#define BOOST_KARMA_NUMERICS_LOOP_UNROLL 0
#include <boost/fusion/include/adapt_adt.hpp>
#include <boost/spirit/include/support_adapt_adt_attributes.hpp>

#include <boost/fusion/include/adapt_struct.hpp>
#include <boost/spirit/include/karma.hpp>

struct X
{
    short x;

    explicit X(short num = 0) : x(num) {} 
    short getx() const { return x; }
    void  setx(short v) { x = v; }
};

BOOST_FUSION_ADAPT_ADT(X, (short, short, obj.getx(), obj.setx(val)))

int main()
{
    namespace karma = boost::spirit::karma;

    X value(-29);
    std::cout << karma::format(karma::short_, value) << std::endl;
}