From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.help Subject: Re: alist-get in Emacs 24? Date: Fri, 02 Oct 2015 09:37:50 -0400 Message-ID: References: <871tddvl08.fsf@mbork.pl> <877fn5hgg8.fsf@web.de> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1443796139 9835 80.91.229.3 (2 Oct 2015 14:28:59 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 2 Oct 2015 14:28:59 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Fri Oct 02 16:28:52 2015 Return-path: Envelope-to: geh-help-gnu-emacs@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 1Zi1KK-0000KL-S9 for geh-help-gnu-emacs@m.gmane.org; Fri, 02 Oct 2015 16:28:49 +0200 Original-Received: from localhost ([::1]:60387 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zi1KK-00030x-82 for geh-help-gnu-emacs@m.gmane.org; Fri, 02 Oct 2015 10:28:48 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:51466) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zi0XU-00041J-Ug for help-gnu-emacs@gnu.org; Fri, 02 Oct 2015 09:38:25 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Zi0XR-0004k5-KT for help-gnu-emacs@gnu.org; Fri, 02 Oct 2015 09:38:20 -0400 Original-Received: from plane.gmane.org ([80.91.229.3]:34891) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zi0XR-0004jy-DX for help-gnu-emacs@gnu.org; Fri, 02 Oct 2015 09:38:17 -0400 Original-Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1Zi0XD-0001dG-3m for help-gnu-emacs@gnu.org; Fri, 02 Oct 2015 15:38:08 +0200 Original-Received: from 69-196-161-8.dsl.teksavvy.com ([69.196.161.8]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 02 Oct 2015 15:37:58 +0200 Original-Received: from monnier by 69-196-161-8.dsl.teksavvy.com with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 02 Oct 2015 15:37:58 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 17 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: 69-196-161-8.dsl.teksavvy.com User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (gnu/linux) Cancel-Lock: sha1:0iaT88kbvLkexNFkXhheLfGt4z8= X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 80.91.229.3 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.14 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-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:107467 Archived-At: > There was assoc.el in prior Emacsen (and it's still lying around in > lisp/obsolete). `aput' is its setter for alists. Works great, but is > obsolete. "Works great" only if your needs are very modest. E.g. it's terribly inefficient, and it relies on dynamic scoping. As for the (gv-define-expander alist-get ...), you could just blindly copy that definition into your package. Of course that'll only work for Emacsen with gv.el. For older Emacsen, you'll have to use define-setf-expander, which indeed works a bit differently from gv-define-expander. For the very reason that I invented gv-define-expander, I'd rather not try and come up with the equivalent define-setf-expander. Stefan