Retrieve data from heterogeneous std::list

Question

In the below code I am simply trying to experiment with a Heterogeneous std::list where I have stored three Derived class object in a list of type Base*. When retrieving data fr

Answer 1

#include 
#include 
#include 
#include 

class Base;
typedef std::list any_list;

class Base{
public:
    virtual ~Base(){}
    virtual std::string getData()=0;
};

class Derived1 : public Base
{
public:
    std::string s;
    Derived1():s("D1"){}
    std::string getData()
    {
        return s;
    }
};
class Derived2 : public Base
{
public:
    std::string s;
    Derived2():s("D2"){}
    std::string getData()
    {
        return s;
    }
};
class Derived3 : public Base
{
public:
    std::string s;
    Derived3():s("D3"){}
    std::string getData()
    {
        return s;
    }
};

int main(int argc, char **argv) {
    any_list l;
    l.push_back(new Derived1);
    l.push_back(new Derived2);
    l.push_back(new Derived3);

    for(any_list::iterator itr=l.begin();itr!=l.end();++itr)
        std::cout<<((Base*)*itr)->getData()<

Thanks for the help. Confusion is clear and the problem is solved. By d way what is -

typedef std::list< std::unique_ptr > any_list;

I didn't find anything called unique_ptr in std:: namespace. :(