...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::si::meter_base_unit
// In header: <boost/units/base_units/si/meter.hpp> struct meter_base_unit : public base_unit< meter_base_unit, length_dimension, -9 > { // public static functions static std::string name(); static std::string symbol(); };