From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.help Subject: Re: Is it ok to sort a list of overlays destructively? Date: Tue, 27 Jul 2021 16:49:30 +0300 Message-ID: <83bl6nvpcl.fsf@gnu.org> References: <87h7ggcov1.fsf@mbork.pl> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="34995"; mail-complaints-to="usenet@ciao.gmane.io" To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Tue Jul 27 15:50:16 2021 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1m8NTM-0008up-Ma for geh-help-gnu-emacs@m.gmane-mx.org; Tue, 27 Jul 2021 15:50:16 +0200 Original-Received: from localhost ([::1]:49784 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1m8NTL-0001dH-KY for geh-help-gnu-emacs@m.gmane-mx.org; Tue, 27 Jul 2021 09:50:15 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:55516) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m8NSj-0001ZL-RX for help-gnu-emacs@gnu.org; Tue, 27 Jul 2021 09:49:37 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:47192) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1m8NSj-0002wB-KT for help-gnu-emacs@gnu.org; Tue, 27 Jul 2021 09:49:37 -0400 Original-Received: from 84.94.185.95.cable.012.net.il ([84.94.185.95]:1266 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m8NSj-0000zT-67 for help-gnu-emacs@gnu.org; Tue, 27 Jul 2021 09:49:37 -0400 In-Reply-To: <87h7ggcov1.fsf@mbork.pl> (message from Marcin Borkowski on Tue, 27 Jul 2021 07:22:42 +0200) X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.io gmane.emacs.help:132121 Archived-At: > From: Marcin Borkowski > Date: Tue, 27 Jul 2021 07:22:42 +0200 > > I need to sort the list of overlays returned by `overlays-in'. The docs > for that function do not says explicitly that it creates a new list > every time, although a cursory glance at its source says that it > apparently does. Yes, it's a list that is created specifically for this function, and every time anew. (Internally, overlays of a buffer aren't stored as a single list, so returning anything but a copy would be impossible.) The doc string kinda hints on that, since it talks about sorting the list, which would be unthinkable if it were the internal storage.