From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: =?utf-8?Q?Mattias_Engdeg=C3=A5rd?= Newsgroups: gmane.emacs.devel Subject: Re: 7 logical-xor implementations in source tree Date: Tue, 23 Jul 2019 11:14:42 +0200 Message-ID: <7AAB8009-DD68-4EA7-93CC-3B4A89FC8AFD@acm.org> References: <87tvbd9a8p.fsf@oremacs.com> <86wog9gn5n.fsf@gmail.com> Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="63139"; mail-complaints-to="usenet@blaine.gmane.org" Cc: emacs-devel@gnu.org To: Andy Moreton Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Tue Jul 23 11:14:58 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 1hpqsr-000GHM-OP for ged-emacs-devel@m.gmane.org; Tue, 23 Jul 2019 11:14:58 +0200 Original-Received: from localhost ([::1]:40506 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hpqsq-0007fl-5F for ged-emacs-devel@m.gmane.org; Tue, 23 Jul 2019 05:14:56 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:42866) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hpqsi-0007fd-Eg for emacs-devel@gnu.org; Tue, 23 Jul 2019 05:14:49 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hpqsh-0008Py-Gv for emacs-devel@gnu.org; Tue, 23 Jul 2019 05:14:48 -0400 Original-Received: from mail232c50.megamailservers.eu ([91.136.10.242]:50034 helo=mail37c50.megamailservers.eu) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hpqsh-0008Nb-4r for emacs-devel@gnu.org; Tue, 23 Jul 2019 05:14:47 -0400 X-Authenticated-User: mattiase@bredband.net DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=megamailservers.eu; s=maildub; t=1563873284; bh=4Pgs4s3pyb/DULBRhF3Am9tPoQOtt5Xi7RsA9oulXdY=; h=Subject:From:In-Reply-To:Date:Cc:References:To:From; b=GpJ6jBcQQgwGoC3XQpYQI3XR+kzTrC37geEdTc41hpTDlORpKn7Jk03nyT/cDhal8 NAv8fzeRY3oRqfNoQLW+00sXlsMrRC2G38PNiKHVOZ3Jr8SAwbAaWja8Dtnficn/+r CtoCiLpFoJvbNy8GhvXOHALJE0hYDjjDiso+38V8= Feedback-ID: mattiase@acm.or Original-Received: from [192.168.0.4] ([188.150.171.71]) (authenticated bits=0) by mail37c50.megamailservers.eu (8.14.9/8.13.1) with ESMTP id x6N9Eg3S027758; Tue, 23 Jul 2019 09:14:43 +0000 In-Reply-To: <86wog9gn5n.fsf@gmail.com> X-Mailer: Apple Mail (2.3445.104.11) X-CTCH-RefID: str=0001.0A0B0209.5D36D004.0047, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0 X-CTCH-VOD: Unknown X-CTCH-Spam: Unknown X-CTCH-Score: 0.000 X-CTCH-Flags: 0 X-CTCH-ScoreCust: 0.000 X-CSC: 0 X-CHA: v=2.3 cv=Mot8FVSe c=1 sm=1 tr=0 a=SF+I6pRkHZhrawxbOkkvaA==:117 a=SF+I6pRkHZhrawxbOkkvaA==:17 a=jpOVt7BSZ2e4Z31A5e1TngXxSK0=:19 a=IkcTkHD0fZMA:10 a=pGLkceISAAAA:8 a=F80AA_fiMm4uxheA6AgA:9 a=QEXdDO2ut3YA:10 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x (no timestamps) [generic] X-Received-From: 91.136.10.242 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:238828 Archived-At: 23 juli 2019 kl. 10.39 skrev Andy Moreton : >=20 > Is `logxor' what you are looking for ? Removing duplication would be > useful. Pretty sure he meant boolean (nil/non-nil) xor, not bitwise xor. Some na=C3=AFve suggestions: * Call it `xor', to go with `and' and `or' * Make it n-adic, taking at least 1 argument (since the operation has no = identity) * Make it a function, so that it can be used with `apply' etc. * Give it a compiler macro, for efficient partial application There is probably already something like this in CL, like everything = else.