...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::accumulators::features
// In header: <boost/accumulators/framework/features.hpp> template<typename Feature1, typename Feature2, ... > struct features : public mpl::vector< Feature1, Feature2,... > { };