Inherit from const class

Question

I would like to inherit from a class with the const specifier like this:

class Property
{
    int get() const;
    void set(int a);
};

class Co         


        

Answer 1

You can use a template class and a specialization for a constant type:

    template class base_property {
    protected:
      T value;
    };
    template class property : public base_property {
    public:
      const T& get()const { return value; }
      void set(const T& v){ value = v; }
    };

    template class property : public base_property {
    public:
      const T& get()const { return value; }
    };

    class ConstChild : public property{ };