Class QueueIterator

CoreLib/Base/Queue.h:10–78

template <class T>
class QueueIterator
{
public:
    using value_type = T;
    using reference = T&;
    using pointer = T*;
    using difference_type = int32_t;
    using size_type = uint32_t;
    using iterator_category = std::random_access_iterator_tag;

    QueueIterator(Queue<T>& q, int32_t i) : queue_(q), index_(i) {}

    QueueIterator operator ++ ()
    {
        QueueIterator<T> it(queue_, index_);
        index_++;
        return it;
    }

    QueueIterator& operator ++ (int)
    {
        index_++;
        return *this;
    }

    bool operator == (QueueIterator const& it) const
    {
        return it.index_ == index_;
    }

    bool operator != (QueueIterator const& it) const
    {
        return it.index_ != index_;
    }

    QueueIterator operator + (difference_type n) const
    {
        return QueueIterator(queue_, index_ + n);
    }

    QueueIterator operator - (difference_type n) const
    {
        return QueueIterator(queue_, index_ - n);
    }

    difference_type operator - (QueueIterator const& o) const
    {
        return (difference_type)(index_ - o.index_);
    }

    T& operator * () const
    {
        return queue_[index_];
    }

    T* operator -> () const
    {
        return &queue_[index_];