(!std::is_same<Iter, OtherIter>::value &&
!std::is_convertible<OtherIter, Iter>::value &&
std::is_constructible<Iter, const OtherIter&>::value), int>::type = 0>
(!std::is_same<Iter, OtherIter>::value &&
!std::is_convertible<OtherIter, Iter>::value &&
std::is_constructible<Iter, const OtherIter&>::value), int>::type = 0>