Received: from mx0.gmx.net (mx0.gmx.net [213.165.64.100]) by h1439878.stratoserver.net (8.14.2/8.14.2/Debian-2build1) with SMTP id p4GLQsMX019605 for ; Mon, 16 May 2011 23:26:55 +0200 Received: (qmail 8911 invoked by alias); 16 May 2011 21:26:49 -0000 Delivered-To: GMX delivery to rainer.schoepf@gmx.net Received: (qmail invoked by alias); 16 May 2011 21:26:48 -0000 Received: from relay.uni-heidelberg.de (EHLO relay.uni-heidelberg.de) [129.206.100.212] by mx0.gmx.net (mx115) with SMTP; 16 May 2011 23:26:48 +0200 Received: from listserv.uni-heidelberg.de (listserv.uni-heidelberg.de [129.206.100.94]) by relay.uni-heidelberg.de (8.14.1/8.14.1) with ESMTP id p4GLO4mQ024701 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Mon, 16 May 2011 23:24:04 +0200 Received: from listserv.uni-heidelberg.de (localhost.localdomain [127.0.0.1]) by listserv.uni-heidelberg.de (8.13.1/8.13.1) with ESMTP id p4GKkjJ0004064; Mon, 16 May 2011 23:24:03 +0200 Received: by LISTSERV.UNI-HEIDELBERG.DE (LISTSERV-TCP/IP release 16.0) with spool id 1306563 for LATEX-L@LISTSERV.UNI-HEIDELBERG.DE; Mon, 16 May 2011 23:24:03 +0200 Received: from relay.uni-heidelberg.de (relay.uni-heidelberg.de [129.206.100.212]) by listserv.uni-heidelberg.de (8.13.1/8.13.1) with ESMTP id p4GLO364017700 for ; Mon, 16 May 2011 23:24:03 +0200 Received: from moutng.kundenserver.de (moutng.kundenserver.de [212.227.17.8]) by relay.uni-heidelberg.de (8.14.1/8.14.1) with ESMTP id p4GLNwpW024674 for ; Mon, 16 May 2011 23:24:02 +0200 Received: from morse.mittelbach-online.de (p3EE3F64F.dip.t-dialin.net [62.227.246.79]) by mrelayeu.kundenserver.de (node=mrbap3) with ESMTP (Nemesis) id 0M2u1e-1PWrh43Vp8-00sbwE; Mon, 16 May 2011 23:17:41 +0200 Received: by morse.mittelbach-online.de (Postfix, from userid 501) id 13FE074F17; Mon, 16 May 2011 23:17:37 +0200 (CEST) MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 References: <4DCA93CC.5020605@morningstar2.co.uk> <19920.15087.714131.100464@morse.mittelbach-online.de> <447088.31292.qm@web24704.mail.ird.yahoo.com> X-Mailer: VM 7.19 under Emacs 21.3.1 X-Provags-ID: V02:K0:+ZTYGZCNweF2paXHAtgL0j+1ZNwDfzl+M167RK5wt02 0mcVhD8IsDln9QfzHR60/AFS8quielOvljalglz5GXNbPD9Pdf TEsIMraiv96yqKWfur8hGbKywBga8fj32WpmL5NkDwWAffK92u IzRcB/FYlXbQWittXpqhUuHaos21zeq10hPhIqD7H4li+hKYc1 Zqfxl2rifaNr/I9ClUJRg== X-Spam-Whitelist-Provider: Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by listserv.uni-heidelberg.de id p4GLO364017701 Message-ID: <19921.38001.821176.312946@morse.mittelbach-online.de> Date: Mon, 16 May 2011 23:17:37 +0200 Reply-To: Mailing list for the LaTeX3 project Sender: Mailing list for the LaTeX3 project From: Frank Mittelbach Subject: Re: xparse and space skipping To: LATEX-L@listserv.uni-heidelberg.de In-Reply-To: <447088.31292.qm@web24704.mail.ird.yahoo.com> Precedence: list List-Help: , List-Unsubscribe: List-Subscribe: List-Owner: List-Archive: X-GMX-Antispam: 0 (eXpurgate); Detail=5D7Q89H36p6myV/soHys3aIHfn03H1tOkgtpaEjjHKa6PjBIqqR9Cqs0bneiehu4Nm/Ga c0PopeEleXmCGuRkwh0Xz/bQKxa+zE18GnhxVkbafq/s/yLp0xtncFUE48qYIlUlj67llfdI0Npw qffevdRznFqXviWxtCzV08Snucip/iq+56HYNvL5cLsK86H5C4fHtCgsVOum2PNLWn32w==V1; X-Resent-By: Forwarder X-Resent-For: rainer.schoepf@gmx.net X-Resent-To: rainer@rainer-schoepf.de Status: R X-Status: X-Keywords: X-UID: 6757 Chris, > Another common use-case where (as with the AMS \\ in maths) > something non-standard seems intuitive is things  > '\item-like \foo s'  > > > Where > > \foo [arg]   has the standard 'argument meaning' > > but > > \foo > [Paranthetical text starts here. ... right, this is what one really would want with such type of commands, but we all well know, do going within the limits of the TeX parser (and for xparse I think the TeX parser is a given). My question was more is there any other command within the 2e world where people have applied the amsmath redefinition for looking for an optional argument (ie without gobbling spaces). frank