From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on yquem.inria.fr X-Spam-Level: X-Spam-Status: No, score=0.4 required=5.0 tests=AWL,NO_REAL_NAME autolearn=disabled version=3.1.3 X-Original-To: caml-list@yquem.inria.fr Delivered-To: caml-list@yquem.inria.fr Received: from mail4-relais-sop.national.inria.fr (mail4-relais-sop.national.inria.fr [192.134.164.105]) by yquem.inria.fr (Postfix) with ESMTP id A8A35BC69 for ; Thu, 4 Oct 2007 19:56:23 +0200 (CEST) X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AgAAAErGBEfAXQInemdsb2JhbACOOAEBCQo X-IronPort-AV: E=Sophos;i="4.21,231,1188770400"; d="scan'208";a="17302153" Received: from concorde.inria.fr ([192.93.2.39]) by mail4-smtp-sop.national.inria.fr with ESMTP; 04 Oct 2007 19:56:23 +0200 Received: from mail2-relais-roc.national.inria.fr (mail2-relais-roc.national.inria.fr [192.134.164.83]) by concorde.inria.fr (8.13.6/8.13.6) with ESMTP id l94HuM4m014453 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=OK) for ; Thu, 4 Oct 2007 19:56:23 +0200 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AgAAAIbGBEeGYAcfnmdsb2JhbACOOAEBAgcEBic X-IronPort-AV: E=Sophos;i="4.21,231,1188770400"; d="scan'208";a="2387191" Received: from theia.rz.uni-saarland.de ([134.96.7.31]) by mail2-smtp-roc.national.inria.fr with ESMTP; 04 Oct 2007 19:56:22 +0200 Received: from mail.cs.uni-sb.de (mail.cs.uni-sb.de [134.96.254.200]) by theia.rz.uni-saarland.de (8.14.1/8.14.0) with ESMTP id l94HuLDI020240; Thu, 4 Oct 2007 19:56:21 +0200 Received: from mail.ps.uni-sb.de (james.ps.uni-sb.de [134.96.186.68]) by mail.cs.uni-sb.de (8.14.1/2007091300) with ESMTP id l94HuLF4028317; Thu, 4 Oct 2007 19:56:21 +0200 (CEST) Received: from localhost ([127.0.0.1] helo=www.ps.uni-sb.de ident=www-data) by mail.ps.uni-sb.de with esmtp (Exim 4.63) (envelope-from ) id 1IdUvs-0004nt-Ua; Thu, 04 Oct 2007 19:56:21 +0200 Received: from 84.159.34.129 (SquirrelMail authenticated user rossberg) by www.ps.uni-sb.de with HTTP; Thu, 4 Oct 2007 19:56:20 +0200 (CEST) Message-ID: <59808.84.159.34.129.1191520580.squirrel@www.ps.uni-sb.de> In-Reply-To: <1191451810.7218.86.camel@rosella.wigram> References: <20071003083529.40DA2A99F@Adric.metnet.fnmoc.navy.mil> <4703FDEF.7030900@univ-savoie.fr> <1191451810.7218.86.camel@rosella.wigram> Date: Thu, 4 Oct 2007 19:56:20 +0200 (CEST) Subject: Re: [Caml-list] Unsoundness is essential From: rossberg@ps.uni-sb.de To: "skaller" Cc: caml-list@inria.fr User-Agent: SquirrelMail/1.4.9a MIME-Version: 1.0 Content-Type: text/plain;charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Priority: 3 (Normal) Importance: Normal X-SA-Exim-Connect-IP: 127.0.0.1 X-SA-Exim-Mail-From: rossberg@ps.uni-sb.de X-SA-Exim-Scanned: No (on mail.ps.uni-sb.de); SAEximRunCond expanded to false X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-3.0 (theia.rz.uni-saarland.de [134.96.7.31]); Thu, 04 Oct 2007 19:56:21 +0200 (CEST) X-AntiVirus: checked by AntiVir MailGate (version: 2.1.2-14; AVE: 7.6.0.20; VDF: 7.0.0.51; host: AntiVir1) X-Miltered: at concorde with ID 47052946.000 by Joe's j-chkmail (http://j-chkmail . ensmp . fr)! X-Spam: no; 0.00; rossberg:01 integers:01 denying:98 wrote:01 andreas:01 caml-list:01 exceptions:01 expression:02 bounds:02 uni-sb:03 languages:03 programming:03 unsound:07 soundness:07 soundness:07 skaller wrote: > > All advanced programming languages have unsound type systems > of necessity. Some falsely claim soundness by denying the > expression of certain type information (eg array bounds > or the type of integers excluding zero). No. Soundness is the absence of /untrapped/ errors. Exceptions are /trapped/ errors. Huge difference, esp with respect to safety and security. - Andreas