"Robert Ramey" <ramey@rrsd.com> writes:
David Abrahams wrote:
Yeah, it looks like vc-7.0 is still eliminating some of the startup code. My biggest problem is that I don't understand what you're registering and where, and I can't understand the error messages I see. So for example, when I get an "unregistered class" exception, what does that mean? It isn't at all obvious what constitutes registration of a class.
Basically it means that it an attempt to retrieve an instance from the global table of extended_type_info entries was not successful. The main function of export.hpp is to be sure that all that there is an extended_type_info entry for each exported type. This could fail due to compiler bug, bug in export.hpp or the user might have failed to use BOOST_EXPORT for that type.
Yes, I understand it in abstract terms. What I can't tell, when I get one of those exceptions, is what I have to make happen. What function should have been called (or object constructed), and with what arguments? This gives me a hint, for a different exception, that void_cast_register should have been called (although it still leaves out lots of info, like the identities of the base and derived classes). unregistered_cast // base - derived relationship not registered with // void_cast_register I really need the same kind of information about unregistered_class. -- Dave Abrahams Boost Consulting www.boost-consulting.com