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: Do we need C's extern in Emacs Lisp? Date: Tue, 29 Mar 2022 17:09:10 -0400 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="20705"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) Cc: emacs-devel@gnu.org To: Alan Mackenzie Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Tue Mar 29 23:11:45 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 1nZJ7v-0005Cw-JA for ged-emacs-devel@m.gmane-mx.org; Tue, 29 Mar 2022 23:11:43 +0200 Original-Received: from localhost ([::1]:42632 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nZJ7u-0005TH-Ef for ged-emacs-devel@m.gmane-mx.org; Tue, 29 Mar 2022 17:11:42 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:48682) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nZJ5g-0002IX-9s for emacs-devel@gnu.org; Tue, 29 Mar 2022 17:09:24 -0400 Original-Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:51082) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nZJ5d-0005Qs-7S for emacs-devel@gnu.org; Tue, 29 Mar 2022 17:09:22 -0400 Original-Received: from pmg1.iro.umontreal.ca (localhost.localdomain [127.0.0.1]) by pmg1.iro.umontreal.ca (Proxmox) with ESMTP id CBF6310025F; Tue, 29 Mar 2022 17:09:14 -0400 (EDT) Original-Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg1.iro.umontreal.ca (Proxmox) with ESMTP id 4DDC410019F; Tue, 29 Mar 2022 17:09:13 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1648588153; bh=FKDligLetNUb+/BOm/xnBNOoyQaGMX064BsWsApH4Aw=; h=From:To:Cc:Subject:References:Date:In-Reply-To:From; b=lQuTpO8UvfqATcc/U5vqkXB9sQhi77DYN3yawSulDcKxUwRzZTag0ZkMPkJ94ggMD EgBa7ykNxXADQTdIAluTij5MIj0WvV1BnZW3vzxgmHeDPVIA2ZVNQ+RYMYJidWNfrA hJFdpa3of9qKMB6uYORAP/rIZlskwweAkPE55+84E4xRK3lg5EkUFMPkAWooayminl 11QQs8ItvQkaIAL3cuPeTFkzFLiR7V74umjYd9aIX+kwqhj5dK7yGE+9S0okWnD2Hy B4PpYEY5cyrIeDmsGMO67NXr+yWiG0cF21YQL7eJ/HFux02VOlS1/86DLEap+Grpu4 pFP0FvrEuZZPw== Original-Received: from ceviche (dyn.144-85-153-166.dsl.vtx.ch [144.85.153.166]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id 97B711204C0; Tue, 29 Mar 2022 17:09:12 -0400 (EDT) In-Reply-To: (Alan Mackenzie's message of "Tue, 29 Mar 2022 17:45:57 +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, 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:287568 Archived-At: > For example, if > > (defvar foo) > > is in a Lisp file, then subsequent use of foo will generate an unknown > variable warning. That's not my experience. Do you have a recipe? > For example(2), if in the Lisp file there is > > (declare-function foo nil) > > , this generates a warning when the function foo is later defined. I haven't verified that it's indeed the case, but it sounds likely, indeed. We could consider silencing this warning, but I wonder why you'd put such a `declare-function` in the same file where you define `foo`, since it's redundant anyway. Do you have a good use-case for it? Stefan