[Boost-users] [bind,function,mem_fn] Connection to a base class

From: Johannes Brunen (jbrunen_at_[hidden])
Date: 2006-12-01 07:10:22

Hi, 
I have the following problem and don't know how to design it with the
boost tools at hand: 

I have a base class X with two functions f and g 

class X { 
    virtual bool f() const; 
    virtual bool g(int) const; 
}; 

and another class Y with functions f1, f2 and F 

class Y { 
    void f1(); 
    void f2(); 
    void F(???); 
}; 

Now, f1 and f2 should call F, but f1 should determine that F calls X::f
polymorphically and f2 should determine that F calls X::g
polymorphically. 

Y::f1() { 
    // call F so that F works on X::f 
    F(??? X::f); 
} 

Y::f2() { 
    // call F so that F works on Y::g but with g's int parameter known
and determined in Y::f2 
    int v = 5; 
    F(??? X::g, v); 
} 

Y::F(???) { 
    smart_ptr<Y> sp1(new Y); 
    smart_ptr<Y> sp2(new Y); 

    // Either call Y::f on sp1 and sp2, or call Y::g(5) on sp1 and sp2 
} 

Is this possible? I have looked into the documentation of boost::bind,
boost::mem_fn and boost::function but didn't find a way to do that. 
Could someone give me some hint? 

With best regards 

Johannes Brunen