Function ScriptOrderPositionToRealOrderPosition

src/script/api/script_order.cpp:85–96

* Convert an ScriptOrder::OrderPosition (which is the manual order index) to an order index * as expected by the OpenTTD commands. * @param order_position The OrderPosition to convert. * @return An OpenTTD-internal index for the same order. */

 * @return An OpenTTD-internal index for the same order.
 */
static int ScriptOrderPositionToRealOrderPosition(VehicleID vehicle_id, ScriptOrder::OrderPosition order_position)
{
	const Vehicle *v = ::Vehicle::Get(vehicle_id);
	if (order_position == v->GetNumManualOrders()) return v->GetNumOrders();

	assert(ScriptOrder::IsValidVehicleOrder(vehicle_id, order_position));

	auto orders = v->Orders();
	auto real_orders = orders | std::views::filter([](const Order &order) { return !order.IsType(OT_IMPLICIT); });
	auto it = std::ranges::next(std::begin(real_orders), order_position, std::end(real_orders));
	return static_cast<int>(std::distance(std::begin(orders), it.base()));
}

/**
 * Convert an order index from OpenTTD to a ScriptOrder::OrderPosition (which is the manual order index)