/* Some declarations of functions, so we can make them friendly */

struct SaveLoad;

struct GroundVehicleCache;

extern const SaveLoad *GetVehicleDescription(VehicleType vt);

struct LoadgameState;

extern bool LoadOldVehicle(LoadgameState *ls, int num);

extern void FixOldVehicles();

/** %Vehicle data structure. */

struct Vehicle : VehiclePool::PoolItem<&_vehicle_pool>, BaseVehicle {

private:

	Vehicle *next;                      ///< pointer to the next vehicle in the chain

	Vehicle *first;                     ///< NOSAVE: pointer to the first vehicle in the chain

	Vehicle *next_shared;               ///< pointer to the next vehicle that shares the order

	Vehicle *previous_shared;           ///< NOSAVE: pointer to the previous vehicle in the shared order chain

public:

	friend const SaveLoad *GetVehicleDescription(VehicleType vt); ///< So we can use private/protected variables in the saveload code

	friend void FixOldVehicles();

	friend void AfterLoadVehicles(bool part_of_load);             ///< So we can set the previous and first pointers while loading

	friend bool LoadOldVehicle(LoadgameState *ls, int num);       ///< So we can set the proper next pointer while loading

	char *name;                         ///< Name of vehicle

		OrderList *list;            ///< Pointer to the order list for this vehicle

		Order     *old;             ///< Only used during conversion of old save games

	} orders;                           ///< The orders currently assigned to the vehicle.

	byte vehicle_flags;                 ///< Used for gradual loading and other miscellaneous things (@see VehicleFlags enum)

	GroupID group_id;                   ///< Index of group Pool array

	byte subtype;                       ///< subtype (Filled with values from #EffectVehicles/#TrainSubTypes/#AircraftSubTypes)

	NewGRFCache grf_cache;              ///< Cache of often used calculated NewGRF values

	VehicleCache vcache;                ///< Cache of often used vehicle values.