Struct template member_value_traits

Boost C++ Libraries

Struct template member_value_traits

boost::intrusive::member_value_traits

Synopsis

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

template<typename T, typename NodeTraits, 
         typename NodeTraits::node T::* PtrToMember, 
         link_mode_type LinkMode = safe_link> 
struct member_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 pointer_traits< node_ptr >::template rebind_pointer< T >::type       pointer;        
  typedef pointer_traits< node_ptr >::template rebind_pointer< const T >::type const_pointer;  
  typedef value_type &                                                         reference;      
  typedef const value_type &                                                   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 store a node_traits::node

`member_value_traits` public static functions

static node_ptr to_node_ptr(reference value);

static const_node_ptr to_node_ptr(const_reference value);

static pointer to_value_ptr(const node_ptr & n);

static const_pointer to_value_ptr(const const_node_ptr & n);