Method operator<

inst/include/Rcpp/vector/MatrixBase.h:157–159

                return ( i != y.i || j != y.j ) ;
            }
            inline bool operator<( const iterator& other ) const {
                return index() < other.index() ;
            }
            inline bool operator>( const iterator& other ) const {
                return index() > other.index() ;
            }