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Struct template derivation_value_traits

boost::intrusive::derivation_value_traits

Synopsis

// In header: <boost/intrusive/derivation_value_traits.hpp>

template<typename T, typename NodeTraits, link_mode_type LinkMode = safe_link> 
struct derivation_value_traits {
  // types
  typedef NodeTraits                                                   node_traits;    
  typedef T                                                            value_type;     
  typedef node_traits::node                                            node;           
  typedef node_traits::node_ptr                                        node_ptr;       
  typedef node_traits::const_node_ptr                                  const_node_ptr; 
  typedef boost::pointer_to_other< node_ptr, T >::type                 pointer;        
  typedef boost::pointer_to_other< node_ptr, const T >::type           const_pointer;  
  typedef boost::intrusive::pointer_traits< pointer >::reference       reference;      
  typedef boost::intrusive::pointer_traits< const_pointer >::reference const_reference;

  // public static functions
  static node_ptr to_node_ptr(reference);
  static const_node_ptr to_node_ptr(const_reference);
  static pointer to_value_ptr(const node_ptr &);
  static const_pointer to_value_ptr(const const_node_ptr &);

  // public data members
  static const link_mode_type link_mode;
};

Description

This value traits template is used to create value traits from user defined node traits where value_traits::value_type will derive from node_traits::node

derivation_value_traits public static functions

  1. static node_ptr to_node_ptr(reference value);
  2. static const_node_ptr to_node_ptr(const_reference value);
  3. static pointer to_value_ptr(const node_ptr & n);
  4. static const_pointer to_value_ptr(const const_node_ptr & n);

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