Class iterator

inst/include/Rcpp/vector/MatrixBase.h:83–189

        }

        class iterator {
        public:
            typedef stored_type reference ;
            typedef stored_type* pointer ;
            typedef R_xlen_t difference_type ;
            typedef stored_type value_type;
            typedef std::random_access_iterator_tag iterator_category ;

            iterator( const MatrixBase& object_, R_xlen_t index_ ) :
                object(object_), i(0), j(0), nr(object_.nrow()), nc(object_.ncol()) {

                update_index( index_) ;
            }

            iterator( const iterator& other) :
                object(other.object), i(other.i), j(other.j), nr(other.nr), nc(other.nc){}

            inline iterator& operator++(){
                i++ ;
                if( i == nr ){
                    j++ ;
                    i=0 ;
                }
                return *this ;
            }
            inline iterator operator++(int){
                iterator orig(*this) ;
                ++(*this) ;
                return orig ;
            }

            inline iterator& operator--(){
                i-- ;
                if( i == -1 ){
                    j-- ;
                    i = nr - 1 ;
                }
                return *this ;
            }
            inline iterator operator--(int){
                iterator orig(*this) ;
                --(*this) ;
                return orig ;
            }

            inline iterator operator+(difference_type n) const {
                return iterator( object, i + (j*nr) + n ) ;
            }
            inline iterator operator-(difference_type n) const {
                return iterator( object, i + (j*nr) - n ) ;
            }

            inline iterator& operator+=(difference_type n) {
                update_index( i + j*nr + n );
                return *this ;
            }
            inline iterator& operator-=(difference_type n) {
                update_index( i + j*nr - n );