Function IsWagon

src/engine.cpp:624–628

* Determine whether an engine type is a wagon (and not a loco). * @param index %Engine getting queried. * @return Whether the queried engine is a wagon. */

 * @return Whether the queried engine is a wagon.
 */
static bool IsWagon(EngineID index)
{
	const Engine *e = Engine::Get(index);
	return e->type == VEH_TRAIN && e->VehInfo<RailVehicleInfo>().railveh_type == RAILVEH_WAGON;
}

/**
 * Ensure engine is not set as the last used variant for any other engine.