From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Barry Fishman Newsgroups: gmane.emacs.devel Subject: Re: 7 logical-xor implementations in source tree Date: Tue, 30 Jul 2019 10:25:33 -0400 Message-ID: <7n36iny4yq.fsf@ecube.ecubist.org> References: <87tvbd9a8p.fsf@oremacs.com> <87pnm14u95.fsf@tcd.ie> <87sgqvoz5c.fsf@tcd.ie> <87d0hz2e11.fsf@tcd.ie> <5B633129-B795-4BFA-AE81-FE9FD0A24CE9@acm.org> <0edfffbb-6f5a-a6b2-334a-9000e8f2eb3e@gmail.com> <20190728080417.GA5072@ACM> <875znm3q19.fsf@mbork.pl> <20190730093651.GA5427@ACM> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="117155"; mail-complaints-to="usenet@blaine.gmane.org" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.2 (gnu/linux) To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Tue Jul 30 16:26:12 2019 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1hsT4t-000UMr-Tr for ged-emacs-devel@m.gmane.org; Tue, 30 Jul 2019 16:26:12 +0200 Original-Received: from localhost ([::1]:33498 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hsT4s-0001jk-Vg for ged-emacs-devel@m.gmane.org; Tue, 30 Jul 2019 10:26:10 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:60901) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hsT4V-0001jS-I3 for emacs-devel@gnu.org; Tue, 30 Jul 2019 10:25:48 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hsT4U-0006XY-O9 for emacs-devel@gnu.org; Tue, 30 Jul 2019 10:25:47 -0400 Original-Received: from 195-159-176-226.customer.powertech.no ([195.159.176.226]:40948 helo=blaine.gmane.org) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hsT4U-0006Wk-Hn for emacs-devel@gnu.org; Tue, 30 Jul 2019 10:25:46 -0400 Original-Received: from list by blaine.gmane.org with local (Exim 4.89) (envelope-from ) id 1hsT4P-000Tnd-Q6 for emacs-devel@gnu.org; Tue, 30 Jul 2019 16:25:41 +0200 X-Injected-Via-Gmane: http://gmane.org/ Cancel-Lock: sha1:TTPXFOBqyQli9dHBYbZ+o++Q/bw= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 195.159.176.226 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.23 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.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:239033 Archived-At: On 2019-07-30 08:34:13 -04, Stefan Monnier wrote: >> Please do not add `iff' as a symbol under any circumstance. >> >> Short names must be universally understood by readers of the code with a >> wide range of expertise and experience. A short name must also be needed >> due to frequent use in typical code. This usage meets neither test. > > +1 I find the iff and xor not obvious. xor seems like it should be the bitwise operation. Why not something like bool-equal and bool-not-equal being better at conveying exactly what is going on. bool-eq and bool-ne is less clear, but shorter. With bool= and bool/=, the latter suffers from the dual use of / in symbols. -- Barry Fishman