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: Q: BLV for function slots + BL obarray/hmap for symbol lookup? Date: Sat, 22 May 2021 18:30:07 -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="22708"; 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: Arthur Miller Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Sun May 23 00:31:40 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 1lka9j-0005hw-HE for ged-emacs-devel@m.gmane-mx.org; Sun, 23 May 2021 00:31:39 +0200 Original-Received: from localhost ([::1]:54122 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lka9h-0005HE-Oz for ged-emacs-devel@m.gmane-mx.org; Sat, 22 May 2021 18:31:37 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:54694) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lka8N-0004V7-Ub for emacs-devel@gnu.org; Sat, 22 May 2021 18:30:16 -0400 Original-Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:58542) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lka8K-0001oY-2e for emacs-devel@gnu.org; Sat, 22 May 2021 18:30:15 -0400 Original-Received: from pmg3.iro.umontreal.ca (localhost [127.0.0.1]) by pmg3.iro.umontreal.ca (Proxmox) with ESMTP id AD9224411A9; Sat, 22 May 2021 18:30:10 -0400 (EDT) Original-Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg3.iro.umontreal.ca (Proxmox) with ESMTP id 578EE44118D; Sat, 22 May 2021 18:30:09 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1621722609; bh=anO6HPqfvlnA9tcFJjdyNn7tHgZ7mKu3osgvRvujY0g=; h=From:To:Cc:Subject:References:Date:In-Reply-To:From; b=A7SXcilVxGjNah3FvxkQQ80RlWhATNk+1V3Pga+LL2N88xCEY90E5aQ3jfTEUi9go uFMYlsd3x1j8OLQhaqbqjxqfYCzbR4YsSptgV9GNuxRPK0Eyr9AivQ0PocZnZnMkoC 3YK0Vaiu3rvXDXGzP43OX1k1T3mC0VN0I1YIqM2IS3Cm6sYmxGrGbOhMA4zlzfliHi qk4eKKGkDqTdE+HiHpg5PJWCepVNxTFjjMkbVJJdqRcO9mBbgAyKeMoTJctrfEn3AS QS2IuGzOGqhU4WSTIdj+tN6eKi+M4qDb/gu2TshidbTjfpbzfqQ4I1HvhBZoscpMy5 0xK/0FycbgX7Q== Original-Received: from alfajor (69-196-163-239.dsl.teksavvy.com [69.196.163.239]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id E6FDC12055F; Sat, 22 May 2021 18:30:08 -0400 (EDT) In-Reply-To: (Arthur Miller's message of "Sat, 22 May 2021 23:46:22 +0200") 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:269632 Archived-At: > 1. Is there some special reason why BLV are implemented only for value > slots and not for function slots? Would it be inneficient, too > complicated, or just considered as not needed? 35 years of experience suggest it's not needed (thank god). It's quite easy to instead do something like (defun foo (..) (call foo-function ..)) and then use a buffer-local setting for `foo-function` to get the same result. > 2. Would it be possible, not too inneficient, complicated etc, if obarray > or hashmap, whichever is used for symbol lookup by Emacs, could be defined > as BLV, so that Emacs would lookup symbols similar as it does for buffer > local variables? 35 years of experience suggest it's not needed (thank god). Also, I think this could lead to quite unexpected semantics. Stefan