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.bugs Subject: bug#42147: 28.0.50; pure vs side-effect-free, missing optimizations? Date: Wed, 29 Jul 2020 10:28:30 -0400 Message-ID: References: <3A9CC2A3-8307-47B2-8D80-795C0AF020E1@acm.org> <0433A879-C98D-4B1A-B85C-A15DA9289099@acm.org> <1621669100.2102667.1593639091621@mail.yahoo.com> <33C2E2C8-16A6-47A9-B3A4-8A5F43648E04@acm.org> <51FE77F3-CA05-459A-9601-9E1EEBC1E2FE@acm.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="20201"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) Cc: Mattias =?UTF-8?Q?Engdeg=C3=A5rd?= , Paul Eggert , Andrea Corallo , 42147@debbugs.gnu.org To: Philipp Stephani Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Wed Jul 29 16:29:22 2020 Return-path: Envelope-to: geb-bug-gnu-emacs@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 1k0n58-00057b-0N for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 29 Jul 2020 16:29:22 +0200 Original-Received: from localhost ([::1]:35666 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1k0n57-00056B-1H for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 29 Jul 2020 10:29:21 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:58958) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1k0n4o-0004qA-1l for bug-gnu-emacs@gnu.org; Wed, 29 Jul 2020 10:29:02 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:50136) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1k0n4n-0001oT-OY for bug-gnu-emacs@gnu.org; Wed, 29 Jul 2020 10:29:01 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1k0n4n-0002H1-LI for bug-gnu-emacs@gnu.org; Wed, 29 Jul 2020 10:29:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Stefan Monnier Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Wed, 29 Jul 2020 14:29:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 42147 X-GNU-PR-Package: emacs Original-Received: via spool by 42147-submit@debbugs.gnu.org id=B42147.15960329248716 (code B ref 42147); Wed, 29 Jul 2020 14:29:01 +0000 Original-Received: (at 42147) by debbugs.gnu.org; 29 Jul 2020 14:28:44 +0000 Original-Received: from localhost ([127.0.0.1]:33449 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1k0n4W-0002GW-1H for submit@debbugs.gnu.org; Wed, 29 Jul 2020 10:28:44 -0400 Original-Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:54136) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1k0n4U-0002GL-LZ for 42147@debbugs.gnu.org; Wed, 29 Jul 2020 10:28:43 -0400 Original-Received: from pmg3.iro.umontreal.ca (localhost [127.0.0.1]) by pmg3.iro.umontreal.ca (Proxmox) with ESMTP id 4EDE0440918; Wed, 29 Jul 2020 10:28:37 -0400 (EDT) Original-Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg3.iro.umontreal.ca (Proxmox) with ESMTP id BAE54440771; Wed, 29 Jul 2020 10:28:31 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1596032911; bh=7SIqdEH21myh2iKhEMfcL4HeEarzOFK9SntjoEYAW4o=; h=From:To:Cc:Subject:References:Date:In-Reply-To:From; b=XGcxQzgZNmZHj4MvPphEyycuWt5FarlyQptSV71QO2hCfyFR7W9b9Gz7RYhnVhaML odLb00W50+Q5bKNxnPRHjd0YEzoDlzdnmjfmW5vpPPdNZHeuZThCQNymDHj9CQRRfB 6z6eluEKaq4K+CsVTvgComlOVgW5/ZxRrFBv+AuIvjEA/kaoZoKFgAS8HDBIBTH1yf 2uDCtzVU3850XEImXSbvr8WK40frR/dTfQEXkKc5XTHI8jMMGkwDvpli3/LyhaMqIz /Sh0gLV0zpJx7MDaIAyL+RhMO4gneqnEAKWL6O3jGtmO9/bBigw2qlzE0d7bh3xuB5 gSmFe+uqERlGw== Original-Received: from milanesa (unknown [45.72.246.108]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id 33E82120225; Wed, 29 Jul 2020 10:28:31 -0400 (EDT) In-Reply-To: (Philipp Stephani's message of "Wed, 29 Jul 2020 14:53:55 +0200") X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:183661 Archived-At: >> > I wouldn't know about side effects, but `kbd' is definitely not pure >> > by the "homomorphism w.r.t. eql" definition as it takes a string >> > argument. >> Taking string arguments is not a problem (`eql` strings are also `equal`). > Only if the strings aren't modified between two invocations. Indeed, you're right. In practice this is not a problem, for all kinds of circumstantial reasons, but in theory you're quite right. Stefan