Behavioral Design Patterns in C++ - Shapes Example - III

The lecture discusses the implementation of the visitor pattern to add new operations to a shape hierarchy without using dynamic cost. It starts with the Render class and RTTI usage, then introduces the visitor pattern. The implementation involves adding an accept method in shape subclasses and creating a visitor hierarchy. The Render class is adapted as a visitor to draw shapes. The lecture concludes with generating a class diagram, highlighting the benefits of the visitor pattern in maintaining code without modifications.

How does the implementation of the visitor pattern avoid dynamic cost?

Describe the role of the renderer visitor in the object structure.