What are some common iterator design patterns in C++?

What are some common iterator design patterns in C++?

In C++, common iterator design patterns include the Iterator, Reverse Iterator, and Const Iterator patterns. These patterns help in traversing collections.

Can you explain the Iterator pattern in more detail?

Sure! The Iterator pattern provides a way to access elements of a collection sequentially without exposing its underlying representation. It typically involves an Iterator class that maintains the current position.

What is the difference between a regular iterator and a reverse iterator?

A regular iterator traverses a collection from the beginning to the end, while a reverse iterator traverses it from the end to the beginning, allowing access to elements in reverse order.

Are there any built-in iterators in C++?

Yes, C++ provides several built-in iterators, such as those for STL containers like vectors, lists, and maps. They support various operations like incrementing and dereferencing.

How can I implement a custom iterator for my class?

To implement a custom iterator, define an iterator class within your collection class, implement the necessary operators (like ++, *, and !=), and ensure it can traverse your collection.