From: Stefan Monnier via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
To: Eli Zaretskii <eliz@gnu.org>
Cc: dev@rjt.dev, Yuan Fu <casouri@gmail.com>,
aqua0210@foxmail.com, 59498@debbugs.gnu.org, mardani29@yahoo.es
Subject: bug#59498: 29.0.50; c++-ts-mode get wrong-type-argument error when enabled
Date: Sun, 27 Nov 2022 02:18:06 -0500 [thread overview]
Message-ID: <jwvsfi4hnzi.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <83ilj0rk2y.fsf@gnu.org> (Eli Zaretskii's message of "Sun, 27 Nov 2022 08:24:21 +0200")
>> I added treesit-comment-start/end to help indenting comments. So this is
>> the correct way to use them. The following comment explains why I created
>> new variables:
>>
>> ;; `comment-start' and `comment-end' assume there is only one type of
>> ;; comment, and that the comment spans only one line. So they are not
>> ;; sufficient for our purpose.
>
> ??? This is surprisingly unclean, IMO. For starters, the names of the
> variables are confusing. The need to define two sets of comment-start and
> comment-end regexps is also a nuisance and a source of errors.
>
> How do non-treesit modes handle this issue? Why do the treesit-based modes
> need something special here?
>
> Stefan, any ideas?
`comment-start` and `comment-end` do not describe the set of possible
comment delimiters. They describe the comment delimiters that should be
*inserted* when we do things like `comment-dwim`.
To find/match comment delimiters we have `comment-start-skip` and
`comment-end-skip`. They're not ideal, but they've been good enough so far.
They don't say which comment starter matches which comment-ender (that
was done by the syntax-tables), but tree-sitter should be able to tell
us that when we need it.
It would be nice if we could avoid the need to set/use
`comment-start-skip` and `comment-end-skip` when using tree-sitter.
Maybe we can compute their values from the tree-sitter grammar.
But getting rid of uses of those vars will take a fair bit more work,
I think.
Stefan
next prev parent reply other threads:[~2022-11-27 7:18 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-23 2:24 bug#59498: 29.0.50; c++-ts-mode get wrong-type-argument error when enabled Eason Huang
2022-11-23 8:44 ` Daniel Martín via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-11-23 10:53 ` Eason Huang
2022-11-24 14:39 ` Randy Taylor
2022-11-25 12:56 ` Eason Huang
2022-11-26 11:18 ` Eli Zaretskii
2022-11-26 22:11 ` Yuan Fu
2022-11-27 6:24 ` Eli Zaretskii
2022-11-27 7:18 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors [this message]
2022-11-27 7:24 ` Eli Zaretskii
2022-11-27 22:21 ` Yuan Fu
2022-11-28 0:24 ` Stefan Kangas
2022-12-18 9:57 ` Eli Zaretskii
2022-12-18 22:49 ` Yuan Fu
2022-12-19 13:51 ` Eli Zaretskii
2022-12-20 1:56 ` Yuan Fu
2022-12-20 15:18 ` Eli Zaretskii
2022-12-21 0:37 ` Yuan Fu
2022-11-28 13:59 ` Eason Huang
2022-11-27 22:00 ` Yuan Fu
[not found] <m24juq9zn6.fsf@foxmail.com>
2022-11-30 21:33 ` Yuan Fu
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