Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. — Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

Struct template get_system<unit< Dim, System >>

boost::units::get_system<unit< Dim, System >> — Get the system of a unit.

Synopsis

// In header: <boost/units/get_system.hpp>

template<typename Dim, typename System> 
struct get_system<unit< Dim, System >> {
  // types
  typedef System type;
};