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: FW: How to avoid compiler warning `unused lexical variable' for `dolist' or `dotimes'? Date: Fri, 8 Jan 2021 05:39:48 +0300 Message-ID: References: <87o8i1ou7m.fsf@zoho.eu> <0db0bc9d-7efb-4d3e-8462-545d0a5b25f5@default> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="8259"; 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 03:43:49 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 1kxhki-00024N-E9 for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 08 Jan 2021 03:43:48 +0100 Original-Received: from localhost ([::1]:51212 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kxhkh-0002Nq-EG for geh-help-gnu-emacs@m.gmane-mx.org; Thu, 07 Jan 2021 21:43:47 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:60744) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kxhkO-0002Nb-8G for help-gnu-emacs@gnu.org; Thu, 07 Jan 2021 21:43:28 -0500 Original-Received: from stw1.rcdrun.com ([217.170.207.13]:39473) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kxhkM-0002gI-Is for help-gnu-emacs@gnu.org; Thu, 07 Jan 2021 21:43:28 -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 0000000000295443.000000005FF7C6CC.0000490D; Thu, 07 Jan 2021 19:43:23 -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:127078 Archived-At: * Stefan Monnier [2021-01-08 05:31]: > > What we talk is return value in third place of `(dolist (first second > > third))' and it is strange that if return value is asked from `dolist' > > that then the `first' one is warned about. > > The third arg is different from "the expression after `dotimes`" in one > important respect: the third arg can refer to the iteration variable > which will contain the "last" value: > > (dotimes (i 10 i) nil) > > will return 10. > So the warning comes when you use that 3rd arg but without referring to > the iteration variable: in that case, you could have put the result > *after* `dotimes` rather than putting it in the 3rd arg. I did not understand it, show me example. Would that example remove compiler warning?