From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Michael Heerdegen Newsgroups: gmane.emacs.help Subject: Re: Easy to add with push but not to the end of a list Date: Sun, 01 Jan 2023 13:16:31 +0100 Message-ID: <87sfgufo0w.fsf@web.de> 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> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="29565"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:22h0cX9LB432Qsht9fXVKfbm9Ss= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Sun Jan 01 13:17:12 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 1pBxH5-0007QX-SL for geh-help-gnu-emacs@m.gmane-mx.org; Sun, 01 Jan 2023 13:17:11 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pBxGd-0006d9-6h; Sun, 01 Jan 2023 07:16:43 -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 1pBxGc-0006d1-9O for help-gnu-emacs@gnu.org; Sun, 01 Jan 2023 07:16:42 -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 1pBxGa-0000xg-Px for help-gnu-emacs@gnu.org; Sun, 01 Jan 2023 07:16:42 -0500 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1pBxGY-0006j5-BI for help-gnu-emacs@gnu.org; Sun, 01 Jan 2023 13:16:38 +0100 X-Injected-Via-Gmane: http://gmane.org/ 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: -13 X-Spam_score: -1.4 X-Spam_bar: - X-Spam_report: (-1.4 / 5.0 requ) BAYES_00=-1.9, FREEMAIL_FORGED_FROMDOMAIN=0.249, FREEMAIL_FROM=0.001, 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-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:142079 Archived-At: Emanuel Berg writes: > (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. Michael.