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=0.0 required=5.0 tests=AWL autolearn=disabled version=3.1.3 X-Original-To: caml-list@yquem.inria.fr Delivered-To: caml-list@yquem.inria.fr Received: from mail1-relais-roc.national.inria.fr (mail1-relais-roc.national.inria.fr [192.134.164.82]) by yquem.inria.fr (Postfix) with ESMTP id EF502BD12 for ; Fri, 5 Oct 2007 00:25:26 +0200 (CEST) X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AgAAADEFBUfLENaMnmdsb2JhbACOOAEBAQEHBAYp X-IronPort-AV: E=Sophos;i="4.21,232,1188770400"; d="scan'208";a="2156631" Received: from ipmail01.adl2.internode.on.net ([203.16.214.140]) by mail1-smtp-roc.national.inria.fr with ESMTP; 05 Oct 2007 00:25:25 +0200 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AgAAAA0DBUd5LHvc/2dsb2JhbAAM X-IronPort-AV: E=Sophos;i="4.21,232,1188743400"; d="scan'208";a="204386714" Received: from ppp121-44-123-220.lns10.syd6.internode.on.net (HELO [192.168.1.201]) ([121.44.123.220]) by ipmail01.adl2.internode.on.net with ESMTP; 05 Oct 2007 07:55:23 +0930 Subject: Re: [Caml-list] Re: How important are circular lists/recursive objects? From: skaller To: rossberg@ps.uni-sb.de Cc: caml-list@yquem.inria.fr In-Reply-To: <60663.84.159.34.129.1191533795.squirrel@www.ps.uni-sb.de> References: <1175664498.24614.5.camel@rosella.wigram> <20071004194808.6d7e1136@localhost.localdomain> <1191530384.7078.102.camel@rosella.wigram> <60663.84.159.34.129.1191533795.squirrel@www.ps.uni-sb.de> Content-Type: text/plain Date: Fri, 05 Oct 2007 08:25:23 +1000 Message-Id: <1191536723.7771.20.camel@rosella.wigram> Mime-Version: 1.0 X-Mailer: Evolution 2.10.1 Content-Transfer-Encoding: 7bit X-Spam: no; 0.00; recursive:01 0200,:01 rossberg:01 ocaml:01 ocaml:01 -rectypes:01 sourceforge:01 sourceforge:01 wrote:01 wrote:01 rec:01 caml-list:01 cyclic:01 cyclic:01 functional:02 On Thu, 2007-10-04 at 23:36 +0200, rossberg@ps.uni-sb.de wrote: > skaller wrote: > > Note that stuff like: > > > > let rec x= (1,x) > > > > is not generally allowed: in functional terms it is ill-defined, > > It is disallowed in OCaml because it has a cyclic type, not because it is > a cyclic value. Try with "ocaml -rectypes". lists have cyclic types too, they're not disallowed! -- John Skaller Felix, successor to C++: http://felix.sf.net