GNU bug report logs - #64138
28.2; C-x ) won't accept the universal argument

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Al Petrofsky <al <at> petrofsky.org>
Subject: bug#64138: closed (Re: bug#64138: 28.2; C-x ) won't accept the
 universal argument)
Date: Wed, 21 Jun 2023 14:03:01 +0000

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Your bug report

#64138: 28.2; C-x ) won't accept the universal argument

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 64138 <at> debbugs.gnu.org.

-- 
64138: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=64138
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Eli Zaretskii <eliz <at> gnu.org>
To: Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: al <at> petrofsky.org, 64138-done <at> debbugs.gnu.org
Subject: Re: bug#64138: 28.2; C-x ) won't accept the universal argument
Date: Wed, 21 Jun 2023 17:02:06 +0300

> From: Stefan Monnier <monnier <at> iro.umontreal.ca>
> Cc: Al Petrofsky <al <at> petrofsky.org>,  64138 <at> debbugs.gnu.org
> Date: Sun, 18 Jun 2023 10:08:04 -0400
> 
> >> I have no objections to extending those commands to accept just C-u,
> >> though.  Stefan, any reasons why not?
> > Offhand, I can't think of any reason why not.
> 
> BTW: the main question here is whether a C-1 prefix should be treated
> the same as the absence of a prefix.  AFAICT, the `arg` argument
> of `kmacro-end-macro` is only used once, to pass it to `end-kbd-macro`,
> and that function starts with:
> 
>       if (NILP (repeat))
>         XSETFASTINT (repeat, 1);
>       else
>         CHECK_FIXNUM (repeat);
> 
> so, the absence of a prefix arg currently should indeed always behave
> exactly as with a `C-1` arg.
> IOW, I'm pretty sure now that there is not reason why not.

OK, thanks.  I've now installed this on the master branch, and I'm
closing this bug.

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From: Al Petrofsky <al <at> petrofsky.org>
To: bug-gnu-emacs <at> gnu.org
Subject: 28.2; C-x ) won't accept the universal argument
Date: Sat, 17 Jun 2023 19:47:47 -0400

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   emacs-28.2 -Q -nw
   C-x ( x C-u C-x )

The C-u C-x ) should complete the macro definition and then execute
the macro three times, making the buffer contents "xxxx".  Instead,
the error "Wrong type argument: fixnump, (4)" occurs.

(Changing "C-u" to "C-u 4" gives the expected result.)

The "P" in the interactive declaration of kmacro-end-macro should be a
"p".

Looking at all eleven "P" in kmacro.el, I think four of them should be
"p": kmacro-call-ring-2nd, kmacro-call-ring-2nd-repeat,
kmacro-end-macro, and kmacro-end-and-call-macro.

Alternatively, if the meaning of a bare C-u argument is being reserved
for some future feature, then it should be explicitly mentioned in the
documentation that C-u and C-u 4 are treated differently.  As the
manual says:

      A few commands treat a plain ‘C-u’ differently from an ordinary
   argument.  A few others may treat an argument of just a minus sign
   differently from an argument of −1.  These unusual cases are described
   when they come up; they exist to make an individual command more
   convenient, and they are documented in that command’s documentation
   string.

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