Run-time type id and Inheritance

From: Michael H Lees (mhl_at_cs.nott.ac.uk++)
Date: 02/08/05 

Date: Tue, 08 Feb 2005 12:41:12 +0000

Is there any possible way to determine if a class A inherits from class
B at run-time.

So if I have an Abstract Base Class called Grandparent, then a class
which inherits from GrandParent called Parent and finally a class which
inherits from Parent called Child. Something like...

class GrandParent{
public:
    virtual bool IsYoung(){return false;}
    //...
};

class Parent : public GrandParent{
public:
   // ...
};

class Child : public Parent{
public:
    bool IsYoung(){return true;}
    //...
};

GrandParent *gp_ptr;
Child c;

gp_ptr=&c;

is there anyway to determine that gp_ptr is now pointing to something
which inherits from Parent? Do I just attempt to cast the gp_ptr to a
Parent?

Thanks

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