From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Ken Raeburn Newsgroups: gmane.emacs.devel Subject: Re: immediate strings #2 Date: Mon, 28 Nov 2011 14:48:15 -0500 Message-ID: References: <4ED35057.8010103@yandex.ru> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 (Apple Message framework v1084) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable X-Trace: dough.gmane.org 1322509712 4978 80.91.229.12 (28 Nov 2011 19:48:32 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Mon, 28 Nov 2011 19:48:32 +0000 (UTC) To: Emacs Dev Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Mon Nov 28 20:48:26 2011 Return-path: Envelope-to: ged-emacs-devel@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 1RV7Bh-0002OB-Tn for ged-emacs-devel@m.gmane.org; Mon, 28 Nov 2011 20:48:26 +0100 Original-Received: from localhost ([::1]:44187 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RV7Bh-00068S-Di for ged-emacs-devel@m.gmane.org; Mon, 28 Nov 2011 14:48:25 -0500 Original-Received: from eggs.gnu.org ([140.186.70.92]:38081) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RV7Be-00068M-5z for emacs-devel@gnu.org; Mon, 28 Nov 2011 14:48:23 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1RV7Bd-0007pc-6N for emacs-devel@gnu.org; Mon, 28 Nov 2011 14:48:22 -0500 Original-Received: from mail-vx0-f169.google.com ([209.85.220.169]:50271) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RV7Bd-0007pN-4C for emacs-devel@gnu.org; Mon, 28 Nov 2011 14:48:21 -0500 Original-Received: by vcbfk26 with SMTP id fk26so5863050vcb.0 for ; Mon, 28 Nov 2011 11:48:20 -0800 (PST) Original-Received: by 10.220.152.81 with SMTP id f17mr5127726vcw.194.1322509699810; Mon, 28 Nov 2011 11:48:19 -0800 (PST) Original-Received: from [10.1.12.27] (vpn.permabit.com. [204.246.225.2]) by mx.google.com with ESMTPS id c10sm4046596vdj.20.2011.11.28.11.48.17 (version=TLSv1/SSLv3 cipher=OTHER); Mon, 28 Nov 2011 11:48:19 -0800 (PST) In-Reply-To: X-Mailer: Apple Mail (2.1084) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 2) X-Received-From: 209.85.220.169 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.14 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-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:146319 Archived-At: On Nov 28, 2011, at 12:33, Stefan Monnier wrote: > I don't know any C compiler able to allocate unions at the bit level, = so > the above struct will have the following layout: The union still must be addressable (even without a tag or typedefname, = the address could be converted to void* and used for something, in = theory), so non-byte-aligned addressing would be broken anyways = (assuming a lack of bit-level addressing in pointers, which exists but = isn't common). Ken=