Re: [Boost-users] shared_ptr invalid covariant return type

Andy Rushton escreveu:

Except you've quoted it wrong. The return type of virtual functions must always be the same for all classes in the polymorphic hierarchy. This is standard C++ polymorphism - always use a pointer to the superclass to point to all subclasses. The return type in this case should be A* for both cases:

And apparently you've forgotten what covariant return types are :) Regards, rod