[Cython] Syntax to declare a c++ class?

[Stefan Behnel]

Dag Sverre Seljebotn wrote:
> Allocation would happen through an actual (as light-weight as
> possible, and probably mostly opaque, perhaps doing as much as printing
> the C++ name of the class in its repr) Python object

That wouldn't work, though. Imagine you'd return the C++ object pointer
from a function. What would happen to the Python object that holds it? How
would you keep the ref-counting context for it?

If we enable ref-counting for C++ objects, we should do it ourselves,
rather than relying on Python object creation. Not sure if that is doable
at all, but Python objects simply don't work here.

Stefan