GNU bug report logs - #66509
29.1.50; let-alist should support numeric indexing

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#66509: closed (29.1.50; let-alist should support numeric
 indexing)
Date: Sat, 30 Aug 2025 11:02:03 +0000

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Your message dated Sat, 30 Aug 2025 14:00:37 +0300
with message-id <86qzwtoyzu.fsf <at> gnu.org>
and subject line Re: bug#66509: 29.1.50; let-alist should support numeric indexing
has caused the debbugs.gnu.org bug report #66509,
regarding 29.1.50; let-alist should support numeric indexing
to be marked as done.

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help-debbugs <at> gnu.org.)


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From: Spencer Baugh <sbaugh <at> janestreet.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 29.1.50; let-alist should support numeric indexing
Date: Thu, 12 Oct 2023 18:03:22 -0400

It would be nice if let-alist supported indexing.  So if my alist
contained lists in some places, instead of writing:

(let-alist alist
  (let-alist (nth 0 .a)
    (let-alist (nth 3 .b)
       .c)))

I could instead write:

(let-alist alist
  .a.0.b.3.c)

A patch which does this to follow.

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From: Eli Zaretskii <eliz <at> gnu.org>
To: Spencer Baugh <sbaugh <at> janestreet.com>
Cc: 66509-done <at> debbugs.gnu.org, stefankangas <at> gmail.com
Subject: Re: bug#66509: 29.1.50; let-alist should support numeric indexing
Date: Sat, 30 Aug 2025 14:00:37 +0300

> From: Spencer Baugh <sbaugh <at> janestreet.com>
> Cc: stefankangas <at> gmail.com,  66509 <at> debbugs.gnu.org
> Date: Fri, 29 Aug 2025 09:19:30 -0400
> 
> Eli Zaretskii <eliz <at> gnu.org> writes:
> 
> >> From: Spencer Baugh <sbaugh <at> janestreet.com>
> >> Cc: Eli Zaretskii <eliz <at> gnu.org>,  66509 <at> debbugs.gnu.org
> >> Date: Thu, 28 Aug 2025 15:05:08 -0400
> >> 
> >> Stefan Kangas <stefankangas <at> gmail.com> writes:
> >> 
> >> > Stefan Kangas <stefankangas <at> gmail.com> writes:
> >> >
> >> >> reopen 66509
> >> >> thanks
> >> >>
> >> >>>> Pushed to master (commit ae4171efdc6).
> >> >>>>
> >> >>>> I'm therefore closing this bug report.
> >> >>
> >> >> I'm reopening this bug report, based on this request from Robert Pluim:
> >> >>
> >> >>> Would it be possible to update the elisp manual as well (and maybe add
> >> >>> an entry to NEWS)?
> >> >>
> >> >> I think that should be done also, so I'm reopening the bug to track that
> >> >> work.  Spencer, do you think you could you please address it?
> >> >>
> >> >> Bonus points for adding tests, as requested by Eli.
> >> >
> >> > Ping!
> >> 
> >> Done in attached patch.
> >
> > Thanks.
> >
> >> ++++
> >> +** 'let-alist' supports indexing into lists
> >
> > Heading lines in NEWS should end in a period.
> 
> Fixed.
> 
> >> +The macro 'let-alist' now interprets symbols containing numbers as list
> >> +indexes.  For example, '.key.0' looks up 'key' in the alist and then
> >
> > "indices", I guess?
> 
> Fixed.
> 
> > Also, I see no patch for the ELisp manual, although the "+++" mark in
> > NEWS seems to imply that the manual was updated.  But the current
> > manual doesn't seem to say anything about keys that include indices,
> > or did I miss something?
> 
> Oops, fixed.

Thanks, now installed on the master branch, and closing the bug.

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