GNU bug report logs - #2723
Emacs 23: `interactive': prefix argument "P" and region "r" are mutually exclusive.

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From: help-debbugs <at> gnu.org (Emacs bug Tracking System)
To: Stefan Monnier <monnier <at> iro.umontreal.ca>
Subject: bug#2723: marked as done (Emacs 23: `interactive': prefix 
 argument "P" and region "r" are mutually exclusive.)
Date: Thu, 19 Mar 2009 20:45:04 +0000

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Your message dated Thu, 19 Mar 2009 16:40:11 -0400
with message-id <jwv8wn11c4c.fsf-monnier+emacsbugreports <at> gnu.org>
and subject line Re: bug#2723: Emacs 23: `interactive': prefix argument "P" and region "r" are mutually exclusive.
has caused the Emacs bug report #2723,
regarding Emacs 23: `interactive': prefix argument "P" and region "r" are mutually exclusive.
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
bug report if necessary, and/or fix the problem forthwith.

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-- 
2723: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=2723
Emacs Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Alan Mackenzie <acm <at> muc.de>
To: bug-gnu-emacs <at> gnu.org
Subject: Emacs 23: `interactive': prefix argument "P" and region "r" are
	mutually exclusive.
Date: Thu, 19 Mar 2009 19:15:24 +0000

Hi, Emacs!

In the following:

#########################################################################
(defun echo-prefix (arg)
  "Echo the command prefix"
  (interactive "P")
  (message "Command prefix: %s" arg))

(defun echo-region (beg end)
  "Echo the region boundaries"
  (interactive "r")
  (message "Region: (%s %s)" beg end))

(defun echo-region-prefix (beg end arg)
  "Echo the region and prefix parameters."
  (interactive "rP")
  (message "region: (%s %s); prefix: %s" beg end arg))
#########################################################################

, echo-prefix and echo-region work as expected.  echo-region-prefix
throws this error:

    Wrong number of arguments: (lambda (beg end arg) "Echo the region and
    prefix parameters." (interactive "rP") (message "region: (%s %s);
    prefix: %s" beg end arg)), 2

It seems that `(interactive "rP")' is only supplying the defun with two
parameters.

-- 
Alan Mackenzie (Nuremberg, Germany).

[Message part 3 (message/rfc822, inline)]

From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Alan Mackenzie <acm <at> muc.de>
Cc: 2723-done <at> debbugs.gnu.org
Subject: Re: bug#2723: Emacs 23: `interactive': prefix argument "P" and region "r" are mutually exclusive.
Date: Thu, 19 Mar 2009 16:40:11 -0400

> It seems that `(interactive "rP")' is only supplying the defun with two
> parameters.

Read C-h f interactive RET, and if you read carefully enough you'll see
you need (interactive "r\nP")


        Stefan

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