Function unwrap

include/cute/algorithm/tuple_algorithms.hpp:514–529

// Unwrap rank-1 tuples until we're left with a rank>1 tuple or a non-tuple
template <class T>
CUTE_HOST_DEVICE constexpr
auto
unwrap(T const& t)
{
  if constexpr (is_tuple<T>::value) {
    if constexpr (tuple_size<T>::value == 1) {
      return unwrap(get<0>(t));
    } else {
      return t;
    }
  } else {
    return t;
  }

  CUTE_GCC_UNREACHABLE;
}

//
// Flatten and Unflatten