ItemVectorWithPredecessor::ItemVectorWithPredecessor(const ItemVector& add, ItemVectorWithPredecessor *predecessor) : m_predecessor(predecessor), m_numberOfItemSizes(predecessor->m_numberOfItemSizes) { m_itemCount = new int[m_numberOfItemSizes]; for(int i = 0; i < m_numberOfItemSizes; ++i) { m_itemCount[i] = predecessor->m_itemCount[i] + add.itemCount(i); } }