From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Sean Whitton Newsgroups: gmane.emacs.devel Subject: Re: [PATCH] Adding with-gensyms and once-only to subr-x Date: Mon, 11 Apr 2022 10:01:09 -0700 Message-ID: <877d7vr1uy.fsf@athena.silentflame.com> References: <87a6crr3gj.fsf@athena.silentflame.com> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="35630"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Emacs/29.0.50 (x86_64-pc-linux-gnu) Cc: emacs-devel@gnu.org To: Stefan Monnier Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Mon Apr 11 19:13:21 2022 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 1ndxbL-00090v-Ik for ged-emacs-devel@m.gmane-mx.org; Mon, 11 Apr 2022 19:13:20 +0200 Original-Received: from localhost ([::1]:42920 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ndxbK-0001CV-9I for ged-emacs-devel@m.gmane-mx.org; Mon, 11 Apr 2022 13:13:18 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:46142) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ndxPg-0002UU-Uw for emacs-devel@gnu.org; Mon, 11 Apr 2022 13:01:17 -0400 Original-Received: from wout2-smtp.messagingengine.com ([64.147.123.25]:43151) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ndxPd-0005Br-2R for emacs-devel@gnu.org; Mon, 11 Apr 2022 13:01:15 -0400 Original-Received: from compute4.internal (compute4.nyi.internal [10.202.2.44]) by mailout.west.internal (Postfix) with ESMTP id 8AABB3201F24; Mon, 11 Apr 2022 13:01:11 -0400 (EDT) Original-Received: from mailfrontend2 ([10.202.2.163]) by compute4.internal (MEProxy); Mon, 11 Apr 2022 13:01:11 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=spwhitton.name; h=cc:cc:content-type:date:date:from:from:in-reply-to :in-reply-to:message-id:mime-version:references:reply-to:sender :subject:subject:to:to; s=fm3; t=1649696471; x=1649782871; bh=OW RuK2ALfA8iSHooTB7Jqe3Znn4/GXX7E2kpRkxYFDc=; b=ihbafjiDTpECeD1Fdp CxSK5PUN/JUkd1CBwhsH2wlSoiGw55PtHC8ZnUCSwzw+fo7uPuYXf+oSAKnZxAgJ kKpB3EsqM7zZN5AmPgDINwCeMugt0Z5nBbJc21jNr/gsLv+SGSyrmNiisT4xYn8L r3Bx5/RX2TCxvLWJUHQBmqwFDgu/jfkGqRhdeRRB85dghCkqrAcVVxQW5z7g0+tt d5Bs2Iuur2CB2MTx6kT/akajWcsvnynh46lX2HyCkqKmw2FuV9wNpm9Tut21Hgg8 5BfZjYvpjHuQyBcfO4ebDb5Kb3afWqSdu6CzTpM/GUpX8YTBLT0oeZJeo5cEErgu YEwg== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:cc:content-type:date:date:from:from :in-reply-to:in-reply-to:message-id:mime-version:references :reply-to:sender:subject:subject:to:to:x-me-proxy:x-me-proxy :x-me-sender:x-me-sender:x-sasl-enc; s=fm3; t=1649696471; x= 1649782871; bh=OWRuK2ALfA8iSHooTB7Jqe3Znn4/GXX7E2kpRkxYFDc=; b=K 2dakMMMuJcqUwBTTaHihPHrty7++imVUT0xVty7xoThfgoV5W5U3ZgNoX4c3ZWyo tjqJhxAczLh1yNQt70lhxQ1KSY/DZni+UnV1Icjxs3FzM3Cxg2G0o5yfKkM7pFXb yCDFfAd40Fp2+CWI5qfutnMrEcbTHijNNppR5O1jPpIlm8j+m3MWgWXYRProCtcC gQACtckPqZ9Yf1tpVgHi5hfDhryWtZYvDStI5F5lME+ddGp7E87hFr8LeoLbyBZu jCkbpYgd7n3DzV2Kh7doFJQGjrg25TbZuyEC9ACdYSsk2oZkWJ4B7VXDqo5i8D7S iwNgsKHmVGzPattHVFKcg== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvvddrudekiedguddtlecutefuodetggdotefrod ftvfcurfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfgh necuuegrihhlohhuthemuceftddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmd enucfjughrpefhvffujghffgffkfggtgesthdttddttdertdenucfhrhhomhepufgvrghn ucghhhhithhtohhnuceoshhpfihhihhtthhonhesshhpfihhihhtthhonhdrnhgrmhgvqe enucggtffrrghtthgvrhhnpeelgeeggfdvieejvdfhudfggeetgfekkeeuieeljeejhedu geegfeetgefhueffkeenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepmhgrih hlfhhrohhmpehsphifhhhithhtohhnsehsphifhhhithhtohhnrdhnrghmvg X-ME-Proxy: Original-Received: by mail.messagingengine.com (Postfix) with ESMTPA; Mon, 11 Apr 2022 13:01:10 -0400 (EDT) Original-Received: by athena.silentflame.com (Postfix, from userid 1000) id 9E9EC1B6529; Mon, 11 Apr 2022 17:01:09 +0000 (UTC) In-Reply-To: Received-SPF: pass client-ip=64.147.123.25; envelope-from=spwhitton@spwhitton.name; helo=wout2-smtp.messagingengine.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 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:288232 Archived-At: Hello, On Mon 11 Apr 2022 at 12:48pm -04, Stefan Monnier wrote: >> Lately I have been finding myself wanting with-gensyms and once-only, >> two classic macro-writing macros, available in core Elisp. (There is >> already org-with-gensyms, but it's not in the least bit Org-specific.) > > I think `once-only` is what we (well, I) called `macroexp-let2`. Ah, thank you for the pointer. (macroexp-let2* nil ((foo foo) (bar bar)) FORMS) is quite a bit more verbose than (once-only (foo bar) FORMS), however. So I would be inclined to keep once-only, though reimplemented in terms of macroexp-let2*. Does that sound reasonable? -- Sean Whitton