Question

What is the equivalent of a static_cast with boost::shared_ptr?

In other words, how do I have to rewrite the following

Base* b = new Derived(); Derived* d = static_cast<Derived*>(b); 

when using shared_ptr?

boost::shared_ptr<Base> b(new Derived()); boost::shared_ptr<Derived> d = ??? 

Answer 1

Use boost::static_pointer_cast:

boost::shared_ptr<Base> b(new Derived()); boost::shared_ptr<Derived> d = boost::static_pointer_cast<Derived>(b);