[Openmcl-devel] #_ arg expansion problem

[Andrew P. Lentvorski, Jr.]

On Jul 10, 2004, at 6:16 AM, Rick Taube wrote:

>> I have a hunch that it's a structure of some sort ...
>
> yes, your hunch is correct. Now I undestand the void return value and 
> why funcs with simiar args are working (because they dont themselves 
> return structs). I actually remember reading something about the 
> explicit "extra" painter arg business in the openmcl docs but somehow 
> didn't connect that with the error I was getting :/  Anyway with th 
> offending func fixed and adding your gkt_init func from gtk-clock.lisp 
> Im now able to load my gtk ffi and pop up a gtk window. woo woo! Thank 
> you for the explanation.
>

As a side note, if you are trying to use the full wrapping system for 
Gtk, the PyGtk source code might save you a lot of time.

Inside the PyGtk source tree, there are files with the extension of 
".defs"  These files are Scheme descriptions of the C Gtk functions 
calls.  For example, from gtk.defs:

(define-function init
   (c-name "gtk_init")
   (return-type "none")
   (parameters
     '("int*" "argc")
     '("char***" "argv")
   )
)

It might save you a lot of typing.  I think these same ".defs" files 
are also used for some of the other language bindings, too.

-a