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=0.9 required=5.0 tests=AWL,SPF_FAIL autolearn=disabled version=3.1.3 X-Original-To: caml-list@yquem.inria.fr Delivered-To: caml-list@yquem.inria.fr Received: from concorde.inria.fr (concorde.inria.fr [192.93.2.39]) by yquem.inria.fr (Postfix) with ESMTP id EDD57BC69 for ; Sun, 29 Jul 2007 08:59:56 +0200 (CEST) Received: from ciao.gmane.org (main.gmane.org [80.91.229.2]) by concorde.inria.fr (8.13.6/8.13.6) with ESMTP id l6T6xu8i003333 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=NO) for ; Sun, 29 Jul 2007 08:59:56 +0200 Received: from list by ciao.gmane.org with local (Exim 4.43) id 1IF2kk-0002bZ-1M for caml-list@inria.fr; Sun, 29 Jul 2007 08:59:46 +0200 Received: from user-0cdfa2e.cable.mindspring.com ([24.215.168.78]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 29 Jul 2007 08:59:46 +0200 Received: from ccshan by user-0cdfa2e.cable.mindspring.com with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 29 Jul 2007 08:59:46 +0200 X-Injected-Via-Gmane: http://gmane.org/ To: caml-list@inria.fr From: Chung-chieh Shan Subject: Re: Void type? Date: Sun, 29 Jul 2007 02:31:24 -0400 Message-ID: References: <6h3rn4-uu7.ln1@mantle.rutgers.edu> <61777.84.165.172.53.1185610925.squirrel@www.ps.uni-sb.de> X-Complaints-To: usenet@sea.gmane.org X-Gmane-NNTP-Posting-Host: user-0cdfa2e.cable.mindspring.com User-Agent: tin/1.9.2-20070201 ("Dalaruan") (UNIX) (Linux/2.6.22 (i686)) Sender: news X-Miltered: at concorde with ID 46AC3AEC.000 by Joe's j-chkmail (http://j-chkmail . ensmp . fr)! X-Spam: no; 0.00; rossberg:01 gmane:01 ocaml's:01 sig:01 wrote:01 wrote:01 rec:01 rec:01 oops:01 caml:02 consistent:02 uni-sb:03 uni-sb:03 let:03 let:03 rossberg@ps.uni-sb.de wrote in article <61777.84.165.172.53.1185610925.squirrel@www.ps.uni-sb.de> in gmane.comp.lang.caml.inria: > Chung-chieh Shan wrote: > > type void = Void of void > Dont't forget OCaml's let-rec: > let rec v = Void v > works like a charm. Oops! Thanks. I guess contravariance in charm is a curse. (: What about: # type void = { v: 'a. 'a };; type void = { v : 'a. 'a; } # let rec vv = { v = vv };; This field value has type 'a which is less general than 'b. 'b -- Edit this signature at http://www.digitas.harvard.edu/cgi-bin/ken/sig People are oddly consistent.