From: Xavier Leroy <xavier.leroy@inria.fr>
To: Thierry SALSET <ts@cermics.enpc.fr>
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] interfacing C++ with OCaml
Date: Fri, 5 Jul 2002 11:46:12 +0200 [thread overview]
Message-ID: <20020705114612.C16273@pauillac.inria.fr> (raw)
In-Reply-To: <20020704.192114.115911667.ts@cassis.enpc.fr>; from ts@cermics.enpc.fr on Thu, Jul 04, 2002 at 07:21:14PM +0200
> I used Camlidl to help me interface C functions and datatypes with OCaml
> under Unix but now I would like to interface some existing (written by
> others) C++ classes and methods with OCaml. I am not a C++ programmer
> and I'm a little bit lost. Can Camlidl be of some help ? Should I write
> a C layer between C++ and OCaml ?
This is a reasonable option. Once you have a pure C API for the
C++ code, you can use CamlIDL as usual.
CamlIDL itself doesn't have any kind of direct support for C++. Well,
it supports COM interfaces, which correspond to a very small subset of
C++ classes, but I doubt this can help you, unless the C++ code of
interest is already structured as COM interfaces.
The other alternative is to hand-write Caml wrappers that call
directly the C++ code, without going through C. I believe you can
write those wrappers in C++ if you're careful to declare the entry points
(the functions that Caml will call) "extern "C"".
Some of the features of C++ might be used to wrap the Caml runtime API (the
functions and macros provided by <caml/mlvalues.h>, etc) in a more
C++-friendly style, see e.g.
http://caml.inria.fr/archives/199704/msg00029.html
Bon courage...
- Xavier Leroy
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next prev parent reply other threads:[~2002-07-05 9:46 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-07-04 17:21 Thierry SALSET
2002-07-05 9:46 ` Xavier Leroy [this message]
2004-07-15 13:31 [Caml-list] Interfacing C with Ocaml Julius
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