From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: Lisp primitives and their calling of the change hooks Date: Tue, 09 Jan 2018 15:07:58 -0500 Message-ID: References: <83mv1p8vki.fsf@gnu.org> <83bmi58sao.fsf@gnu.org> <20180107194845.GE22254@ACM> <838td98mqe.fsf@gnu.org> <20180107211055.GF22254@ACM> <837est81bl.fsf@gnu.org> <20180108192415.GA5531@ACM> <83h8rw6oio.fsf@gnu.org> <20180109195357.GA3869@ACM> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1515528393 26353 195.159.176.226 (9 Jan 2018 20:06:33 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Tue, 9 Jan 2018 20:06:33 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) Cc: Eli Zaretskii , emacs-devel@gnu.org To: Alan Mackenzie Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Tue Jan 09 21:06:29 2018 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1eZ0AG-0006U7-4Y for ged-emacs-devel@m.gmane.org; Tue, 09 Jan 2018 21:06:28 +0100 Original-Received: from localhost ([::1]:44894 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eZ0CF-0000Ih-IS for ged-emacs-devel@m.gmane.org; Tue, 09 Jan 2018 15:08:31 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:58656) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eZ0By-0000DY-6z for emacs-devel@gnu.org; Tue, 09 Jan 2018 15:08:25 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eZ0Bl-0002yd-Ec for emacs-devel@gnu.org; Tue, 09 Jan 2018 15:08:13 -0500 Original-Received: from pruche.dit.umontreal.ca ([132.204.246.22]:59608) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eZ0Bl-0002y1-87; Tue, 09 Jan 2018 15:08:01 -0500 Original-Received: from ceviche.home (lechon.iro.umontreal.ca [132.204.27.242]) by pruche.dit.umontreal.ca (8.14.7/8.14.1) with ESMTP id w09K7wGF002730; Tue, 9 Jan 2018 15:07:59 -0500 Original-Received: by ceviche.home (Postfix, from userid 20848) id 684646630A; Tue, 9 Jan 2018 15:07:58 -0500 (EST) In-Reply-To: <20180109195357.GA3869@ACM> (Alan Mackenzie's message of "Tue, 9 Jan 2018 19:53:57 +0000") X-NAI-Spam-Flag: NO X-NAI-Spam-Threshold: 5 X-NAI-Spam-Score: 0 X-NAI-Spam-Rules: 2 Rules triggered EDT_SA_DN_PASS=0, RV6196=0 X-NAI-Spam-Version: 2.3.0.9418 : core <6196> : inlines <6300> : streams <1775586> : uri <2566645> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 132.204.246.22 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 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" Xref: news.gmane.org gmane.emacs.devel:221768 Archived-At: > The way I see it, to announce in advance that the original region will be > deleted (by calling b-c-f for it) is suboptimal. But not incorrect. > If the decompression fails, we need to balance that b-c-f with > a "fake" a-c-f call. No, we don't. It's still within the rules to announce an upcoming change with b-c-f and then not to carry through (i.e. not make any changes and not call a-c-f). Stefan