480       : current_(other.current_), next_(other.next_) {}  in iterator()
482   Edge operator*() const { return Edge(current_, current_->input_ptr()); }
484     return current_ == other.current_;
488     DCHECK_NOT_NULL(current_);
489     current_ = next_;
490     next_ = current_ ? current_->next : nullptr;
498   iterator() : current_(nullptr), next_(nullptr) {}  in iterator()
500       : current_(node->first_use_),  in iterator()
501         next_(current_ ? current_->next : nullptr) {}  in iterator()
503   Node::Use* current_;  variable
527   const_iterator(const const_iterator& other) : current_(other.current_) {}  in const_iterator()
529   Node* operator*() const { return current_->from(); }
531     return other.current_ == current_;
534     return other.current_ != current_;
537     DCHECK_NOT_NULL(current_);
538     current_ = current_->next;
546   const_iterator() : current_(nullptr) {}  in const_iterator()
547   explicit const_iterator(Node* node) : current_(node->first_use_) {}  in const_iterator()
549   Node::Use* current_;  variable