[Boost-users] [type_erasure] any holding a ref to any

Say I have an object a of type any<mpl::vector<Concept1,typeid_<>>,_self&> and an object b of type any<Concept2,T> where Concept1 is a subconcept of Concept2. Is it possible to make a refer to b rather than the object wrapped by b? I mean: any_cast<void*>(&a)==&b typeid_of(a)==typeid(b) A solution involving wrapping/copying b into some auxiliary entity would be acceptable too. This questin is obviously connected to the implementation of boost::any_collection, as Steven will undoubtedly have guessed. Thank you, Joaquín M López Muñoz