#pragma once
#include <BWAPI/Position.h>

namespace BWAPI
{
  class UnitInterface;
  typedef UnitInterface *Unit;

  /// PositionOrUnit is a class that is either a Position OR a Unit. The purpose of this class is
  /// to reduce interface overhead by combining two commonly passed values into one, and to allow
  /// more function overloads with little effort.
  class PositionOrUnit
  {
  public:
    // constructors
    PositionOrUnit(Unit unit = nullptr);
    PositionOrUnit(Position pos);

    // operators
    PositionOrUnit &operator =(Unit pUnit);
    PositionOrUnit &operator =(Position pos);

    // members (unit)
    bool isUnit() const;
    Unit getUnit() const;

    // members (position)
    bool isPosition() const;
    Position getPosition() const;
  private:
    union
    {
      struct
      {
        int x, y;
      } position;
      struct
      {
        Unit pUnit;
        int y;
      } unit;
    };
  };

}