From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Emanuel Berg via Users list for the GNU Emacs text editor Newsgroups: gmane.emacs.help Subject: Re: cl-lib questions Date: Thu, 22 Jul 2021 00:09:51 +0200 Message-ID: <875yx3uxn4.fsf@zoho.eu> References: <87sg1dgbbk.fsf@omarpolo.com> <87pmwhg843.fsf@omarpolo.com> <8735t96mxj.fsf@omarpolo.com> <87pmw961ox.fsf@zoho.eu> <874kcpxln9.fsf@logand.com> <87pmvcdgqg.fsf@t14.reltub.ca> <87a6mgwz17.fsf@logand.com> <87tukno4s8.fsf@t14.reltub.ca> <87mtqfuysy.fsf_-_@zoho.eu> Reply-To: Emanuel Berg Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="33043"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:6JzTBGyQH26ra9K8yNkd1Phn56k= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Thu Jul 22 00:10:59 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 1m6KQd-0008Mz-Bt for geh-help-gnu-emacs@m.gmane-mx.org; Thu, 22 Jul 2021 00:10:59 +0200 Original-Received: from localhost ([::1]:36792 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1m6KQb-0005Gq-SL for geh-help-gnu-emacs@m.gmane-mx.org; Wed, 21 Jul 2021 18:10:57 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:39856) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m6KPi-0005E5-9D for help-gnu-emacs@gnu.org; Wed, 21 Jul 2021 18:10:02 -0400 Original-Received: from ciao.gmane.io ([116.202.254.214]:38928) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m6KPg-0002Cz-Mu for help-gnu-emacs@gnu.org; Wed, 21 Jul 2021 18:10:01 -0400 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1m6KPe-00072E-C9 for help-gnu-emacs@gnu.org; Thu, 22 Jul 2021 00:09:58 +0200 X-Injected-Via-Gmane: http://gmane.org/ Mail-Followup-To: help-gnu-emacs@gnu.org Mail-Copies-To: never Received-SPF: pass client-ip=116.202.254.214; envelope-from=geh-help-gnu-emacs@m.gmane-mx.org; helo=ciao.gmane.io X-Spam_score_int: -16 X-Spam_score: -1.7 X-Spam_bar: - X-Spam_report: (-1.7 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.248, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action 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:131982 Archived-At: Stefan Monnier via Users list for the GNU Emacs text editor wrote: >> Can you perhaps say a couple of words on the intended use >> for `setf', I get it it is a generic function (macro) but >> is there in your mind say one or two typical use cases or >> something like that to exemplify? > > A typical example for me is when you want to modify the field of > a struct: > > (cl-defstruct my-foo a b c) > > then you can set the field `b` of a my-foo struct X to value V with: > > (setf (my-foo-b X) V) > > I also like to (ab)use it for things like > > (push (make-new-element) > (if (something) > x > y)) > >> Also, what is the difference between setf and `setq' with >> respect to setting `let'/`let*' variables? > > None. > >> Another cl-lib question is the type of clause usable with >> `cl-loop' that are described like this in the docstring: > > I wouldn't know, I never use `cl-loop`. OK, thanks! -- underground experts united https://dataswamp.org/~incal