// In header: <boost/intrusive/pointer_plus_bits.hpp>
template<typename T, std::size_t NumBits> 
struct pointer_plus_bits<T *, NumBits> {
  // types
  typedef T * pointer;
  // public static functions
  static pointer get_pointer(pointer);
  static void set_pointer(pointer &, pointer);
  static std::size_t get_bits(pointer);
  static void set_bits(pointer &, std::size_t);
  // public data members
  static const uintptr_t Mask;
};