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: How to avoid compiler warning `unused lexical variable' for `dolist' or `dotimes'? Date: Fri, 08 Jan 2021 03:21:31 +0100 Message-ID: <87eeiwnp78.fsf@zoho.eu> References: 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="34247"; 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:b+OpGseLyZ9TezoeMFViMNPZWa4= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Fri Jan 08 03:30:47 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 1kxhY6-0008om-6f for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 08 Jan 2021 03:30:46 +0100 Original-Received: from localhost ([::1]:47048 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kxhY5-00077i-8R for geh-help-gnu-emacs@m.gmane-mx.org; Thu, 07 Jan 2021 21:30:45 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:58526) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kxhXR-00077G-Ig for help-gnu-emacs@gnu.org; Thu, 07 Jan 2021 21:30:05 -0500 Original-Received: from ciao.gmane.io ([116.202.254.214]:49182) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kxhXP-0005rs-KB for help-gnu-emacs@gnu.org; Thu, 07 Jan 2021 21:30:05 -0500 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1kxhXO-00082F-8J for help-gnu-emacs@gnu.org; Fri, 08 Jan 2021 03:30:02 +0100 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:127074 Archived-At: Stefan Monnier wrote: > It's hidden because it's not at the usual place where the > return value is usually placed (i.e. in the last > expression). > > There are several other macros/specialforms that also place > the return value elsewhere than the last expression, such as > `unwind-protect`, (and to a lesser extent `if`, `cond`, > `condition-case`, `prog1`), but these still place the return > value in one of the immediate subexpressions, many of them > use indentation to try and make the return value "stand out" > from the rest, etc... > > In contrast in `dotimes` and `dolist` it's placed in > a sub-sub-expression and moreover it's one that's rarely > used (arguably *because* it's too deeply nested), so you're > likely to miss it if you don't go looking for it > very actively. > > Not that it matters anyway, It matters in the sense I just enjoyed reading that. -- underground experts united http://user.it.uu.se/~embe8573 https://dataswamp.org/~incal