...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::numeric::functional::as_zero_base
// In header: <boost/accumulators/numeric/functional.hpp> template<typename Arg, typename EnableIf> struct as_zero_base : public std::unary_function< Arg, remove_const< Arg >::type > { // public member functions remove_const< Arg >::type operator()(Arg &) const; };