What is the purpose of the Visitor design pattern?

What is the purpose of the Visitor design pattern?

The purpose of the Visitor design pattern is to separate the algorithm or logic from the objects on which it operates. It allows adding new operations to existing object structures without modifying those structures. The pattern achieves this by defining a separate visitor class that encapsulates the new behavior and visits each element of the object structure, allowing the elements to accept the visitor and execute the appropriate operation. This promotes extensibility and flexibility in the design.