From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <tmp123@menta.net>
X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on yquem.inria.fr
X-Spam-Level: *
X-Spam-Status: No, score=1.5 required=5.0 tests=AWL,DNS_FROM_RFC_ABUSE,
	DNS_FROM_RFC_POST 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 1C977BC6B
	for <caml-list@yquem.inria.fr>; Wed, 13 Feb 2008 09:36:17 +0100 (CET)
X-IronPort-Anti-Spam-Filtered: true
X-IronPort-Anti-Spam-Result: AgAAADY7skc+KuYMfGdsb2JhbACQPAEBCQIIBwgTB5w7
X-IronPort-AV: E=Sophos;i="4.25,345,1199660400"; 
   d="scan'208";a="7256510"
Received: from smtp.ono.com (HELO resmaa01.ono.com) ([62.42.230.12])
  by mail2-smtp-roc.national.inria.fr with ESMTP; 13 Feb 2008 09:36:16 +0100
Received: from [159.23.98.243] (192.146.187.87) by resmaa01.ono.com (7.3.118.8) (authenticated as tmp123@menta.net)
        id 47B1862F00080EEE for caml-list@yquem.inria.fr; Wed, 13 Feb 2008 09:36:00 +0100
Message-ID: <47B2ABE6.9090605@menta.net>
Date: Wed, 13 Feb 2008 09:35:50 +0100
From: tmp123 <tmp123@menta.net>
User-Agent: Thunderbird 2.0.0.9 (Windows/20071031)
MIME-Version: 1.0
To: caml-list <caml-list@yquem.inria.fr>
Subject: next eleemnt in set
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
X-Spam: no; 0.00; abstract:01 parameter:02 suggestion:03 element:03 element:03 tmp:05 tmp:05 exists:05 implement:06 function:08 function:08 useful:09 i'm:09 wondering:09 methods:12 

Hello,

Thanks for your time.

I'm wondering which abstract type (set, map, ...) is the most useful to 
implement the following 3 methods: given a set of values, that are 
unique and ordered (it exists a "compare" function), it is necessary, in 
addition to the "add" and "remove element" methods, to have a "next" 
method. The next method takes as parameter one element of the set, and 
must return the immediatelly next element of the set, according to the 
provided compare function.

Please, have someone any suggestion?

Thanks again.