From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.comp.tex.context/68846 Path: news.gmane.org!not-for-mail From: Hans Hagen Newsgroups: gmane.comp.tex.context Subject: Re: unusual behaviour of \if(x) Date: Wed, 01 Jun 2011 15:56:06 +0200 Message-ID: <4DE644F6.5070107@wxs.nl> References: Reply-To: mailing list for ConTeXt users NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit X-Trace: dough.gmane.org 1306936590 7521 80.91.229.12 (1 Jun 2011 13:56:30 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Wed, 1 Jun 2011 13:56:30 +0000 (UTC) To: mailing list for ConTeXt users Original-X-From: ntg-context-bounces@ntg.nl Wed Jun 01 15:56:25 2011 Return-path: Envelope-to: gctc-ntg-context-518@m.gmane.org Original-Received: from balder.ntg.nl ([195.12.62.10]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1QRluF-0006p3-Ig for gctc-ntg-context-518@m.gmane.org; Wed, 01 Jun 2011 15:56:19 +0200 Original-Received: from localhost (localhost [127.0.0.1]) by balder.ntg.nl (Postfix) with ESMTP id 9739FCAD5A; Wed, 1 Jun 2011 15:56:18 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at balder.ntg.nl Original-Received: from balder.ntg.nl ([127.0.0.1]) by localhost (balder.ntg.nl [127.0.0.1]) (amavisd-new, port 10024) with LMTP id UgI9B8zC4sij; Wed, 1 Jun 2011 15:56:15 +0200 (CEST) Original-Received: from balder.ntg.nl (localhost [127.0.0.1]) by balder.ntg.nl (Postfix) with ESMTP id 05FD9CAD4B; Wed, 1 Jun 2011 15:56:15 +0200 (CEST) Original-Received: from localhost (localhost [127.0.0.1]) by balder.ntg.nl (Postfix) with ESMTP id 6DD2DCAD4B for ; Wed, 1 Jun 2011 15:56:13 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at balder.ntg.nl Original-Received: from balder.ntg.nl ([127.0.0.1]) by localhost (balder.ntg.nl [127.0.0.1]) (amavisd-new, port 10024) with LMTP id iF9bq851WaHR for ; Wed, 1 Jun 2011 15:56:11 +0200 (CEST) Original-Received: from filter1-til.mf.surf.net (filter1-til.mf.surf.net [194.171.167.217]) by balder.ntg.nl (Postfix) with ESMTP id 6FD8DCAD48 for ; Wed, 1 Jun 2011 15:56:11 +0200 (CEST) Original-Received: from smtp.ziggozakelijk.nl (D57D1DA2.static.ziggozakelijk.nl [213.125.29.162]) by filter1-til.mf.surf.net (8.14.3/8.14.3/Debian-5+lenny1) with ESMTP id p51DuAj6004296 for ; Wed, 1 Jun 2011 15:56:10 +0200 X-Default-Received-SPF: pass (skip=loggedin (res=PASS)) x-ip-name=10.100.1.100; Original-Received: from [10.100.1.100] (unverified [10.100.1.100]) by pragma-net.nl (SurgeMail 5.2a) with ESMTP id 887-1713362 for multiple; Wed, 01 Jun 2011 15:56:07 +0200 User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.17) Gecko/20110414 Lightning/1.0b2 Thunderbird/3.1.10 ThunderBrowse/3.3.5 In-Reply-To: X-Authenticated-User: hagen@controller-9 X-Bayes-Prob: 0.0001 (Score 0, tokens from: @@RPTN) X-CanIt-Geo: ip=213.125.29.162; country=NL; region=11; city=Den Haag; latitude=52.0833; longitude=4.3000; http://maps.google.com/maps?q=52.0833,4.3000&z=6 X-CanItPRO-Stream: uu:ntg-context@ntg.nl (inherits from uu:default, base:default) X-Canit-Stats-ID: 08EOBUaVv - 8445f26d3949 - 20110601 X-Scanned-By: CanIt (www . roaringpenguin . com) on 194.171.167.217 X-BeenThere: ntg-context@ntg.nl X-Mailman-Version: 2.1.12 Precedence: list List-Id: mailing list for ConTeXt users List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: ntg-context-bounces@ntg.nl Errors-To: ntg-context-bounces@ntg.nl Xref: news.gmane.org gmane.comp.tex.context:68846 Archived-At: On 1-6-2011 3:46, luigi scarso wrote: > On Wed, Jun 1, 2011 at 3:26 PM, Mojca Miklavec > wrote: >> Dear magitians, >> >> I discovered this in LaTeX, but ConTeXt behaves the same (plain TeX >> behaves differently). Can somebody please explain me why this code >> fails to work? (A workaround is to move \newif on top which I'm >> willing to do, but I'm still curious.) >> >> \starttext >> >> \ifx\hbox\undefined >> \message{invisible to tex} >> \newif\ifabc \abcfalse >> \ifabc \message{abc true breaks} \else \message{abc false breaks} \fi >> \fi >> >> \stoptext > (see wolfgang) > this works > > \newif\ifabc > \starttext > > \ifx\dhbox\undefined > \message{dhbox invisible to tex} > \abcfalse > \ifabc \message{abc true breaks} \else \message{abc false breaks} \fi > \fi > > > \ifx\hbox\undefined > \message{hbox invisible to tex} > \abcfalse > \ifabc \message{abc true breaks} \else \message{abc false breaks} \fi > \fi hm, you want to start an \ifx pissing contest ... ? \ifx\hbox\undefined \message{invisible to tex} \newif\ifabc \abcfalse \ifcsname ifabc\endcsname \message{abc true breaks} \else \message{abc false breaks} \fi \fi ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl ----------------------------------------------------------------- ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________