std::future<T>::share
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waits for a value (possibly referenced by other futures) that is set asynchronously
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std::future
Member functions
future::share
Getting the result
State
std::shared_future <T> share() noexcept;
Transfers the shared state of *this, if any, to a std::shared_future object. Multiple std::shared_future objects may reference the same shared state, which is not possible with std::future .
After calling share on a std::future , valid() == false.
[edit] Parameters
(none)
[edit] Return value
A std::shared_future object containing the shared state previously held by *this, if any, constructed as if by std::shared_future <T>(std::move(*this)).
[edit] Example
This section is incomplete
Reason: no example
Reason: no example
[edit] Defect reports
The following behavior-changing defect reports were applied retroactively to previously published C++ standards.
| DR | Applied to | Behavior as published | Correct behavior |
|---|---|---|---|
| LWG 2556 | C++11 | share() requires valid() to be true
|
requirement removed and made noexcept
|
[edit] See also
(C++11)
(class template) [edit]