From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Andreas Schwab Newsgroups: gmane.emacs.devel Subject: Re: master 6ebce84ff2b: Use t for non-nil default values in boolean defcustom declarations Date: Sat, 29 Apr 2023 13:23:42 +0200 Message-ID: <87ttwz6if5.fsf@igel.home> References: <168268729579.28551.10245924430337302769@vcs2.savannah.gnu.org> <20230428130816.81449C22A07@vcs2.savannah.gnu.org> <87ildfxhlt.fsf@gmx.de> 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="24452"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Cc: emacs-devel@gnu.org, Mattias =?utf-8?Q?Engdeg=C3=A5rd?= To: Michael Albinus Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Sat Apr 29 13:24:40 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 1psigy-00066y-EV for ged-emacs-devel@m.gmane-mx.org; Sat, 29 Apr 2023 13:24:40 +0200 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1psigD-0003lh-8Y; Sat, 29 Apr 2023 07:23:53 -0400 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 1psigB-0003lQ-Vz for emacs-devel@gnu.org; Sat, 29 Apr 2023 07:23:52 -0400 Original-Received: from mail-out.m-online.net ([212.18.0.9]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1psig9-0001fz-V2 for emacs-devel@gnu.org; Sat, 29 Apr 2023 07:23:51 -0400 Original-Received: from frontend01.mail.m-online.net (unknown [192.168.8.182]) by mail-out.m-online.net (Postfix) with ESMTP id 4Q7nD045GQz1r1Mf; Sat, 29 Apr 2023 13:23:44 +0200 (CEST) Original-Received: from localhost (dynscan1.mnet-online.de [192.168.6.70]) by mail.m-online.net (Postfix) with ESMTP id 4Q7nD03c4Xz1qqlS; Sat, 29 Apr 2023 13:23:44 +0200 (CEST) X-Virus-Scanned: amavisd-new at mnet-online.de Original-Received: from mail.mnet-online.de ([192.168.8.182]) by localhost (dynscan1.mail.m-online.net [192.168.6.70]) (amavisd-new, port 10024) with ESMTP id oWD254zoN0yP; Sat, 29 Apr 2023 13:23:43 +0200 (CEST) X-Auth-Info: IkdAjTMEmjg9JTQoAEFkDrpxLfqknuWYXDYx8sL9WImKwTKNvbdOtqRSmTKiqt5c Original-Received: from igel.home (aftr-82-135-86-255.dynamic.mnet-online.de [82.135.86.255]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mail.mnet-online.de (Postfix) with ESMTPSA; Sat, 29 Apr 2023 13:23:43 +0200 (CEST) Original-Received: by igel.home (Postfix, from userid 1000) id 7914D2C1336; Sat, 29 Apr 2023 13:23:43 +0200 (CEST) In-Reply-To: <87ildfxhlt.fsf@gmx.de> (Michael Albinus's message of "Sat, 29 Apr 2023 09:39:10 +0200") X-Yow: Go on, EMOTE! I was RAISED on thought balloons!! Received-SPF: pass client-ip=212.18.0.9; envelope-from=whitebox@nefkom.net; helo=mail-out.m-online.net X-Spam_score_int: -23 X-Spam_score: -2.4 X-Spam_bar: -- X-Spam_report: (-2.4 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.25, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham 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:305718 Archived-At: On Apr 29 2023, Michael Albinus wrote: > Mattias Engdegård writes: > > Hi Mattias, > >> Use t for non-nil default values in boolean defcustom declarations >> >> +(defcustom viper-ms-style-os-p >> + (not (not (memq system-type '(ms-dos windows-nt)))) > > I'm just curious. Is there an advantage in using the (not (not ...)) > pattern? Logically, (not (null ...)) would fit better. (not is just an alias of null, so both are the same, of course). -- Andreas Schwab, schwab@linux-m68k.org GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1 "And now for something completely different."