Associate a std::experimental::packaged_task instance with
a new asynchronous result for the same task.
void reset();
*this
has an associated asynchronous task.
Allocate a new asynchronous result for the task associated with
*this.
If the asynchronous result associated with *this prior to the call is not ready,
that asynchronous result is ready with a stored
exception of type std::future_error
and an error code of std::future_errc::broken_promise.
*this
has a new asynchronous result with no associated futures, and which
is not ready.
An exception of type std::bad_alloc
if memory could not be allocated for the new asynchronous result.
#include <experimental/future>