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: When should ralloc.c be used? (WAS: bug#24358) Date: Thu, 27 Oct 2016 22:40:01 -0400 Message-ID: References: <87twe6sx2g.fsf@users.sourceforge.net> <87eg51ng4r.fsf_-_@users.sourceforge.net> <87k2djwumn.fsf@users.sourceforge.net> <83h98nidvd.fsf@gnu.org> <87eg3rvtsf.fsf@users.sourceforge.net> <83k2dihpm9.fsf@gnu.org> <8760p2wzgj.fsf@users.sourceforge.net> <838ttyhhzu.fsf@gnu.org> <871szqwu51.fsf@users.sourceforge.net> <831szqhbc2.fsf@gnu.org> <87d1itt79z.fsf_-_@users.sourceforge.net> <7baa18d4-2b09-caa8-005e-29008a383ad1@cs.ucla.edu> <83mvhwrgd5.fsf@gnu.org> <8539f38f-9a11-44c3-4de7-bb974c96206c@cs.ucla.edu> <83d1iq5ib1.fsf@gnu.org> <83r3753c8j.fsf@gnu.org> <83r374wh32.fsf@gnu.org> <9dca4b78-b142-2bae-4401-3f1ed74598b3@cs.ucla.edu> Reply-To: rms@gnu.org NNTP-Posting-Host: blaine.gmane.org Content-Type: text/plain; charset=Utf-8 X-Trace: blaine.gmane.org 1477626880 12455 195.159.176.226 (28 Oct 2016 03:54:40 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Fri, 28 Oct 2016 03:54:40 +0000 (UTC) Cc: emacs-devel@gnu.org To: Paul Eggert Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Fri Oct 28 05:54:36 2016 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 1bzyFG-0000Zx-AU for ged-emacs-devel@m.gmane.org; Fri, 28 Oct 2016 05:54:18 +0200 Original-Received: from localhost ([::1]:46383 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bzyFI-0006Mv-K9 for ged-emacs-devel@m.gmane.org; Thu, 27 Oct 2016 23:54:20 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:47103) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bzx5Q-0003CG-KV for emacs-devel@gnu.org; Thu, 27 Oct 2016 22:40:06 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bzx5P-0003s6-W5 for emacs-devel@gnu.org; Thu, 27 Oct 2016 22:40:04 -0400 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:42130) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bzx5O-0003p4-AQ; Thu, 27 Oct 2016 22:40:02 -0400 Original-Received: from rms by fencepost.gnu.org with local (Exim 4.82) (envelope-from ) id 1bzx5N-000724-RO; Thu, 27 Oct 2016 22:40:01 -0400 In-reply-to: <9dca4b78-b142-2bae-4401-3f1ed74598b3@cs.ucla.edu> (message from Paul Eggert on Thu, 27 Oct 2016 15:34:23 -0700) 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:208909 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. ]]] > Something along the lines of your idea for storage creation should work, > though we'll have to be careful about destructive operations like setcar > that can cause an object with an earlier sequence number to point to an > object with a later sequence number. Why so? The purpose of sequence numbers is simply so you can refer to the objects already made -- not for proving some theorems of well-foundedness. Cycles should not be a problem. > It's not clear whether it has > significant advantages over the C-based approach. Here are two: * You don't need a C compiler to dump Emacs. * You don't need to relink to dump Emacs. -- 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.