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std::future::future

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future();
(1) (since C++11)
future( future&& other );
(2) (since C++11)
future( const future& other ) = delete;
(3) (since C++11)

Constructs a std::future object.

1) Default constructor. Constructs a std::future with no shared state. After construction, valid() == false.
2) Move constructor. Constructs a std::future with the shared state of other using move semantics. After construction, other.valid() == false.
3) std::future is not CopyConstructible.

[edit] Parameters

other - another std::future to acquire shared state from

[edit] Exceptions

1-2)
noexcept specification:  
noexcept