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Struct template make_system



template<typename BaseUnit0, typename BaseUnit1, typename BaseUnit2, ... , 
         typename BaseUnitN> 
struct make_system {
  // types
  typedef unspecified type;


Metafunction returning a homogeneous system that can represent any combination of the base units. There must be no way to represent any of the base units in terms of the others. make_system<foot_base_unit, meter_base_unit>::type is not allowed, for example.