[−][src]Enum futures_util::future::MaybeDone
A future that may have completed.
This is created by the maybe_done() function.
Variants
Future(Fut)A not-yet-completed future
Done(Fut::Output)The output of the completed future
GoneThe empty variant after the result of a MaybeDone has been
taken using the take_output method.
Methods
impl<Fut: Future> MaybeDone<Fut>[src]
impl<Fut: Future> MaybeDone<Fut>pub fn output_mut<'a>(self: Pin<&'a mut Self>) -> Option<&'a mut Fut::Output>[src]
pub fn output_mut<'a>(self: Pin<&'a mut Self>) -> Option<&'a mut Fut::Output>Returns an Option containing a mutable reference to the output of the future.
The output of this method will be Some if and only if the inner
future has been completed and take_output
has not yet been called.
pub fn take_output(self: Pin<&mut Self>) -> Option<Fut::Output>[src]
pub fn take_output(self: Pin<&mut Self>) -> Option<Fut::Output>Attempt to take the output of a MaybeDone without driving it
towards completion.
Trait Implementations
impl<Fut: Debug + Future> Debug for MaybeDone<Fut> where
Fut::Output: Debug, [src]
impl<Fut: Debug + Future> Debug for MaybeDone<Fut> where
Fut::Output: Debug, impl<Fut: Future + Unpin> Unpin for MaybeDone<Fut>[src]
impl<Fut: Future + Unpin> Unpin for MaybeDone<Fut>impl<Fut: Future> Future for MaybeDone<Fut>[src]
impl<Fut: Future> Future for MaybeDone<Fut>type Output = ()
🔬 This is a nightly-only experimental API. (futures_api)
futures in libcore are unstable
The result of the Future.
fn poll(self: Pin<&mut Self>, lw: &LocalWaker) -> Poll<Self::Output>[src]
fn poll(self: Pin<&mut Self>, lw: &LocalWaker) -> Poll<Self::Output>impl<Fut: Future> FusedFuture for MaybeDone<Fut>[src]
impl<Fut: Future> FusedFuture for MaybeDone<Fut>fn is_terminated(&self) -> bool[src]
fn is_terminated(&self) -> boolAuto Trait Implementations
impl<Fut> Send for MaybeDone<Fut> where
Fut: Send,
<Fut as Future>::Output: Send,
impl<Fut> Send for MaybeDone<Fut> where
Fut: Send,
<Fut as Future>::Output: Send, impl<Fut> Sync for MaybeDone<Fut> where
Fut: Sync,
<Fut as Future>::Output: Sync,
impl<Fut> Sync for MaybeDone<Fut> where
Fut: Sync,
<Fut as Future>::Output: Sync, Blanket Implementations
impl<T> FutureExt for T where
T: Future + ?Sized, [src]
impl<T> FutureExt for T where
T: Future + ?Sized, fn map<U, F>(self, f: F) -> Map<Self, F> where
F: FnOnce(Self::Output) -> U,
Self: Sized, [src]
fn map<U, F>(self, f: F) -> Map<Self, F> where
F: FnOnce(Self::Output) -> U,
Self: Sized, Map this future's output to a different type, returning a new future of the resulting type. Read more
fn then<Fut, F>(self, f: F) -> Then<Self, Fut, F> where
F: FnOnce(Self::Output) -> Fut,
Fut: Future,
Self: Sized, [src]
fn then<Fut, F>(self, f: F) -> Then<Self, Fut, F> where
F: FnOnce(Self::Output) -> Fut,
Fut: Future,
Self: Sized, Chain on a computation for when a future finished, passing the result of the future to the provided closure f. Read more
fn join<Fut2>(self, other: Fut2) -> Join<Self, Fut2> where
Fut2: Future,
Self: Sized, [src]
fn join<Fut2>(self, other: Fut2) -> Join<Self, Fut2> where
Fut2: Future,
Self: Sized, Joins the result of two futures, waiting for them both to complete. Read more
fn join3<Fut2, Fut3>(
self,
future2: Fut2,
future3: Fut3
) -> Join3<Self, Fut2, Fut3> where
Fut2: Future,
Fut3: Future,
Self: Sized, [src]
fn join3<Fut2, Fut3>(
self,
future2: Fut2,
future3: Fut3
) -> Join3<Self, Fut2, Fut3> where
Fut2: Future,
Fut3: Future,
Self: Sized, Same as join, but with more futures. Read more
fn join4<Fut2, Fut3, Fut4>(
self,
future2: Fut2,
future3: Fut3,
future4: Fut4
) -> Join4<Self, Fut2, Fut3, Fut4> where
Fut2: Future,
Fut3: Future,
Fut3: Future,
Fut4: Future,
Self: Sized, [src]
fn join4<Fut2, Fut3, Fut4>(
self,
future2: Fut2,
future3: Fut3,
future4: Fut4
) -> Join4<Self, Fut2, Fut3, Fut4> where
Fut2: Future,
Fut3: Future,
Fut3: Future,
Fut4: Future,
Self: Sized, Same as join, but with more futures. Read more
fn join5<Fut2, Fut3, Fut4, Fut5>(
self,
future2: Fut2,
future3: Fut3,
future4: Fut4,
future5: Fut5
) -> Join5<Self, Fut2, Fut3, Fut4, Fut5> where
Fut2: Future,
Fut3: Future,
Fut3: Future,
Fut4: Future,
Fut5: Future,
Self: Sized, [src]
fn join5<Fut2, Fut3, Fut4, Fut5>(
self,
future2: Fut2,
future3: Fut3,
future4: Fut4,
future5: Fut5
) -> Join5<Self, Fut2, Fut3, Fut4, Fut5> where
Fut2: Future,
Fut3: Future,
Fut3: Future,
Fut4: Future,
Fut5: Future,
Self: Sized, Same as join, but with more futures. Read more
fn into_stream(self) -> IntoStream<Self> where
Self: Sized, [src]
fn into_stream(self) -> IntoStream<Self> where
Self: Sized, Convert this future into a single element stream. Read more
fn flatten(self) -> Flatten<Self> where
Self::Output: Future,
Self: Sized, [src]
fn flatten(self) -> Flatten<Self> where
Self::Output: Future,
Self: Sized, Flatten the execution of this future when the successful result of this future is itself another future. Read more
fn flatten_stream(self) -> FlattenStream<Self> where
Self::Output: Stream,
Self: Sized, [src]
fn flatten_stream(self) -> FlattenStream<Self> where
Self::Output: Stream,
Self: Sized, Flatten the execution of this future when the successful result of this future is a stream. Read more
fn fuse(self) -> Fuse<Self> where
Self: Sized, [src]
fn fuse(self) -> Fuse<Self> where
Self: Sized, Fuse a future such that poll will never again be called once it has completed. This method can be used to turn any Future into a FusedFuture. Read more
fn inspect<F>(self, f: F) -> Inspect<Self, F> where
F: FnOnce(&Self::Output),
Self: Sized, [src]
fn inspect<F>(self, f: F) -> Inspect<Self, F> where
F: FnOnce(&Self::Output),
Self: Sized, Do something with the output of a future before passing it on. Read more
fn catch_unwind(self) -> CatchUnwind<Self> where
Self: Sized + UnwindSafe, [src]
fn catch_unwind(self) -> CatchUnwind<Self> where
Self: Sized + UnwindSafe, Catches unwinding panics while polling the future. Read more
Create a cloneable handle to this future where all handles will resolve to the same result. Read more
fn remote_handle(self) -> (Remote<Self>, RemoteHandle<Self::Output>) where
Self: Sized, [src]
fn remote_handle(self) -> (Remote<Self>, RemoteHandle<Self::Output>) where
Self: Sized, Turn this future into a future that yields () on completion and sends its output to another future on a separate task. Read more
fn boxed(self) -> Pin<Box<Self>> where
Self: Sized, [src]
fn boxed(self) -> Pin<Box<Self>> where
Self: Sized, Wrap the future in a Box, pinning it.
fn unit_error(self) -> UnitError<Self> where
Self: Sized, [src]
fn unit_error(self) -> UnitError<Self> where
Self: Sized, Turns a Future into a TryFuture with Error = ().
fn poll_unpin(&mut self, lw: &LocalWaker) -> Poll<Self::Output> where
Self: Unpin + Sized, [src]
fn poll_unpin(&mut self, lw: &LocalWaker) -> Poll<Self::Output> where
Self: Unpin + Sized, A convenience for calling Future::poll on Unpin future types.
impl<T> From for T[src]
impl<T> From for Timpl<T, U> Into for T where
U: From<T>, [src]
impl<T, U> Into for T where
U: From<T>, impl<T, U> TryFrom for T where
T: From<U>, [src]
impl<T, U> TryFrom for T where
T: From<U>, type Error = !
try_from)The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>[src]
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>impl<T> Borrow for T where
T: ?Sized, [src]
impl<T> Borrow for T where
T: ?Sized, impl<T> Any for T where
T: 'static + ?Sized, [src]
impl<T> Any for T where
T: 'static + ?Sized, fn get_type_id(&self) -> TypeId[src]
fn get_type_id(&self) -> TypeIdimpl<T, U> TryInto for T where
U: TryFrom<T>, [src]
impl<T, U> TryInto for T where
U: TryFrom<T>, type Error = <U as TryFrom<T>>::Error
try_from)The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>[src]
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>impl<T> BorrowMut for T where
T: ?Sized, [src]
impl<T> BorrowMut for T where
T: ?Sized, ⓘImportant traits for &'_ mut Ifn borrow_mut(&mut self) -> &mut T[src]
fn borrow_mut(&mut self) -> &mut T