...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::lambda::plain_return_type_2<arithmetic_action< divide_action >, boost::units::unit< Dim, System >, Y>
// In header: <boost/units/lambda.hpp> template<typename System, typename Dim, typename Y> struct plain_return_type_2<arithmetic_action< divide_action >, boost::units::unit< Dim, System >, Y> { // types typedef boost::units::divide_typeof_helper< boost::units::unit< Dim, System >, Y >::type type; };