Struct template is_dimensionless

Struct template is_dimensionless_quantity

boost::units::is_dimensionless_quantity — Check that a type is a dimensionless quantity.

Synopsis

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

template<typename T> 
struct is_dimensionless_quantity :
  public boost::units::is_quantity_of_dimension< T, dimensionless_type >
{
};