Unknown use of protected member functions.

[tomas]

Hi.
I'm working with a C++ framework that has something like this:

class A {
protected:
virtual void init();
virtual void run();

// rest of the class
....
}

class B : public A {
public:
A::init;
A::run;

// rest of the class
....
}

I have never seem the use of A::init; and A::run; in that way before.
What are they supposed to be?
How do they afect to class B?
What do you think is the purpose of them?

Tom

 

[Ian Collins]

Hi.
I'm working with a C++ framework that has something like this:

class A {
protected:
virtual void init();
virtual void run();

// rest of the class
....
}

class B : public A {
public:
A::init;
A::run;

// rest of the class
....
}

I have never seem the use of A::init; and A::run; in that way before.
What are they supposed to be?
How do they afect to class B?
What do you think is the purpose of them?

To make them public.

 

[sk_usenet]

I'm working with a C++ framework that has something like this:

class A {
protected:
virtual void init();
virtual void run();

// rest of the class
...
}

class B : public A {
public:
A::init;
A::run;

// rest of the class
...
}

I have never seem the use of A::init; and A::run; in that way before.
What are they supposed to be?
How do they afect to class B?
What do you think is the purpose of them?

It means that init and run are now in the public interface of B. Without
them they would be inaccessible to the outside world (unrelated classes).

int main()
{
A a;
a.init(); // Inaccessible
B b;
b.init(); // Kosher
}

So B has basically modified what it exposes to the outside world.