#ifndef TEMP_SIGN_HPP_INCLUDED_19JUN08
#define TEMP_SIGN_HPP_INCLUDED_19JUN08

#include <boost/cstdint.hpp>
#include <boost/mpl/int.hpp>
#include <boost/mpl/if.hpp>

namespace temp {
  
  struct positive_type : boost::mpl::int_<+1> {};
  struct negative_type : boost::mpl::int_<-1> {};

  template<boost::intmax_t N>
  struct sign
  {
    typedef typename
    boost::mpl::if_c<
        (N > 0), positive_type, negative_type
      >::type
    type;

    BOOST_STATIC_CONSTANT(int, value = type::value);
  };

} // namespace temp

#endif // TEMP_SIGN_HPP_INCLUDED_19JUN08