From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: defmacro with built-in gensym declaration and initialization Date: Wed, 20 Jan 2021 10:09:53 -0500 Message-ID: References: <87bldk6n2l.fsf@gmail.com> <87turbiuvr.fsf@tcd.ie> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="2651"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) Cc: akater , emacs-devel@gnu.org To: "Basil L. Contovounesios" Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Wed Jan 20 16:10:52 2021 Return-path: Envelope-to: ged-emacs-devel@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 1l2F8G-0000Xn-6s for ged-emacs-devel@m.gmane-mx.org; Wed, 20 Jan 2021 16:10:52 +0100 Original-Received: from localhost ([::1]:33352 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1l2F8F-0006CJ-8Z for ged-emacs-devel@m.gmane-mx.org; Wed, 20 Jan 2021 10:10:51 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:41546) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l2F7P-0005eG-Vr for emacs-devel@gnu.org; Wed, 20 Jan 2021 10:10:00 -0500 Original-Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:43154) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l2F7N-0004p5-L2 for emacs-devel@gnu.org; Wed, 20 Jan 2021 10:09:59 -0500 Original-Received: from pmg2.iro.umontreal.ca (localhost.localdomain [127.0.0.1]) by pmg2.iro.umontreal.ca (Proxmox) with ESMTP id 6836D80ACD; Wed, 20 Jan 2021 10:09:56 -0500 (EST) Original-Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg2.iro.umontreal.ca (Proxmox) with ESMTP id ECB9F80272; Wed, 20 Jan 2021 10:09:54 -0500 (EST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1611155394; bh=oiTvOQeP2C5TE9EsK5/DOumNZmbks0u6xN2t28UqfHA=; h=From:To:Cc:Subject:References:Date:In-Reply-To:From; b=M2Y2KgOkdonRMiXz+2xnRwRsC9qG5BIHe/pOra9Pjr3DTz9cXQ5CwH+6Ipd2z2l7w 14JQQQKroL634fhzrCN+wQGjyzyj0bi3oFcdZ7k4+MDjm9iaASVlHpdZcnv/s3nHJd cAFjfkoaXTSaur73mX8bBrW8gbfAIaOGdfmQ1KUU9MYAKT3wIitrBBIxOt0JXElxVB 0MG9o3ObkXUHtALyu2aNUCYs21pLcaSU0YPwAzlIOkUiAqGd5nfKRXRTvMlxtzZRVJ /3+3RBGRTN9DgsUztJzTKK2TVRBY9JEFVaeRroMqrHjBgyn3iwjnCpCMAAxUiz7Vt7 8vhGxjVqowaqQ== Original-Received: from alfajor (unknown [45.72.224.181]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id 854E4120164; Wed, 20 Jan 2021 10:09:54 -0500 (EST) In-Reply-To: <87turbiuvr.fsf@tcd.ie> (Basil L. Contovounesios's message of "Wed, 20 Jan 2021 13:46:16 +0000") Received-SPF: pass client-ip=132.204.25.50; envelope-from=monnier@iro.umontreal.ca; helo=mailscanner.iro.umontreal.ca X-Spam_score_int: -42 X-Spam_score: -4.3 X-Spam_bar: ---- X-Spam_report: (-4.3 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:263206 Archived-At: > IMO, this minor convenience is insufficient motivation for > conflating/complicating a macro's global arglist, i.e. its arity, > calling convention, etc., with utilities for its local body. Is there > some other motivation? Am I missing something? Agreed. This is like the hideous `&aux` of Common Lisp. > Why not provide handy gensym/once-only local conveniences for macro > authors instead (some of which already exist in one form or another, > e.g. macroexp-let2, inline-letevals, and org-with-gensyms)? Indeed, `macroexp-let2` was designed for similar situations. I'm not completely happy with it either, so if someone can design something better, that'd be welcome, Stefan