From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Marcin Borkowski Newsgroups: gmane.emacs.devel Subject: Are "proper" closures used in Emacs sources? Date: Tue, 12 Jan 2021 14:50:24 +0100 Message-ID: <875z42s1r3.fsf@mbork.pl> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="985"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: mu4e 1.1.0; emacs 28.0.50 To: "emacs-devel@gnu.org" Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Tue Jan 12 15:29:14 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 1kzKfZ-00005S-KX for ged-emacs-devel@m.gmane-mx.org; Tue, 12 Jan 2021 15:29:13 +0100 Original-Received: from localhost ([::1]:40820 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kzKfY-0004Yi-La for ged-emacs-devel@m.gmane-mx.org; Tue, 12 Jan 2021 09:29:12 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:41142) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kzK4l-0007c4-7R for emacs-devel@gnu.org; Tue, 12 Jan 2021 08:51:11 -0500 Original-Received: from mail.mojserwer.eu ([195.110.48.8]:54686) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kzK4h-0007VW-J8 for emacs-devel@gnu.org; Tue, 12 Jan 2021 08:51:11 -0500 Original-Received: from localhost (localhost [127.0.0.1]) by mail.mojserwer.eu (Postfix) with ESMTP id 8D250E6707 for ; Tue, 12 Jan 2021 14:50:52 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at mail.mojserwer.eu Original-Received: from mail.mojserwer.eu ([127.0.0.1]) by localhost (mail.mojserwer.eu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id PkE22Tcgf4im for ; Tue, 12 Jan 2021 14:50:45 +0100 (CET) Original-Received: from localhost (83.8.194.24.ipv4.supernova.orange.pl [83.8.194.24]) by mail.mojserwer.eu (Postfix) with ESMTPSA id C8923E6258 for ; Tue, 12 Jan 2021 14:50:44 +0100 (CET) Received-SPF: pass client-ip=195.110.48.8; envelope-from=mbork@mbork.pl; helo=mail.mojserwer.eu X-Spam_score_int: -25 X-Spam_score: -2.6 X-Spam_bar: -- X-Spam_report: (-2.6 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Tue, 12 Jan 2021 09:28:04 -0500 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:262977 Archived-At: Hi all, it's been quite some time since lexical binding was introduced to Elisp. Apart from possible optimizations and being less error-prone, it allows for all the cool tricks with closures. Are there any places in Emacs core where "proper" closures are actually used? (By "proper", I mean closures with non-empty lexical environment, actually using said environment.) TIA, -- Marcin Borkowski http://mbork.pl