cube_direction.h

#ifndef CATA_SRC_CUBE_DIRECTION_H
#define CATA_SRC_CUBE_DIRECTION_H

#include <functional>

#include "enum_traits.h"

namespace om_direction
{
enum class type : int;
} // namespace om_direction

// We have other direction enums, but for this purpose we need to have one for
// the six rectilinear directions.  These correspond to the faces of a cube, so
// I've called it cube_direction
enum class cube_direction : int {
    north,
    east,
    south,
    west,
    above,
    below,
    last
};

template<>
struct enum_traits<cube_direction> {
    static constexpr cube_direction last = cube_direction::last;
};

namespace std
{
template <> struct hash<cube_direction> {
    std::size_t operator()( const cube_direction &d ) const {
        return static_cast<std::size_t>( d );
    }
};
} // namespace std

cube_direction operator+( cube_direction, om_direction::type );
cube_direction operator+( cube_direction, int i );
cube_direction operator-( cube_direction, om_direction::type );
cube_direction operator-( cube_direction, int i );

#endif // CATA_SRC_CUBE_DIRECTION_H