...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::units::us::yard_base_unit
// In header: <boost/units/base_units/us/yard.hpp> struct yard_base_unit : public boost::units::base_unit< yard_base_unit, si::meter_base_unit::dimension_type,-501 > { // public static functions static const char * name(); static const char * symbol(); };