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 mail3-relais-sop.national.inria.fr (mail3-relais-sop.national.inria.fr [192.134.164.104]) by yquem.inria.fr (Postfix) with ESMTP id 98CC3BC69 for ; Wed, 24 Oct 2007 16:51:56 +0200 (CEST) X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: Ao8CAMP4HkfUnw7Wnmdsb2JhbACCOIwiAgEBBwQGERg X-IronPort-AV: E=Sophos;i="4.21,325,1188770400"; d="scan'208";a="5055110" Received: from ptb-relay03.plus.net ([212.159.14.214]) by mail3-smtp-sop.national.inria.fr with ESMTP; 24 Oct 2007 16:51:55 +0200 Received: from [80.229.56.224] (helo=beast.local) by ptb-relay03.plus.net with esmtp (Exim) id 1IkhaM-0002R7-Bh for caml-list@yquem.inria.fr; Wed, 24 Oct 2007 15:51:54 +0100 From: Jon Harrop Organization: Flying Frog Consultancy Ltd. To: caml-list@yquem.inria.fr Subject: Re: [Caml-list] Preferred use of Invalid_argument and Failure Date: Wed, 24 Oct 2007 15:44:01 +0100 User-Agent: KMail/1.9.7 References: <867ildqacq.fsf@Llea.celt.neu> <0D7AC9CC-1885-4C13-8D9F-31C2D6BEFEE2@gmail.com> <891bd3390710240615j7916d8adua64ef1104f3444a8@mail.gmail.com> In-Reply-To: <891bd3390710240615j7916d8adua64ef1104f3444a8@mail.gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-15" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200710241544.01703.jon@ffconsultancy.com> X-Spam: no; 0.00; yaron:01 minsky:01 alist:01 frog:98 polymorphic:01 wrote:01 caml-list:01 variant:02 argument:02 pattern:04 explicit:04 somewhere:06 invalid:11 ltd:87 products:86 On Wednesday 24 October 2007 14:15:36 Yaron Minsky wrote: > As in: > > map_of_alist : ('a * 'b) list -> [ `Repeated_key of 'a | `Succ of ('a,'b) > Map.t ] > > The return value is both explicit and a polymorphic variant. We also use that pattern. I'll document it somewhere... -- Dr Jon D Harrop, Flying Frog Consultancy Ltd. http://www.ffconsultancy.com/products/?e