GNU bug report logs - #75883
29.4; csharp-ts-mode missing indent rules for using statement and lambda

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

From: dino chiesa <dpchiesa <at> hotmail.com>
To: "bug-gnu-emacs <at> gnu.org" <bug-gnu-emacs <at> gnu.org>
Subject: 29.4; csharp-ts-mode missing indent rules for using statement and
 lambda
Date: Sun, 26 Jan 2025 23:32:09 +0000

[Message part 1 (text/plain, inline)]

In csharp-ts-mode, the variable csharp-ts-mode--indent-rules holds the
indent rules relevant to csharp that get set into
treesit-simple-indent-rules.

In the csharp-ts-mode--indent-rules list, there is no rule handles using
statements, nor is there one for lambda expressions. The result is, when
I am editing a C# module with something like this:

    using (ZipFile zip = new ZipFile())
 {
         ...
        }


... and press TAB on the line with the open curly, nothing happens. I
would expect it to properly indent the curly, resulting in:

    using (ZipFile zip = new ZipFile())
    {
         ...
        }


The TAB properly invokes indent-for-tab-command, which cascades, via
indent-line-function, to treesit-indent. But it does nothing.

Similarly, if my code uses a lambda to set an Action type, like so:

    Action<Int64> createProgress = (x) =>
 {
        ...
  };


...pressing TAB on the line with the open curly does nothing. I would
expect it to properly indent the open curly.

My diagnosis is: there is no rule to handle the using
statement, nor is there a rule for the lambda_expression in csharp-ts-mode--indent-rules. As
a result, in either case, the open curly does not get properly indented.

If I modify csharp-ts-mode--indent-rules to include rules for these
syntax elements, like so:

  ((parent-is "using_statement") parent-bol 0)
  ((parent-is "lambda_expression") parent-bol 0)

...then a TAB will properly indent the open curlies in these situations.

This is how I monkey-patched it in my own init file:

  (eval-after-load "csharp-mode"
    '(progn
       (setf (cdr (car csharp-ts-mode--indent-rules))
             (cons
              '((parent-is "using_statement") parent-bol 0)
              (cdr (car csharp-ts-mode--indent-rules))))
       (setf (cdr (car csharp-ts-mode--indent-rules))
             (cons
              '((parent-is "lambda_expression") parent-bol 0)
              (cdr (car csharp-ts-mode--indent-rules))))
       (setq-local treesit-simple-indent-rules csharp-ts-mode--indent-rules)
  ))


After doing this, when I press TAB on the line with the open curlies in
the above situations, the open curly is properly indented.


In GNU Emacs 29.4 (build 2, x86_64-w64-mingw32) of 2024-07-05 built on
 AVALON
Windowing system distributor 'Microsoft Corp.', version 10.0.26100
System Description: Microsoft Windows 10 Home (v10.0.2009.26100.2894)

Configured using:
 'configure --with-modules --without-dbus --with-native-compilation=aot
 --without-compress-install --with-sqlite3 --with-tree-sitter
 CFLAGS=-O2'

Configured features:
ACL GIF GMP GNUTLS HARFBUZZ JPEG JSON LCMS2 LIBXML2 MODULES NATIVE_COMP
NOTIFY W32NOTIFY PDUMPER PNG RSVG SOUND SQLITE3 THREADS TIFF
TOOLKIT_SCROLL_BARS TREE_SITTER WEBP XPM ZLIB

(NATIVE_COMP present but libgccjit not available)

Important settings:
  value of $LANG: ENU
  locale-coding-system: cp1252

Major mode: ELisp/d

Minor modes in effect:
  display-line-numbers-mode: t
  global-hl-line-mode: t
  hl-line-mode: t
  recentf-mode: t
  auto-insert-mode: t
  global-auto-complete-mode: t
  auto-complete-mode: t
  yas-global-mode: t
  yas-minor-mode: t
  global-git-commit-mode: t
  magit-auto-revert-mode: t
  auto-revert-mode: t
  shell-dirtrack-mode: t
  server-mode: t
  icomplete-vertical-mode: t
  icomplete-mode: t
  override-global-mode: t
  default-text-scale-mode: t
  indent-bars-mode: t
  tooltip-mode: t
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  transient-mark-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t

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native-compile emacs)

Memory information:
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[Message part 2 (text/html, inline)]

Message #8 received at 75883 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: dino chiesa <dpchiesa <at> hotmail.com>,
 Jostein Kjønigsen <jostein <at> kjonigsen.net>
 Yuan Fu <casouri <at> gmail.com>
Cc: 75883 <at> debbugs.gnu.org
Subject: Re: bug#75883: 29.4;
 csharp-ts-mode missing indent rules for using statement and lambda
Date: Mon, 27 Jan 2025 14:24:52 +0200

> From: dino chiesa <dpchiesa <at> hotmail.com>
> Date: Sun, 26 Jan 2025 23:32:09 +0000
> 
> In csharp-ts-mode, the variable csharp-ts-mode--indent-rules holds the
> indent rules relevant to csharp that get set into
> treesit-simple-indent-rules.
> 
> In the csharp-ts-mode--indent-rules list, there is no rule handles using
> statements, nor is there one for lambda expressions. The result is, when
> I am editing a C# module with something like this:
> 
>     using (ZipFile zip = new ZipFile())
>  {
>          ...
>         }
> 
> ... and press TAB on the line with the open curly, nothing happens. I
> would expect it to properly indent the curly, resulting in:
> 
>     using (ZipFile zip = new ZipFile())
>     {
>          ...
>         }
> 
> The TAB properly invokes indent-for-tab-command, which cascades, via
> indent-line-function, to treesit-indent. But it does nothing.
> 
> Similarly, if my code uses a lambda to set an Action type, like so:
> 
>     Action<Int64> createProgress = (x) =>
>  {
>         ...
>   };
> 
> ...pressing TAB on the line with the open curly does nothing. I would
> expect it to properly indent the open curly.
> 
> My diagnosis is: there is no rule to handle the using
> statement, nor is there a rule for the lambda_expression in csharp-ts-mode--indent-rules. As
> a result, in either case, the open curly does not get properly indented.
> 
> If I modify csharp-ts-mode--indent-rules to include rules for these
> syntax elements, like so:
> 
>   ((parent-is "using_statement") parent-bol 0)
>   ((parent-is "lambda_expression") parent-bol 0)
> 
> ...then a TAB will properly indent the open curlies in these situations.
> 
> This is how I monkey-patched it in my own init file:
> 
>   (eval-after-load "csharp-mode"
>     '(progn
>        (setf (cdr (car csharp-ts-mode--indent-rules))
>              (cons
>               '((parent-is "using_statement") parent-bol 0)
>               (cdr (car csharp-ts-mode--indent-rules))))
>        (setf (cdr (car csharp-ts-mode--indent-rules))
>              (cons
>               '((parent-is "lambda_expression") parent-bol 0)
>               (cdr (car csharp-ts-mode--indent-rules))))
>        (setq-local treesit-simple-indent-rules csharp-ts-mode--indent-rules)
>   ))
> 
> After doing this, when I press TAB on the line with the open curlies in
> the above situations, the open curly is properly indented.

Jostein and Yuan, could you please look into this?

Message #11 received at 75883 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Jostein Kjønigsen <jostein <at> kjonigsen.net>,
 Yuan Fu <casouri <at> gmail.com>
Cc: 75883 <at> debbugs.gnu.org, dpchiesa <at> hotmail.com
Subject: Re: bug#75883: 29.4;
 csharp-ts-mode missing indent rules for using statement and lambda
Date: Sat, 08 Feb 2025 11:35:03 +0200

Ping!  Yuan and Jostein, could you please look into this?

> Cc: 75883 <at> debbugs.gnu.org
> Date: Mon, 27 Jan 2025 14:24:52 +0200
> From: Eli Zaretskii <eliz <at> gnu.org>
> 
> > From: dino chiesa <dpchiesa <at> hotmail.com>
> > Date: Sun, 26 Jan 2025 23:32:09 +0000
> > 
> > In csharp-ts-mode, the variable csharp-ts-mode--indent-rules holds the
> > indent rules relevant to csharp that get set into
> > treesit-simple-indent-rules.
> > 
> > In the csharp-ts-mode--indent-rules list, there is no rule handles using
> > statements, nor is there one for lambda expressions. The result is, when
> > I am editing a C# module with something like this:
> > 
> >     using (ZipFile zip = new ZipFile())
> >  {
> >          ...
> >         }
> > 
> > ... and press TAB on the line with the open curly, nothing happens. I
> > would expect it to properly indent the curly, resulting in:
> > 
> >     using (ZipFile zip = new ZipFile())
> >     {
> >          ...
> >         }
> > 
> > The TAB properly invokes indent-for-tab-command, which cascades, via
> > indent-line-function, to treesit-indent. But it does nothing.
> > 
> > Similarly, if my code uses a lambda to set an Action type, like so:
> > 
> >     Action<Int64> createProgress = (x) =>
> >  {
> >         ...
> >   };
> > 
> > ...pressing TAB on the line with the open curly does nothing. I would
> > expect it to properly indent the open curly.
> > 
> > My diagnosis is: there is no rule to handle the using
> > statement, nor is there a rule for the lambda_expression in csharp-ts-mode--indent-rules. As
> > a result, in either case, the open curly does not get properly indented.
> > 
> > If I modify csharp-ts-mode--indent-rules to include rules for these
> > syntax elements, like so:
> > 
> >   ((parent-is "using_statement") parent-bol 0)
> >   ((parent-is "lambda_expression") parent-bol 0)
> > 
> > ...then a TAB will properly indent the open curlies in these situations.
> > 
> > This is how I monkey-patched it in my own init file:
> > 
> >   (eval-after-load "csharp-mode"
> >     '(progn
> >        (setf (cdr (car csharp-ts-mode--indent-rules))
> >              (cons
> >               '((parent-is "using_statement") parent-bol 0)
> >               (cdr (car csharp-ts-mode--indent-rules))))
> >        (setf (cdr (car csharp-ts-mode--indent-rules))
> >              (cons
> >               '((parent-is "lambda_expression") parent-bol 0)
> >               (cdr (car csharp-ts-mode--indent-rules))))
> >        (setq-local treesit-simple-indent-rules csharp-ts-mode--indent-rules)
> >   ))
> > 
> > After doing this, when I press TAB on the line with the open curlies in
> > the above situations, the open curly is properly indented.
> 
> Jostein and Yuan, could you please look into this?
> 
> 
> 
> 

Message #14 received at 75883 <at> debbugs.gnu.org (full text, mbox):

From: Jostein Kjønigsen <jostein <at> secure.kjonigsen.net>
To: Eli Zaretskii <eliz <at> gnu.org>, dpchiesa <at> hotmail.com
Cc: Jostein Kjønigsen <jostein <at> kjonigsen.net>,
 Yuan Fu <casouri <at> gmail.com>, 75883 <at> debbugs.gnu.org
Subject: Re: bug#75883: 29.4; csharp-ts-mode missing indent rules for using
 statement and lambda
Date: Sat, 8 Feb 2025 13:19:33 +0100

Hey Eli!

I've tested myself and can confirm Dino is absolutely correct about 
this. This particular grammar is not correctly supported. I've also 
tested his patch, and from what I can see, it works fine. I'd be happy 
to merge that.

I could author a patch myself based on existing Emacs-sources, but I 
think it would be better to give credit where credit is due, and let 
Dino author the patch and have his name to it :)

--
Jostein

On 2/8/25 10:35, Eli Zaretskii wrote:
> Ping!  Yuan and Jostein, could you please look into this?
>
>> Cc: 75883 <at> debbugs.gnu.org
>> Date: Mon, 27 Jan 2025 14:24:52 +0200
>> From: Eli Zaretskii <eliz <at> gnu.org>
>>
>>> From: dino chiesa <dpchiesa <at> hotmail.com>
>>> Date: Sun, 26 Jan 2025 23:32:09 +0000
>>>
>>> In csharp-ts-mode, the variable csharp-ts-mode--indent-rules holds the
>>> indent rules relevant to csharp that get set into
>>> treesit-simple-indent-rules.
>>>
>>> In the csharp-ts-mode--indent-rules list, there is no rule handles using
>>> statements, nor is there one for lambda expressions. The result is, when
>>> I am editing a C# module with something like this:
>>>
>>>      using (ZipFile zip = new ZipFile())
>>>   {
>>>           ...
>>>          }
>>>
>>> ... and press TAB on the line with the open curly, nothing happens. I
>>> would expect it to properly indent the curly, resulting in:
>>>
>>>      using (ZipFile zip = new ZipFile())
>>>      {
>>>           ...
>>>          }
>>>
>>> The TAB properly invokes indent-for-tab-command, which cascades, via
>>> indent-line-function, to treesit-indent. But it does nothing.
>>>
>>> Similarly, if my code uses a lambda to set an Action type, like so:
>>>
>>>      Action<Int64> createProgress = (x) =>
>>>   {
>>>          ...
>>>    };
>>>
>>> ...pressing TAB on the line with the open curly does nothing. I would
>>> expect it to properly indent the open curly.
>>>
>>> My diagnosis is: there is no rule to handle the using
>>> statement, nor is there a rule for the lambda_expression in csharp-ts-mode--indent-rules. As
>>> a result, in either case, the open curly does not get properly indented.
>>>
>>> If I modify csharp-ts-mode--indent-rules to include rules for these
>>> syntax elements, like so:
>>>
>>>    ((parent-is "using_statement") parent-bol 0)
>>>    ((parent-is "lambda_expression") parent-bol 0)
>>>
>>> ...then a TAB will properly indent the open curlies in these situations.
>>>
>>> This is how I monkey-patched it in my own init file:
>>>
>>>    (eval-after-load "csharp-mode"
>>>      '(progn
>>>         (setf (cdr (car csharp-ts-mode--indent-rules))
>>>               (cons
>>>                '((parent-is "using_statement") parent-bol 0)
>>>                (cdr (car csharp-ts-mode--indent-rules))))
>>>         (setf (cdr (car csharp-ts-mode--indent-rules))
>>>               (cons
>>>                '((parent-is "lambda_expression") parent-bol 0)
>>>                (cdr (car csharp-ts-mode--indent-rules))))
>>>         (setq-local treesit-simple-indent-rules csharp-ts-mode--indent-rules)
>>>    ))
>>>
>>> After doing this, when I press TAB on the line with the open curlies in
>>> the above situations, the open curly is properly indented.
>> Jostein and Yuan, could you please look into this?
>>
>>
>>
>>

Message #17 received at 75883 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Jostein Kjønigsen <jostein <at> secure.kjonigsen.net>
Cc: jostein <at> kjonigsen.net, casouri <at> gmail.com, 75883 <at> debbugs.gnu.org,
 dpchiesa <at> hotmail.com
Subject: Re: bug#75883: 29.4; csharp-ts-mode missing indent rules for using
 statement and lambda
Date: Sat, 08 Feb 2025 14:22:17 +0200

> Date: Sat, 8 Feb 2025 13:19:33 +0100
> Cc: 75883 <at> debbugs.gnu.org, Jostein Kjønigsen
>  <jostein <at> kjonigsen.net>, Yuan Fu <casouri <at> gmail.com>
> From: Jostein Kjønigsen <jostein <at> secure.kjonigsen.net>
> 
> I've tested myself and can confirm Dino is absolutely correct about 
> this. This particular grammar is not correctly supported. I've also 
> tested his patch, and from what I can see, it works fine. I'd be happy 
> to merge that.

Fine by me.

> I could author a patch myself based on existing Emacs-sources, but I 
> think it would be better to give credit where credit is due, and let 
> Dino author the patch and have his name to it :)

Sure, if Dino has a patch to fix this, let's use that.

Message #22 received at 75883 <at> debbugs.gnu.org (full text, mbox):

From: Jostein Kjønigsen <jostein <at> secure.kjonigsen.net>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: Jostein Kjønigsen <jostein <at> kjonigsen.net>,
 Yuan Fu <casouri <at> gmail.com>, 75883 <at> debbugs.gnu.org, dpchiesa <at> hotmail.com
Subject: Re: bug#75883: 29.4; csharp-ts-mode missing indent rules for using
 statement and lambda
Date: Fri, 21 Feb 2025 15:12:59 +0100

[Message part 1 (text/plain, inline)]

I don't see Dino chiming in, so I took his code and made a patch out of it, based on latest code in git master.

It might be installable in other branches too (like emacs-30), but I haven't tried that.



—
Kind Regards
Jostein Kjønigsen

> On 8 Feb 2025, at 13:22, Eli Zaretskii <eliz <at> gnu.org> wrote:
> 
>> Date: Sat, 8 Feb 2025 13:19:33 +0100
>> Cc: 75883 <at> debbugs.gnu.org, Jostein Kjønigsen
>> <jostein <at> kjonigsen.net>, Yuan Fu <casouri <at> gmail.com>
>> From: Jostein Kjønigsen <jostein <at> secure.kjonigsen.net>
>> 
>> I've tested myself and can confirm Dino is absolutely correct about 
>> this. This particular grammar is not correctly supported. I've also 
>> tested his patch, and from what I can see, it works fine. I'd be happy 
>> to merge that.
> 
> Fine by me.
> 
>> I could author a patch myself based on existing Emacs-sources, but I 
>> think it would be better to give credit where credit is due, and let 
>> Dino author the patch and have his name to it :)
> 
> Sure, if Dino has a patch to fix this, let's use that.

[Message part 2 (text/html, inline)]

[0001-lisp-progmodes-csharp-mode.el-Fix-identation.patch (application/octet-stream, attachment)]

[Message part 4 (text/html, inline)]

Message #27 received at 75883-done <at> debbugs.gnu.org (full text, mbox):

From: Stefan Kangas <stefankangas <at> gmail.com>
To: Jostein Kjønigsen <jostein <at> secure.kjonigsen.net>, 
 Eli Zaretskii <eliz <at> gnu.org>
Cc: 75883-done <at> debbugs.gnu.org, Yuan Fu <casouri <at> gmail.com>,
 Jostein Kjønigsen <jostein <at> kjonigsen.net>,
 dpchiesa <at> hotmail.com
Subject: Re: bug#75883: 29.4; csharp-ts-mode missing indent rules for using
 statement and lambda
Date: Fri, 21 Feb 2025 08:55:31 -0800

Jostein Kjønigsen <jostein <at> secure.kjonigsen.net> writes:

> I don't see Dino chiming in, so I took his code and made a patch out of it, based on latest code in git master.
>
> It might be installable in other branches too (like emacs-30), but I haven't tried that.

Thanks, installed on master (commit ecddc8227d9).  Closing.

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