// In header: <boost/date_time/time_resolution_traits.hpp>
template<typename frac_sec_type, time_resolutions res, 
         #if(defined(BOOST_MSVC)&&(_MSC_VER< 1300)) boost::int64_t resolution_adjust, 
         #else typename frac_sec_type::int_type resolution_adjust, 
         #endif unsigned short frac_digits, 
         typename var_type = boost::int32_t> 
class time_resolution_traits {
public:
  // types
  typedef frac_sec_type::int_type  fractional_seconds_type;
  typedef frac_sec_type::int_type  tick_type;              
  typedef frac_sec_type::impl_type impl_type;              
  typedef var_type                 day_type;               
  typedef var_type                 hour_type;              
  typedef var_type                 min_type;               
  typedef var_type                 sec_type;               
  // public static functions
  static fractional_seconds_type as_number(impl_type);
  static bool is_adapted();
  static time_resolutions resolution();
  static unsigned short num_fractional_digits();
  static fractional_seconds_type res_adjust();
  static tick_type 
  to_tick_count(hour_type, min_type, sec_type, fractional_seconds_type);
  // public member functions
   BOOST_STATIC_CONSTANT(boost::int64_t, ticks_per_second = resolution_adjust);
   BOOST_STATIC_CONSTANT(fractional_seconds_type, 
                         ticks_per_second = resolution_adjust);
};