Question

Is it possible to specialize a inner class declared within a template class? More or less like the following example (which doesn’t work):

template<unsigned N>
class Outer {
    struct Inner {
        typedef int Value;
    };
    typedef typename Inner::Value Value;
};

template<>
struct Outer<0>::Inner {
    typedef float Value;
};

Answer 1

Best solution I found is to move Inner outside.

template<unsigned N>
struct Inner {
    typedef int Value;
};

template<>
struct Inner<0> {
    typedef float Value;
};

template<unsigned N>
class Outer {
    typedef typename Inner<N>::Value Value;
};