From: Eli Zaretskii <eliz@gnu.org>
To: Mickey Petersen <mickey@masteringemacs.org>
Cc: casouri@gmail.com, 73404@debbugs.gnu.org
Subject: bug#73404: 30.0.50; [forward/kill/etc]-sexp commands do not behave as expected in tree-sitter modes
Date: Thu, 26 Sep 2024 16:46:52 +0300 [thread overview]
Message-ID: <86tte2a5o3.fsf@gnu.org> (raw)
In-Reply-To: <87bk0a1u0o.fsf@masteringemacs.org> (message from Mickey Petersen on Thu, 26 Sep 2024 13:13:53 +0100)
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> From: Mickey Petersen <mickey@masteringemacs.org>
> Cc: casouri@gmail.com, 73404@debbugs.gnu.org
> Date: Thu, 26 Sep 2024 13:13:53 +0100
>
>
> Eli Zaretskii <eliz@gnu.org> writes:
>
> > int foo = bar + 2 * baz;
> >
> > Suppose you start with point at "foo": what would you expect
> > forward-sexp to do? nothing?
> >
>
> I expect it to behave as it presently does: default to word-like
> behaviour such as M-@ / M-f etc.
Then we just lost an opportunity to have more useful commands, because
we already have M-f and M-@.
> Balanced expression is not well defined, de jure, but it is in
> practical terms, making it de facto rather well understood and
> supported. It behaves reasonably consistently across languages, and I
> use *-sexp commands thousands of times a day in a wide range of major modes and
> contexts, both in code and also prose.
I think the ability to move by parse sub-trees is also very useful.
> Most people who use *-sexp (or *-word commands for that matter) in
> major modes come to recognise how they work and know what happens to
> the text/point in their buffer before they run them.
>
> I would challenge anyone, given even small samples of code, to do the
> same with the current TS only implementation.
That's just a matter of getting used to the new semantics.
> > I disagree. Moving by sub-trees is a natural generalization of sexp
> > movement for languages where parentheses and braces are rare and far
> > in-between.
>
> Yes, if one can intuit the sub trees' structure, which is not so
> simple; and if the selection of commands are sufficiently expressive
> enough to let you navigate the tree. I am not sure they are.
There are enough situations where moving by words will also surprise
you. For example, did you know that M-f stops when it finds a
character from a different script? And yet we still use these
commands.
next prev parent reply other threads:[~2024-09-26 13:46 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-21 5:06 bug#73404: 30.0.50; [forward/kill/etc]-sexp commands do not behave as expected in tree-sitter modes Mickey Petersen
2024-09-26 7:42 ` Yuan Fu
2024-09-26 9:56 ` Mickey Petersen
2024-09-26 10:53 ` Eli Zaretskii
2024-09-26 12:13 ` Mickey Petersen
2024-09-26 13:46 ` Eli Zaretskii [this message]
2024-09-26 15:21 ` Mickey Petersen
2024-09-26 15:45 ` Eli Zaretskii
2024-09-27 5:43 ` Yuan Fu
2024-09-29 16:56 ` Juri Linkov
2024-10-01 3:57 ` Yuan Fu
2024-10-01 17:49 ` Juri Linkov
2024-10-02 6:14 ` Yuan Fu
2024-12-05 18:52 ` Juri Linkov
2024-12-05 19:53 ` Juri Linkov
2024-12-10 17:20 ` Juri Linkov
2024-12-11 6:31 ` Yuan Fu
2024-12-11 15:12 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-12-11 15:29 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-12-11 16:50 ` Mickey Petersen
2024-12-11 18:27 ` Yuan Fu
2024-12-12 7:17 ` Juri Linkov
2024-12-12 7:40 ` Eli Zaretskii
2024-12-12 7:58 ` Juri Linkov
2024-12-12 8:14 ` Juri Linkov
2024-12-12 16:31 ` Juri Linkov
2024-12-12 17:49 ` Juri Linkov
2024-12-12 19:13 ` Eli Zaretskii
2024-12-13 7:06 ` Juri Linkov
2024-12-14 11:02 ` Eli Zaretskii
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