From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.bugs Subject: bug#8611: fixnum arithmetic should not wrap around Date: Tue, 03 May 2011 22:29:05 -0300 Message-ID: References: <4DC0491D.7090404@cs.ucla.edu> <4DC0A99E.3090706@cs.ucla.edu> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: dough.gmane.org 1304473024 28335 80.91.229.12 (4 May 2011 01:37:04 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Wed, 4 May 2011 01:37:04 +0000 (UTC) Cc: 8611@debbugs.gnu.org To: Paul Eggert Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Wed May 04 03:37:00 2011 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([140.186.70.17]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1QHR1P-0004eW-FQ for geb-bug-gnu-emacs@m.gmane.org; Wed, 04 May 2011 03:36:59 +0200 Original-Received: from localhost ([::1]:36445 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QHR1O-0008Cv-Q0 for geb-bug-gnu-emacs@m.gmane.org; Tue, 03 May 2011 21:36:58 -0400 Original-Received: from eggs.gnu.org ([140.186.70.92]:37161) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QHR1L-0008Ca-Lp for bug-gnu-emacs@gnu.org; Tue, 03 May 2011 21:36:56 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1QHR1K-0005uF-Rb for bug-gnu-emacs@gnu.org; Tue, 03 May 2011 21:36:55 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:33735) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QHR1K-0005uB-M8 for bug-gnu-emacs@gnu.org; Tue, 03 May 2011 21:36:54 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.69) (envelope-from ) id 1QHQuh-0002os-0s; Tue, 03 May 2011 21:30:03 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Stefan Monnier Original-Sender: debbugs-submit-bounces@debbugs.gnu.org Resent-To: owner@debbugs.gnu.org Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Wed, 04 May 2011 01:30:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 8611 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 8611-submit@debbugs.gnu.org id=B8611.130447255610774 (code B ref 8611); Wed, 04 May 2011 01:30:02 +0000 Original-Received: (at 8611) by debbugs.gnu.org; 4 May 2011 01:29:16 +0000 Original-Received: from localhost ([127.0.0.1] helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1QHQtv-0002nj-Vk for submit@debbugs.gnu.org; Tue, 03 May 2011 21:29:16 -0400 Original-Received: from fencepost.gnu.org ([140.186.70.10]) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1QHQtt-0002nW-J4 for 8611@debbugs.gnu.org; Tue, 03 May 2011 21:29:14 -0400 Original-Received: from 121-249-126-200.fibertel.com.ar ([200.126.249.121]:5299 helo=ceviche.home) by fencepost.gnu.org with esmtpsa (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1QHQto-0001kv-50; Tue, 03 May 2011 21:29:08 -0400 Original-Received: by ceviche.home (Postfix, from userid 20848) id 6EE7A662FC; Tue, 3 May 2011 22:29:05 -0300 (ART) In-Reply-To: <4DC0A99E.3090706@cs.ucla.edu> (Paul Eggert's message of "Tue, 03 May 2011 18:19:26 -0700") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.0.50 (gnu/linux) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list Resent-Date: Tue, 03 May 2011 21:30:03 -0400 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) X-Received-From: 140.186.70.43 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.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:46177 Archived-At: >> Using floats has only been introduced in order to handle things like >> file sizes larger than 4GB, i.e. the int-to-float conversion currently >> only ever happens for values that come from some C function. > Sorry, I don't follow. The Lisp reader currently sees "536870912" > and generates a float. How is that "some C function"? I guess "from outside of Elisp" is a better description than "from some C function". The Lisp reader brings values from outside Elisp into Elisp. > Would it be better to change Emacs to use bignums if available? Maybe. Other than Calc (and only if someone goes thorugh the trouble to port it to the new bignum primitives), I can't think of too many packages that would benefit, so it would seem to bring in a lot of extra code and complexity for little pay off. I guess Stephen could tell us if that is indeed (or not) what happen(s|ed) with XEmacs's bignums. Stefan