* bug#65885: Acknowledgement (29.1.50; wrong behaviour of treesit-beginning-of-defun in c++-ts-mode)
[not found] ` <handler.65885.B.169449251427125.ack@debbugs.gnu.org>
@ 2023-09-12 4:41 ` Yang Yingchao via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-09-12 12:27 ` Eli Zaretskii
0 siblings, 1 reply; 6+ messages in thread
From: Yang Yingchao via Bug reports for GNU Emacs, the Swiss army knife of text editors @ 2023-09-12 4:41 UTC (permalink / raw)
To: 65885
[-- Attachment #1: Type: text/plain, Size: 1424 bytes --]
It seams that there is an issue with the behavior of `treesit-beginning-of-defun` function in
`c++-ts-mode` when there are static variables present in the source code. For instance, in the
provided code snippet, if the cursor is initially placed on the line containing `int b`, and the
"C-M-a" is pressed, the cursor is positioned on line 4 instead of line 1 where the beginning of
the function is located.
,----
| void func // c-ts-mode: treesit-beginning-of-defun stops in this line, RIGHT
| {
| char * msg;
| static int a; // c++-ts-mode: treesit-beginning-of-defun stops in this line, WRONG
| int b; // PUT CUSOR HERE
| }
`----
it works in c-ts-mode works normally.
Regards.
On Tue, Sep 12 2023, help-debbugs@gnu.org (GNU bug Tracking System) wrote:
> Thank you for filing a new bug report with debbugs.gnu.org.
>
> This is an automatically generated reply to let you know your message
> has been received.
>
> Your message is being forwarded to the package maintainers and other
> interested parties for their attention; they will reply in due course.
>
> Your message has been sent to the package maintainer(s):
> bug-gnu-emacs@gnu.org
>
> If you wish to submit further information on this problem, please
> send it to 65885@debbugs.gnu.org.
>
> Please do not send mail to help-debbugs@gnu.org unless you wish
> to report a problem with the Bug-tracking system.
Regards,
-- *Yang Yingchao*
^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#65885: Acknowledgement (29.1.50; wrong behaviour of treesit-beginning-of-defun in c++-ts-mode)
2023-09-12 4:41 ` bug#65885: Acknowledgement (29.1.50; wrong behaviour of treesit-beginning-of-defun in c++-ts-mode) Yang Yingchao via Bug reports for GNU Emacs, the Swiss army knife of text editors
@ 2023-09-12 12:27 ` Eli Zaretskii
2023-09-13 0:03 ` Yang Yingchao via Bug reports for GNU Emacs, the Swiss army knife of text editors
[not found] ` <87wmwv9bhu.fsf@qq.com>
0 siblings, 2 replies; 6+ messages in thread
From: Eli Zaretskii @ 2023-09-12 12:27 UTC (permalink / raw)
To: yang.yingchao; +Cc: 65885
> Date: Tue, 12 Sep 2023 12:41:32 +0800
> From: Yang Yingchao via "Bug reports for GNU Emacs,
> the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
>
> It seams that there is an issue with the behavior of `treesit-beginning-of-defun` function in
> `c++-ts-mode` when there are static variables present in the source code. For instance, in the
> provided code snippet, if the cursor is initially placed on the line containing `int b`, and the
> "C-M-a" is pressed, the cursor is positioned on line 4 instead of line 1 where the beginning of
> the function is located.
>
> ,----
> | void func // c-ts-mode: treesit-beginning-of-defun stops in this line, RIGHT
> | {
> | char * msg;
> | static int a; // c++-ts-mode: treesit-beginning-of-defun stops in this line, WRONG
> | int b; // PUT CUSOR HERE
> | }
> `----
>
> it works in c-ts-mode works normally.
If you want c++-ts-mode to work like c-ts-mode, set
treesit-defun-tactic to 'top-level'. By default, we try to support
nested defuns in C++, but not in C.
^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#65885: Acknowledgement (29.1.50; wrong behaviour of treesit-beginning-of-defun in c++-ts-mode)
2023-09-12 12:27 ` Eli Zaretskii
@ 2023-09-13 0:03 ` Yang Yingchao via Bug reports for GNU Emacs, the Swiss army knife of text editors
[not found] ` <87wmwv9bhu.fsf@qq.com>
1 sibling, 0 replies; 6+ messages in thread
From: Yang Yingchao via Bug reports for GNU Emacs, the Swiss army knife of text editors @ 2023-09-13 0:03 UTC (permalink / raw)
To: Eli Zaretskii; +Cc: 65885
[-- Attachment #1: Type: text/plain, Size: 1879 bytes --]
>> Date: Tue, 12 Sep 2023 12:41:32 +0800
>> From: Yang Yingchao via "Bug reports for GNU Emacs,
>> the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
>>
>> It seams that there is an issue with the behavior of `treesit-beginning-of-defun` function in
>> `c++-ts-mode` when there are static variables present in the source code. For instance, in the
>> provided code snippet, if the cursor is initially placed on the line containing `int b`, and the
>> "C-M-a" is pressed, the cursor is positioned on line 4 instead of line 1 where the beginning of
>> the function is located.
>>
>> ,----
>> | void func // c-ts-mode: treesit-beginning-of-defun stops in this line, RIGHT
>> | {
>> | char * msg;
>> | static int a; // c++-ts-mode: treesit-beginning-of-defun stops in this line, WRONG
>> | int b; // PUT CUSOR HERE
>> | }
>> `----
>>
>> it works in c-ts-mode works normally.
>
> If you want c++-ts-mode to work like c-ts-mode, set
> treesit-defun-tactic to 'top-level'. By default, we try to support
> nested defuns in C++, but not in C.
I apologize, but I realized that I have already asked this question before.
However, setting 'treesit-defun-tactic' to 'top-level' could cause other
issues, as seen in the following snippets:
,----
| class Name {
| public:
| Name()
| {
| // cursor here
| }
|
| void func()
| {
| static int a;
| }
|
| };
`----
Suppose the cursor is in line 5, and "C-M-a" is pressed:
- In 'c++-mode', the cursor will be moved to the start of the function 'Name()', which is the expected behavior.
- In 'c++-ts-mode':
- With 'treesit-defun-tactic' set to 'nested', it behaves the same as in 'c++-mode'.
- With 'treesit-defun-tactic' set to 'top-level', the cursor is moved to the beginning of the class, i.e., line 1.
Is it possible to make 'c++-ts-mode' behave the same as in 'c++-mode'?
Regards.
^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#65885: Acknowledgement (29.1.50; wrong behaviour of treesit-beginning-of-defun in c++-ts-mode)
[not found] ` <87wmwv9bhu.fsf@qq.com>
@ 2023-09-13 0:41 ` Yang Yingchao via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-09-13 12:13 ` Eli Zaretskii
0 siblings, 1 reply; 6+ messages in thread
From: Yang Yingchao via Bug reports for GNU Emacs, the Swiss army knife of text editors @ 2023-09-13 0:41 UTC (permalink / raw)
To: Eli Zaretskii, 65885
[-- Attachment #1: Type: text/plain, Size: 2233 bytes --]
>>> Date: Tue, 12 Sep 2023 12:41:32 +0800
>>> From: Yang Yingchao via "Bug reports for GNU Emacs,
>>> the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
>>>
>>> It seams that there is an issue with the behavior of `treesit-beginning-of-defun` function in
>>> `c++-ts-mode` when there are static variables present in the source code. For instance, in the
>>> provided code snippet, if the cursor is initially placed on the line containing `int b`, and the
>>> "C-M-a" is pressed, the cursor is positioned on line 4 instead of line 1 where the beginning of
>>> the function is located.
>>>
>>> ,----
>>> | void func // c-ts-mode: treesit-beginning-of-defun stops in this line, RIGHT
>>> | {
>>> | char * msg;
>>> | static int a; // c++-ts-mode: treesit-beginning-of-defun stops in this line, WRONG
>>> | int b; // PUT CUSOR HERE
>>> | }
>>> `----
>>>
>>> it works in c-ts-mode works normally.
>>
>> If you want c++-ts-mode to work like c-ts-mode, set
>> treesit-defun-tactic to 'top-level'. By default, we try to support
>> nested defuns in C++, but not in C.
>
>
> I apologize, but I realized that I have already asked this question before.
>
> However, setting 'treesit-defun-tactic' to 'top-level' could cause other
> issues, as seen in the following snippets:
>
>
> ,----
> | class Name {
> | public:
> | Name()
> | {
> | // cursor here
> | }
> |
> | void func()
> | {
> | static int a;
> | }
> |
> | };
> `----
>
> Suppose the cursor is in line 5, and "C-M-a" is pressed:
>
> - In 'c++-mode', the cursor will be moved to the start of the function 'Name()', which is the expected behavior.
> - In 'c++-ts-mode':
> - With 'treesit-defun-tactic' set to 'nested', it behaves the same as in 'c++-mode'.
> - With 'treesit-defun-tactic' set to 'top-level', the cursor is moved to the beginning of the class, i.e., line 1.
>
> Is it possible to make 'c++-ts-mode' behave the same as in 'c++-mode'?
>
> Regards.
Maybe I'm wrong, but I would like to suggest reconsidering the solution to the 'begging-of-defun' issue related to the static *variable*. It feels strange to me to fix this issue by changing the 'treesit-defun-tactic', which is meant to apply to a *function* literally...
^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#65885: Acknowledgement (29.1.50; wrong behaviour of treesit-beginning-of-defun in c++-ts-mode)
2023-09-13 0:41 ` Yang Yingchao via Bug reports for GNU Emacs, the Swiss army knife of text editors
@ 2023-09-13 12:13 ` Eli Zaretskii
2023-09-14 0:17 ` Yang Yingchao via Bug reports for GNU Emacs, the Swiss army knife of text editors
0 siblings, 1 reply; 6+ messages in thread
From: Eli Zaretskii @ 2023-09-13 12:13 UTC (permalink / raw)
To: yang.yingchao, Yuan Fu; +Cc: 65885
> From: Yang Yingchao <yang.yingchao@qq.com>
> Date: Wed, 13 Sep 2023 08:41:27 +0800
>
> >>> Date: Tue, 12 Sep 2023 12:41:32 +0800
> >>> From: Yang Yingchao via "Bug reports for GNU Emacs,
> >>> the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> >>>
> >>> It seams that there is an issue with the behavior of `treesit-beginning-of-defun` function in
> >>> `c++-ts-mode` when there are static variables present in the source code. For instance, in the
> >>> provided code snippet, if the cursor is initially placed on the line containing `int b`, and the
> >>> "C-M-a" is pressed, the cursor is positioned on line 4 instead of line 1 where the beginning of
> >>> the function is located.
> >>>
> >>> ,----
> >>> | void func // c-ts-mode: treesit-beginning-of-defun stops in this line, RIGHT
> >>> | {
> >>> | char * msg;
> >>> | static int a; // c++-ts-mode: treesit-beginning-of-defun stops in this line, WRONG
> >>> | int b; // PUT CUSOR HERE
> >>> | }
> >>> `----
> >>>
> >>> it works in c-ts-mode works normally.
> >>
> >> If you want c++-ts-mode to work like c-ts-mode, set
> >> treesit-defun-tactic to 'top-level'. By default, we try to support
> >> nested defuns in C++, but not in C.
> >
> >
> > I apologize, but I realized that I have already asked this question before.
> >
> > However, setting 'treesit-defun-tactic' to 'top-level' could cause other
> > issues, as seen in the following snippets:
> >
> >
> > ,----
> > | class Name {
> > | public:
> > | Name()
> > | {
> > | // cursor here
> > | }
> > |
> > | void func()
> > | {
> > | static int a;
> > | }
> > |
> > | };
> > `----
> >
> > Suppose the cursor is in line 5, and "C-M-a" is pressed:
> >
> > - In 'c++-mode', the cursor will be moved to the start of the function 'Name()', which is the expected behavior.
> > - In 'c++-ts-mode':
> > - With 'treesit-defun-tactic' set to 'nested', it behaves the same as in 'c++-mode'.
> > - With 'treesit-defun-tactic' set to 'top-level', the cursor is moved to the beginning of the class, i.e., line 1.
> >
> > Is it possible to make 'c++-ts-mode' behave the same as in 'c++-mode'?
> >
> > Regards.
>
> Maybe I'm wrong, but I would like to suggest reconsidering the solution to the 'begging-of-defun' issue related to the static *variable*. It feels strange to me to fix this issue by changing the 'treesit-defun-tactic', which is meant to apply to a *function* literally...
Yuan, any ideas or suggestions?
^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#65885: Acknowledgement (29.1.50; wrong behaviour of treesit-beginning-of-defun in c++-ts-mode)
2023-09-13 12:13 ` Eli Zaretskii
@ 2023-09-14 0:17 ` Yang Yingchao via Bug reports for GNU Emacs, the Swiss army knife of text editors
0 siblings, 0 replies; 6+ messages in thread
From: Yang Yingchao via Bug reports for GNU Emacs, the Swiss army knife of text editors @ 2023-09-14 0:17 UTC (permalink / raw)
To: Eli Zaretskii; +Cc: Yuan Fu, 65885
[-- Attachment #1: Type: text/plain, Size: 3510 bytes --]
>> From: Yang Yingchao <yang.yingchao@qq.com>
>> Date: Wed, 13 Sep 2023 08:41:27 +0800
>>
>> >>> Date: Tue, 12 Sep 2023 12:41:32 +0800
>> >>> From: Yang Yingchao via "Bug reports for GNU Emacs,
>> >>> the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
>> >>>
>> >>> It seams that there is an issue with the behavior of `treesit-beginning-of-defun` function in
>> >>> `c++-ts-mode` when there are static variables present in the source code. For instance, in the
>> >>> provided code snippet, if the cursor is initially placed on the line containing `int b`, and the
>> >>> "C-M-a" is pressed, the cursor is positioned on line 4 instead of line 1 where the beginning of
>> >>> the function is located.
>> >>>
>> >>> ,----
>> >>> | void func // c-ts-mode: treesit-beginning-of-defun stops in this line, RIGHT
>> >>> | {
>> >>> | char * msg;
>> >>> | static int a; // c++-ts-mode: treesit-beginning-of-defun stops in this line, WRONG
>> >>> | int b; // PUT CUSOR HERE
>> >>> | }
>> >>> `----
>> >>>
>> >>> it works in c-ts-mode works normally.
>> >>
>> >> If you want c++-ts-mode to work like c-ts-mode, set
>> >> treesit-defun-tactic to 'top-level'. By default, we try to support
>> >> nested defuns in C++, but not in C.
>> >
>> >
>> > I apologize, but I realized that I have already asked this question before.
>> >
>> > However, setting 'treesit-defun-tactic' to 'top-level' could cause other
>> > issues, as seen in the following snippets:
>> >
>> >
>> > ,----
>> > | class Name {
>> > | public:
>> > | Name()
>> > | {
>> > | // cursor here
>> > | }
>> > |
>> > | void func()
>> > | {
>> > | static int a;
>> > | }
>> > |
>> > | };
>> > `----
>> >
>> > Suppose the cursor is in line 5, and "C-M-a" is pressed:
>> >
>> > - In 'c++-mode', the cursor will be moved to the start of the function 'Name()', which is the expected behavior.
>> > - In 'c++-ts-mode':
>> > - With 'treesit-defun-tactic' set to 'nested', it behaves the same as in 'c++-mode'.
>> > - With 'treesit-defun-tactic' set to 'top-level', the cursor is moved to the beginning of
>> > the class, i.e., line 1.
>> >
>> > Is it possible to make 'c++-ts-mode' behave the same as in 'c++-mode'?
>> >
>> > Regards.
>>
>> Maybe I'm wrong, but I would like to suggest reconsidering the solution to the
>> 'begging-of-defun' issue related to the static *variable*. It feels strange to me to fix this
>> issue by changing the 'treesit-defun-tactic', which is meant to apply to a *function*
>> literally...
>
> Yuan, any ideas or suggestions?
Just FYI, I made some modifications to 'treesit--navigate-thing' in my own branch to fix this specific issue:
,----
| 1 file changed, 8 insertions(+)
| lisp/treesit.el | 8 ++++++++
|
| modified lisp/treesit.el
| @@ -2092,6 +2092,14 @@ treesit--navigate-thing
| (pcase-let
| ((`(,prev ,next ,parent)
| (treesit--things-around pos regexp pred)))
| +
| + ;; YYC: Special handling for static variable inside defun...
| + (when (and (equal (treesit-node-type prev)
| + "storage_class_specifier")
| + (equal (treesit-node-type (treesit-node-parent prev))
| + "declaration"))
| + (setq prev nil))
| +
| ;; When PARENT is nil, nested and top-level are the same, if
| ;; there is a PARENT, make PARENT to be the top-level parent
| ;; and pretend there is no nested PREV and NEXT.
|
`----
^ permalink raw reply [flat|nested] 6+ messages in thread
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[not found] ` <handler.65885.B.169449251427125.ack@debbugs.gnu.org>
2023-09-12 4:41 ` bug#65885: Acknowledgement (29.1.50; wrong behaviour of treesit-beginning-of-defun in c++-ts-mode) Yang Yingchao via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-09-12 12:27 ` Eli Zaretskii
2023-09-13 0:03 ` Yang Yingchao via Bug reports for GNU Emacs, the Swiss army knife of text editors
[not found] ` <87wmwv9bhu.fsf@qq.com>
2023-09-13 0:41 ` Yang Yingchao via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-09-13 12:13 ` Eli Zaretskii
2023-09-14 0:17 ` Yang Yingchao via Bug reports for GNU Emacs, the Swiss army knife of text editors
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