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 p078Iu7O020322 for ; Fri, 7 Jan 2011 09:18:57 +0100 Received: (qmail 19714 invoked by alias); 7 Jan 2011 08:18:51 -0000 Delivered-To: GMX delivery to rainer.schoepf@gmx.net Received: (qmail invoked by alias); 07 Jan 2011 08:18:50 -0000 Received: from relay.uni-heidelberg.de (EHLO relay.uni-heidelberg.de) [129.206.100.212] by mx0.gmx.net (mx045) with SMTP; 07 Jan 2011 09:18:50 +0100 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 p078Freo009197 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Fri, 7 Jan 2011 09:15:53 +0100 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 p0776eau013383; Fri, 7 Jan 2011 09:15:45 +0100 Received: by LISTSERV.UNI-HEIDELBERG.DE (LISTSERV-TCP/IP release 16.0) with spool id 772545 for LATEX-L@LISTSERV.UNI-HEIDELBERG.DE; Fri, 7 Jan 2011 09:15:45 +0100 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 p078FjIj025425 for ; Fri, 7 Jan 2011 09:15:45 +0100 Received: from ueamailgate02.uea.ac.uk (ueamailgate02.uea.ac.uk [139.222.131.185]) by relay.uni-heidelberg.de (8.14.1/8.14.1) with ESMTP id p078FIH5007466 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Fri, 7 Jan 2011 09:15:23 +0100 Received: from ueams01.uea.ac.uk (ueams01.uea.ac.uk [139.222.131.78]) by ueamailgate02.uea.ac.uk (8.13.8/8.13.8) with ESMTP id p078FCp1013970 for ; Fri, 7 Jan 2011 08:15:12 GMT Received: from [139.222.113.126] by ueams01.uea.ac.uk with esmtp (Exim 4.69) (envelope-from ) id 1Pb7Ta-0006LM-CY; Fri, 07 Jan 2011 08:15:10 +0000 User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-GB; rv:1.9.2.13) Gecko/20101207 Thunderbird/3.1.7 MIME-Version: 1.0 References: <4D22486F.5000506@morningstar2.co.uk> <19748.47294.93978.108113@morse.mittelbach-online.de> <4D24EC4B.1080307@morningstar2.co.uk> <19748.64800.644068.699289@morse.mittelbach-online.de> <4D262B9E.9020605@morningstar2.co.uk> <0C233110-56B2-40DA-A920-156175A1218D@gmail.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Bayes-Prob: 0.0001 (Score 0, tokens from: @@RPTN, outgoing) X-CanIt-Geo: ip=139.222.131.78; country=GB; region=I9; city=Norwich; latitude=52.6333; longitude=1.3000; http://maps.google.com/maps?q=52.6333,1.3000&z=6 X-CanItPRO-Stream: UEA:outgoing (inherits from UEA:default,base:default) X-Canit-Stats-ID: 66633824 - 860fc9e7e026 - 20110107 X-Scanned-By: CanIt (www . roaringpenguin . com) on 139.222.131.185 Message-ID: <4D26CB92.4090204@morningstar2.co.uk> Date: Fri, 7 Jan 2011 08:15:14 +0000 Reply-To: Mailing list for the LaTeX3 project Sender: Mailing list for the LaTeX3 project From: Joseph Wright Subject: Re: \box_if_empty:N(TF) To: LATEX-L@listserv.uni-heidelberg.de In-Reply-To: <0C233110-56B2-40DA-A920-156175A1218D@gmail.com> Precedence: list List-Help: , List-Unsubscribe: List-Subscribe: List-Owner: List-Archive: X-GMX-Antispam: 0 (Mail was not recognized as spam); Detail=5D7Q89H36p77e5KAPs1l6v/Sb97LojnDtMgfETrECMLUO9erHzOJe7j3G660N4yBY6XHH YPYtmQj6mbYUTZ3LnaFANLWrKE7/wIDhnv+VrW0hxOapLRUwuY9oBqo5h+Dh9B42XlFTMTKlXDju GaV8Q==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: 6546 On 07/01/2011 06:32, Will Robertson wrote: > I prefer "void" or "clear" instead of "unset" (all work as noun and verb), but I agree with changing the names. I don't mind the existence of "\box_use_clear:N" (or whatever) but I can see your argument against it. Is there any non-neglible performance decrease from writing > > \box_use:N \l_tmpa_box > \box_clear:N \l_tmpa_box > > over > > \box_use_clear:N \l_tmpa_box > > ? If not, I'd be happy to drop the use_clear function for the reason of consistency, as you note. Over all, I think 'void' is possible still the best choice. It suggests more than just 'empty', which 'clear' does not. So \box_void:N, \box_if_void:N(TF), etc., seem best. -- Joseph Wright