35         LinkNode* next;  member
46             LinkNode* next;  in ~Map()  local
48                 next = p->next;  in ~Map()
50                 p = next;  in ~Map()
65             node = node->next;
70         node->next = nullptr;
74             prev->next = node;
83             LinkNode* next;  variable
85             next = node->next;
86             if (next != nullptr) {
87                 node = next;
92                 next = map->bucket[bucket_index];
93                 if (next != nullptr) {
94                     node = next;
151             node = node->next;  in find()