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 p3F13vh7003573 for ; Fri, 15 Apr 2011 03:03:59 +0200 Received: (qmail 5886 invoked by alias); 15 Apr 2011 01:03:52 -0000 Delivered-To: GMX delivery to rainer.schoepf@gmx.net Received: (qmail invoked by alias); 15 Apr 2011 01:03:51 -0000 Received: from relay.uni-heidelberg.de (EHLO relay.uni-heidelberg.de) [129.206.100.212] by mx0.gmx.net (mx019) with SMTP; 15 Apr 2011 03:03:51 +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 p3F122de027591 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Fri, 15 Apr 2011 03:02:02 +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 p3EM180B027596; Fri, 15 Apr 2011 03:02:01 +0200 Received: by LISTSERV.UNI-HEIDELBERG.DE (LISTSERV-TCP/IP release 16.0) with spool id 1206034 for LATEX-L@LISTSERV.UNI-HEIDELBERG.DE; Fri, 15 Apr 2011 03:02:01 +0200 Received: from relay2.uni-heidelberg.de (relay2.uni-heidelberg.de [129.206.210.211]) by listserv.uni-heidelberg.de (8.13.1/8.13.1) with ESMTP id p3F121IU008086 for ; Fri, 15 Apr 2011 03:02:01 +0200 Received: from mail-pz0-f49.google.com (mail-pz0-f49.google.com [209.85.210.49]) by relay2.uni-heidelberg.de (8.13.8/8.13.8) with ESMTP id p3F11sk9028554 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=FAIL) for ; Fri, 15 Apr 2011 03:02:00 +0200 Received: by pzk5 with SMTP id 5so1084549pzk.22 for ; Thu, 14 Apr 2011 18:01:54 -0700 (PDT) Received: by 10.68.21.1 with SMTP id r1mr1047190pbe.471.1302829314282; Thu, 14 Apr 2011 18:01:54 -0700 (PDT) Received: from staff-250-048.wireless.adelaide.edu.au (staff-250-048.wireless.adelaide.edu.au [129.127.250.48]) by mx.google.com with ESMTPS id u6sm84558pbq.43.2011.04.14.18.01.51 (version=TLSv1/SSLv3 cipher=OTHER); Thu, 14 Apr 2011 18:01:53 -0700 (PDT) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Apple Message framework v1081) References: <4DA5C4E2.8090005@morningstar2.co.uk> <58AFBC3A-4209-4BC0-BB3A-5B14D6B5EFD8@gmail.com> <4DA727A9.2050903@morningstar2.co.uk> X-Mailer: Apple Mail (2.1081) X-Spam-Whitelist: Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by listserv.uni-heidelberg.de id p3F121IU008087 Message-ID: <00D373BA-0252-4C9B-AFF8-CBFC8E913182@gmail.com> Date: Fri, 15 Apr 2011 10:31:47 +0930 Reply-To: Mailing list for the LaTeX3 project Sender: Mailing list for the LaTeX3 project From: Will Robertson Subject: Re: The nature of popping from an empty sequence 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 (eXpurgate); Detail=5D7Q89H36p4yCuwxJv6KY0FCZRnwZ+13WQ6N/sj9VSKaFVOZ1DkOvFfI1/jfqD3wn3r8R Axtn+HEDrSQVb85SMTSnCq/FihPmtGhjAwfT7yQJed6SQQNQn1ioy1BT3Lnf1SjeDmFR760IJxLx QkiB4eMOpYrGq6RGs7I5TLbQ5LA5nSEi++qAfcVhnUB69iBOlYjuj9dPrLsWI/XBTrA7w==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: 6706 On 15/04/2011, at 9:52 AM, Bruno Le Floch wrote: >>> * These should probably be consistent. >>> * I think returning a quark is dangerous in case of sloppy package >>> authors. > > From the seq point of view, I like the idea of \seq_pop:NNF, with a > \seq_pop:NN variant for an expl3-provided error. We seem to be in large agreement on this particular point (speak up if not), so let's pencil it in to be incorporated into the revisions to seq. -- Will