From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#8219: Effect of deletions on indirect buffers (Bug#8219) Date: Sat, 12 Mar 2011 10:15:05 +0200 Message-ID: <834o78u54m.fsf__26482.2650388398$1299919032$gmane$org@gnu.org> References: <877hc5bfqy.fsf@stupidchicken.com> <838vwlto85.fsf@gnu.org> <874o79nzla.fsf@stupidchicken.com> Reply-To: Eli Zaretskii NNTP-Posting-Host: lo.gmane.org X-Trace: dough.gmane.org 1299919032 11471 80.91.229.12 (12 Mar 2011 08:37:12 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Sat, 12 Mar 2011 08:37:12 +0000 (UTC) Cc: 8219@debbugs.gnu.org, emacs-devel@gnu.org To: Chong Yidong Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sat Mar 12 09:37:08 2011 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1PyKJv-0008BD-Dq for geb-bug-gnu-emacs@m.gmane.org; Sat, 12 Mar 2011 09:37:07 +0100 Original-Received: from localhost ([127.0.0.1]:53773 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1PyKJu-0006Yi-Sg for geb-bug-gnu-emacs@m.gmane.org; Sat, 12 Mar 2011 03:37:06 -0500 Original-Received: from [140.186.70.92] (port=44583 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1PyKJl-0006SM-PM for bug-gnu-emacs@gnu.org; Sat, 12 Mar 2011 03:36:58 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1PyKJk-0002ol-Dq for bug-gnu-emacs@gnu.org; Sat, 12 Mar 2011 03:36:57 -0500 Original-Received: from debbugs.gnu.org ([140.186.70.43]:40553) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1PyKJk-0002oe-Ap for bug-gnu-emacs@gnu.org; Sat, 12 Mar 2011 03:36:56 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.69) (envelope-from ) id 1PyJzW-0003ZZ-9B; Sat, 12 Mar 2011 03:16:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: debbugs-submit-bounces@debbugs.gnu.org Resent-To: owner@debbugs.gnu.org Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 12 Mar 2011 08:16:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 8219 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 8219-submit@debbugs.gnu.org id=B8219.129991771713680 (code B ref 8219); Sat, 12 Mar 2011 08:16:02 +0000 Original-Received: (at 8219) by debbugs.gnu.org; 12 Mar 2011 08:15:17 +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 1PyJym-0003Yb-NK for submit@debbugs.gnu.org; Sat, 12 Mar 2011 03:15:17 -0500 Original-Received: from mtaout20.012.net.il ([80.179.55.166]) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1PyJyk-0003YO-PJ for 8219@debbugs.gnu.org; Sat, 12 Mar 2011 03:15:15 -0500 Original-Received: from conversion-daemon.a-mtaout20.012.net.il by a-mtaout20.012.net.il (HyperSendmail v2007.08) id <0LHX00M00QPJTJ00@a-mtaout20.012.net.il> for 8219@debbugs.gnu.org; Sat, 12 Mar 2011 10:15:06 +0200 (IST) Original-Received: from HOME-C4E4A596F7 ([77.124.58.59]) by a-mtaout20.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0LHX00M0HQX0KF50@a-mtaout20.012.net.il>; Sat, 12 Mar 2011 10:15:01 +0200 (IST) In-reply-to: <874o79nzla.fsf@stupidchicken.com> X-012-Sender: halo1@inter.net.il X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list Resent-Date: Sat, 12 Mar 2011 03:16:02 -0500 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) 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: , Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:44934 Archived-At: > From: Chong Yidong > Cc: 8219@debbugs.gnu.org, emacs-devel@gnu.org > Date: Fri, 11 Mar 2011 15:58:57 -0500 > > Eli Zaretskii writes: > > >> Hence, in the aftermath of a deletion, buffer B's values of PT (and > >> BUF_BEGV and BUF_ZV) can be larger than BUF_ZV. > > > > Isn't that a bug, right there? Why doesn't del_range_2 update the > > indirect buffer (B) as well, when deletion removes text so that its PT > > becomes invalid? > > This is not currently easy. We don't keep track of indirect buffers > (looping over the buffer list each time we do a deletion would be rather > inefficient), so this would need some new members of the buffer struct. We could do that lazily, whenever something (including redisplay) is done on a buffer that happens to be an indirect buffer.