...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::cgs::gram_base_unit
// In header: <boost/units/base_units/cgs/gram.hpp> struct gram_base_unit { // public static functions static std::string name() ; static std::string symbol() ; };