Behavioral Design Patterns in C++ - Variant

The video tutorial explores the use of variants in C++ as an alternative to unions and the visitor pattern. It highlights the limitations of unions in C++ and introduces variants as a more flexible and efficient solution. The tutorial demonstrates how to implement the visitor pattern using variants without requiring a hierarchy of visitor classes. It also covers the creation and usage of variants, emphasizing their advantages such as minimal overhead and the ability to use value semantics. The tutorial concludes by suggesting variants as a modern approach to implementing design patterns in C++.

Describe the process of adding new operations to existing classes using variants.

How does the use of value semantics with variants differ from pointer semantics?