std::experimental::shared_future<T>::operator=
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std::experimental::shared_future <T>& operator=( const std::experimental::shared_future <T>& other );
 (1) 
 
std::experimental::shared_future <T>& operator=( std::experimental::shared_future <T>&& other ) noexcept;
 (2) 
 
Assigns the contents of another std::experimental::shared_future object.
1) Releases any shared state and assigns the contents of other to *this. After the assignment, this->valid() == other.valid().
2) Releases any shared state and move-assigns the contents of other to *this. After the assignment, other.valid() == false and this->valid() will yield the same value as other.valid() before the assignment.
[edit] Parameters
 other
 -
 a 
std::experimental::shared_future object to assign from
[edit] Return value
*this