#include <Kernel/libkern/c++/OSMetaClass.h> #include <Kernel/libkern/c++/OSObject.h> class Foo : public OSObject { OSDeclareDefaultStructors( Foo ) public: virtual int foo(); #ifdef FOO_USED OSMetaClassDeclareReservedUsed(Foo, 0); virtual int fooUsed0(); #else OSMetaClassDeclareReservedUnused(Foo, 0); #endif OSMetaClassDeclareReservedUnused(Foo, 1); OSMetaClassDeclareReservedUnused(Foo, 2); OSMetaClassDeclareReservedUnused(Foo, 3); };