#ifndef TEMP_ABS_HPP_INCLUDED_19JUN08
#define TEMP_ABS_HPP_INCLUDED_19JUN08

#include <boost/cstdint.hpp>
#include <boost/mpl/negate.hpp>
#include <boost/mpl/arithmetic.hpp>
#include <boost/mpl/integral_c.hpp>

namespace temp {

  template<boost::intmax_t N>
  struct abs
  {
  private:
    // save instantiating this twice
    typedef boost::mpl::integral_c<boost::intmax_t, N> n_type;
  public:
    typedef typename
    boost::mpl::if_c<
          (N < 0)
        , boost::mpl::negate<n_type>
        , n_type
      >::type
    type;

    BOOST_STATIC_CONSTANT(boost::intmax_t, value = type::value);
  };

} // namespace temp

#endif // TEMP_ABS_HPP_INCLUDED_19JUN08