> >>Is this happening somewhere in the type traits code? Can you post an > >>instantiation backtrace? > >> > > > > It seems to be. Here's the error message: > > I guess the question here is: "should > is_polymorphic<some_union>::value compile?" > > If so, then we have a bug in is_polymorphic. If not, we should > change all uses of is_polymorphic<T> in > > boost/python/class.hpp > boost/python/object/class_converters.hpp > boost/python/object/inheritance.hpp > > to: > mpl::and_<is_class<T>, is_polymorphic<T> > > > You can make this patch yourself in Boost.Python as an interim > measure to see if it makes wrapping unions work.
It won't, we can't tell unions and classes apart, and we can't inherit from unions as is_polymorphic requires - in fact is_polymorphic already checks is_class internally, the only fix is to specialise is_class for the problem union type. John. _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost
