...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::lazy_weighted_variance>
struct feature_of<tag::lazy_weighted_variance> : public boost::accumulators::boost::accumulators::feature_of< tag::lazy_variance > { };