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=0.8 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 mail2-relais-roc.national.inria.fr (mail2-relais-roc.national.inria.fr [192.134.164.83]) by yquem.inria.fr (Postfix) with ESMTP id DD158BC37 for ; Fri, 29 May 2009 17:33:46 +0200 (CEST) X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AmMDAM+cH0pQRFuwWWdsb2JhbACYCgEWFQS6HoQMBQ X-IronPort-AV: E=Sophos;i="4.41,272,1241388000"; d="scan'208";a="27033255" Received: from furbychan.cocan.org ([80.68.91.176]) by mail2-smtp-roc.national.inria.fr with ESMTP; 29 May 2009 17:33:46 +0200 Received: from rich by furbychan.cocan.org with local (Exim 4.63) (envelope-from ) id 1MA45Z-0001KD-Vy; Fri, 29 May 2009 16:33:45 +0100 Date: Fri, 29 May 2009 16:33:45 +0100 To: Dario Teixeira Cc: caml-list@yquem.inria.fr Subject: Re: [Caml-list] Width subtyping Message-ID: <20090529153345.GA4886@annexia.org> References: <327446.80988.qm@web111511.mail.gq1.yahoo.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <327446.80988.qm@web111511.mail.gq1.yahoo.com> User-Agent: Mutt/1.5.13 (2006-08-11) From: Richard Jones X-Spam: no; 0.00; subtyping:01 syntax:01 ocaml:01 2009:98 wrote:01 caml-list:01 int:01 int:01 width:97 garrigue:03 nagoya-u:04 fri:05 extension:06 red:92 tired:87 On Fri, May 29, 2009 at 07:10:12AM -0700, Dario Teixeira wrote: > type t1 = {a: int; b: int; c: int; } > type t2 = {a: int; b: int; c: int; d: int;} > type t3 = { b: int; c: int; d: int;} I've very tired at the moment, but I think that Garrigue's polymap syntax extension does what you want: http://www.math.nagoya-u.ac.jp/~garrigue/code/ocaml.html If not, just ignore me! Rich. -- Richard Jones Red Hat