[C++-sig] ‘Base’ is an inaccessible base of ‘Derived’ ??

[Anders Wallin]

Thanks, inserting a few "public" keywords here and there makes this compile:
class Base {
    public:
        virtual int f(int x) = 0;
};

class Derived : public Base {
    public:
        int f(int x) {return 2*x;}
};

class BaseWrap : public Base, public boost::python::wrapper<Base>
{
    public:
        int f(int x)
        {
            return this->get_override("f")(x);
        }
};


not sure if this is worth mentioning in the documentation, or is it
very obvious to everyone except newbies like myself... :)

> The minor but very significant difference between the tutorial code and
> yours is that the tutorial uses 'struct', while you are using 'class'. The
> effect is that in your case, all base classes are private, making them, as
> the compiler says, "inaccessible".
>
> Regards,
>        Stefan