From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: About `--' (was Re: filenotify.el) Date: Fri, 28 Jun 2013 18:54:04 -0400 Message-ID: References: <87d2ra9z4x.fsf@gmx.de> <1383316.4Bc292dOgY@descartes> <87vc52yq04.fsf@gmx.de> <4199085.Bycd8r9Vun@descartes> <8761x12x4k.fsf@gmx.de> <878v1x71lb.fsf_-_@rosalinde.fritz.box> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1372460050 18724 80.91.229.3 (28 Jun 2013 22:54:10 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 28 Jun 2013 22:54:10 +0000 (UTC) Cc: =?iso-8859-1?Q?R=FCdiger?= Sonderfeld , Josh , Stephen Berman , Michael Albinus , emacs-devel To: Xue Fuqiao Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sat Jun 29 00:54:10 2013 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1UshYP-0005hA-VV for ged-emacs-devel@m.gmane.org; Sat, 29 Jun 2013 00:54:10 +0200 Original-Received: from localhost ([::1]:44613 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UshYP-0004NY-M9 for ged-emacs-devel@m.gmane.org; Fri, 28 Jun 2013 18:54:09 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:46923) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UshYM-0004NQ-K7 for emacs-devel@gnu.org; Fri, 28 Jun 2013 18:54:08 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1UshYL-0007te-PI for emacs-devel@gnu.org; Fri, 28 Jun 2013 18:54:06 -0400 Original-Received: from ironport2-out.teksavvy.com ([206.248.154.182]:52803) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UshYL-0007tZ-L4 for emacs-devel@gnu.org; Fri, 28 Jun 2013 18:54:05 -0400 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: Av4EABK/CFFMCppA/2dsb2JhbABEvw4Xc4IeAQEEAVYjBQsLDiYSFBgNJIgeBsEtkQoDpHqBXoMT X-IPAS-Result: Av4EABK/CFFMCppA/2dsb2JhbABEvw4Xc4IeAQEEAVYjBQsLDiYSFBgNJIgeBsEtkQoDpHqBXoMT X-IronPort-AV: E=Sophos;i="4.84,565,1355115600"; d="scan'208";a="17417006" Original-Received: from 76-10-154-64.dsl.teksavvy.com (HELO fmsmemgm.homelinux.net) ([76.10.154.64]) by ironport2-out.teksavvy.com with ESMTP/TLS/ADH-AES256-SHA; 28 Jun 2013 18:53:59 -0400 Original-Received: by fmsmemgm.homelinux.net (Postfix, from userid 20848) id A8ED8AE2E1; Fri, 28 Jun 2013 18:54:04 -0400 (EDT) In-Reply-To: (Xue Fuqiao's message of "Fri, 28 Jun 2013 11:00:35 +0800") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux) X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 206.248.154.182 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.14 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-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:161256 Archived-At: > Agreed. XOR is also an example. Some generally useful features have > been added to core Emacs Lisp recently (e.g., generalized variables), Notice that these are language features, whereas powerset is in a different category of "occasionally useful library function". We sadly don't have a good place to put such generic functions. Maybe we could create a new "set" library of set functions (union, intersection, difference, powerset, membership, negation, ...). Stefan