[C++-sig] boost.python metaclass problem

[Tim Blechmann]

hi stefan ...

> > now, when deriving my class from these two classes, i'm getting the
> > message:
> > TypeError: Error when calling the metaclass bases metaclass conflict:
> > the metaclass of a derived class must be a (non-strict) subclass of the
> > metaclasses of all its bases  
> > 
> > any idea, how to solve the metaclass conflict? my boost.python class has
> > the structure:
> > class_<my_wrapper, boost::noncopyable>("my_class")
> >     .def("my_fun", &my_wrapper::my_fun);
> 
> The problem you are facing is that there are certain constraints on
> the metaclasses of your (multiple) base classes:
> 
> http://www.python.org/download/releases/2.2/descrintro/#metaclasses
> 
> I don't know pyqt, and I'm not sure you get access to boost.python's
> own metaclass. (David ?) You may need to derive a new metaclass from
> boost.python's one as well as the pyqt metaclass.

i see ... in the meanwhile i've been trying to use the metaclass
conflict resolver found at
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/204197.
however with the result of giving me a 

TypeError: multiple bases have instance lay-out conflict

i would prefer to find a clean solution for this, avoiding the multiple
inheritance would add an additional indirection in my code, that i'd
like to avoid ...

thanks ... tim

--
tim at klingt.org    ICQ: 96771783
http://tim.klingt.org

Your mind will answer most questions if you learn to relax and wait
for the answer.
  William S. Burroughs
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