shared_ptr and private inheritance

From: Jason Winnebeck (yg-boost-users_at_[hidden])
Date: 2003-08-09 22:10:27

if class B : private A

in a method of class B, given a shared_ptr<B>, is it possible to get a 
shared_ptr<A> that shares ownership without making boost::shared_ptr<A> 
a friend in class B?

Jason Winnebeck