93     using UTF8Iterator = typename UTF8Range<CharIterator>::Iter;
94     class Iter {
99         Iter() : begin_{} {}  in Iter()  function
100         Iter(UTF8Iterator begin, UTF8Iterator end) : begin_(begin), end_(end) {}  in Iter()  function
101         Iter(const Iter& rhs) : begin_(rhs.begin_), end_(rhs.end_) {}  in Iter()  function
102         Iter& operator=(const Iter& rhs) {
108         Iter& operator++() {
125         Iter operator++(int) {
126             Iter dummy = *this;
130         bool operator==(const Iter& rhs) const { return begin_ == rhs.begin_; }
131         bool operator!=(const Iter& rhs) const { return !(*this == rhs); }
133     Iter begin() const { return Iter(range_.begin(), range_.end()); }  in begin()
134     Iter end() const { return Iter(range_.end(), range_.end()); }  in end()