/**

 * \file manual.c

 */

typedef struct Object Object;   //!< Object type

typedef struct Vehicle Vehicle; //!< Vehicle type

typedef struct Car Car;         //!< Car type

typedef struct Truck Truck;     //!< Truck type

/*!

 * Base object class.

 */

struct Object

{

  int ref;    //!< \private Reference count.

};

/*!

 * Increments object reference count by one.

 * \public \memberof Object

 */

static Object * objRef(Object *obj);

/*!

 * Decrements object reference count by one.

 * \public \memberof Object

 */

static Object * objUnref(Object *obj);

/*!

 * Vehicle class.

 * \extends Object

 */

struct Vehicle

{

  Object base;    //!< \protected Base class.

};

/*!

 * Starts the vehicle.

 * \public \memberof Vehicle

 */

void vehicleStart(Vehicle *obj);

/*!

 * Stops the vehicle.

 * \public \memberof Vehicle

 */

void vehicleStop(Vehicle *obj);

/*!

 * Car class.

 * \extends Vehicle

 */

struct Car

{

  Vehicle base;    //!< \protected Base class.

};

/*!

 * Truck class.

 * \extends Vehicle

 */

struct Truck

{

  Vehicle base;    //!< \protected Base class.

};

/*!

 * Main function.

 *

 * Ref vehicleStart(), objRef(), objUnref().

 */

int main(void)

{

  Car c;

  vehicleStart((Vehicle*) &c);

}