Thanks Bulat! So since we are "talking" ;^) .... is there a function already in Foreign that will allow me to ...

[a] -> Ptr (Ptr ()) i.e. map a list of type "a" to an array of ptrs of type "a"?

Kind regards, Vasili

On Fri, Aug 1, 2008 at 12:53 AM, Bulat Ziganshin <bulat.ziganshin@gmail.com> wrote:

Hello Vasili,

Friday, August 1, 2008, 9:08:05 AM, you wrote:

> Is a (Ptr (Ptr a)) a polymorphic representation of an array of
> pointers of type "a"? I want to pass an array of pointers to a C function.

use Ptr (Ptr ())

Ptr () in haskell is like void* in C, it's used to represent pointer
to arbitrary type. you can use castPtr to cast pointers between different
types

--
Best regards,
Bulat mailto:Bulat.Ziganshin@gmail.com