20 General utilities library [utilities]

20.5 Tuples [tuple]

20.5.2 Class template tuple [tuple.tuple]

20.5.2.10 Tuple specialized algorithms [tuple.special]

template <class... Types> void swap(tuple<Types...>& x, tuple<Types...>& y) noexcept(see below);

1

Remarks: This function shall not participate in overload resolution unless is_swappable_v<Ti> is true for all i, where 0 ≤ i < sizeof...(Types). The expression inside noexcept is equivalent to:

noexcept(x.swap(y))
2

Effects: As if by x.swap(y).