std::packaged_task::swap (3) Linux Manual Page
std::packaged_task<R(Args…)>::swap – std::packaged_task<R(Args…)>::swap
Synopsis
void swap(packaged_task &other) noexcept;
(since C++ 11)Exchanges the shared states and stored tasks of *this and other.
Parameters
other – packaged task whose state to swap with
Return value
(none)
See also
std::swap(std::packaged_task) specializes the std::swap algorithm
(C++11)