140     class const_iterator;  variable
141     inline const_iterator begin() const;
142     inline const_iterator end() const;
348   class const_iterator;  variable
349   inline const_iterator begin() const;
350   inline const_iterator end() const;
492 class Node::Inputs::const_iterator final {
500   const_iterator(const const_iterator& other) : input_ptr_(other.input_ptr_) {}  in const_iterator()  function
503   bool operator==(const const_iterator& other) const {
506   bool operator!=(const const_iterator& other) const {
509   const_iterator& operator++() {
513   const_iterator operator++(int);
514   const_iterator& operator+=(difference_type offset) {
518   const_iterator operator+(difference_type offset) const {
519     return const_iterator(input_ptr_ + offset);
521   difference_type operator-(const const_iterator& other) const {
528   explicit const_iterator(Node* const* input_ptr) : input_ptr_(input_ptr) {}  in const_iterator()  function
534 Node::Inputs::const_iterator Node::Inputs::begin() const {  in begin()
535   return const_iterator(input_root_);  in begin()
539 Node::Inputs::const_iterator Node::Inputs::end() const {  in end()
540   return const_iterator(input_root_ + count_);  in end()
588 class Node::Uses::const_iterator final {
596   const_iterator(const const_iterator& other) : current_(other.current_) {}  in const_iterator()  function
599   bool operator==(const const_iterator& other) const {
602   bool operator!=(const const_iterator& other) const {
605   const_iterator& operator++() {
610   const_iterator operator++(int);
615   const_iterator() : current_(nullptr) {}  in const_iterator()  function
616   explicit const_iterator(Node* node) : current_(node->first_use_) {}  in const_iterator()  function
622 Node::Uses::const_iterator Node::Uses::begin() const {  in begin()
623   return const_iterator(this->node_);  in begin()
627 Node::Uses::const_iterator Node::Uses::end() const { return const_iterator(); }  in end()