std::packaged_task::operator=

From cppreference.com
packaged_task& operator=( const packaged_task& ) = delete;
(1) (since C++11)
packaged_task& operator=( packaged_task&& rhs )
(2) (since C++11)
1) Copy assignment operator is deleted, std::packaged_task is move-only. Note: C++11 does not specify const here, this is the defect 2067.
2) Releases the shared state, if any, destroys the previously-held task, and moves the shared state and the task owned by rhs into *this. rhs is left without a shared state and with a moved-from task.

[edit] Parameters

rhs - the std::packaged_task to move from

[edit] Exceptions

1) (none)
2)
noexcept specification:  
noexcept
  

[edit] Example