...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::is_unit_of_dimension — Check that a type is a unit of the specified dimension.
// In header: <boost/units/is_unit_of_dimension.hpp> template<typename T, typename Dim> struct is_unit_of_dimension : public false_ { };