C++ can (virtual) private base classes be removed by the compiler?

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Given the following example:

class A
{
    protected:
        static void useful_function_without_side_effects() {...}
}

class B : private A
{
    // B has no friends :(

    public:
        void travel_back_in_time() { super_useful_function(); }
}

Question 1: Would it be allowed for the compiler to optimize the base class A out, since this base class can't really affect B or it's run-time behaviour in any way?

Question 2: Would this change if the inheritance would be declared private virtual like this?

class B : private virtual A

asked 32 secs ago

Jack Sabbath

35

C++ can (virtual) private base classes be removed by the compiler?