Röhler
2017-02-04 18:18 ` Stefan Monnier
2017-02-04 18:28 ` Alan Mackenzie
2017-02-03 7:49 ` Yuri Khan
2017-02-03 18:30 ` Andreas Röhler
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
List information: https://www.gnu.org/software/emacs/
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=jwvr32pgei1.fsf-monnier+gmane.emacs.devel@gnu.org \
--to=monnier@iro.umontreal.ca \
--cc=emacs-devel@gnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this public inbox
https://git.savannah.gnu.org/cgit/emacs.git
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).