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: Generic functions: Specializers like `or' or `memq'? Date: Thu, 04 Nov 2021 00:38:39 +0100 Message-ID: <87zgqkrerk.fsf@zoho.eu> References: <87r1bxcg6g.fsf@web.de> <87y265aymg.fsf@posteo.net> <87ilx9hrn6.fsf@web.de> <87a6ilorh0.fsf@ericabrahamsen.net> <877ddoj086.fsf@web.de> 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="28299"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:oqfD9BUQH/lWtYLX5XWBACFsiqg= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Thu Nov 04 00:40:32 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 1miPrr-00072M-TB for geh-help-gnu-emacs@m.gmane-mx.org; Thu, 04 Nov 2021 00:40:31 +0100 Original-Received: from localhost ([::1]:54570 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1miPrq-0005iS-FY for geh-help-gnu-emacs@m.gmane-mx.org; Wed, 03 Nov 2021 19:40:30 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:46828) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1miPqG-0005ht-2P for help-gnu-emacs@gnu.org; Wed, 03 Nov 2021 19:38:53 -0400 Original-Received: from ciao.gmane.io ([116.202.254.214]:43008) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1miPqD-0003CV-Bz for help-gnu-emacs@gnu.org; Wed, 03 Nov 2021 19:38:50 -0400 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1miPqA-00055i-SO for help-gnu-emacs@gnu.org; Thu, 04 Nov 2021 00:38:46 +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=0.249, 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: 2.1.29 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:134347 Archived-At: Michael Heerdegen wrote: >> Is anyone else's brain incapable of maintaining the >> distinction between "specializer" and "generalizer"? >> I cannot remember which is which, or exactly how they >> differ, and its one of the major obstacles to me actually >> reading and understanding cl-generic.el. > > The manual doesn't even mention the term "generalizer". > I don't have a clue. Is the term common in Common Lisp? > The implementation in cl-generic is hard to understand > without some previous knowledge. Word ... >From the `cl-generic-generalizers' docstring: It's called a generalizer because it takes a specific object and returns a more general approximation, denoting a set of objects to which it belongs. Think of the -er suffix, e.g. toaster. It is the thing that does things. Like MacGyver. A real man of action, right? -- underground experts united https://dataswamp.org/~incal