86   LinkNode() : previous_(0), next_(0) {}  in LinkNode()
88       : previous_(previous), next_(next) {}  in LinkNode()
92     this->next_ = e;  in InsertBefore()
94     e->previous_->next_ = this;  in InsertBefore()
100     this->next_ = e->next_;  in InsertAfter()
102     e->next_->previous_ = this;  in InsertAfter()
103     e->next_ = this;  in InsertAfter()
108     this->previous_->next_ = this->next_;  in RemoveFromList()
109     this->next_->previous_ = this->previous_;  in RemoveFromList()
117     return next_;  in next()
133     previous_ = prev; next_ = next;  in set()
138   LinkNode<T>* next_;  variable