540       : current_(other.current_), next_(other.next_) {}  in iterator()
542   Edge operator*() const { return Edge(current_, current_->input_ptr()); }
544     return current_ == other.current_;
548     DCHECK_NOT_NULL(current_);
549     current_ = next_;
550     next_ = current_ ? current_->next : nullptr;
558   iterator() : current_(nullptr), next_(nullptr) {}  in iterator()
560       : current_(node->first_use_),  in iterator()
561         next_(current_ ? current_->next : nullptr) {}  in iterator()
563   Node::Use* current_;  variable
588       : current_(other.current_)  in const_iterator()
596   Node* operator*() const { return current_->from(); }
598     return other.current_ == current_;
601     return other.current_ != current_;
604     DCHECK_NOT_NULL(current_);
607     current_ = current_->next;
609     DCHECK_EQ(current_, next_);
610     next_ = current_ ? current_->next : nullptr;
619   const_iterator() : current_(nullptr) {}  in const_iterator()
621       : current_(node->first_use_)  in const_iterator()
624         next_(current_ ? current_->next : nullptr)  in const_iterator()
629   Node::Use* current_;  variable