...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::feature_of<tag::non_coherent_tail_mean< LeftRight >>
// In header: <boost/accumulators/statistics/tail_mean.hpp> template<typename LeftRight> struct feature_of<tag::non_coherent_tail_mean< LeftRight >> { };