ArrayIterator.h

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#pragma once
 
namespace ConfigDB
{
template <class ArrayType, typename ItemType> class ArrayIterator
{
public:
    using const_iterator = ArrayIterator;
 
    ArrayIterator() = default;
    ArrayIterator(const ArrayIterator&) = default;
 
    ArrayIterator(ArrayType& array, unsigned index) : array(&array), mIndex(index), mCount(array.getItemCount())
    {
    }
 
    operator bool() const
    {
        return array && (mIndex < mCount);
    }
 
    bool operator==(const ArrayIterator& rhs) const
    {
        return array == rhs.array && mIndex == rhs.mIndex;
    }
 
    bool operator!=(const ArrayIterator& rhs) const
    {
        return !operator==(rhs);
    }
 
    const ItemType operator*() const
    {
        if(!array) {
            return {};
        }
        return (*array)[mIndex];
    }
 
    ItemType operator*()
    {
        if(!array) {
            abort();
        }
        return (*array)[mIndex];
    }
 
    unsigned index() const
    {
        return mIndex;
    }
 
    ArrayIterator& operator++()
    {
        ++mIndex;
        return *this;
    }
 
    ArrayIterator operator++(int)
    {
        ArrayIterator tmp(*this);
        ++mIndex;
        return tmp;
    }
 
private:
    ArrayType* array{};
    unsigned mIndex{0};
    const unsigned mCount{0};
};
 
} // namespace ConfigDB