Since static const data inside a class is really just namespace sugar for constants I would think that

struct A {
    float a;

    struct B {
       static const int b = a;
    };

 };

would be equivalent to

struct A {
    float a;
};

struct A::B {
    static const int b = a;
};

or something similar. Is something like this possible in C++? It would be useful for me to be able to tag class definitions that I'm pulling in from third party libraries with information like this.