From: Stephen Leake <stephen_leake@stephe-leake.org>
To: Alan Mackenzie <acm@muc.de>
Cc: Yuan Fu <casouri@gmail.com>, Eli Zaretskii <eliz@gnu.org>,
theodor thornhill <theo@thornhill.no>,
geza.herman@gmail.com, Daniel Colascione <dancol@dancol.org>,
emacs-devel@gnu.org
Subject: parser error recovery algorithm vs treesit indentation "blinking"
Date: Mon, 03 Apr 2023 14:47:29 -0700 [thread overview]
Message-ID: <868rf8vdse.fsf_-_@stephe-leake.org> (raw)
In-Reply-To: <ZCmQfK3cmKT9f6WK@ACM> (Alan Mackenzie's message of "Sun, 2 Apr 2023 14:26:04 +0000")
Alan Mackenzie <acm@muc.de> writes:
> Does the <tree-sitter> parser not produce adequate information for source code which
> isn't syntactically valid (which is most of the time when editing is in
> progress)?
It often does, but also often does not. The error recovery algorithm in
tree-sitter is apparently not good enough for this use case (indentation
with a missing close block symbol). That's because the tree-sitter
algorithm does not insert symbols, it only skips them.
The error recovery algorithm in the wisitoken parser used by ada-mode
does work well in this case; it inserts the missing close block symbol
(and in general inserts other missing symbols).
It would be interesting to convert the C++ grammar used by tree-sitter
to a wisitoken grammar, and see how well that works. I don't have time
or energy for that, but I could support someone else doing it.
I am currently working on using tree-sitter as an ada-mode backend
parser, so we will be able to compare the two parser's indent behavior
using Ada test cases.
--
-- Stephe
next prev parent reply other threads:[~2023-04-03 21:47 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-22 20:49 treesit indentation "blinking" Daniel Colascione
2023-03-23 0:00 ` Yuan Fu
2023-03-23 0:07 ` Daniel Colascione
2023-03-23 1:02 ` Yuan Fu
2023-03-23 4:51 ` Daniel Colascione
2023-03-23 20:04 ` Yuan Fu
2023-03-23 21:10 ` Daniel Colascione
2023-03-23 21:24 ` Dmitry Gutov
2023-03-25 9:05 ` João Távora
2023-03-25 12:42 ` Dmitry Gutov
2023-03-25 14:42 ` Eli Zaretskii
2023-03-25 16:18 ` João Távora
2023-03-28 22:11 ` João Távora
2023-03-28 23:57 ` Daniel Colascione
2023-03-29 2:26 ` Eli Zaretskii
2023-03-29 22:30 ` João Távora
2023-03-29 22:37 ` Herman, Géza
2023-03-29 23:25 ` João Távora
2023-03-30 7:47 ` Herman, Géza
2023-03-29 22:56 ` Lynn Winebarger
2023-03-30 7:43 ` Eli Zaretskii
2023-03-30 8:58 ` Dmitry Gutov
2023-03-30 9:15 ` João Távora
2023-03-30 9:06 ` João Távora
2023-03-30 9:20 ` Dmitry Gutov
2023-03-30 9:28 ` João Távora
2023-03-30 9:36 ` Dmitry Gutov
2023-03-30 10:00 ` João Távora
2023-03-30 16:29 ` Dmitry Gutov
2023-03-30 17:14 ` João Távora
2023-03-30 10:07 ` Eli Zaretskii
2023-03-30 10:26 ` Herman, Géza
2023-03-30 13:39 ` Eli Zaretskii
2023-03-30 15:03 ` Herman, Géza
2023-03-30 14:58 ` Eli Zaretskii
2023-04-01 19:39 ` Yuan Fu
2023-04-02 1:49 ` Yuan Fu
2023-04-02 5:31 ` Eli Zaretskii
2023-04-02 14:26 ` Alan Mackenzie
2023-04-02 15:48 ` João Távora
2023-04-02 17:04 ` Alan Mackenzie
2023-04-02 17:23 ` João Távora
2023-04-02 17:51 ` Eli Zaretskii
2023-04-02 18:04 ` João Távora
2023-04-02 18:14 ` Eli Zaretskii
2023-04-02 21:38 ` João Távora
2023-04-02 21:21 ` Dmitry Gutov
2023-04-02 21:40 ` João Távora
2023-04-03 9:59 ` Alan Mackenzie
2023-04-03 10:28 ` João Távora
2023-04-03 12:07 ` Dmitry Gutov
2023-04-03 12:56 ` Alan Mackenzie
2023-04-03 20:58 ` Dmitry Gutov
2023-04-03 21:59 ` Daniel Colascione
2023-04-03 22:10 ` Dmitry Gutov
2023-04-04 8:31 ` João Távora
2023-04-07 14:20 ` Daniel Martín
2023-04-08 1:32 ` Dmitry Gutov
2023-04-08 2:42 ` Yuan Fu
2023-04-08 18:59 ` Daniel Martín
2023-04-03 21:47 ` Stephen Leake [this message]
2023-04-04 12:01 ` parser error recovery algorithm vs " John Yates
2023-04-04 13:40 ` Dmitry Gutov
2023-04-04 16:00 ` Stephen Leake
2023-04-04 13:50 ` Stephen Leake
2023-04-04 14:05 ` Dmitry Gutov
2023-03-30 11:05 ` João Távora
2023-03-30 14:00 ` Eli Zaretskii
2023-03-30 14:43 ` João Távora
2023-03-30 14:52 ` Eli Zaretskii
2023-03-30 15:42 ` João Távora
2023-03-25 16:14 ` João Távora
2023-03-24 11:39 ` Eli Zaretskii
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
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=868rf8vdse.fsf_-_@stephe-leake.org \
--to=stephen_leake@stephe-leake.org \
--cc=acm@muc.de \
--cc=casouri@gmail.com \
--cc=dancol@dancol.org \
--cc=eliz@gnu.org \
--cc=emacs-devel@gnu.org \
--cc=geza.herman@gmail.com \
--cc=theo@thornhill.no \
/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 external index
https://git.savannah.gnu.org/cgit/emacs.git
https://git.savannah.gnu.org/cgit/emacs/org-mode.git
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.