GNU bug report logs - #75310
Eliminate obsolete alias warning

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

From: Peter Oliver <p.d.oliver <at> mavit.org.uk>
To: bug-gnu-emacs <at> gnu.org
Subject: Eliminate obsolete alias warning
Date: Fri, 3 Jan 2025 11:41:46 +0000 (GMT)

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

A patch is attached to eliminate a warning in lisp/treesit.el.

-- 
Peter Oliver

[0001-Eliminate-obsolete-alias-warning.patch (text/plain, attachment)]

Message #8 received at 75310 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Peter Oliver <p.d.oliver <at> mavit.org.uk>
Cc: 75310 <at> debbugs.gnu.org
Subject: Re: bug#75310: Eliminate obsolete alias warning
Date: Fri, 03 Jan 2025 14:02:21 +0200

> Date: Fri, 3 Jan 2025 11:41:46 +0000 (GMT)
> From: Peter Oliver <p.d.oliver <at> mavit.org.uk>
> 
> A patch is attached to eliminate a warning in lisp/treesit.el.
> 
> From 2a57f0e8b84ea8c99627b2e576cf71386f7c8aa6 Mon Sep 17 00:00:00 2001
> From: Peter Oliver <git <at> mavit.org.uk>
> Date: Fri, 3 Jan 2025 11:36:16 +0000
> Subject: [PATCH] Eliminate obsolete alias warning
> 
> * lisp/treesit.el (treesit-transpose-sexps): Replace obsolete alias loop
>   with cl-loop

I don't get any warning, and this 'loop' is not an obsolete alias:

  (and (treesit-available-p)
       (named-let loop ((res nil)  <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
                        (buffers (buffer-list)))
         (if (null buffers)
             (mapc (lambda (b)
                     (with-current-buffer b
                       (setq-local treesit-font-lock-level val)
                       (treesit-font-lock-recompute-features)
                       (treesit-font-lock-fontify-region (point-min)
                                                         (point-max))))
                   res)
           (let ((buffer (car buffers)))
             (with-current-buffer buffer
               (if treesit-font-lock-settings
                   (loop (append res (list buffer)) (cdr buffers))
                 (loop res (cdr buffers)))))))))

Message #11 received at 75310 <at> debbugs.gnu.org (full text, mbox):

From: Peter Oliver <p.d.oliver <at> mavit.org.uk>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 75310 <at> debbugs.gnu.org
Subject: Re: bug#75310: Eliminate obsolete alias warning
Date: Fri, 3 Jan 2025 14:11:00 +0000 (GMT)

On Fri, 3 Jan 2025, Eli Zaretskii wrote:

>> Date: Fri, 3 Jan 2025 11:41:46 +0000 (GMT)
>> From: Peter Oliver <p.d.oliver <at> mavit.org.uk>
>>
>> A patch is attached to eliminate a warning in lisp/treesit.el.
>>
>> From 2a57f0e8b84ea8c99627b2e576cf71386f7c8aa6 Mon Sep 17 00:00:00 2001
>> From: Peter Oliver <git <at> mavit.org.uk>
>> Date: Fri, 3 Jan 2025 11:36:16 +0000
>> Subject: [PATCH] Eliminate obsolete alias warning
>>
>> * lisp/treesit.el (treesit-transpose-sexps): Replace obsolete alias loop
>>   with cl-loop
>
> I don't get any warning, and this 'loop' is not an obsolete alias:

I see the warning with emacs -Q if I (require 'cl).

Apologies for the bad fix.

-- 
Peter Oliver

Message #14 received at 75310 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Peter Oliver <p.d.oliver <at> mavit.org.uk>
Cc: 75310 <at> debbugs.gnu.org
Subject: Re: bug#75310: Eliminate obsolete alias warning
Date: Fri, 03 Jan 2025 16:17:34 +0200

> Date: Fri, 3 Jan 2025 14:11:00 +0000 (GMT)
> From: Peter Oliver <p.d.oliver <at> mavit.org.uk>
> cc: 75310 <at> debbugs.gnu.org
> 
> On Fri, 3 Jan 2025, Eli Zaretskii wrote:
> 
> >> Date: Fri, 3 Jan 2025 11:41:46 +0000 (GMT)
> >> From: Peter Oliver <p.d.oliver <at> mavit.org.uk>
> >>
> >> A patch is attached to eliminate a warning in lisp/treesit.el.
> >>
> >> From 2a57f0e8b84ea8c99627b2e576cf71386f7c8aa6 Mon Sep 17 00:00:00 2001
> >> From: Peter Oliver <git <at> mavit.org.uk>
> >> Date: Fri, 3 Jan 2025 11:36:16 +0000
> >> Subject: [PATCH] Eliminate obsolete alias warning
> >>
> >> * lisp/treesit.el (treesit-transpose-sexps): Replace obsolete alias loop
> >>   with cl-loop
> >
> > I don't get any warning, and this 'loop' is not an obsolete alias:
> 
> I see the warning with emacs -Q if I (require 'cl).

You get the warning when you load cl, or when you load treesit after
cl?  Or something else?

IOW, can you show a minimal recipe for reproducing the problem,
starting from "emacs -Q"?

Thanks.

Message #17 received at 75310 <at> debbugs.gnu.org (full text, mbox):

From: Peter Oliver <p.d.oliver <at> mavit.org.uk>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 75310 <at> debbugs.gnu.org
Subject: Re: bug#75310: Eliminate obsolete alias warning
Date: Fri, 3 Jan 2025 14:47:53 +0000 (GMT)

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

On Fri, 3 Jan 2025, Eli Zaretskii wrote:

> IOW, can you show a minimal recipe for reproducing the problem,
> starting from "emacs -Q"?

$ src/emacs -Q --batch --eval "(progn (message emacs-version) (require 'cl) (require 'treesit))"
31.0.50
Package cl is deprecated
lisp/treesit.el: Warning: ‘loop’ is an obsolete alias (as of 27.1); use ‘cl-loop’ instead.

-- 
Peter Oliver

Message #20 received at 75310 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Peter Oliver <p.d.oliver <at> mavit.org.uk>,
 Yuan Fu <casouri <at> gmail.com>
Cc: 75310 <at> debbugs.gnu.org
Subject: Re: bug#75310: Eliminate obsolete alias warning
Date: Fri, 03 Jan 2025 17:27:42 +0200

> Date: Fri, 3 Jan 2025 14:47:53 +0000 (GMT)
> From: Peter Oliver <p.d.oliver <at> mavit.org.uk>
> cc: 75310 <at> debbugs.gnu.org
> 
> On Fri, 3 Jan 2025, Eli Zaretskii wrote:
> 
> > IOW, can you show a minimal recipe for reproducing the problem,
> > starting from "emacs -Q"?
> 
> $ src/emacs -Q --batch --eval "(progn (message emacs-version) (require 'cl) (require 'treesit))"
> 31.0.50
> Package cl is deprecated
> lisp/treesit.el: Warning: ‘loop’ is an obsolete alias (as of 27.1); use ‘cl-loop’ instead.

Thanks.

Yuan, I think it would be good to rename 'loop' there to some other
name, do you agree?

Message #25 received at 75310 <at> debbugs.gnu.org (full text, mbox):

From: Yuan Fu <casouri <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: Peter Oliver <p.d.oliver <at> mavit.org.uk>, 75310 <at> debbugs.gnu.org
Subject: Re: bug#75310: Eliminate obsolete alias warning
Date: Fri, 3 Jan 2025 23:33:25 -0800

> On Jan 3, 2025, at 7:27 AM, Eli Zaretskii <eliz <at> gnu.org> wrote:
> 
>> Date: Fri, 3 Jan 2025 14:47:53 +0000 (GMT)
>> From: Peter Oliver <p.d.oliver <at> mavit.org.uk>
>> cc: 75310 <at> debbugs.gnu.org
>> 
>> On Fri, 3 Jan 2025, Eli Zaretskii wrote:
>> 
>>> IOW, can you show a minimal recipe for reproducing the problem,
>>> starting from "emacs -Q"?
>> 
>> $ src/emacs -Q --batch --eval "(progn (message emacs-version) (require 'cl) (require 'treesit))"
>> 31.0.50
>> Package cl is deprecated
>> lisp/treesit.el: Warning: ‘loop’ is an obsolete alias (as of 27.1); use ‘cl-loop’ instead.
> 
> Thanks.
> 
> Yuan, I think it would be good to rename 'loop' there to some other
> name, do you agree?

I would definitely agree. I’ve always used cl-loop (and now I try to not use it for new code). The only instance of “loop” I can find in treesit.el is in a named-let in treesit-transpose-sexps wriiten by Theo, and it’s not the CL loop but a local function defined by named-let. I wanted to rewrite it so it doesn’t use named-let because it’s not very readable, but tbh I haven’t find the time to understand that function well enough to rewrite it (because it’s not very readable :-)

It could be that only I can’t understand it, but code should be simple enough that even I can understand ;-)

Once I rewrite it, there shouldn't be any occurrence of loop in treesit.el.

treesit-transpose-sexps looks like this:

(defun treesit-transpose-sexps (&optional arg)
  "Tree-sitter `transpose-sexps' function.
ARG is the same as in `transpose-sexps'.

Locate the node closest to POINT, and transpose that node with
its sibling node ARG nodes away.

Return a pair of positions as described by
`transpose-sexps-function' for use in `transpose-subr' and
friends."
  ;; First arrive at the right level at where the node at point is
  ;; considered a sexp. If sexp isn't defined, or we can't find any
  ;; node that's a sexp, use the node at point.
  (let* ((node (or (treesit-thing-at-point 'sexp 'nested)
                   (treesit-node-at (point))))
         (parent (treesit-node-parent node))
         (child (treesit-node-child parent 0 t)))
    (named-let loop ((prev child)
                     (next (treesit-node-next-sibling child t)))
      (when (and prev next)
        (if (< (point) (treesit-node-end next))
            (if (= arg -1)
                (cons (treesit-node-start prev)
                      (treesit-node-end prev))
              (when-let* ((n (treesit-node-child
                              parent (+ arg (treesit-node-index prev t)) t)))
                (cons (treesit-node-end n)
                      (treesit-node-start n))))
          (loop (treesit-node-next-sibling prev t)
                (treesit-node-next-sibling next t)))))))

Yuan

Message #28 received at 75310 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Yuan Fu <casouri <at> gmail.com>
Cc: p.d.oliver <at> mavit.org.uk, 75310 <at> debbugs.gnu.org
Subject: Re: bug#75310: Eliminate obsolete alias warning
Date: Sat, 04 Jan 2025 10:29:08 +0200

> From: Yuan Fu <casouri <at> gmail.com>
> Date: Fri, 3 Jan 2025 23:33:25 -0800
> Cc: Peter Oliver <p.d.oliver <at> mavit.org.uk>,
>  75310 <at> debbugs.gnu.org
> 
> > On Jan 3, 2025, at 7:27 AM, Eli Zaretskii <eliz <at> gnu.org> wrote:
> > 
> >> Date: Fri, 3 Jan 2025 14:47:53 +0000 (GMT)
> >> From: Peter Oliver <p.d.oliver <at> mavit.org.uk>
> >> cc: 75310 <at> debbugs.gnu.org
> >> 
> >> On Fri, 3 Jan 2025, Eli Zaretskii wrote:
> >> 
> >>> IOW, can you show a minimal recipe for reproducing the problem,
> >>> starting from "emacs -Q"?
> >> 
> >> $ src/emacs -Q --batch --eval "(progn (message emacs-version) (require 'cl) (require 'treesit))"
> >> 31.0.50
> >> Package cl is deprecated
> >> lisp/treesit.el: Warning: ‘loop’ is an obsolete alias (as of 27.1); use ‘cl-loop’ instead.
> > 
> > Thanks.
> > 
> > Yuan, I think it would be good to rename 'loop' there to some other
> > name, do you agree?
> 
> I would definitely agree. I’ve always used cl-loop (and now I try to not use it for new code). The only instance of “loop” I can find in treesit.el is in a named-let in treesit-transpose-sexps wriiten by Theo, and it’s not the CL loop but a local function defined by named-let. I wanted to rewrite it so it doesn’t use named-let because it’s not very readable, but tbh I haven’t find the time to understand that function well enough to rewrite it (because it’s not very readable :-)
> 
> It could be that only I can’t understand it, but code should be simple enough that even I can understand ;-)

Renaming the symbol is easy, and doesn't require you to understand the
code completely.  We don't have to use cl-loop.

Message #31 received at 75310 <at> debbugs.gnu.org (full text, mbox):

From: Yuan Fu <casouri <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: Peter Oliver <p.d.oliver <at> mavit.org.uk>, 75310 <at> debbugs.gnu.org
Subject: Re: bug#75310: Eliminate obsolete alias warning
Date: Sat, 4 Jan 2025 11:26:38 -0800

> On Jan 4, 2025, at 12:29 AM, Eli Zaretskii <eliz <at> gnu.org> wrote:
> 
>> From: Yuan Fu <casouri <at> gmail.com>
>> Date: Fri, 3 Jan 2025 23:33:25 -0800
>> Cc: Peter Oliver <p.d.oliver <at> mavit.org.uk>,
>> 75310 <at> debbugs.gnu.org
>> 
>>> On Jan 3, 2025, at 7:27 AM, Eli Zaretskii <eliz <at> gnu.org> wrote:
>>> 
>>>> Date: Fri, 3 Jan 2025 14:47:53 +0000 (GMT)
>>>> From: Peter Oliver <p.d.oliver <at> mavit.org.uk>
>>>> cc: 75310 <at> debbugs.gnu.org
>>>> 
>>>> On Fri, 3 Jan 2025, Eli Zaretskii wrote:
>>>> 
>>>>> IOW, can you show a minimal recipe for reproducing the problem,
>>>>> starting from "emacs -Q"?
>>>> 
>>>> $ src/emacs -Q --batch --eval "(progn (message emacs-version) (require 'cl) (require 'treesit))"
>>>> 31.0.50
>>>> Package cl is deprecated
>>>> lisp/treesit.el: Warning: ‘loop’ is an obsolete alias (as of 27.1); use ‘cl-loop’ instead.
>>> 
>>> Thanks.
>>> 
>>> Yuan, I think it would be good to rename 'loop' there to some other
>>> name, do you agree?
>> 
>> I would definitely agree. I’ve always used cl-loop (and now I try to not use it for new code). The only instance of “loop” I can find in treesit.el is in a named-let in treesit-transpose-sexps wriiten by Theo, and it’s not the CL loop but a local function defined by named-let. I wanted to rewrite it so it doesn’t use named-let because it’s not very readable, but tbh I haven’t find the time to understand that function well enough to rewrite it (because it’s not very readable :-)
>> 
>> It could be that only I can’t understand it, but code should be simple enough that even I can understand ;-)
> 
> Renaming the symbol is easy, and doesn't require you to understand the
> code completely.  We don't have to use cl-loop.

Ah right, duh :-) Though I renamed the symbol and still gets the deprecation message. There’s no other “loop” in treesit.el, only cl-loop. Could you maybe take a look?

Yuan

Message #34 received at 75310 <at> debbugs.gnu.org (full text, mbox):

From: Yuan Fu <casouri <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: Peter Oliver <p.d.oliver <at> mavit.org.uk>, 75310 <at> debbugs.gnu.org
Subject: Re: bug#75310: Eliminate obsolete alias warning
Date: Sat, 4 Jan 2025 11:27:33 -0800

> On Jan 4, 2025, at 11:26 AM, Yuan Fu <casouri <at> gmail.com> wrote:
> 
> 
> 
>> On Jan 4, 2025, at 12:29 AM, Eli Zaretskii <eliz <at> gnu.org> wrote:
>> 
>>> From: Yuan Fu <casouri <at> gmail.com>
>>> Date: Fri, 3 Jan 2025 23:33:25 -0800
>>> Cc: Peter Oliver <p.d.oliver <at> mavit.org.uk>,
>>> 75310 <at> debbugs.gnu.org
>>> 
>>>> On Jan 3, 2025, at 7:27 AM, Eli Zaretskii <eliz <at> gnu.org> wrote:
>>>> 
>>>>> Date: Fri, 3 Jan 2025 14:47:53 +0000 (GMT)
>>>>> From: Peter Oliver <p.d.oliver <at> mavit.org.uk>
>>>>> cc: 75310 <at> debbugs.gnu.org
>>>>> 
>>>>> On Fri, 3 Jan 2025, Eli Zaretskii wrote:
>>>>> 
>>>>>> IOW, can you show a minimal recipe for reproducing the problem,
>>>>>> starting from "emacs -Q"?
>>>>> 
>>>>> $ src/emacs -Q --batch --eval "(progn (message emacs-version) (require 'cl) (require 'treesit))"
>>>>> 31.0.50
>>>>> Package cl is deprecated
>>>>> lisp/treesit.el: Warning: ‘loop’ is an obsolete alias (as of 27.1); use ‘cl-loop’ instead.
>>>> 
>>>> Thanks.
>>>> 
>>>> Yuan, I think it would be good to rename 'loop' there to some other
>>>> name, do you agree?
>>> 
>>> I would definitely agree. I’ve always used cl-loop (and now I try to not use it for new code). The only instance of “loop” I can find in treesit.el is in a named-let in treesit-transpose-sexps wriiten by Theo, and it’s not the CL loop but a local function defined by named-let. I wanted to rewrite it so it doesn’t use named-let because it’s not very readable, but tbh I haven’t find the time to understand that function well enough to rewrite it (because it’s not very readable :-)
>>> 
>>> It could be that only I can’t understand it, but code should be simple enough that even I can understand ;-)
>> 
>> Renaming the symbol is easy, and doesn't require you to understand the
>> code completely.  We don't have to use cl-loop.
> 
> Ah right, duh :-) Though I renamed the symbol and still gets the deprecation message. There’s no other “loop” in treesit.el, only cl-loop. Could you maybe take a look?

Never mind, the deprecation message is from requiring cl. The obsolete alias error is fixed by renaming the symbol.

Yuan

Message #39 received at 75310-done <at> debbugs.gnu.org (full text, mbox):

From: Yuan Fu <casouri <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 75310-done <at> debbugs.gnu.org, Peter Oliver <p.d.oliver <at> mavit.org.uk>
Subject: Re: bug#75310: Eliminate obsolete alias warning
Date: Sat, 4 Jan 2025 11:31:44 -0800

> On Jan 4, 2025, at 11:27 AM, Yuan Fu <casouri <at> gmail.com> wrote:
> 
> 
> 
>> On Jan 4, 2025, at 11:26 AM, Yuan Fu <casouri <at> gmail.com> wrote:
>> 
>> 
>> 
>>> On Jan 4, 2025, at 12:29 AM, Eli Zaretskii <eliz <at> gnu.org> wrote:
>>> 
>>>> From: Yuan Fu <casouri <at> gmail.com>
>>>> Date: Fri, 3 Jan 2025 23:33:25 -0800
>>>> Cc: Peter Oliver <p.d.oliver <at> mavit.org.uk>,
>>>> 75310 <at> debbugs.gnu.org
>>>> 
>>>>> On Jan 3, 2025, at 7:27 AM, Eli Zaretskii <eliz <at> gnu.org> wrote:
>>>>> 
>>>>>> Date: Fri, 3 Jan 2025 14:47:53 +0000 (GMT)
>>>>>> From: Peter Oliver <p.d.oliver <at> mavit.org.uk>
>>>>>> cc: 75310 <at> debbugs.gnu.org
>>>>>> 
>>>>>> On Fri, 3 Jan 2025, Eli Zaretskii wrote:
>>>>>> 
>>>>>>> IOW, can you show a minimal recipe for reproducing the problem,
>>>>>>> starting from "emacs -Q"?
>>>>>> 
>>>>>> $ src/emacs -Q --batch --eval "(progn (message emacs-version) (require 'cl) (require 'treesit))"
>>>>>> 31.0.50
>>>>>> Package cl is deprecated
>>>>>> lisp/treesit.el: Warning: ‘loop’ is an obsolete alias (as of 27.1); use ‘cl-loop’ instead.
>>>>> 
>>>>> Thanks.
>>>>> 
>>>>> Yuan, I think it would be good to rename 'loop' there to some other
>>>>> name, do you agree?
>>>> 
>>>> I would definitely agree. I’ve always used cl-loop (and now I try to not use it for new code). The only instance of “loop” I can find in treesit.el is in a named-let in treesit-transpose-sexps wriiten by Theo, and it’s not the CL loop but a local function defined by named-let. I wanted to rewrite it so it doesn’t use named-let because it’s not very readable, but tbh I haven’t find the time to understand that function well enough to rewrite it (because it’s not very readable :-)
>>>> 
>>>> It could be that only I can’t understand it, but code should be simple enough that even I can understand ;-)
>>> 
>>> Renaming the symbol is easy, and doesn't require you to understand the
>>> code completely.  We don't have to use cl-loop.
>> 
>> Ah right, duh :-) Though I renamed the symbol and still gets the deprecation message. There’s no other “loop” in treesit.el, only cl-loop. Could you maybe take a look?
> 
> Never mind, the deprecation message is from requiring cl. The obsolete alias error is fixed by renaming the symbol.
> 
> Yuan

Never mind × 2 :-) Juri just modified treesit-transpose-sexp so it doesn’t contain “loop” anymore.

Yuan

Message #42 received at 75310 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Yuan Fu <casouri <at> gmail.com>
Cc: p.d.oliver <at> mavit.org.uk, 75310 <at> debbugs.gnu.org
Subject: Re: bug#75310: Eliminate obsolete alias warning
Date: Sat, 04 Jan 2025 22:03:42 +0200

> From: Yuan Fu <casouri <at> gmail.com>
> Date: Sat, 4 Jan 2025 11:26:38 -0800
> Cc: Peter Oliver <p.d.oliver <at> mavit.org.uk>,
>  75310 <at> debbugs.gnu.org
> 
> 
> 
> > On Jan 4, 2025, at 12:29 AM, Eli Zaretskii <eliz <at> gnu.org> wrote:
> > 
> >> From: Yuan Fu <casouri <at> gmail.com>
> >> Date: Fri, 3 Jan 2025 23:33:25 -0800
> >> Cc: Peter Oliver <p.d.oliver <at> mavit.org.uk>,
> >> 75310 <at> debbugs.gnu.org
> >> 
> >>> On Jan 3, 2025, at 7:27 AM, Eli Zaretskii <eliz <at> gnu.org> wrote:
> >>> 
> >>>> Date: Fri, 3 Jan 2025 14:47:53 +0000 (GMT)
> >>>> From: Peter Oliver <p.d.oliver <at> mavit.org.uk>
> >>>> cc: 75310 <at> debbugs.gnu.org
> >>>> 
> >>>> On Fri, 3 Jan 2025, Eli Zaretskii wrote:
> >>>> 
> >>>>> IOW, can you show a minimal recipe for reproducing the problem,
> >>>>> starting from "emacs -Q"?
> >>>> 
> >>>> $ src/emacs -Q --batch --eval "(progn (message emacs-version) (require 'cl) (require 'treesit))"
> >>>> 31.0.50
> >>>> Package cl is deprecated
> >>>> lisp/treesit.el: Warning: ‘loop’ is an obsolete alias (as of 27.1); use ‘cl-loop’ instead.
> >>> 
> >>> Thanks.
> >>> 
> >>> Yuan, I think it would be good to rename 'loop' there to some other
> >>> name, do you agree?
> >> 
> >> I would definitely agree. I’ve always used cl-loop (and now I try to not use it for new code). The only instance of “loop” I can find in treesit.el is in a named-let in treesit-transpose-sexps wriiten by Theo, and it’s not the CL loop but a local function defined by named-let. I wanted to rewrite it so it doesn’t use named-let because it’s not very readable, but tbh I haven’t find the time to understand that function well enough to rewrite it (because it’s not very readable :-)
> >> 
> >> It could be that only I can’t understand it, but code should be simple enough that even I can understand ;-)
> > 
> > Renaming the symbol is easy, and doesn't require you to understand the
> > code completely.  We don't have to use cl-loop.
> 
> Ah right, duh :-) Though I renamed the symbol and still gets the deprecation message. There’s no other “loop” in treesit.el, only cl-loop. Could you maybe take a look?

You get deprecation message in what scenario?  If you see

  Package cl is deprecated

when you load cl, that's expected, and cannot be shut up.  The message
we want to avoid is this:

  lisp/treesit.el: Warning: ‘loop’ is an obsolete alias (as of 27.1); use ‘cl-loop’ instead.

Are you still seeing it after the change?

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