From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Emanuel Berg Newsgroups: gmane.emacs.help Subject: Re: Easy to add with push but not to the end of a list Date: Sun, 08 Jan 2023 05:40:59 +0100 Message-ID: <87358labac.fsf@dataswamp.org> References: <877czcid1d.fsf@web.de> <87a648kzov.fsf@dataswamp.org> <87cz93noqc.fsf@web.de> <87zgc76npf.fsf@dataswamp.org> <87k038npls.fsf@web.de> <87sfht8luq.fsf@dataswamp.org> <87h6y91ffg.fsf@web.de> <878rjlgvdd.fsf@dataswamp.org> <87bkoh1dix.fsf@web.de> <87wn75fdkx.fsf@dataswamp.org> <87bkog30ry.fsf@web.de> <87pmcwcghm.fsf@dataswamp.org> <87zgbxo5c8.fsf@web.de> <874jtfqe60.fsf@dataswamp.org> <87y1qnfr3g.fsf@web.de> <87358vdy3i.fsf@dataswamp.org> <87sfgufo0w.fsf@web.de> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="21574"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:TiQtb+qcVKZ0ziqUecakEnnS+wU= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Sun Jan 08 19:11:57 2023 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 1pEa9F-0005NH-1J for geh-help-gnu-emacs@m.gmane-mx.org; Sun, 08 Jan 2023 19:11:57 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pEa8y-0008DC-2b; Sun, 08 Jan 2023 13:11:40 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pENYQ-0003tA-9e for help-gnu-emacs@gnu.org; Sat, 07 Jan 2023 23:45:06 -0500 Original-Received: from ciao.gmane.io ([116.202.254.214]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pENYO-0000GE-CF for help-gnu-emacs@gnu.org; Sat, 07 Jan 2023 23:45:06 -0500 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1pENYL-0004CX-UG for help-gnu-emacs@gnu.org; Sun, 08 Jan 2023 05:45:01 +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: -15 X-Spam_score: -1.6 X-Spam_bar: - X-Spam_report: (-1.6 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.25, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Sun, 08 Jan 2023 13:11:28 -0500 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-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.help:142158 Archived-At: Michael Heerdegen wrote: >> (defmacro pushlast (newelt place) >> (declare (debug (form gv-place))) >> (if (symbolp place) >> (list 'setq place >> (list 'append place (list 'cons newelt nil)) ) >> (macroexp-let2 macroexp-copyable-p x newelt >> (gv-letplace (getter setter) place >> (funcall setter `(append ,getter (cons ,x nil))) )))) > > LGTM. But you can skip the special treatment of the simple > (symbolp place) case since your macro is not used > while bootstrapping. Let's get that money! ;;; -*- lexical-binding: t -*- ;; ;; this file: ;; https://dataswamp.org/~incal/emacs-init/list.el (defmacro pushlast (newelt place) (declare (debug (form gv-place))) (macroexp-let2 macroexp-copyable-p x newelt (gv-letplace (getter setter) place (funcall setter `(append ,getter (cons ,x nil))) ))) -- underground experts united https://dataswamp.org/~incal