Method _insert

libCacheSim/dataStructure/sparsepp/spp.h:3191–3201

    // (1) Iterator supports operator-, resize before inserting
    template <class ForwardIterator>
    void _insert(ForwardIterator f, ForwardIterator l, std::forward_iterator_tag /*unused*/)
    {
        int64_t dist = std::distance(f, l);
        if (dist < 0 ||  static_cast<size_t>(dist) >= (std::numeric_limits<size_type>::max)())
            throw_exception(std::length_error("insert-range overflow"));

        _resize_delta(static_cast<size_type>(dist));

        for (; dist > 0; --dist, ++f)
            _insert_noresize(*f);
    }

    // (2) Arbitrary iterator, can't tell how much to resize
    template <class InputIterator>