...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::mass_base_dimension — base dimension of mass
// In header: <boost/units/physical_dimensions/mass.hpp> struct mass_base_dimension : public boost::units::base_dimension< mass_base_dimension,-8 > { };