A sample node updater.
This class serves to show the interface a node update functor needs to support.
Defined in: sample_trie_node_update.hpp
| Parameter | Description | Default Value | 
| class Const_Node_Iterator | Const node iterator type. | - | 
| class Node_Iterator | Node iterator type. | - | 
| class E_Access_Traits | Comparison functor. | - | 
| class Allocator | Allocator type. | - | 
| Type | Definition | Description | 
| metadata_type | size_t | Metadata type. This can be any type; size_t is merely an example. | 
| Method | Description | 
| sample_trie_node_update () | Default constructor. Must be default constructable. | 
| Method | Description | 
| 
inline void
  operator()
  (node_iterator node_it,
    const_node_iterator end_nd_it) const
 | Updates the rank of a node through a node_iterator node_it; end_nd_it is the end node iterator. |