How to perform a dynamic_cast with a unique_ptr?

Question

I have a class hierarchy as follows:

class BaseSession : public boost::enable_shared_from_this
class DerivedSessionA : public BaseSession
         


        

Answer 1

Unless you want to transfer ownership of your std::unique_ptr, your function should take pointer or reference to T.

So signature of Func should be something like Func(DerivedSessionA*)

and then your call may look like:

std::unique_ptr ptr; // Initialize it with correct value

Func(dynamic_cast(ptr.get()));

Or as you seems to call it directly from a method in BaseSession:

Func(dynamic_cast(this));