[cffi-devel] defcallback with &rest

[Frank Goenninger]

Am 02.12.2011 um 19:46 schrieb Luís Oliveira:

> On Fri, Dec 2, 2011 at 5:36 PM, Frank Goenninger <frgo at me.com> wrote:
>> (defun frgo (fmt &rest args)
>>  (format t fmt args))
>> 
>> Now I want to define a C call back for that function:
>> 
>> (defcallback frgoc :void ((fmt :string) (args ???????
>> 
>> How do I define the callback such that I can have a C function with varargs being defined?
> 
> Sorry, no way to do that right now. Last time I checked, no Lisp's got
> support for such a feature. We might start using libffi to add extra
> (low-level) features in the near feature, but not even libffi supports
> this particular feature.

Understood. So I 'm back to square 1 with just a pointer to a struct that I have to de-structure myself. Not beautiful but ok. Thanks for the quick help.

Cheers
    Frank