Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
This is an older version of Boost and was released in 2021. The current version is 1.89.0.
boost::accumulators::tag::as_droppable
// In header: <boost/accumulators/framework/accumulators/droppable_accumulator.hpp> template<typename Feature> struct as_droppable { // types typedef droppable< Feature > type; };