From: Matt Gushee <mgushee@havenrock.com>
To: caml-list@pauillac.inria.fr
Subject: Re: [Caml-list] CDuce
Date: Fri, 4 Jul 2003 13:37:11 -0600 [thread overview]
Message-ID: <20030704193710.GA11533@swordfish> (raw)
In-Reply-To: <Pine.SOL.4.44.0307041019010.23013-100000@clipper.ens.fr>
On Fri, Jul 04, 2003 at 10:20:14AM +0200, Alain.Frisch@ens.fr wrote:
>
> I'm pleased to announce the first public release of CDuce, a new
> strongly typed higher-order functional programming language for XML
> documents with an efficient type-based runtime implementation.
This is very interesting. I've compiled it and begun learning the language,
but there seems to be a problem with type inferencing in the 'load_xml'
function. Given the following XML:
-- abc.xml -------------------------------------------------------------
<?xml version="1.0" encoding="iso-8859-1"?>
<abc>
<a>aaaa</a>
<b>bbbb</b>
<c>cccc</c>
</abc>
------------------------------------------------------------- abc.xml --
My CDuce session looks like this:
CDuce version 0.1.0
# type ABC = <abc> [ A B C ]
> type A = <a> [ PCDATA ]
> type B = <b> [ PCDATA ]
> type C = <c> [ PCDATA ];;
# let abc : ABC = load_xml "abc.xml";;
Error at chars 16-34:
This expression should have type:
ABC
but its inferred type is:
Any
which is not a subtype, as shown by the sample:
Int
Have I done something wrong, or is this indeed a bug?
P.S.: Is there any particular reason your makefile doesn't have an
ordinary 'install' target, so that people can easily install the
tools for command-line use?
--
Matt Gushee When a nation follows the Way,
Englewood, Colorado, USA Horses bear manure through
mgushee@havenrock.com its fields;
http://www.havenrock.com/ When a nation ignores the Way,
Horses bear soldiers through
its streets.
--Lao Tzu (Peter Merel, trans.)
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next prev parent reply other threads:[~2003-07-04 19:37 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-07-04 8:20 Alain.Frisch
2003-07-04 19:37 ` Matt Gushee [this message]
2003-07-04 21:50 ` Alain.Frisch
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