Struct template subtract_typeof_helper<quantity< unit< Dim, System >, X >, quantity< unit< Dim, System >, Y >>
boost::units::subtract_typeof_helper<quantity< unit< Dim, System >, X >, quantity< unit< Dim, System >, Y >>
Synopsis
template<typename Dim, typename System, typename X, typename Y>
struct subtract_typeof_helper<quantity< unit< Dim, System >, X >, quantity< unit< Dim, System >, Y >> {
// types
typedef subtract_typeof_helper< X, Y >::type value_type;
typedef unit< Dim, System > unit_type;
typedef quantity< unit_type, value_type > type;
};