Method operator<

libCacheSim/dataStructure/sparsepp/spp.h:1665–1670

    }

    bool operator<(const sparsegroup& x) const
    {
        // also from <algorithm>
        return std::lexicographical_compare(_group, _group + _num_items(),
                                            x._group, x._group + x._num_items());
    }

    bool operator!=(const sparsegroup& x) const { return !(*this == x); }
    bool operator<=(const sparsegroup& x) const { return !(x < *this); }