...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::units::operator*
// In header: <boost/units/lambda.hpp> template<typename System, typename Dim, typename Arg> const multiply_typeof_helper< boost::units::absolute< boost::units::unit< Dim, System > >, boost::lambda::lambda_functor< Arg > >::type operator*(const boost::units::absolute< boost::units::unit< Dim, System > > & a, const boost::lambda::lambda_functor< Arg > & b);