What is the Visitor design pattern in C++?

What is the Visitor design pattern in C++?

The Visitor design pattern allows you to separate an algorithm from the object structure on which it operates. It lets you add new operations without modifying the existing classes.

Can you give me an example of how it works?

Sure! Imagine you have a set of shapes like Circle and Square. Instead of adding methods to these classes, you create a Visitor class that implements operations for each shape.

What are the benefits of using the Visitor pattern?

The main benefits include adding new operations easily, keeping the object structure clean, and promoting the Single Responsibility Principle.

Are there any drawbacks to using it?

Yes, it can make the code more complex and harder to maintain, especially if the object structure changes frequently.