std::experimental::make_exceptional_future (3) Linux Manual Page
std::experimental::make_exceptional_future – std::experimental::make_exceptional_future
Synopsis
Defined in header<experimental / future>
template <class T>
(1)(concurrency TS)
future<T> make_exceptional_future(std::exception_ptr ex);
template <class T, class E>
(2)(concurrency TS)
future<T> make_exceptional_future(E ex);
1) Creates a shared state of type T that is immediately ready and stores the exception pointer ex, then return a future associated with that shared state, as if by promise<T> p;
p.set_exception(ex);
return p.get_future();. The behavior is undefined if ex is null.
2) Creates a shared state of type T that is immediately ready and stores an exception pointer created from ex, then return a future associated with that shared state, as if by promise<T> p;
p.set_exception(std::make_exception_ptr(ex));
return p.get_future();
Return value
A future object associated with the shared state that was created.
See also
make_ready_future produces a future that is ready immediately and holds the given value
(concurrency TS)