constexpr CCTK_ATTRIBUTE_ALWAYS_INLINE enable_if_t<(N == 4), array<T, N> >
array_from_initializer_list(initializer_list<T> l) {
  assert(l.size() >= N);
  const T *restrict const p = l.begin();
  return {p[0], p[1], p[2], p[3]};
}
template <typename T, size_t N>

constexpr CCTK_ATTRIBUTE_ALWAYS_INLINE enable_if_t<(N == 10), array<T, N> >
array_from_initializer_list(initializer_list<T> l) {
  assert(l.size() >= N);
  const T *restrict const p = l.begin();
  return {p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], p[8], p[9]};
}
template <typename T, size_t N>

constexpr CCTK_ATTRIBUTE_ALWAYS_INLINE enable_if_t<(N == 4), array<T, N> >
array_from_vector(vector<T> &&v) {
  assert(v.size() >= N);
  typename vector<T>::iterator const p = v.begin();
  return {move(p[0]), move(p[1]), move(p[2]), move(p[3])};
}
template <typename T, size_t N>

}
template <typename T, size_t N>
constexpr CCTK_ATTRIBUTE_ALWAYS_INLINE enable_if_t<(N == 10), array<T, N> >
array_from_vector(vector<T> &&v) {
  assert(v.size() >= N);
  typename vector<T>::iterator const p = v.begin();
  return {move(p[0]), move(p[1]), move(p[2]), move(p[3]), move(p[4]),
          move(p[5]), move(p[6]), move(p[7]), move(p[8]), move(p[9])};