template <class T, size_t N>
void swap(array<T, N>& x, array<T, N>& y) noexcept(noexcept(x.swap(y)));
Remarks: This function shall not participate in overload resolution unless N == 0 or is_swappable_v<T> is true.
Effects: As if by x.swap(y).
Complexity: Linear in N.