bug#75310: Eliminate obsolete alias warning

[Yuan Fu <casouri@gmail.com>]

> On Jan 4, 2025, at 11:26 AM, Yuan Fu <casouri@gmail.com> wrote:
> 
> 
> 
>> On Jan 4, 2025, at 12:29 AM, Eli Zaretskii <eliz@gnu.org> wrote:
>> 
>>> From: Yuan Fu <casouri@gmail.com>
>>> Date: Fri, 3 Jan 2025 23:33:25 -0800
>>> Cc: Peter Oliver <p.d.oliver@mavit.org.uk>,
>>> 75310@debbugs.gnu.org
>>> 
>>>> On Jan 3, 2025, at 7:27 AM, Eli Zaretskii <eliz@gnu.org> wrote:
>>>> 
>>>>> Date: Fri, 3 Jan 2025 14:47:53 +0000 (GMT)
>>>>> From: Peter Oliver <p.d.oliver@mavit.org.uk>
>>>>> cc: 75310@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