...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::astronomical::light_second_base_unit
// In header: <boost/units/base_units/astronomical/light_second.hpp> struct light_second_base_unit { // public static functions static const char * name() ; static const char * symbol() ; };