Conditionally include members in template class

I would like to exclude or include some members in a template class, based on the value of its template parameter. Here's an example:

enum t_chooser {A, B, all};

template <t_chooser choice>
class C {

    // include if choice==A
    int v1;
    // include if choice==B
    long v2;
    // include if choice==B    
    int v3;
    // include for every value of choice
    bool v4;
};

If the template parameter choice is equal to all, all members should be included. Is there a way to achieve this in C++11, maybe even using std::enable_if?

I have seen a solution for member functions here: std::enable_if to conditionally compile a member function