[c++] Heterogeni kontejner

class ValueBase
{
public:
    virtual std::string getValueAsString() = 0 const;
    virtual int getValueAsInt() = 0 const;
    ...
    ...
};

template<class Type>
class Value : public ValueBase
{
public:
    Value(const Type& value)
     : m_value(value)
    {}

    const Type& getValue() const
    {
        return m_value;
    }
    void setValue(const Type& value)
    {
        m_value = value;
    }

    virtual std::string getValueAsString() const
    {
        return convert<Type, std::string>(m_value); -- convert je podobna funkcija kot lexical_cast (uporablja se stringstream)
    }

    virtual int getValueAsInt() const
    {
        return convert<Type, int>(m_value);
    }

private:
    Type m_value;
};

................................................

std::list<ValueBase*> values;
Value<int> stevilo(2);
Value<std::string> niz(std::string("bla bla"));
values.push_back(&stevilo);
values.push_back(&niz);