...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::tag::tail_variate
// In header: <boost/accumulators/statistics_fwd.hpp> template<typename VariateType, typename VariateTag, typename LeftRight> struct tail_variate : public boost::accumulators::depends_on< tail< LeftRight > > { };