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 p9CKiIOO004058 for ; Wed, 12 Oct 2011 22:44:19 +0200 Received: (qmail 5047 invoked by alias); 12 Oct 2011 20:44:13 -0000 Delivered-To: GMX delivery to rainer.schoepf@gmx.net Received: (qmail invoked by alias); 12 Oct 2011 20:44:12 -0000 Received: from relay2.uni-heidelberg.de (EHLO relay2.uni-heidelberg.de) [129.206.210.211] by mx0.gmx.net (mx101) with SMTP; 12 Oct 2011 22:44:12 +0200 Received: from listserv.uni-heidelberg.de (listserv.uni-heidelberg.de [129.206.100.94]) by relay2.uni-heidelberg.de (8.13.8/8.13.8) with ESMTP id p9CKeSTP016309 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Wed, 12 Oct 2011 22:40:28 +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 p9CJIiEd000485; Wed, 12 Oct 2011 22:40:27 +0200 Received: by LISTSERV.UNI-HEIDELBERG.DE (LISTSERV-TCP/IP release 16.0) with spool id 1823991 for LATEX-L@LISTSERV.UNI-HEIDELBERG.DE; Wed, 12 Oct 2011 22:40:27 +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 p9CKeRsF027452 for ; Wed, 12 Oct 2011 22:40:27 +0200 Received: from anchor-post-2.mail.demon.net (anchor-post-2.mail.demon.net [195.173.77.133]) by relay.uni-heidelberg.de (8.14.1/8.14.1) with ESMTP id p9CKeCRv022490 for ; Wed, 12 Oct 2011 22:40:16 +0200 Received: from cremornelane.demon.co.uk ([80.177.25.195] helo=palladium.local) by anchor-post-2.mail.demon.net with esmtp (Exim 4.69) id 1RE5b2-0005B1-k7 for LATEX-L@LISTSERV.UNI-HEIDELBERG.DE; Wed, 12 Oct 2011 20:40:12 +0000 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:7.0.1) Gecko/20110929 Thunderbird/7.0.1 MIME-Version: 1.0 References: <4E95A9C2.6020607@residenset.net> <4E95C086.7060806@morningstar2.co.uk> X-Enigmail-Version: 1.3.2 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Message-ID: <4E95FB2C.1060809@morningstar2.co.uk> Date: Wed, 12 Oct 2011 21:40:12 +0100 Reply-To: Mailing list for the LaTeX3 project Sender: Mailing list for the LaTeX3 project From: Joseph Wright Subject: Re: Church booleans To: LATEX-L@listserv.uni-heidelberg.de In-Reply-To: Precedence: list List-Help: , List-Unsubscribe: List-Subscribe: List-Owner: List-Archive: X-GMX-Antispam: 0 (Sender is in whitelist: joseph.wright@MORNINGSTAR2.CO.UK); Detail=5D7Q89H36p4L00VTXC6D4q0N+AH0PUCnBi0P5cROEGjO+pG7NAH/K+tf9SrVFtpLrKONl 2T9EL4W4U4jgzLbnCcGpk1z/zwmKT/K1fv3lD0=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: 6930 On 12/10/2011 17:59, Bruno Le Floch wrote: > I think that Lars has in the past [1] advocated against the infix > syntax as being an attempt to impose upon TeX some foreign and not > very appropriate syntax (please correct me if I misunderstood you). In > this perspective, providing \and:nn etc. as Lars proposes would be > much faster than the current approach, and would accomodate trivially > for non-expandable conditionals. There was certainly some discussion of infix notation. I have mixed feelings as using "&&" raises some awkward issues, if nothing else. Performance-wise, it will always be slower than grabbing arguments, but on the other hand infix is rather easier to follow. -- Joseph Wright