21 Containers library [containers]

21.3 Sequence containers [sequences]

21.3.7 Class template array [array]

21.3.7.4 Specialized algorithms [array.special]

template<class T, size_t N> constexpr 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.