From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: bignum branch Date: Fri, 20 Jul 2018 17:48:17 -0400 Message-ID: References: <87o9fbbw1t.fsf@tromey.com> <83k1pt7q1e.fsf@gnu.org> <83h8kx7oeu.fsf@gnu.org> <83fu0h7nr6.fsf@gnu.org> <83d0vl7kg2.fsf@gnu.org> <4bc2a6ba-bc73-c4a9-f7a6-20303955bc7f@cs.ucla.edu> <838t696zb2.fsf@gnu.org> <5095f6d2-c8c1-8d9b-4f4f-ccb74a68d58e@cs.ucla.edu> <8547e501-a41f-68eb-6e00-5fed6c593da4@gmail.com> <73e5dd79-d7d5-3bec-f991-04ceb5d3472d@gmail.com> <87o9f45ot8.fsf@Rainer.invalid> <447774de-c305-5478-1438-7794344456d4@cs.ucla.edu> <87muuly8sv.fsf@Rainer.invalid> <1d462611-72f7-f4b8-8a62-56c97379b6f7@cs.ucla.edu> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1532123195 25952 195.159.176.226 (20 Jul 2018 21:46:35 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Fri, 20 Jul 2018 21:46:35 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Fri Jul 20 23:46:31 2018 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 1fgdEM-0006es-AT for ged-emacs-devel@m.gmane.org; Fri, 20 Jul 2018 23:46:30 +0200 Original-Received: from localhost ([::1]:49928 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fgdGT-0001Zo-2v for ged-emacs-devel@m.gmane.org; Fri, 20 Jul 2018 17:48:41 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:44107) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fgdGM-0001ZW-4V for emacs-devel@gnu.org; Fri, 20 Jul 2018 17:48:34 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fgdGH-0004vM-5p for emacs-devel@gnu.org; Fri, 20 Jul 2018 17:48:34 -0400 Original-Received: from [195.159.176.226] (port=55187 helo=blaine.gmane.org) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1fgdGG-0004uC-TM for emacs-devel@gnu.org; Fri, 20 Jul 2018 17:48:29 -0400 Original-Received: from list by blaine.gmane.org with local (Exim 4.84_2) (envelope-from ) id 1fgdE4-0006Oz-Aq for emacs-devel@gnu.org; Fri, 20 Jul 2018 23:46:12 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 14 Original-X-Complaints-To: usenet@blaine.gmane.org Cancel-Lock: sha1:IwmzBbNPhU6lDYCbCTKgWr8aW48= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 195.159.176.226 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:227597 Archived-At: > - doc: /* Return t if the two args are the same Lisp object. > -Floating-point numbers of equal value are `eql', but they may not be `eq'. */) > + doc: /* Return t if the two args are `eq' or are indistinguishable numbers. > +Floating-point values with the same sign, exponent and fraction are `eql'. > +This differs from numeric comparison: (eql 0.0 -0.0) returns nil and > +\(eql 0.0e+NaN 0.0e+NaN) returns t, whereas `=' does the opposite. */) Interestingly, if we change EQ to do the comparison currently performed by `eql`, then `eql` is easier to document since "indistinguishable" becomes closer to the truth (currently you can distinguish two `eql` numbers by resorting to `eq`). Stefan