GNU bug report logs - #73880
Master: emacs-lisp-mode: Tab completion for a function position fails in a `let' form.

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Dmitry Gutov <dmitry <at> gutov.dev>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#73880: closed (Master: emacs-lisp-mode: Tab completion for a
 function position fails in a `let' form.)
Date: Tue, 29 Oct 2024 00:17:02 +0000

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Your message dated Tue, 29 Oct 2024 02:15:49 +0200
with message-id <2ae4581c-c13c-428c-ad9e-9b911fa704b6 <at> gutov.dev>
and subject line Re: bug#73880: Master: emacs-lisp-mode: Tab completion for a function position fails in a `let' form.
has caused the debbugs.gnu.org bug report #73880,
regarding Master: emacs-lisp-mode: Tab completion for a function position fails in a `let' form.
to be marked as done.

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help-debbugs <at> gnu.org.)


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73880: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=73880
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From: Alan Mackenzie <acm <at> muc.de>
To: bug-gnu-emacs <at> gnu.org
Cc: acm <at> muc.de
Subject: Master: emacs-lisp-mode: Tab completion for a function position
 fails in a `let' form.
Date: Sat, 19 Oct 2024 13:09:00 +0000

Hello, Emacs.

In a recent master version, for example this commit:

commit 5340fdaade1f8fe7af08293619cca89ae0796fcf (HEAD -> master, origin/master, origin/HEAD)
Author: Alan Mackenzie <acm <at> muc.de>
Date:   Wed Oct 16 13:17:26 2024 +0000

    CC Mode: Fix dodgy lisp `let' form.

, start emacs -Q, followed by entering the following incomplete form:

(defun foo ()
  (let (
        )
    (match-b

With point after match-b, type M-TAB.  This should complete to
match-beginning or show that function as a completion option.  Instead
it signals the error "No match".  This is a bug.

It would seem the completion function elisp-completion-at-point thinks
it is completing a variable symbol rather than a function symbol.

-- 
Alan Mackenzie (Nuremberg, Germany).

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From: Dmitry Gutov <dmitry <at> gutov.dev>
To: Alan Mackenzie <acm <at> muc.de>
Cc: 73880-done <at> debbugs.gnu.org
Subject: Re: bug#73880: Master: emacs-lisp-mode: Tab completion for a function
 position fails in a `let' form.
Date: Tue, 29 Oct 2024 02:15:49 +0200

Hi Alan,

On 28/10/2024 14:12, Alan Mackenzie wrote:

> So I'll withdraw my complaint about `(let (match-b.
> 
> I think your patch is better than my suggested fix, since it's much
> shorter and does the job.  I would be happy if you committed it and
> closed the bug.

Thanks for testing! Now pushed to master in commits 7681eacc399 and 
41f347c1d1a, and closing.

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