20 General utilities library [utilities]

20.7 Variants [variant]

20.7.9 Specialized algorithms [variant.specalg]

template <class... Types> void swap(variant<Types...>& v, variant<Types...>& w) noexcept(see below);

1

Effects: Equivalent to v.swap(w).

2

Remarks: This function shall not participate in overload resolution unless is_move_constructible_v<Ti> && is_swappable_v<Ti> is true for all i. The expression inside noexcept is equivalent to noexcept(v.swap(w)).