Re: [Caml-list] How OCaml objects of sum types can be passed to a C/C++ functions?

[Richard Jones <rich@annexia.org>]

On Wed, Jul 07, 2004 at 10:56:04AM +0200, Claudio Trento wrote:
> 
> on the subject of interfacing OCaml with C/C++, it is not clear
> to me whether and how OCaml objects of sum types can be passed
> to a C/C++ function.  For example, suppose I have the declaration
> 
> type expr =
>      Variable of int
>    | Coefficient of int
>    | UPlus of expr
>    | UMinus of expr
>    | Sum of (expr * expr)
>    | Difference of (expr * expr)
>    | Product of (expr * expr)
> 
> What is the best way to pass an expr object to C/C++?
> How can C/C++ code visit such a structure?
> Many thanks for your time and patience,

This section in the manual:

http://caml.inria.fr/ocaml/htmlman/manual032.html#htoc217

contains a rather unclear explanation.

Rich.

-- 
Richard Jones. http://www.annexia.org/ http://www.j-london.com/
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