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: none Date: Sat, 31 Jul 2021 12:22:59 -0400 Message-ID: References: <87y29rs48j.fsf@gmail.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="19052"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) Cc: emacs-devel To: Troy Hinckley Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Sat Jul 31 18:23:52 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 1m9rmC-0004mL-87 for ged-emacs-devel@m.gmane-mx.org; Sat, 31 Jul 2021 18:23:52 +0200 Original-Received: from localhost ([::1]:55406 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1m9rmB-00037F-51 for ged-emacs-devel@m.gmane-mx.org; Sat, 31 Jul 2021 12:23:51 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:56338) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m9rlb-0002SN-NL for emacs-devel@gnu.org; Sat, 31 Jul 2021 12:23:15 -0400 Original-Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:21243) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m9rlY-00088B-BS for emacs-devel@gnu.org; Sat, 31 Jul 2021 12:23:13 -0400 Original-Received: from pmg1.iro.umontreal.ca (localhost.localdomain [127.0.0.1]) by pmg1.iro.umontreal.ca (Proxmox) with ESMTP id 5C788100104; Sat, 31 Jul 2021 12:23:06 -0400 (EDT) Original-Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg1.iro.umontreal.ca (Proxmox) with ESMTP id AFD531001F3; Sat, 31 Jul 2021 12:23:00 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1627748580; bh=C4om/wlDIV6E4K+6vDW9iiG9TYh+tm5extgKFanEVXw=; h=From:To:Cc:Subject:References:Date:In-Reply-To:From; b=RCRI7cazYyWSyHqmqhSvJnLU7nBNvEqF3/dkEQmvC+MNNUllwe1yO9LWMSGUWMsJv P2xiSz/zfIytGSto7fKMB6UL2NYcAvy3EuLhBfMuaXtGDR7sQ0pAKKWXhOLFx58oUY YYDQsedj6oqDM2l2XLCWunzLQ6/NokHkmn2SYoNi1moLGHJSWESfVpLCpgc/EBVeva ptgmxnKQaPfSYBIxMwIF1INEY/j5U7Oi0e5ZnafdUasApaQalZ+qFIuICyvCiwD7nl pCJUiIhAdNf3q8a8LpBI5ODykrDh0/BKcSzhFrMpnbTB4hQTLOfJ4nYQfb9WDfMIl5 aaQIW3zCqpIkA== Original-Received: from alfajor (unknown [216.154.29.138]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id 7DC46120377; Sat, 31 Jul 2021 12:23:00 -0400 (EDT) In-Reply-To: (Troy Hinckley's message of "Fri, 30 Jul 2021 23:09:29 -0600") 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:271900 Archived-At: Troy Hinckley [2021-07-30 23:09:29] wrote: > byte-run.el does use backquotes > https://git.savannah.gnu.org/cgit/emacs.git/tree/lisp/emacs-lisp/byte-run.el#n122 > However I had not thought about the impacts of lazy evaluation. Right [except evaluation is not lazy, only macro-expansion is]. > I guess this would require that you load the code twice: First with > the interpreter, then with the byte compiler, since you can't compile > a macro that has not been defined. Indeed: we first load the interpreted code when dumping the `src/bootstrap-emacs` executable, which is then used to compile the preloaded files (and the compiler), after which we load them again (but in their compiled form) to dump the final `src/emacs` executable. Note that lazy macro-expansion is only used for some of the preloaded files (more specifically for those loaded before `macroexp.el` in `lisp/loadup.el`, where you can also see some hackish workaround we have to use at that time). Stefan