63   class Iterator {
65     Iterator(const Iterator&) = default;
66     Iterator(HashSet* hash_set, size_t index) : hash_set_(hash_set), index_(index) {  in Iterator()  function
68     Iterator& operator=(const Iterator&) = default;
69     bool operator==(const Iterator& other) const {
72     bool operator!=(const Iterator& other) const {
75     Iterator operator++() {  // Value after modification.
79     Iterator operator++(int) {
80       Iterator temp = *this;
160   Iterator begin() {  in begin()
161     Iterator ret(this, 0);  in begin()
168   Iterator end() {  in end()
169     return Iterator(this, NumBuckets());  in end()
182   Iterator Erase(Iterator it) {  in Erase()
232   Iterator Find(const K& element) {  in Find()
236   Iterator FindWithHash(const K& element, size_t hash) {  in FindWithHash()
245         return Iterator(this, index);  in FindWithHash()
402   friend class Iterator;  variable