question about C++

[z0mb13]

is there a keyword (or a way) to define a function such that it cannot be redefined in its child classes???

what I mean is like this:

class Upper {
...
public:
int foo(int a);
....
}

class Lower: public Upper {
....
}

i.e class Lower is a child of Upper, I want it so that function foo cannot be redefined in class Lower (and also other child classes)

TIA

 

[Argo]

Unfortunately in c++ there is no such way. In java, you would use keyword final, but this is one of the shortcomings of c++.

 

[singh]

Originally posted by: Argo
Unfortunately in c++ there is no such way. In java, you would use keyword final, but this is one of the shortcomings of c++.

I'd hardly call it a short-coming. If you make a method public, then it's fair game for any derived classes to redefine it they see fit. If you want to prevent the behavior, then it shouldn't be public in the first place.

 

[manly]

Among other points of interest, here's Scott Meyer's take on the final keyword:

http://www.artima.com/intv/meaning3.html

The 4-part series is very good reading. 🙂

 

[BFG10K]

Make the function private and it should work.