...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_dimension_list<list< Item, Next >>
// In header: <boost/units/is_dimension_list.hpp> template<typename Item, typename Next> struct is_dimension_list<list< Item, Next >> { };