Instance observer

ZFClass supply methods to observe event that any of specified class has created:

ZFLISTENER(objCreated) {
    zfLog() << "MyClass created: " << zfargs.sender();
} ZFLISTENER_END()
MyClass::ClassData()->instanceObserverAdd(objCreated);
 
zfobj<MyClass> p0; // would cause objCreated being called
zfobj<SomeTypeOfMyClass> p1; // would cause objCreated being called
zfobj<NotTypeOfMyClass> p2; // would not cause objCreated being called