156   class const_iterator : public std::iterator<std::random_access_iterator_tag,
163     const_iterator() {}  in const_iterator()  function
164     const_iterator(const BitTable* table, uint32_t row) : table_(table), row_(row) {}  in const_iterator()  function
165     const_iterator operator+(difference_type n) { return const_iterator(table_, row_ + n); }
166     const_iterator operator-(difference_type n) { return const_iterator(table_, row_ - n); }
167     difference_type operator-(const const_iterator& other) { return row_ - other.row_; }
170     const_iterator operator++() { return const_iterator(table_, ++row_); }
171     const_iterator operator--() { return const_iterator(table_, --row_); }
172     const_iterator operator++(int) { return const_iterator(table_, row_++); }
173     const_iterator operator--(int) { return const_iterator(table_, row_--); }
174     bool operator==(const_iterator i) const { DCHECK(table_ == i.table_); return row_ == i.row_; }
175     bool operator!=(const_iterator i) const { DCHECK(table_ == i.table_); return row_ != i.row_; }
176     bool operator<=(const_iterator i) const { DCHECK(table_ == i.table_); return row_ <= i.row_; }
177     bool operator>=(const_iterator i) const { DCHECK(table_ == i.table_); return row_ >= i.row_; }
178     bool operator<(const_iterator i) const { DCHECK(table_ == i.table_); return row_ < i.row_; }
179     bool operator>(const_iterator i) const { DCHECK(table_ == i.table_); return row_ > i.row_; }
199   ALWAYS_INLINE const_iterator begin() const { return const_iterator(this, 0); }  in begin()
200   ALWAYS_INLINE const_iterator end() const { return const_iterator(this, this->NumRows()); }  in end()
220 typename BitTable<Accessor>::const_iterator operator+(
221     typename BitTable<Accessor>::const_iterator::difference_type n,
222     typename BitTable<Accessor>::const_iterator a) {
227 class BitTableRange : public IterationRange<typename BitTable<Accessor>::const_iterator> {
229   typedef typename BitTable<Accessor>::const_iterator const_iterator;  typedef
231   using IterationRange<const_iterator>::IterationRange;
232   BitTableRange() : IterationRange<const_iterator>(const_iterator(), const_iterator()) { }  in BitTableRange()
238     const_iterator it = this->begin() + index;