GNU bug report logs - #61374
30.0.50; Wrong mark-sexp with tree-sitter

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Ergus <spacibba <at> aol.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 30.0.50; Wrong mark-sexp with tree-sitter 
Date: Thu, 09 Feb 2023 01:19:52 +0100

Hi:

Just trying tree-sitter with c++-mode is doing a wrong mark-sexp.

With this code:

{
  vector<int> myvar;
}

M-x c++-ts-mode

go to { and do C-M-SPC. The region marked goes from { up to > instead of
the corresponding }


In GNU Emacs 30.0.50 (build 7, x86_64-pc-linux-gnu, GTK+ Version
 3.24.36, cairo version 1.17.6) of 2023-02-09 built on Ergus
Repository revision: 680bc20553ebf01375ab7957b6f0be066335fd6e
Repository branch: master
System Description: Arch Linux

Configured using:
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Message #8 received at 61374 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Ergus <spacibba <at> aol.com>, Yuan Fu <casouri <at> gmail.com>,
 Theodor Thornhill <theo <at> thornhill.no>
Cc: 61374 <at> debbugs.gnu.org
Subject: Re: bug#61374: 30.0.50; Wrong mark-sexp with tree-sitter
Date: Thu, 09 Feb 2023 08:40:27 +0200

> Date: Thu, 09 Feb 2023 01:19:52 +0100
> From:  Ergus via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs <at> gnu.org>
> 
> Just trying tree-sitter with c++-mode is doing a wrong mark-sexp.
> 
> With this code:
> 
> {
>   vector<int> myvar;
> }
> 
> M-x c++-ts-mode
> 
> go to { and do C-M-SPC. The region marked goes from { up to > instead of
> the corresponding }

The problem is in forward-sexp (try C-M-f from the same place), which
C-M-SPC calls.  This problem exists only on master, where forward-sexp
was modified to call treesit-forward-sexp; on emacs-29 the behavior is
as expected.

CC'ing Yuan and Theo, who will probably find a fix in no time...

Thanks.

Message #11 received at 61374 <at> debbugs.gnu.org (full text, mbox):

From: Theodor Thornhill <theo <at> thornhill.no>
To: Eli Zaretskii <eliz <at> gnu.org>, Ergus <spacibba <at> aol.com>,
 Yuan Fu <casouri <at> gmail.com>
Cc: 61374 <at> debbugs.gnu.org
Subject: Re: bug#61374: 30.0.50; Wrong mark-sexp with tree-sitter
Date: Thu, 09 Feb 2023 07:49:22 +0100

On 9 February 2023 07:40:27 CET, Eli Zaretskii <eliz <at> gnu.org> wrote:
>> Date: Thu, 09 Feb 2023 01:19:52 +0100
>> From:  Ergus via "Bug reports for GNU Emacs,
>>  the Swiss army knife of text editors" <bug-gnu-emacs <at> gnu.org>
>> 
>> Just trying tree-sitter with c++-mode is doing a wrong mark-sexp.
>> 
>> With this code:
>> 
>> {
>>   vector<int> myvar;
>> }
>> 
>> M-x c++-ts-mode
>> 
>> go to { and do C-M-SPC. The region marked goes from { up to > instead of
>> the corresponding }
>
>The problem is in forward-sexp (try C-M-f from the same place), which
>C-M-SPC calls.  This problem exists only on master, where forward-sexp
>was modified to call treesit-forward-sexp; on emacs-29 the behavior is
>as expected.
>
>CC'ing Yuan and Theo, who will probably find a fix in no time...
>
>Thanks.

I'll look at it in just a bit :)

Thanks for pinging!

Theo

Message #14 received at 61374 <at> debbugs.gnu.org (full text, mbox):

From: Theodor Thornhill <theo <at> thornhill.no>
To: Eli Zaretskii <eliz <at> gnu.org>, Ergus <spacibba <at> aol.com>, Yuan Fu
 <casouri <at> gmail.com>
Cc: 61374 <at> debbugs.gnu.org
Subject: Re: bug#61374: 30.0.50; Wrong mark-sexp with tree-sitter
Date: Thu, 09 Feb 2023 09:42:43 +0100

Theodor Thornhill <theo <at> thornhill.no> writes:

> On 9 February 2023 07:40:27 CET, Eli Zaretskii <eliz <at> gnu.org> wrote:
>>> Date: Thu, 09 Feb 2023 01:19:52 +0100
>>> From:  Ergus via "Bug reports for GNU Emacs,
>>>  the Swiss army knife of text editors" <bug-gnu-emacs <at> gnu.org>
>>> 
>>> Just trying tree-sitter with c++-mode is doing a wrong mark-sexp.
>>> 
>>> With this code:
>>> 
>>> {
>>>   vector<int> myvar;
>>> }
>>> 
>>> M-x c++-ts-mode
>>> 
>>> go to { and do C-M-SPC. The region marked goes from { up to > instead of
>>> the corresponding }
>>
>>The problem is in forward-sexp (try C-M-f from the same place), which
>>C-M-SPC calls.  This problem exists only on master, where forward-sexp
>>was modified to call treesit-forward-sexp; on emacs-29 the behavior is
>>as expected.
>>
>>CC'ing Yuan and Theo, who will probably find a fix in no time...
>>
>>Thanks.
>
> I'll look at it in just a bit :)
>
> Thanks for pinging!
>
> Theo


I think to remember why I decided on the current settings in
'treesit-sexp-type-regexp' - compound_statement is very frequently used
in the c/c++ grammars, and iirc that makes sexp-moving almost always
move to end of the next or current compound_statement.

try adding

```

  (setq-local treesit-sexp-type-regexp
              (regexp-opt '("preproc"
                            "declarator"
                            "qualifier"
                            "type"
                            "parameter"
                            "expression"
                            "literal"
                            "string"
                            "statement")))
```

and observe that mark-sexp and forward-sexp is ok now wrt this
bug-report, but running same commands inside of a scope may not.  I'm
not sure what the best combination of nodes for this particular regexp
is, but maybe you can give me some expectations, Ergus, and I can follow
up with some new settings?

Theo

Message #17 received at 61374 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Theodor Thornhill <theo <at> thornhill.no>
Cc: 61374 <at> debbugs.gnu.org, spacibba <at> aol.com, casouri <at> gmail.com
Subject: Re: bug#61374: 30.0.50; Wrong mark-sexp with tree-sitter
Date: Thu, 09 Feb 2023 10:54:06 +0200

> From: Theodor Thornhill <theo <at> thornhill.no>
> Cc: 61374 <at> debbugs.gnu.org
> Date: Thu, 09 Feb 2023 09:42:43 +0100
> 
> I think to remember why I decided on the current settings in
> 'treesit-sexp-type-regexp' - compound_statement is very frequently used
> in the c/c++ grammars, and iirc that makes sexp-moving almost always
> move to end of the next or current compound_statement.

Can you show some examples that illustrate these issues?  I'm not sure
I follow your line of reasoning, and thus cannot understand the
relevant considerations and decisions, and their expected effects on
behavior.

Thanks.

Message #20 received at 61374 <at> debbugs.gnu.org (full text, mbox):

From: Theodor Thornhill <theo <at> thornhill.no>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 61374 <at> debbugs.gnu.org, spacibba <at> aol.com, casouri <at> gmail.com
Subject: Re: bug#61374: 30.0.50; Wrong mark-sexp with tree-sitter
Date: Thu, 09 Feb 2023 10:41:52 +0100

Eli Zaretskii <eliz <at> gnu.org> writes:

>> From: Theodor Thornhill <theo <at> thornhill.no>
>> Cc: 61374 <at> debbugs.gnu.org
>> Date: Thu, 09 Feb 2023 09:42:43 +0100
>> 
>> I think to remember why I decided on the current settings in
>> 'treesit-sexp-type-regexp' - compound_statement is very frequently used
>> in the c/c++ grammars, and iirc that makes sexp-moving almost always
>> move to end of the next or current compound_statement.
>
> Can you show some examples that illustrate these issues?  I'm not sure
> I follow your line of reasoning, and thus cannot understand the
> relevant considerations and decisions, and their expected effects on
> behavior.
>
> Thanks.


consider same code as in the first mail:

{
  vector<int> myvar;
}


If point is before the first curly, C-M-f will move to after the semi.


if "compound_statement" is added to the regexps, it will move to after
the closing curly - all good.

Now if point is at the c in 'vector', now we will also move to after the
closing curly, not the first space or after the semi.

This will happen in many places iirc.  I'm not saying it's unfixable,
just that I need to think a little about it, and some expected examples
would be nice.

Did that help?

Theo

Message #23 received at 61374 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Theodor Thornhill <theo <at> thornhill.no>
Cc: 61374 <at> debbugs.gnu.org, spacibba <at> aol.com, casouri <at> gmail.com
Subject: Re: bug#61374: 30.0.50; Wrong mark-sexp with tree-sitter
Date: Thu, 09 Feb 2023 12:52:15 +0200

> From: Theodor Thornhill <theo <at> thornhill.no>
> Cc: spacibba <at> aol.com, casouri <at> gmail.com, 61374 <at> debbugs.gnu.org
> Date: Thu, 09 Feb 2023 10:41:52 +0100
> 
> > Can you show some examples that illustrate these issues?  I'm not sure
> > I follow your line of reasoning, and thus cannot understand the
> > relevant considerations and decisions, and their expected effects on
> > behavior.
> >
> > Thanks.
> 
> 
> consider same code as in the first mail:
> 
> {
>   vector<int> myvar;
> }
> 
> 
> If point is before the first curly, C-M-f will move to after the semi.
> 
> 
> if "compound_statement" is added to the regexps, it will move to after
> the closing curly - all good.
> 
> Now if point is at the c in 'vector', now we will also move to after the
> closing curly, not the first space or after the semi.

Sounds like the treesit sexp movement doesn't have any notion of the
"level" of the sexp or something?  IOW, it doesn't know about the
"innermost" sexp at point?  If so, can we teach treesit.el about that?

Or am I missing the point?

Message #26 received at 61374 <at> debbugs.gnu.org (full text, mbox):

From: Theodor Thornhill <theo <at> thornhill.no>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 61374 <at> debbugs.gnu.org, spacibba <at> aol.com, casouri <at> gmail.com
Subject: Re: bug#61374: 30.0.50; Wrong mark-sexp with tree-sitter
Date: Thu, 09 Feb 2023 12:08:49 +0100

Eli Zaretskii <eliz <at> gnu.org> writes:

>> From: Theodor Thornhill <theo <at> thornhill.no>
>> Cc: spacibba <at> aol.com, casouri <at> gmail.com, 61374 <at> debbugs.gnu.org
>> Date: Thu, 09 Feb 2023 10:41:52 +0100
>> 
>> > Can you show some examples that illustrate these issues?  I'm not sure
>> > I follow your line of reasoning, and thus cannot understand the
>> > relevant considerations and decisions, and their expected effects on
>> > behavior.
>> >
>> > Thanks.
>> 
>> 
>> consider same code as in the first mail:
>> 
>> {
>>   vector<int> myvar;
>> }
>> 
>> 
>> If point is before the first curly, C-M-f will move to after the semi.
>> 
>> 
>> if "compound_statement" is added to the regexps, it will move to after
>> the closing curly - all good.
>> 
>> Now if point is at the c in 'vector', now we will also move to after the
>> closing curly, not the first space or after the semi.
>
> Sounds like the treesit sexp movement doesn't have any notion of the
> "level" of the sexp or something?  IOW, it doesn't know about the
> "innermost" sexp at point?  If so, can we teach treesit.el about that?
>

Yes, I think we should too.  I'll look into it.

> Or am I missing the point?

Nope, don't think so!

Theo

Message #29 received at 61374 <at> debbugs.gnu.org (full text, mbox):

From: Ergus <spacibba <at> aol.com>
To: Theodor Thornhill <theo <at> thornhill.no>
Cc: 61374 <at> debbugs.gnu.org, Eli Zaretskii <eliz <at> gnu.org>, casouri <at> gmail.com
Subject: Re: bug#61374: 30.0.50; Wrong mark-sexp with tree-sitter
Date: Thu, 9 Feb 2023 17:14:03 +0100

On Thu, Feb 09, 2023 at 12:08:49PM +0100, Theodor Thornhill wrote:
>Eli Zaretskii <eliz <at> gnu.org> writes:
>
>>> From: Theodor Thornhill <theo <at> thornhill.no>
>>> Cc: spacibba <at> aol.com, casouri <at> gmail.com, 61374 <at> debbugs.gnu.org
>>> Date: Thu, 09 Feb 2023 10:41:52 +0100
>>>
>>> > Can you show some examples that illustrate these issues?  I'm not sure
>>> > I follow your line of reasoning, and thus cannot understand the
>>> > relevant considerations and decisions, and their expected effects on
>>> > behavior.
>>> >
>>> > Thanks.
>>>
>>>
>>> consider same code as in the first mail:
>>>
>>> {
>>>   vector<int> myvar;
>>> }
>>>
>>>
>>> If point is before the first curly, C-M-f will move to after the semi.
>>>
>>>
>>> if "compound_statement" is added to the regexps, it will move to after
>>> the closing curly - all good.
>>>
>>> Now if point is at the c in 'vector', now we will also move to after the
>>> closing curly, not the first space or after the semi.
>>
>> Sounds like the treesit sexp movement doesn't have any notion of the
>> "level" of the sexp or something?  IOW, it doesn't know about the
>> "innermost" sexp at point?  If so, can we teach treesit.el about that?
>>
>
>Yes, I think we should too.  I'll look into it.
>
Hi:

I am not aware of the details in the treesit.el implementation for
emacs, but the treesit-api already provides the ts_node_start_point and
ts_node_end_point functions which are intended for this use.

Are we relying on that?

>> Or am I missing the point?
>
>Nope, don't think so!
>
>Theo

Message #32 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Juri Linkov <juri <at> linkov.net>
To: Theodor Thornhill via "Bug reports for GNU Emacs, the Swiss army knife
 of text editors" <bug-gnu-emacs <at> gnu.org>
Cc: 61374 <at> debbugs.gnu.org, casouri <at> gmail.com, Eli Zaretskii <eliz <at> gnu.org>,
 Theodor Thornhill <theo <at> thornhill.no>, spacibba <at> aol.com
Subject: Re: bug#61374: 30.0.50; Wrong mark-sexp with tree-sitter
Date: Thu, 09 Feb 2023 19:47:29 +0200

> This will happen in many places iirc.  I'm not saying it's unfixable,
> just that I need to think a little about it, and some expected examples
> would be nice.

Would it be possible to make sexp navigation in c-ts-mode exactly
like it was in c-mode?  It's quite frustrating when after switching
to c-ts-mode sexp commands operate on different things.

Message #38 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Theodor Thornhill <theo <at> thornhill.no>
To: Juri Linkov <juri <at> linkov.net>,
 "Theodor Thornhill via Bug reports for GNU Emacs,
 the Swiss army knife of text editors" <bug-gnu-emacs <at> gnu.org>
Cc: 61374 <at> debbugs.gnu.org, Eli Zaretskii <eliz <at> gnu.org>, casouri <at> gmail.com,
 spacibba <at> aol.com
Subject: Re: bug#61374: 30.0.50; Wrong mark-sexp with tree-sitter
Date: Thu, 09 Feb 2023 20:53:03 +0100

On 9 February 2023 18:47:29 CET, Juri Linkov <juri <at> linkov.net> wrote:
>> This will happen in many places iirc.  I'm not saying it's unfixable,
>> just that I need to think a little about it, and some expected examples
>> would be nice.
>
>Would it be possible to make sexp navigation in c-ts-mode exactly
>like it was in c-mode?  It's quite frustrating when after switching
>to c-ts-mode sexp commands operate on different things.

That should be the goal, yeah :)

Theo

Message #44 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Ergus <spacibba <at> aol.com>
To: Theodor Thornhill <theo <at> thornhill.no>
Cc: 61374 <at> debbugs.gnu.org, "Theodor Thornhill via Bug reports for GNU Emacs,
 the Swiss army knife of text editors" <bug-gnu-emacs <at> gnu.org>,
 casouri <at> gmail.com, Eli Zaretskii <eliz <at> gnu.org>, Juri Linkov <juri <at> linkov.net>
Subject: Re: bug#61374: 30.0.50; Wrong mark-sexp with tree-sitter
Date: Tue, 14 Feb 2023 09:50:49 +0100

Hi:

Sorry to bother. Any progress on this? 

Best,
Ergus

On Thu, Feb 09, 2023 at 08:53:03PM +0100, Theodor Thornhill wrote:
>
>
>On 9 February 2023 18:47:29 CET, Juri Linkov <juri <at> linkov.net> wrote:
>>> This will happen in many places iirc.  I'm not saying it's unfixable,
>>> just that I need to think a little about it, and some expected examples
>>> would be nice.
>>
>>Would it be possible to make sexp navigation in c-ts-mode exactly
>>like it was in c-mode?  It's quite frustrating when after switching
>>to c-ts-mode sexp commands operate on different things.
>
>That should be the goal, yeah :)
>
>Theo

Message #50 received at 61374 <at> debbugs.gnu.org (full text, mbox):

From: Theodor Thornhill <theo <at> thornhill.no>
To: Ergus <spacibba <at> aol.com>
Cc: 61374 <at> debbugs.gnu.org, "Theodor Thornhill via Bug reports for
 GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs <at> gnu.org>,
 casouri <at> gmail.com, Eli Zaretskii <eliz <at> gnu.org>, Juri Linkov <juri <at> linkov.net>
Subject: Re: bug#61374: 30.0.50; Wrong mark-sexp with tree-sitter
Date: Tue, 14 Feb 2023 11:50:56 +0100

Ergus <spacibba <at> aol.com> writes:

> Hi:
>
> Sorry to bother. Any progress on this? 
>

No problem! No, not yet. Will try to look at it tonight. Thanks for
reminding me :)

Theo

Message #56 received at 61374 <at> debbugs.gnu.org (full text, mbox):

From: Ergus <spacibba <at> aol.com>
To: Theodor Thornhill <theo <at> thornhill.no>
Cc: 61374 <at> debbugs.gnu.org
Subject: Re: bug#61374: 30.0.50; Wrong mark-sexp with tree-sitter
Date: Sun, 19 Feb 2023 03:15:42 +0100

Hi Theo:

I know you have multiple bug reports going on (actually some of them are
all my fault ;p indeed) But this one with sexp is a very broken one
IMHO, so I ping again ;).

Did you finally got some time to think on this?

Best,
Ergus



On Tue, Feb 14, 2023 at 11:50:56AM +0100, Theodor Thornhill wrote:
>Ergus <spacibba <at> aol.com> writes:
>
>> Hi:
>>
>> Sorry to bother. Any progress on this?
>>
>
>No problem! No, not yet. Will try to look at it tonight. Thanks for
>reminding me :)
>
>Theo

Message #59 received at 61374 <at> debbugs.gnu.org (full text, mbox):

From: Theodor Thornhill <theo <at> thornhill.no>
To: Ergus <spacibba <at> aol.com>
Cc: 61374 <at> debbugs.gnu.org
Subject: Re: bug#61374: 30.0.50; Wrong mark-sexp with tree-sitter
Date: Sun, 19 Feb 2023 07:22:58 +0100

On 19 February 2023 03:15:42 CET, Ergus <spacibba <at> aol.com> wrote:
>Hi Theo:
>
>I know you have multiple bug reports going on (actually some of them are
>all my fault ;p indeed) But this one with sexp is a very broken one
>IMHO, so I ping again ;).
>
>Did you finally got some time to think on this?
>
>Best,
>Ergus
>
>
>
>On Tue, Feb 14, 2023 at 11:50:56AM +0100, Theodor Thornhill wrote:
>> Ergus <spacibba <at> aol.com> writes:
>> 
>>> Hi:
>>> 
>>> Sorry to bother. Any progress on this?
>>> 
>> 
>> No problem! No, not yet. Will try to look at it tonight. Thanks for
>> reminding me :)
>> 
>> Theo

No worries!

Yeah, I'm working on it, but it seems particularly hard with c for some reason. I haven't prioritized this lately as this code is in master, but the other fixes are on release branch.

I think I have a solution that will make the transition much easier, though. I'll see if I can make a proper attempt this evening.

Sorry :)

Theo 

Message #62 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Ergus <spacibba <at> aol.com>
To: Theodor Thornhill <theo <at> thornhill.no>
Cc: 61374 <at> debbugs.gnu.org, "Theodor Thornhill via Bug reports for GNU Emacs,
 the Swiss army knife of text editors" <bug-gnu-emacs <at> gnu.org>,
 casouri <at> gmail.com, Eli Zaretskii <eliz <at> gnu.org>, Juri Linkov <juri <at> linkov.net>
Subject: Re: bug#61374: 30.0.50; Wrong mark-sexp with tree-sitter
Date: Mon, 20 Mar 2023 21:19:04 +0100

Hi Theodor:

Just to remind... no progress on this yet?

Sorry to bother,
Ergus

On Tue, Feb 14, 2023 at 11:50:56AM +0100, Theodor Thornhill wrote:
>Ergus <spacibba <at> aol.com> writes:
>
>> Hi:
>>
>> Sorry to bother. Any progress on this?
>>
>
>No problem! No, not yet. Will try to look at it tonight. Thanks for
>reminding me :)
>
>Theo

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