From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: [RFC]: replace-region-contents Date: Wed, 06 Feb 2019 09:09:33 -0500 Message-ID: References: <871s4rqk7u.fsf@gnu.org> <87o97syvno.fsf@gnu.org> <878syubwv3.fsf@gnu.org> <877eede3vk.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="186603"; mail-complaints-to="usenet@blaine.gmane.org" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) Cc: emacs-devel@gnu.org To: Tassilo Horn Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Wed Feb 06 15:09:59 2019 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:256) (Exim 4.89) (envelope-from ) id 1grNtm-000mLm-Aw for ged-emacs-devel@m.gmane.org; Wed, 06 Feb 2019 15:09:58 +0100 Original-Received: from localhost ([127.0.0.1]:51484 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1grNtl-00029J-An for ged-emacs-devel@m.gmane.org; Wed, 06 Feb 2019 09:09:57 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:38210) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1grNtf-00029C-QF for emacs-devel@gnu.org; Wed, 06 Feb 2019 09:09:52 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1grNtf-0003rQ-0R for emacs-devel@gnu.org; Wed, 06 Feb 2019 09:09:51 -0500 Original-Received: from chene.dit.umontreal.ca ([132.204.246.20]:36953) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1grNtc-0003f4-Sn; Wed, 06 Feb 2019 09:09:48 -0500 Original-Received: from pastel.home (lechon.iro.umontreal.ca [132.204.27.242]) by chene.dit.umontreal.ca (8.14.7/8.14.1) with ESMTP id x16E9cGi007917; Wed, 6 Feb 2019 09:09:44 -0500 Original-Received: by pastel.home (Postfix, from userid 20848) id 68F356A1FE; Wed, 6 Feb 2019 09:09:33 -0500 (EST) In-Reply-To: <877eede3vk.fsf@gnu.org> (Tassilo Horn's message of "Wed, 06 Feb 2019 09:07:59 +0100") 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, RV6477=0 X-NAI-Spam-Version: 2.3.0.9418 : core <6477> : inlines <7011> : streams <1812255> : uri <2791837> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 132.204.246.20 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:233043 Archived-At: > How would I actually use that version with a replace-fn returning a > buffer and not a string? It looks to me that I need to do the whole > ceremony of creating a temporary buffer, setting buffers, and ensuring > that the temporary buffer is killed even in the case of an abnormal exit > myself. Indeed (yet another reason why we should have anonymous buffers, which can be GC'd without having to go through kill-buffer), but as mentioned elsewhere I suspect that this use case will be rare, because when the output wants to be in a buffer rather than a string you will likely be able to do the replacement "in-place" without using a second buffer (and hence without needing the diffing machinery of replace-buffer-contents). Stefan