Re: [Chicken-users] Ref foreign type.

[Nicholas \"Indy\" Ray]

Thanks, the patch fixes the problem. Works perfectly.

Indy

On Mon, Sep 21, 2009 at 10:28 PM, Jim Ursetto <address@hidden> wrote:

Looks like there are two issues here.  First, try applying the
attached patch to fix a bug in c-backend.  Second, your usage is
incorrect--ref types require an operating system pointer or a locative
(since they can be modified)--ref is the analog of c-pointer.  For
example, you can change your example to:

(print
  (let-location ((c char #\c))

   ((foreign-lambda* bool (((ref char) mC))
    "C_return(mC == 'c');")

   (location c))))

Of course, you must then compile with csc -c++.
Jim

2009/9/21 Nicholas "Indy" Ray <address@hidden>:

> I've been trying to use the "ref" FFI type (as documented here:
> http://chicken.wiki.br/man/4/Foreign%20type%20specifiers#(ref TYPE) ) with
> no success. Here is an example of my usage:
>
> (print
>    ((foreign-lambda* bool (((ref char) mC))
>      "C_return(mC == 'c');")
>    #\c))
>
> compiling this with csc from Chicken 4 gives me the error:
> Error: illegal foreign type `ref'
> I find this odd as in c-backend.scm:1170 in foreign-type-declaration this
> code exists:
> ((and (= 2 len)
> (eq? 'ref (car type)))
> (foreign-type-declaration (cadr type) (string-append "&" target)) )
>
> Implying that ref should still be supported.
> Any help with this would be greatly appreciated.
> Indy

> _______________________________________________
> Chicken-users mailing list
> address@hidden
> http://lists.nongnu.org/mailman/listinfo/chicken-users
>
>