From mboxrd@z Thu Jan 1 00:00:00 1970 Received: (from majordomo@localhost) by pauillac.inria.fr (8.7.6/8.7.3) id QAA30357; Thu, 12 Aug 2004 16:28:57 +0200 (MET DST) Received: from nez-perce.inria.fr (nez-perce.inria.fr [192.93.2.78]) by pauillac.inria.fr (8.7.6/8.7.3) with ESMTP id QAA13349 for ; Thu, 12 Aug 2004 16:28:56 +0200 (MET DST) Received: from shiva.jussieu.fr (shiva.jussieu.fr [134.157.0.129]) by nez-perce.inria.fr (8.12.10/8.12.10) with ESMTP id i7CEStmL014712 for ; Thu, 12 Aug 2004 16:28:55 +0200 Received: from ibm3.cicrp.jussieu.fr (ibm3.cicrp.jussieu.fr [134.157.15.3]) by shiva.jussieu.fr (8.12.11/jtpda-5.4) with ESMTP id i7CES5g7014173 ; Thu, 12 Aug 2004 16:28:05 +0200 (CEST) X-Ids: 166 Received: from ibm1.cicrp.jussieu.fr (ibm1.cicrp.jussieu.fr [134.157.15.1]) by ibm3.cicrp.jussieu.fr (8.8.8/jtpda/mob-V8) with ESMTP id QAA16660 ; Thu, 12 Aug 2004 16:26:51 +0200 Received: from localhost (fernande@localhost) by ibm1.cicrp.jussieu.fr (8.8.8/jtpda/mob-v8) with ESMTP id QAA684158 ; Thu, 12 Aug 2004 16:26:29 +0200 X-Authentication-Warning: ibm1.cicrp.jussieu.fr: fernande owned process doing -bs Date: Thu, 12 Aug 2004 16:26:28 +0200 (DST) From: Diego Olivier Fernandez Pons X-X-Sender: fernande@ibm1 To: "Marcin 'Qrczak' Kowalczyk" cc: caml-list@inria.fr Subject: Re: [Caml-list] getting the type of a polymorphic data ? In-Reply-To: <1092320020.19848.82.camel@qrnik> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE X-Miltered: at nez-perce with ID 411B7EA7.001 by Joe's j-chkmail (http://j-chkmail.ensmp.fr)! X-Miltered: at shiva.jussieu.fr with ID 411B7E75.000 by Joe's j-chkmail (http://j-chkmail.ensmp.fr)! X-Antivirus: scanned by sophie at shiva.jussieu.fr X-Loop: caml-list@inria.fr X-Spam: no; 0.00; pons:01 pons:01 etu:99 caml-list:01 hashes:01 hashing:01 hash:01 fernandez:01 fernandez:01 int:01 int:01 polymorphic:01 olivier:02 olivier:02 invariant:03 Sender: owner-caml-list@pauillac.inria.fr Precedence: bulk Bonjour, > I'm not sure what do you mean, but there are 2^31 int values, half > of them negative, which map to 2^30 hashes, all non-negative. > Hashing an int stripts its sign bit. Bon... J'avais rat=E9 celle l=E0. On peut raisonnablement se contenter d'entiers positifs pour les variables de d=E9cision mais si d'une part hash ne laisse pas invariant le type entier, d'autre part on ne peut pas faire la diff=E9rence entre un v=E9ritable entier et une valeur isomorphe c'est perdu d'avance. Diego Olivier ------------------- To unsubscribe, mail caml-list-request@inria.fr Archives: http://caml.inria.fr Bug reports: http://caml.inria.fr/bin/caml-bugs FAQ: http://caml.inria.fr/FAQ/ Beginner's list: http://groups.yahoo.com/group/ocaml_beginners