std::swap(std::variant)

 

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std::variant

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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)))

See also

swap	swaps with another variant (public member function)