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: eval-when-compile help? Date: Tue, 05 Oct 2021 15:53:06 -0400 Message-ID: References: <8e532f35-729d-ed5a-c4f4-85e2d011c8eb@yandex.ru> <7972b0e8-6cfe-e53f-f102-039729210cb3@yandex.ru> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="8163"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) Cc: emacs-devel@gnu.org To: Dmitry Gutov Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Tue Oct 05 21:55:19 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 1mXqX0-0001wB-UX for ged-emacs-devel@m.gmane-mx.org; Tue, 05 Oct 2021 21:55:19 +0200 Original-Received: from localhost ([::1]:46942 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mXqWz-0003eS-U0 for ged-emacs-devel@m.gmane-mx.org; Tue, 05 Oct 2021 15:55:17 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:49468) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mXqVk-0001Uz-6M for emacs-devel@gnu.org; Tue, 05 Oct 2021 15:54:00 -0400 Original-Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:45237) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mXqVh-0006sG-Ig for emacs-devel@gnu.org; Tue, 05 Oct 2021 15:53:59 -0400 Original-Received: from pmg1.iro.umontreal.ca (localhost.localdomain [127.0.0.1]) by pmg1.iro.umontreal.ca (Proxmox) with ESMTP id 8FA461003ED; Tue, 5 Oct 2021 15:53:55 -0400 (EDT) Original-Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg1.iro.umontreal.ca (Proxmox) with ESMTP id 4323710012B; Tue, 5 Oct 2021 15:53:54 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1633463634; bh=rAncQ60X/Ie+IG0gouAs41whu+8fG0+/eJMSEv/Y35E=; h=From:To:Cc:Subject:References:Date:In-Reply-To:From; b=TZpei0e93CkJ8tzjxaIWDMD3YaaTDp6mY+CC5cuzzvbHCJ8gqGqnyNvpgRqqYAHk5 X4xiH4vDJeyR9Q6kM0VXD8+pWHvY+gmiKg6xpg4Afk2RAXf0tBedzLH4MRwGAS3Wlc CSCPqSePRZySXHAssfHpdk7/GVvSF1UYE24xNGOll+FB+F1lULqZzGGc4mG6lSyVDf TGJsX0gv2jF/IBlS4HqogPuBh0AwhfoqSWa+I7dSj1Jw78cn9S7qKVw1WtgMFy211s sit/gCQ5c7aKqywpZSdZVqoiDep5VxgbC3+JOu7lV1FNnq98bfOFXaswpPwS/iGyOv earDiICfG5B5w== Original-Received: from alfajor (lechon.iro.umontreal.ca [132.204.27.242]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id 2F9281202E4; Tue, 5 Oct 2021 15:53:54 -0400 (EDT) In-Reply-To: (Dmitry Gutov's message of "Tue, 5 Oct 2021 19:22:50 +0300") 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:276382 Archived-At: >> BTW, maybe a better option is to use a macro like: >> (defmacro if-when-compile (test then else) >> (if (eval test t) then else)) >> and then do >> (if-when-compile (version< emacs-version "28") >> (progn >> (require 'eieio) >> (defclass xref-location () () >> :documentation >> "(Obsolete) location represents a position in a file or buffer."))) > > That gives me > > Wrong number of arguments: (3 . 3), 2 ;-) > What would I put in the 'else' branch anyway? I was thinking of a generic `if-when-compile` which wouldn't be specific to this use (and `when-when-compile` sounds just odd ;-). Stefan