std::future<T>::share

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

Parameters

(none)

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) )

Example

This section is incomplete Reason: no example

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

See also

shared_future (C++11)

waits for a value (possibly referenced by other futures) that is set asynchronously (class template)