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    1 #include <quan/meta/mpl/unit.hpp>
    2 #include <boost/mpl/vector_c.hpp>
    3 #include <boost/mpl/int.hpp>
    4 #include <quan_matters/test/concepts/static_unit_concept.hpp>
    5 #include <quan/fixed_quantity/operations.hpp>
    6 #include <iostream>
    7 // demo of using an mpl vector_c for a simple quantity
    8 int main()
    9 {
   10     typedef quan::meta::mpl::unit<
   11         boost::mpl::vector_c<int,1,0,0,0,0,0,0,0>
   12     > length_unit;
   13 
   14      typedef quan::meta::mpl::unit<
   15         boost::mpl::vector_c<int,2,0,0,0,0,0,0,0>
   16     > area_unit;
   17 // concept checking on units
   18     quan::meta::StaticUnitConcept<length_unit>();
   19     quan::meta::StaticUnitConcept<area_unit>();
   20 
   21     typedef quan::fixed_quantity<length_unit,double> length;
   22     typedef quan::fixed_quantity<area_unit,double> area;
   23     length length1(1);
   24     length length2(2);
   25     length length3 =length1 + length2;
   26     std::cout << length3.numeric_value() <<'\n';
   27     area a = length1 * length2;
   28     std::cout << "length  ratio = " << length1 / length2 <<'\n';
   29     std::cout << " area value = " << a.numeric_value() << '\n';
   30     area a2 = quan::pow<2>(length1);
   31     // division not available for simple mpl::integral_c types
   32     //length length4 = quan::pow<1,2>(a2);
   33 
   34 }
   35 
   36