Multiple inheritance without virtual functions in c++

Question

I came across the diamond problem and found different solutions for different cases with a single diamond. However I couldn\'t find a solution for \'chained\' diamonds.

Answer 1

s->kid1::val does not mean "val from the kid1 subobject". It's just a name qualified by the type (not the subobject) that contains it.

I don't know why country1::kid1 is even accepted at all, but apparently it's a typedef for ::kid1. Two data members in world both have the qualified name ::kid1::val.

What you want is:

world* w = new world;
country1* const c1 = world;
c1->kid1::val = 1;