Class QueueConstIterator

CoreLib/Base/Queue.h:82–150

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

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

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

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

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

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

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

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

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

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

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