What is the Iterator Pattern in C++?

Can you explain the Iterator Pattern in C++?

Sure! The Iterator Pattern is a design pattern that allows sequential access to elements in a collection without exposing the underlying structure.

How does it differ from other design patterns?

It specifically focuses on providing a way to traverse a collection, while other patterns may deal with object creation or behavior.

Can you give me a code example?

Certainly! Here's a simple example:

class Iterator {
public:
    virtual int next() = 0;
    virtual bool hasNext() = 0;
};

class ConcreteIterator : public Iterator {
private:
    std::vector<int> items;
    int index;
public:
    ConcreteIterator(std::vector<int> items) : items(items), index(0) {}
    int next() override { return items[index++]; }
    bool hasNext() override { return index < items.size(); }
};

What are the benefits of using the Iterator Pattern?

The benefits include improved code readability, separation of concerns, and the ability to traverse different types of collections uniformly.