36     struct node {  struct
39         node* prev;  argument
40         node* next;  argument
41         node(T t, T2 t2,node* p, node* n) :  in node()  argument
44     node* head;
45     node* tail;
46     node* tmp;
68             node* temp(head);  in ~Map()
148     tail = new node(data, data2,tail, NULL);  in insert()
167     node* prevnode = tmp;  in erase()
168     node *tempnode;  in erase()
222     node *tempnode;  in eraseall()