From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.help Subject: Re: "fall-through" generic function args plus &context Date: Mon, 26 Dec 2016 22:36:34 -0500 Message-ID: References: <87r34u8m55.fsf@ericabrahamsen.net> <87d1gexq6v.fsf@ericabrahamsen.net> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1482815250 1901 195.159.176.226 (27 Dec 2016 05:07:30 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Tue, 27 Dec 2016 05:07:30 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.1.50 (gnu/linux) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Tue Dec 27 06:07:25 2016 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cLjyn-0007c2-PK for geh-help-gnu-emacs@m.gmane.org; Tue, 27 Dec 2016 06:07:17 +0100 Original-Received: from localhost ([::1]:52766 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cLjys-00045L-Kr for geh-help-gnu-emacs@m.gmane.org; Tue, 27 Dec 2016 00:07:22 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:42725) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cLiZL-00036n-FN for help-gnu-emacs@gnu.org; Mon, 26 Dec 2016 22:36:56 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cLiZG-0004qa-If for help-gnu-emacs@gnu.org; Mon, 26 Dec 2016 22:36:55 -0500 Original-Received: from [195.159.176.226] (port=36959 helo=blaine.gmane.org) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1cLiZG-0004q0-Be for help-gnu-emacs@gnu.org; Mon, 26 Dec 2016 22:36:50 -0500 Original-Received: from list by blaine.gmane.org with local (Exim 4.84_2) (envelope-from ) id 1cLiZ5-0006Rp-7r for help-gnu-emacs@gnu.org; Tue, 27 Dec 2016 04:36:39 +0100 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 19 Original-X-Complaints-To: usenet@blaine.gmane.org Cancel-Lock: sha1:53QL9upvKsiHHFtuqmiNs1Ol0QU= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 195.159.176.226 X-Mailman-Approved-At: Tue, 27 Dec 2016 00:06:57 -0500 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.21 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.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.org gmane.emacs.help:112005 Archived-At: > Come to think of it, how does one override `cl-no-applicable-method' for > a specific generic? Good question. I guess in CLOS, this works by creating a new class that derives from the standard "generic function" class, then make your generic function be an instance of *that* class, at which point you can then define your `cl-no-applicable-method` method which specializes on the class of the `generic` argument. But currently cl-generic does not support this notion of "generic function" quite the way CLOS does (for one our "generic functions" objects are `defstruct` rather than `defclass` objects, and also they're not callable so the function cell is yet different (a fairly standard closure)). Stefan