326 struct SplitStringIter : public std::iterator<std::forward_iterator_tag, std::string_view> {  struct
331   SplitStringIter(size_t index, char split, std::string_view sv)  in SplitStringIter()  function
333   SplitStringIter(const SplitStringIter&) = default;
334   SplitStringIter(SplitStringIter&&) = default;
335   SplitStringIter& operator=(SplitStringIter&&) = default;  argument
336   SplitStringIter& operator=(const SplitStringIter&) = default;  argument
338   SplitStringIter& operator++() {
348   SplitStringIter operator++(int) {
349     SplitStringIter ret(cur_index_, split_on_, sv_);
354   bool operator==(const SplitStringIter& other) const {
358   bool operator!=(const SplitStringIter& other) const {
374 inline IterationRange<SplitStringIter> SplitString(std::string_view sv, char target) {  in SplitString()  argument
375   return MakeIterationRange(SplitStringIter(0, target, sv),  in SplitString()
376                             SplitStringIter(std::string_view::npos, target, sv));  in SplitString()