From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: ptrdiff_t misuse Date: Fri, 06 Jul 2012 19:00:20 +0300 Message-ID: <8339543mnf.fsf@gnu.org> References: <83lij66yq9.fsf@gnu.org> <4FEDB953.1010800@yandex.ru> <4FEEA720.2040405@cs.ucla.edu> <4FEEFBAB.6000404@cs.ucla.edu> <4FF3E1D6.1050103@cs.ucla.edu> <83bojv4h13.fsf@gnu.org> <4FF48920.501@cs.ucla.edu> <83vci22mr0.fsf@gnu.org> <83obnu2e8s.fsf@gnu.org> <4FF62C92.8090406@cs.ucla.edu> <83liix2xvp.fsf@gnu.org> <4FF69476.2070701@cs.ucla.edu> <83ipe12s6r.fsf@gnu.org> <8739556vjm.fsf@uwakimon.sk.tsukuba.ac.jp> <83bojt2lwm.fsf@gnu.org> <4FF6FCB0.8080400@cs.ucla.edu> <834npk3nfa.fsf@gnu.org> <4FF70A94.4050700@cs.ucla.edu> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: dough.gmane.org 1341590447 9269 80.91.229.3 (6 Jul 2012 16:00:47 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Fri, 6 Jul 2012 16:00:47 +0000 (UTC) Cc: stephen@xemacs.org, dmantipov@yandex.ru, monnier@iro.umontreal.ca, emacs-devel@gnu.org To: Paul Eggert Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Fri Jul 06 18:00:46 2012 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1SnAxZ-0003TQ-Fh for ged-emacs-devel@m.gmane.org; Fri, 06 Jul 2012 18:00:45 +0200 Original-Received: from localhost ([::1]:55221 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SnAxY-0002wa-1y for ged-emacs-devel@m.gmane.org; Fri, 06 Jul 2012 12:00:44 -0400 Original-Received: from eggs.gnu.org ([208.118.235.92]:60013) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SnAxO-0002Zf-5f for emacs-devel@gnu.org; Fri, 06 Jul 2012 12:00:39 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1SnAxJ-0005F8-B0 for emacs-devel@gnu.org; Fri, 06 Jul 2012 12:00:33 -0400 Original-Received: from mtaout21.012.net.il ([80.179.55.169]:52418) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SnAxJ-0005DS-2c for emacs-devel@gnu.org; Fri, 06 Jul 2012 12:00:29 -0400 Original-Received: from conversion-daemon.a-mtaout21.012.net.il by a-mtaout21.012.net.il (HyperSendmail v2007.08) id <0M6Q00000XKSW000@a-mtaout21.012.net.il> for emacs-devel@gnu.org; Fri, 06 Jul 2012 19:00:27 +0300 (IDT) Original-Received: from HOME-C4E4A596F7 ([87.69.210.75]) by a-mtaout21.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0M6Q000IYXSQVR10@a-mtaout21.012.net.il>; Fri, 06 Jul 2012 19:00:27 +0300 (IDT) In-reply-to: <4FF70A94.4050700@cs.ucla.edu> X-012-Sender: halo1@inter.net.il X-detected-operating-system: by eggs.gnu.org: Solaris 10 (beta) X-Received-From: 80.179.55.169 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:151458 Archived-At: > Date: Fri, 06 Jul 2012 08:56:04 -0700 > From: Paul Eggert > CC: stephen@xemacs.org, dmantipov@yandex.ru, monnier@iro.umontreal.ca, > emacs-devel@gnu.org > > > What for? they span the same range of values. > > Yes, that's the point -- if ptrdiff_t and EMACS_POS > would span the same range of values, why bother to > distinguish the two? Because Emacs positions are not pointers, nor differences between pointers. > Whether a value is a buffer position is usually clearly stated in > the variable name. I refer you to the recent repeated confusions about this by Dmitry.