N>enum Eabcd { a, b, c, d };

N>template< Eabcd arg >
N>struct some_s {
N>   enum { value = arg; }
N>};

N>typedef std::vector< some_s<???> > v_some_s;

N>v_some_s v;

N>v.push_back( some_s<a>() );
N>v.push_back( some_s<b>() );
N>v.push_back( some_s<c>() );
N>v.push_back( some_s<d>() );
N>