From mboxrd@z Thu Jan  1 00:00:00 1970
Path: news.gmane.org!not-for-mail
From: Helmut Eller <eller.helmut@gmail.com>
Newsgroups: gmane.emacs.help
Subject: Re: Is it possible for a macro to expand to nothing?
Date: Fri, 27 Nov 2009 18:19:11 +0100
Message-ID: <m2ws1bkhrk.fsf@gmail.com>
References: <hee7rf$15su$1@colin2.muc.de> <heedd6$1p5e$1@colin2.muc.de>
	<87vdh1ccra.fsf@galatea.local>
	<mailman.11354.1259004470.2239.help-gnu-emacs@gnu.org>
	<87my2dc8d7.fsf@galatea.local>
	<mailman.11367.1259014174.2239.help-gnu-emacs@gnu.org>
	<873a44dcf2.fsf@galatea.local> <hefaut$1gui$1@colin2.muc.de>
	<87pr78b6n9.fsf@galatea.local> <hegdgc$18ah$1@colin2.muc.de>
	<87ljhwb2dx.fsf@galatea.local> <heh27o$oht$1@colin2.muc.de>
	<mailman.11626.1259310779.2239.help-gnu-emacs@gnu.org>
	<heojcr$1a4h$2@colin2.muc.de> <873a406poe.fsf@galatea.local>
NNTP-Posting-Host: lo.gmane.org
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
X-Trace: ger.gmane.org 1259343814 12430 80.91.229.12 (27 Nov 2009 17:43:34 GMT)
X-Complaints-To: usenet@ger.gmane.org
NNTP-Posting-Date: Fri, 27 Nov 2009 17:43:34 +0000 (UTC)
To: help-gnu-emacs@gnu.org
Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Fri Nov 27 18:43:29 2009
Return-path: <help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org>
Envelope-to: geh-help-gnu-emacs@m.gmane.org
Original-Received: from lists.gnu.org ([199.232.76.165])
	by lo.gmane.org with esmtp (Exim 4.50)
	id 1NE4qu-0002Se-Rv
	for geh-help-gnu-emacs@m.gmane.org; Fri, 27 Nov 2009 18:43:29 +0100
Original-Received: from localhost ([127.0.0.1]:60211 helo=lists.gnu.org)
	by lists.gnu.org with esmtp (Exim 4.43)
	id 1NE4qu-0006fv-Hx
	for geh-help-gnu-emacs@m.gmane.org; Fri, 27 Nov 2009 12:43:28 -0500
Original-Path: news.stanford.edu!usenet.stanford.edu!postnews.google.com!news1.google.com!Xl.tags.giganews.com!border1.nntp.dca.giganews.com!nntp.giganews.com!local2.nntp.dca.giganews.com!nntp.kpnqwest.it!news.kpnqwest.it.POSTED!not-for-mail
Original-NNTP-Posting-Date: Fri, 27 Nov 2009 11:19:12 -0600
Original-Newsgroups: gnu.emacs.help
User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1.50 (gnu/linux)
Cancel-Lock: sha1:18rEzsYpxXX/oEJo5VJMW/qA/cA=
Original-Lines: 11
X-Usenet-Provider: http://www.giganews.com
Original-NNTP-Posting-Host: 212.46.177.121
Original-X-Trace: sv3-jYngH8qBmtEtxVrarZ9TWTrvO10O85iULOzczFymo9pe2rgUZL58nM03SMAkCYF745gI89wKtqoejxa!xUOzl3wVVZLFV/GB+W6N4B6z3OMduAfqPjFhqFfqUd1kNZsXr4tGLGr4zcRJbLs=
X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers
X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint
	properly
X-Postfilter: 1.3.40
Original-Xref: news.stanford.edu gnu.emacs.help:175121
X-BeenThere: help-gnu-emacs@gnu.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Users list for the GNU Emacs text editor <help-gnu-emacs.gnu.org>
List-Unsubscribe: <http://lists.gnu.org/mailman/listinfo/help-gnu-emacs>,
	<mailto:help-gnu-emacs-request@gnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/pipermail/help-gnu-emacs>
List-Post: <mailto:help-gnu-emacs@gnu.org>
List-Help: <mailto:help-gnu-emacs-request@gnu.org?subject=help>
List-Subscribe: <http://lists.gnu.org/mailman/listinfo/help-gnu-emacs>,
	<mailto:help-gnu-emacs-request@gnu.org?subject=subscribe>
Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org
Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org
Xref: news.gmane.org gmane.emacs.help:70194
Archived-At: <http://permalink.gmane.org/gmane.emacs.help/70194>

* Pascal J. Bourguignon [2009-11-27 14:52+0100] writes:

> ,@ cannot be put outside of a ` context, never ever.

That's not true.  ,@ outside of backquote is just an ordinary symbol:

(defun ,@ () "it works")
(defun , () "this works too")
(message "See, how %s.  And %s." (,@) (,))

Helmut