[Pyrex] Callback with bound method

[ha shao]

Is this question has no answer or it just got missed?
What's is the recommend way to wrap callbacks? Anyone?

On Thu, Jul 08, 2004 at 03:52:51AM +0800, ha shao wrote:
> It seems that the recommend way of wrapping callbacks is using bound
> methods. By my attempt to do it failed:
> 
> 
> ctypedef void (*cbfunc)(void *userdata)
> cdef extern void add_cb(cbfunc cb, void *data)
> 
> cdef class CBClass:
>     cdef object _callback
>     def __init__(self, callback):
>         self._callback = callback
>     cdef void action(self, void *userdata):
>         self._callback(<object>userdata)
> 
> def addhook(acb, adata):
>     cdef CBClass cbobj
>     cbobj = CBClass(acb)
>     add_cb(cbobj.action, <void*> adata)
> 
> The above code will cause pyrexc to spit out:
>     test.pyx:14:16: C method can only be called
>     test.pyx:14:16: Cannot assign type 'void ((struct
>     __pyx_obj_4test_CBClass *,void (*)))' to 'void ((*)(void (*)))'
> 
> Did I misunderstood something? The version is 0.9.2.1
>