What are the different types of iterators in C++20?

What are the different types of iterators in C++20?

C++20 introduces several iterator types, including input, output, forward, bidirectional, and random access iterators. Each type has its own characteristics and use cases.

Can you explain the differences between these iterator types?

Sure! Input iterators allow reading data, output iterators allow writing data, forward iterators can read and write but only move forward, bidirectional iterators can move both ways, and random access iterators allow jumping to any position.

What are some examples of where I would use each type?

Input iterators are used in algorithms like std::copy, output iterators in std::ostream_iterator, forward iterators in std::forward_list, bidirectional in std::list, and random access in std::vector.

Are there any new features in C++20 related to iterators?

Yes, C++20 introduced concepts for iterators, which allow you to specify requirements for iterator types more clearly, improving code readability and safety.