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std::swap(std::variant)

Defined in header <variant> 
template <class... Types>
void swap(variant<Types...>& lhs, variant<Types...>& rhs) noexcept(/* see below */);
 (since C++17)

Overloads the std::swap algorithm for std::variant. Effectively calls lhs.swap(rhs).

This overload only participates in overload resolution if is_move_constructible_v<T_i> and is_swappable_v<T_i> are both true for all T_i in Types...

Parameters

lhs, rhs - variant objects whose values to swap

Return value

(none).

Exceptions

noexcept specification:
noexcept(noexcept(lhs.swap(rhs)))

Example

See also

swaps with another variant
(public member function)

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