From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: "Drew Adams" Newsgroups: gmane.emacs.bugs Subject: bug#9159: 24.0.50; `undo' is not as good as it should be wrt property changes Date: Tue, 2 Aug 2011 14:48:49 -0700 Message-ID: <692C81FB48E34A819D914252F0D995A4@us.oracle.com> References: <2770D343D58A43A6A97AC158A2C6B677@us.oracle.com><7FC41925A39D4B16A7F1CB3CCF4A4371@us.oracle.com> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Trace: dough.gmane.org 1312321784 9357 80.91.229.12 (2 Aug 2011 21:49:44 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Tue, 2 Aug 2011 21:49:44 +0000 (UTC) Cc: 9159@debbugs.gnu.org To: "'Lars Magne Ingebrigtsen'" Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Tue Aug 02 23:49:40 2011 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([140.186.70.17]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1QoMqH-0008PO-Vl for geb-bug-gnu-emacs@m.gmane.org; Tue, 02 Aug 2011 23:49:38 +0200 Original-Received: from localhost ([::1]:41343 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QoMqH-0007uW-KX for geb-bug-gnu-emacs@m.gmane.org; Tue, 02 Aug 2011 17:49:37 -0400 Original-Received: from eggs.gnu.org ([140.186.70.92]:57544) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QoMqE-0007uD-B8 for bug-gnu-emacs@gnu.org; Tue, 02 Aug 2011 17:49:35 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1QoMqD-0001Ks-5t for bug-gnu-emacs@gnu.org; Tue, 02 Aug 2011 17:49:34 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:39293) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QoMqD-0001Ko-38 for bug-gnu-emacs@gnu.org; Tue, 02 Aug 2011 17:49:33 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.69) (envelope-from ) id 1QoMqg-000614-Gz; Tue, 02 Aug 2011 17:50:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: "Drew Adams" Original-Sender: debbugs-submit-bounces@debbugs.gnu.org Resent-To: owner@debbugs.gnu.org Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Tue, 02 Aug 2011 21:50:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 9159 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 9159-submit@debbugs.gnu.org id=B9159.131232177223084 (code B ref 9159); Tue, 02 Aug 2011 21:50:02 +0000 Original-Received: (at 9159) by debbugs.gnu.org; 2 Aug 2011 21:49:32 +0000 Original-Received: from localhost ([127.0.0.1] helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1QoMqB-00060G-LY for submit@debbugs.gnu.org; Tue, 02 Aug 2011 17:49:32 -0400 Original-Received: from rcsinet15.oracle.com ([148.87.113.117]) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1QoMq8-000608-83 for 9159@debbugs.gnu.org; Tue, 02 Aug 2011 17:49:29 -0400 Original-Received: from acsinet21.oracle.com (acsinet21.oracle.com [141.146.126.237]) by rcsinet15.oracle.com (Switch-3.4.4/Switch-3.4.4) with ESMTP id p72Lmt0k019195 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Tue, 2 Aug 2011 21:48:57 GMT Original-Received: from acsmt357.oracle.com (acsmt357.oracle.com [141.146.40.157]) by acsinet21.oracle.com (8.14.4+Sun/8.14.4) with ESMTP id p72Lmsnc028762 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Tue, 2 Aug 2011 21:48:55 GMT Original-Received: from abhmt103.oracle.com (abhmt103.oracle.com [141.146.116.55]) by acsmt357.oracle.com (8.12.11.20060308/8.12.11) with ESMTP id p72LmngJ016306; Tue, 2 Aug 2011 16:48:49 -0500 Original-Received: from dradamslap1 (/130.35.178.194) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Tue, 02 Aug 2011 14:48:48 -0700 X-Mailer: Microsoft Office Outlook 11 In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6109 Thread-Index: AcxRWRMFOWC4U1IWRk6/HKdS3a0otQABADCw X-Source-IP: acsinet21.oracle.com [141.146.126.237] X-Auth-Type: Internal IP X-CT-RefId: str=0001.0A090207.4E3870C9.0081:SCFMA922111,ss=1,re=-4.000,fgs=0 X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list Resent-Date: Tue, 02 Aug 2011 17:50:02 -0400 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 1) X-Received-From: 140.186.70.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:49856 Archived-At: > > I already said in the OP that "while correct" (N.B.) "it would be > > better for the property `foo' to simply be removed." > > I don't think this is a bug (or should be fixed), but I wonder whether > it would make sense for Fput_text_property to just delete the property > instead of adding/setting `prop nil' to the property list in general? > > That is, if I say > (put-text-property (point-min) (1+ (point-min)) 'foo nil) > > today, `foo nil' is added. Perhaps it should just be ignored if not > already there, and if it's already set, then it should be removed? > > If we have established that there is no semantic difference > between nil properties and missing properties, then this sounds > like there could be (very minor) memory and redisplay efficiencies > to be won here. Presumably Stefan agrees (?) but considers that improvement only cosmetic, so fodder for the wishlist (/dev/null) cannon.