Move.hpp

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#ifndef MOVE_HPP
#define MOVE_HPP
 
#include <Coord.hpp>
#include <TypePiece.hpp>

enum class TypeMove
{
  NORMAL,

  SPLIT,

  MERGE,

  PROMOTE
};

struct Move
{
  Move() = default;
  Move(Move const &) = default;
  Move &operator=(Move const &) = default;
  Move(Move &&) = default;
  Move &operator=(Move &&) = default;
  TypeMove type;

  union
  {
    struct
    {
      Coord src;

      Coord arv;
    } normal;

    struct
    {
      Coord src;

      Coord arv1;

      Coord arv2;
    } split;

    struct
    {
      Coord src1;

      Coord src2;

      Coord arv;
    } merge;

    struct
    {
      Coord src;

      Coord arv;

      TypePiece piece;
    } promote;
  };
 
  bool operator==(Move const &m) const noexcept;
};
 
constexpr inline Move Move_classic(Coord const &src, Coord const &arv)
{
  Move move;
  move.type = TypeMove::NORMAL;
  move.normal.src = src;
  move.normal.arv = arv;
  return move;
}
 
constexpr inline Move Move_split(Coord const &src, Coord const &arv1, Coord const &arv2)
{
  Move move;
  move.type = TypeMove::SPLIT;
  move.split.src = src;
  move.split.arv1 = arv1;
  move.split.arv2 = arv2;
  return move;
}
 
constexpr inline Move Move_merge(Coord const &src1, Coord const &src2, Coord const &arv)
{
  Move move;
  move.type = TypeMove::MERGE;
  move.merge.src1 = src1;
  move.merge.src2 = src2;
  move.merge.arv = arv;
  return move;
}
 
constexpr inline Move Move_promote(Coord const &src, Coord const &arv, TypePiece promotion)
{
  Move move;
  move.type = TypeMove::PROMOTE;
  move.promote.src = src;
  move.promote.arv = arv;
  move.promote.piece = promotion;
  return move;
}
 
#endif