...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::accumulator_concept
// In header: <boost/accumulators/framework/accumulator_concept.hpp> template<typename Stat> struct accumulator_concept { // public member functions void constraints() ; Stat stat; };