effect_action.h

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#ifndef OSL_EFFECT_ACTION
#define OSL_EFFECT_ACTION
#include "osl/numEffectState.h"
 
namespace osl
{
  namespace effect_action
  {
    template<class Action>
    class AlwaysMove
    {
    private:
      const NumEffectState& state;
      Action& ac;
    public:
      AlwaysMove(const NumEffectState& s, Action & a) : state(s), ac(a) {}
      template<Player P,Ptype Type>
      void doActionPtype(Piece p1,Square to){
        assert(Type == unpromote(p1.ptype()));
        Square from=p1.square(); 
        if (canPromote(Type) &&
           !p1.isPromotedNotKingGold() &&
           (to.canPromote<P>() || from.canPromote<P>())){
          ac.unknownMove(from,to,state.pieceAt(to),promote(Type),true,P);
        }
        if (!canPromote(Type) ||
           PtypePlayerTraits<Type,P>::canDropTo(to) ||
           p1.isPromotedNotKingGold()){
          ac.unknownMove(from,to,state.pieceAt(to),p1.ptype(),false,P);
        }
      }

      template<Player P>
      void doAction(Piece p1,Square to)
      {
        Square from=p1.square(); 
        Ptype ptype=p1.ptype();
        if(canPromote(ptype))
        {
          if (to.canPromote<P>())
          {
            ac.unknownMove(from,to,state.pieceAt(to),promote(ptype),true,P);
            if(Ptype_Table.canDropTo(P, ptype,to))
            {
              ac.unknownMove(from,to,state.pieceAt(to),ptype,false,P);
            }
          }
          else if (from.canPromote<P>())
          {
            ac.unknownMove(from,to,state.pieceAt(to),promote(ptype),true,P);
            ac.unknownMove(from,to,state.pieceAt(to),ptype,false,P);
          }
          else
          {
            ac.unknownMove(from,to,state.pieceAt(to),ptype,false,P);
          }
        }
        else
        {
          ac.unknownMove(from,to,state.pieceAt(to),ptype,false,P);
        }
      }
      bool done() const{ return false; }
    };

    template<class Action>
    class BetterToPromote
    {
    private:
      const NumEffectState& state;
      Action & ac;
    public:
      BetterToPromote(const NumEffectState& s, Action& a) 
        : state(s), ac(a)
      {
      }
      template<Player P,Ptype Type>
      void doActionPtype(Piece p1,Square to){
        assert(Type == unpromote(p1.ptype()));
        Square from=p1.square(); 
        Piece target = state.pieceAt(to);
        if (canPromote(Type) &&
           !p1.isPromotedNotKingGold() &&
           (to.canPromote<P>() || from.canPromote<P>())){
          ac.unknownMove(from,to,target,promote(Type),true,P);
        }
        if (!canPromote(Type) ||
           PtypePlayerTraits<Type,P>::canDropTo(to) ||
           p1.isPromotedNotKingGold()){
          if (! (to.canPromote<P>() || from.canPromote<P>())
              || (! PtypeTraits<Type>::betterToPromote
                  && (p1.ptype() != LANCE
                      || PtypePlayerTraits<LANCE,P>::canDropTo(to + DirectionPlayerTraits<U,P>::offset()))))
            ac.unknownMove(from,to,target,p1.ptype(),false,P);
        }
      }

      template<Player P>
      void doAction(Piece p1,Square to)
      {
        Square from=p1.square(); 
        Ptype ptype=p1.ptype();
        Piece target = state.pieceAt(to);
        if(canPromote(ptype))
        {
          if (to.canPromote<P>())
          {
            ac.unknownMove(from,to,target,promote(ptype),true,P);
            if(Ptype_Table.canDropTo(P, ptype,to)
               && ! Ptype_Table.isBetterToPromote(ptype)
               && (ptype != LANCE
                   || PtypePlayerTraits<LANCE,P>::canDropTo(to + DirectionPlayerTraits<U,P>::offset())))
 
            {
              ac.unknownMove(from,to,target,ptype,false,P);
            }
            return;
          }
          if (from.canPromote<P>())
          {
            ac.unknownMove(from,to,target,promote(ptype),true,P);
            if(! Ptype_Table.isBetterToPromote(ptype)
               && (ptype != LANCE
                   || PtypePlayerTraits<LANCE,P>::canDropTo(to + DirectionPlayerTraits<U,P>::offset())))
              ac.unknownMove(from,to,target,ptype,false,P);
            return;
          }
          // fall through
        }
        ac.unknownMove(from,to,target,ptype,false,P);
      }
    };

    struct StorePiece
    {
      PieceVector *store;
      explicit StorePiece(PieceVector *s) : store(s)
      {
      }
      template<Player P,Ptype Type>
      void doActionPtype(Piece p, Square pos)
      {
        doAction<P>(p, pos);
      }
      template<Player P>
      void doAction(Piece p, Square)
      {
        store->push_back(p);
      }
    };

    struct StorePtypeOSquare
    {
      PtypeOSquareVector *out;
      Square target;
      StorePtypeOSquare(PtypeOSquareVector *s, Square t) 
        : out(s), target(t)
      {
      }
      template<Player P,Ptype Type>
      void doActionPtype(Piece p)
      {
        store(p);
      }
      template<Player P>
      void doAction(Piece p, Square)
      {
        store(p);
      }
    
      void store(Piece p)
      {
        const PtypeO ptypeO = p.ptypeO();
        out->push_back(std::make_pair(ptypeO, p.square()));
      }
    };
  } // namespace effect_action
} // namespace osl
#endif // OSL_EFFECT_ACTION
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