...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::solid_angle_base_dimension — base dimension of solid angle
// In header: <boost/units/physical_dimensions/solid_angle.hpp> struct solid_angle_base_dimension : public boost::units::base_dimension< solid_angle_base_dimension,-1 > { };