How do I create custom iterators in C++11?

How do I create custom iterators in C++11?

To create a custom iterator in C++11, you need to define a class that implements the iterator interface, including methods like operator++, operator*, and operator!=.

Can you show me a simple example of a custom iterator?

Sure! Here's a basic example of a custom iterator for a simple array:

class ArrayIterator {
public:
    ArrayIterator(int* ptr) : m_ptr(ptr) {}
    int& operator*() { return *m_ptr; }
    ArrayIterator& operator++() { ++m_ptr; return *this; }
    bool operator!=(const ArrayIterator& other) const { return m_ptr != other.m_ptr; }
private:
    int* m_ptr;
};

What about using it with a range-based for loop?

You can use your custom iterator in a range-based for loop by defining begin() and end() methods in your container class that return instances of your iterator.

Are there any best practices for implementing custom iterators?

Yes, ensure your iterator adheres to the standard iterator requirements, such as supporting copy and assignment, and consider implementing additional features like operator-- for bidirectional iterators.