48 class node_handle_base {
56     node_handle_base() : my_node(nullptr), my_allocator() {}  in node_handle_base()  function
57     node_handle_base(node_handle_base&& nh) : my_node(nh.my_node),  in node_handle_base()  function
65     ~node_handle_base() { internal_destroy(); }  in ~node_handle_base()
67     node_handle_base& operator=( node_handle_base&& nh ) {
75     void swap( node_handle_base& nh ) {  in swap()
86     node_handle_base( node* n ) : my_node(n) {}  in node_handle_base()  function
106 class node_handle : public node_handle_base<Value, Node, Allocator> {
107     using base_type = node_handle_base<Value, Node, Allocator>;
133 class node_handle<Key, Key, Node, Allocator> : public node_handle_base<Key, Node, Allocator> {
134     using base_type = node_handle_base<Key, Node, Allocator>;