From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Jean Louis Newsgroups: gmane.emacs.help Subject: Re: How to avoid compiler warning `unused lexical variable' for `dolist' or `dotimes'? Date: Fri, 8 Jan 2021 04:02:35 +0300 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="30254"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Mutt/2.0 (3d08634) (2020-11-07) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Fri Jan 08 02:05:04 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 1kxgDA-0007lZ-Eg for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 08 Jan 2021 02:05:04 +0100 Original-Received: from localhost ([::1]:48644 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kxgD9-0004LY-HH for geh-help-gnu-emacs@m.gmane-mx.org; Thu, 07 Jan 2021 20:05:03 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:46196) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kxgBi-0003fY-Ek for help-gnu-emacs@gnu.org; Thu, 07 Jan 2021 20:03:34 -0500 Original-Received: from stw1.rcdrun.com ([217.170.207.13]:33003) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kxgBg-0001zV-Sv for help-gnu-emacs@gnu.org; Thu, 07 Jan 2021 20:03:34 -0500 Original-Received: from localhost ([::ffff:41.210.145.49]) (AUTH: PLAIN securesender, TLS: TLS1.2,256bits,ECDHE_RSA_AES_256_GCM_SHA384) by stw1.rcdrun.com with ESMTPSA id 0000000000295441.000000005FF7AF63.000032A9; Thu, 07 Jan 2021 18:03:31 -0700 Mail-Followup-To: help-gnu-emacs@gnu.org Content-Disposition: inline In-Reply-To: Received-SPF: pass client-ip=217.170.207.13; envelope-from=bugs@gnu.support; helo=stw1.rcdrun.com 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 autolearn=ham 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:127066 Archived-At: * Stefan Monnier [2021-01-07 18:37]: > > What is proper way to avoid this warning in `dolist' or `dotimes': > > rcd-db.el:841:1: Warning: Unused lexical variable ‘i’ > > Same as for any other place where you might declare a variable that you > don't actually use: make sure the var's name starts with an underscore. > This tells the compiler that you're aware of the fact the var is not > used (but still want this variable there for some reason; e.g. in > dotimes and dolist you don't have the choice not to put a variable > there). > > Traditionally for `dotimes`, I'd then use `_` as the variable name > unless I really want to give a hint to the reader about what kind of > things I'm counting like (dotimes (_column-nb ...) ...). That also sounds like workaround around the real problem. In `dotimes' I do use the VAR counted. It is not same as (let ((_ (execute some program without))))