typedef uint16 StationID;

static const StationID INVALID_STATION = 0xFFFF;

typedef uint16 RoadStopID;

typedef uint16 TownID;

typedef uint16 IndustryID;

typedef uint16 DepotID;

typedef uint16 WaypointID;

typedef uint16 OrderID;

typedef uint16 SignID;

typedef uint16 GroupID;

typedef uint16 EngineRenewID;

typedef uint16 DestinationID;

/* DestinationID must be at least as large as every these below, because it can

 * be any of them

 */

assert_compile(sizeof(DestinationID) == sizeof(DepotID));

assert_compile(sizeof(DestinationID) == sizeof(WaypointID));

assert_compile(sizeof(DestinationID) == sizeof(StationID));

typedef int32 WindowNumber;

enum {

	INVALID_YEAR = -1,