From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Richard Stallman Newsgroups: gmane.emacs.devel Subject: Re: pure-fns in byte-opt.el Date: Mon, 25 Sep 2017 18:06:07 -0400 Message-ID: References: <20170725020650.GA12601@holos.localdomain> Reply-To: rms@gnu.org NNTP-Posting-Host: blaine.gmane.org Content-Type: text/plain; charset=Utf-8 X-Trace: blaine.gmane.org 1506377218 1603 195.159.176.226 (25 Sep 2017 22:06:58 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Mon, 25 Sep 2017 22:06:58 +0000 (UTC) Cc: emacs-devel@gnu.org To: Stefan Monnier Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Tue Sep 26 00:06:53 2017 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dwbWe-0008UO-Kw for ged-emacs-devel@m.gmane.org; Tue, 26 Sep 2017 00:06:52 +0200 Original-Received: from localhost ([::1]:44500 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dwbWl-0003Oi-RF for ged-emacs-devel@m.gmane.org; Mon, 25 Sep 2017 18:06:59 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:52308) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dwbW0-0003OR-Hr for emacs-devel@gnu.org; Mon, 25 Sep 2017 18:06:13 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dwbVz-0001aM-KO for emacs-devel@gnu.org; Mon, 25 Sep 2017 18:06:12 -0400 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:47708) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dwbVv-0001Z2-EC; Mon, 25 Sep 2017 18:06:07 -0400 Original-Received: from rms by fencepost.gnu.org with local (Exim 4.82) (envelope-from ) id 1dwbVv-0002Dg-0o; Mon, 25 Sep 2017 18:06:07 -0400 In-reply-to: (message from Stefan Monnier on Sun, 24 Sep 2017 12:23:29 -0400) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 2001:4830:134:3::e X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 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.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:218785 Archived-At: [[[ To any NSA and FBI agents reading my email: please consider ]]] [[[ whether defending the US Constitution against all enemies, ]]] [[[ foreign or domestic, requires you to follow Snowden's example. ]]] > pure: like side-effect-free but additionally, the function always > returns the same value when called with the same arguments, so the > compiler can precompute the call if it knows the arguments. It may be necessary to define "same" more precisely. Does it mean equal? eq? -- Dr Richard Stallman President, Free Software Foundation (gnu.org, fsf.org) Internet Hall-of-Famer (internethalloffame.org) Skype: No way! See stallman.org/skype.html.