From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Alan Mackenzie Newsgroups: gmane.emacs.devel Subject: Re: seq.el and the complexity of Emacs Lisp. Date: Fri, 10 Nov 2023 10:03:48 +0000 Message-ID: References: <2879d846-b711-ada0-cdc4-9adcb4e56040@gmail.com> <656f8d5f-2850-062c-1b38-3b50367c64d5@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="33628"; mail-complaints-to="usenet@ciao.gmane.io" Cc: =?iso-8859-1?Q?Jo=E3o_T=E1vora?= , Gerd =?iso-8859-1?Q?M=F6llmann?= , Richard Stallman , paaguti@gmail.com, emacs-devel@gnu.org To: Jim Porter Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Fri Nov 10 11:04:12 2023 Return-path: Envelope-to: ged-emacs-devel@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 1r1ON2-0008bx-Is for ged-emacs-devel@m.gmane-mx.org; Fri, 10 Nov 2023 11:04:12 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1r1OMt-0001Dg-8N; Fri, 10 Nov 2023 05:04:03 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1r1OMr-0001CR-Jx for emacs-devel@gnu.org; Fri, 10 Nov 2023 05:04:01 -0500 Original-Received: from mail.muc.de ([193.149.48.3]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1r1OMh-0003pQ-NA for emacs-devel@gnu.org; Fri, 10 Nov 2023 05:04:01 -0500 Original-Received: (qmail 89325 invoked by uid 3782); 10 Nov 2023 11:03:49 +0100 Original-Received: from acm.muc.de (p4fe158a9.dip0.t-ipconnect.de [79.225.88.169]) (using STARTTLS) by colin.muc.de (tmda-ofmipd) with ESMTP; Fri, 10 Nov 2023 11:03:49 +0100 Original-Received: (qmail 4409 invoked by uid 1000); 10 Nov 2023 10:03:48 -0000 Content-Disposition: inline In-Reply-To: <656f8d5f-2850-062c-1b38-3b50367c64d5@gmail.com> X-Submission-Agent: TMDA/1.3.x (Ph3nix) X-Primary-Address: acm@muc.de Received-SPF: pass client-ip=193.149.48.3; envelope-from=acm@muc.de; helo=mail.muc.de X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 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-mx.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.devel:312467 Archived-At: Hello, Jim. On Thu, Nov 09, 2023 at 15:49:01 -0800, Jim Porter wrote: > On 11/9/2023 1:20 PM, João Távora wrote: > > Examples could be an implementation of lazy sequences > > for example. So it stands to reason that there's no (obvious) reason > > to preload seq.el, > In fact, I was considering adding support to seq.el for generators, > which we could consider a kind of lazy sequence. I'm not entirely sure I > *need* it yet, but it could make a few things in Eshell easier. Please don't. This would be yet one more unnecessary complicated abstraction for which future maintainers would curse you for introducing. I don't know what a "generator" is, exactly, but it would likely involve a plethora of backticks, funcalls, generic functions, and the like, all things which make debugging difficult, if not very difficult. The Subject: line of this thread mentions complexity. This is something we should be trying to reduce in Emacs, not increase. [ .... ] -- Alan Mackenzie (Nuremberg, Germany).