| (1) || (since C++11) |
shared_future( const shared_future& other );
| (2) || (since C++11) |
shared_future( std::future<T>&& other );
| (3) || (since C++11) |
shared_future( shared_future&& other );
| (4) || (since C++11) |
Constructs a new
1) Default constructor. Constructs an empty shared future, that doesn't refer to a shared state, that is
valid() == false.
2) Constructs a shared future that refers to the same shared state, as
other, if there's any.
3-4) Transfers the shared state held by
*this. After the construction,
other->valid() == false, also
valid() returns the same value as
other.valid() would have returned before the construction.
| other || - || another future object to initialize with
| 2) (none) ||(until C++17)
| 2) ||(since C++17)