Function GetTileRailType

src/rail.cpp:37–60

* Return the rail type of tile, or INVALID_RAILTYPE if this is no rail tile. */

 * Return the rail type of tile, or INVALID_RAILTYPE if this is no rail tile.
 */
RailType GetTileRailType(Tile tile)
{
	switch (GetTileType(tile)) {
		case MP_RAILWAY:
			return GetRailType(tile);

		case MP_ROAD:
			/* rail/road crossing */
			if (IsLevelCrossing(tile)) return GetRailType(tile);
			break;

		case MP_STATION:
			if (HasStationRail(tile)) return GetRailType(tile);
			break;

		case MP_TUNNELBRIDGE:
			if (GetTunnelBridgeTransportType(tile) == TRANSPORT_RAIL) return GetRailType(tile);
			break;

		default:
			break;
	}
	return INVALID_RAILTYPE;
}

/**
 * Finds out if a company has a certain buildable railtype available.