Struct template add_typeof_helper<quantity< unit< Dim1, System1 >, X >, quantity< unit< Dim2, System2 >, Y >>
boost::units::add_typeof_helper<quantity< unit< Dim1, System1 >, X >, quantity< unit< Dim2, System2 >, Y >>
Synopsis
template<typename Dim1, typename System1, typename Dim2, typename System2,
typename X, typename Y>
struct add_typeof_helper<quantity< unit< Dim1, System1 >, X >, quantity< unit< Dim2, System2 >, Y >> {
};
Description
for sun CC we need to invoke SFINAE at the top level, otherwise it will silently return int.