#[must_use = "futures do nothing unless polled"]pub enum EitherFuture<A, B> {
First(A),
Second(B),
}
Implements Future
and dispatches all method calls to either First
or Second
.
impl<A: Copy, B: Copy> Copy for EitherFuture<A, B>
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impl<A: Debug, B: Debug> Debug for EitherFuture<A, B>
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impl<AFuture, BFuture, AInner, BInner> Future for EitherFuture<AFuture, BFuture> where
AFuture: TryFuture<Ok = AInner>,
BFuture: TryFuture<Ok = BInner>,
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impl<'pin, A, B> Unpin for EitherFuture<A, B> where
__EitherFuture<'pin, A, B>: Unpin,
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impl<A, B> RefUnwindSafe for EitherFuture<A, B> where
A: RefUnwindSafe,
B: RefUnwindSafe,
impl<A, B> Send for EitherFuture<A, B> where
A: Send,
B: Send,
impl<A, B> Sync for EitherFuture<A, B> where
A: Sync,
B: Sync,
impl<A, B> UnwindSafe for EitherFuture<A, B> where
A: UnwindSafe,
B: UnwindSafe,
impl<T> Any for T where
T: 'static + ?Sized,
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impl<T> Borrow<T> for T where
T: ?Sized,
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impl<T> BorrowMut<T> for T where
T: ?Sized,
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impl<T> From<T> for T
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impl<T> FutureExt for T where
T: Future + ?Sized,
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[+] Show hidden undocumented itemspub fn map<U, F>(self, f: F) -> Map<Self, F> where
F: FnOnce(Self::Output) -> U,
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Map this future’s output to a different type, returning a new future of
the resulting type. Read more
pub fn map_into<U>(self) -> MapInto<Self, U> where
Self::Output: Into<U>,
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Map this future’s output to a different type, returning a new future of
the resulting type. Read more
pub fn then<Fut, F>(self, f: F) -> Then<Self, Fut, F> where
F: FnOnce(Self::Output) -> Fut,
Fut: Future,
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Chain on a computation for when a future finished, passing the result of
the future to the provided closure f
. Read more
pub fn left_future<B>(self) -> Either<Self, B> where
B: Future<Output = Self::Output>,
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Wrap this future in an Either
future, making it the left-hand variant
of that Either
. Read more
pub fn right_future<A>(self) -> Either<A, Self> where
A: Future<Output = Self::Output>,
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Wrap this future in an Either
future, making it the right-hand variant
of that Either
. Read more
pub fn into_stream(self) -> IntoStream<Self>
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Convert this future into a single element stream. Read more
pub fn flatten(self) -> Flatten<Self> where
Self::Output: Future,
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Flatten the execution of this future when the output of this
future is itself another future. Read more
pub fn flatten_stream(self) -> FlattenStream<Self> where
Self::Output: Stream,
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Flatten the execution of this future when the successful result of this
future is a stream. Read more
pub fn fuse(self) -> Fuse<Self>
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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
pub fn inspect<F>(self, f: F) -> Inspect<Self, F> where
F: FnOnce(&Self::Output),
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Do something with the output of a future before passing it on. Read more
pub fn catch_unwind(self) -> CatchUnwind<Self> where
Self: UnwindSafe,
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Catches unwinding panics while polling the future. Read more
pub fn shared(self) -> Shared<Self> where
Self::Output: Clone,
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Create a cloneable handle to this future where all handles will resolve
to the same result. Read more
pub fn remote_handle(self) -> (Remote<Self>, RemoteHandle<Self::Output>)
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Turn this future into a future that yields ()
on completion and sends
its output to another future on a separate task. Read more
pub fn boxed<'a>(
self
) -> Pin<Box<dyn Future<Output = Self::Output> + 'a + Send, Global>> where
Self: Send + 'a,
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Wrap the future in a Box, pinning it. Read more
pub fn boxed_local<'a>(
self
) -> Pin<Box<dyn Future<Output = Self::Output> + 'a, Global>> where
Self: 'a,
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Wrap the future in a Box, pinning it. Read more
pub fn unit_error(self) -> UnitError<Self>
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pub fn never_error(self) -> NeverError<Self>
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pub fn poll_unpin(&mut self, cx: &mut Context<'_>) -> Poll<Self::Output> where
Self: Unpin,
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A convenience for calling Future::poll
on Unpin
future types.
pub fn now_or_never(self) -> Option<Self::Output>
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Evaluates and consumes the future, returning the resulting output if
the future is ready after the first call to Future::poll
. Read more
impl<T, U> Into<U> for T where
U: From<T>,
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impl<F> IntoFuture for F where
F: Future,
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impl<T> Same<T> for T
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impl<T> ToOwned for T where
T: Clone,
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impl<T, U> TryFrom<U> for T where
U: Into<T>,
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impl<F, T, E> TryFuture for F where
F: Future<Output = Result<T, E>> + ?Sized,
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impl<Fut> TryFutureExt for Fut where
Fut: TryFuture + ?Sized,
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[+] Show hidden undocumented itemspub fn flatten_sink<Item>(self) -> FlattenSink<Self, Self::Ok> where
Self::Ok: Sink<Item>,
<Self::Ok as Sink<Item>>::Error == Self::Error,
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Flattens the execution of this future when the successful result of this
future is a Sink
. Read more
pub fn map_ok<T, F>(self, f: F) -> MapOk<Self, F> where
F: FnOnce(Self::Ok) -> T,
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Maps this future’s success value to a different value. Read more
pub fn map_ok_or_else<T, E, F>(self, e: E, f: F) -> MapOkOrElse<Self, F, E> where
F: FnOnce(Self::Ok) -> T,
E: FnOnce(Self::Error) -> T,
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Maps this future’s success value to a different value, and permits for error handling resulting in the same type. Read more
pub fn map_err<E, F>(self, f: F) -> MapErr<Self, F> where
F: FnOnce(Self::Error) -> E,
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Maps this future’s error value to a different value. Read more
pub fn err_into<E>(self) -> ErrInto<Self, E> where
Self::Error: Into<E>,
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pub fn ok_into<U>(self) -> OkInto<Self, U> where
Self::Ok: Into<U>,
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pub fn and_then<Fut, F>(self, f: F) -> AndThen<Self, Fut, F> where
F: FnOnce(Self::Ok) -> Fut,
Fut: TryFuture<Error = Self::Error>,
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Executes another future after this one resolves successfully. The
success value is passed to a closure to create this subsequent future. Read more
pub fn or_else<Fut, F>(self, f: F) -> OrElse<Self, Fut, F> where
F: FnOnce(Self::Error) -> Fut,
Fut: TryFuture<Ok = Self::Ok>,
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Executes another future if this one resolves to an error. The
error value is passed to a closure to create this subsequent future. Read more
pub fn inspect_ok<F>(self, f: F) -> InspectOk<Self, F> where
F: FnOnce(&Self::Ok),
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Do something with the success value of a future before passing it on. Read more
pub fn inspect_err<F>(self, f: F) -> InspectErr<Self, F> where
F: FnOnce(&Self::Error),
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Do something with the error value of a future before passing it on. Read more
pub fn try_flatten(self) -> TryFlatten<Self, Self::Ok> where
Self::Ok: TryFuture,
<Self::Ok as TryFuture>::Error == Self::Error,
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Flatten the execution of this future when the successful result of this
future is another future. Read more
pub fn try_flatten_stream(self) -> TryFlattenStream<Self> where
Self::Ok: TryStream,
<Self::Ok as TryStream>::Error == Self::Error,
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Flatten the execution of this future when the successful result of this
future is a stream. Read more
pub fn unwrap_or_else<F>(self, f: F) -> UnwrapOrElse<Self, F> where
F: FnOnce(Self::Error) -> Self::Ok,
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Unwraps this future’s ouput, producing a future with this future’s
Ok
type as its
Output
type. Read more
pub fn compat(self) -> Compat<Self> where
Self: Unpin,
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Wraps a TryFuture
into a future compatable with libraries using
futures 0.1 future definitons. Requires the compat
feature to enable. Read more
pub fn into_future(self) -> IntoFuture<Self>
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pub fn try_poll_unpin(
&mut self,
cx: &mut Context<'_>
) -> Poll<Result<Self::Ok, Self::Error>> where
Self: Unpin,
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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impl<V, T> VZip<V> for T where
V: MultiLane<T>,
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