798 	struct iterator;
799 	friend struct Name_set::iterator;
802 	struct iterator {  struct
805 		iterator() : node(0) {}  in iterator()  argument
806 		iterator(entry *node_) : node(node_) {}  in iterator()  argument
807 		iterator(const iterator&) = default;
816 		iterator& operator=(const iterator &o) { node = o.node; return *this; }
819 		int operator==(const iterator &o) const { return (node == o.node); }
820 		int operator!=(const iterator &o) const { return (node != o.node); }
823 		iterator& operator++();
824 		iterator  operator++(int) { iterator it = *this; ++*this; return it; }  argument
841 	iterator begin() const;
842 	iterator end() const { return iterator(); }  in end()