[Boost-users] shared_ptr downcast

Subject: [Boost-users] shared_ptr downcast
From: Jason Cipriani (jason.cipriani_at_[hidden])
Date: 2008-12-23 04:36:41

If I have:

class Base { };
class Derived : public Base { };

And a container, e.g.:

std::vector<boost::shared_ptr<Base> > objs;

How do I downcast to a shared_ptr<Derived>? E.g.:

boost::shared_ptr<Derived> d = (boost::shared_ptr<Derived>)objs[0];

I have a function that takes a shared_ptr<Derived> and all I have is a
shared_ptr<Base>. I don't mind static_cast behavior, although
dynamic_cast behavior would be ideal.

Thanks,
Jason