final class

[Ganesh]

Is there an equivalent of the "final class" of JAVA in C++?

Ganesh

 

[Kai-Uwe Bux]

Is there an equivalent of the "final class" of JAVA in C++?

a) not really. It's not really that much of a useful concept in C++.

b) Should you find yourself in a situation where you really really need it,
there is a way of faking it: you can prevent construction of objects of
derived classes as follows.

/*
This trick was found in news.lang.c++.moderated (Gennaro Prota)
see:
http://groups.google.com/group/comp...7136?lnk=gst&q=sealed&rnum=3#f63980680a2f7136
*/

class protected_constructor {
protected:

protected_constructor ( void ) {}

}; // protected_constructor


#define FINAL_CLASS private virtual protected_constructor


class X : FINAL_CLASS {};

class Y : public X {};

int main ( void ) {
Y y;
}



Best

Kai-Uwe Bux