This inheritance list is sorted roughly, but not completely, alphabetically:
[detail level 12]
  std::common_type< units::unit< Rep1, Ratio1, UnitType1 >, units::unit< Rep2, Ratio2, UnitType2 > > |  | 
  units::unit_type::distance |  | 
  false_type |  | 
   units::is_unit< T > |  | 
  units::unit_type::mass |  | 
  true_type |  | 
   units::is_unit< unit< Rep, Ratio, UnitType > > |  | 
  units::unit< Rep, Ratio, UnitType > |  | 
  std::unit_common_type< CommonRep, Ratio1, Ratio2, UnitType > |  |