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 OAA01497; Mon, 29 Jul 2002 14:49:17 +0200 (MET DST) X-Authentication-Warning: pauillac.inria.fr: majordomo set sender to owner-caml-list@pauillac.inria.fr using -f 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 OAA01473 for ; Mon, 29 Jul 2002 14:49:16 +0200 (MET DST) Received: from dewberry.cc.columbia.edu (dewberry.cc.columbia.edu [128.59.59.68]) by nez-perce.inria.fr (8.11.1/8.11.1) with ESMTP id g6TCnF509345 for ; Mon, 29 Jul 2002 14:49:15 +0200 (MET DST) Received: from there (tw304h3.cpmc.columbia.edu [156.111.84.180]) by dewberry.cc.columbia.edu (8.9.3/8.9.3) with SMTP id IAA02832 for ; Mon, 29 Jul 2002 08:49:14 -0400 (EDT) Message-Id: <200207291249.IAA02832@dewberry.cc.columbia.edu> Content-Type: text/plain; charset="iso-8859-1" From: Oleg To: caml-list@inria.fr Subject: [Caml-list] marshalling and code changes Date: Mon, 29 Jul 2002 08:50:26 -0400 X-Mailer: KMail [version 1.3.2] MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: owner-caml-list@pauillac.inria.fr Precedence: bulk Hi Suppose I use Marshall module (and input_value / output_value pervasives) to serialize a sophisticated data type. If I make [small] changes to this data type, what is the best way to convert old saved data? What if the new type is a supertype to the old one, can I load it safely? I tried it with type old_type = Float of float | Int of int ;; type new_type = Float of float | Int of int | S of string;; and it seemed to have worked with input_value and output_value. Thanks Oleg ------------------- 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