What are the visitor patterns in C++?

Can you explain the visitor pattern in C++?

Sure! The visitor pattern is a design pattern that lets you separate an algorithm from the objects on which it operates.

How does it improve code maintainability?

It allows you to add new operations without modifying the existing classes, making the code easier to maintain.

Can you give me a simple code example?

Absolutely! Here's a basic example:

class Visitor;
class Element {
public:
    virtual void accept(Visitor& v) = 0;
};

class ConcreteElementA : public Element {
public:
    void accept(Visitor& v) override;
};

class Visitor {
public:
    virtual void visit(ConcreteElementA& element) = 0;
};

What are some common use cases for the visitor pattern?

Common use cases include operations on object structures, such as serialization, printing, or applying algorithms.