[−][src]Struct futures::stream::TryFold
Future for the try_fold
method.
Trait Implementations
impl<St, Fut, T, F> Unpin for TryFold<St, Fut, T, F> where
Fut: Unpin,
St: Unpin,
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Fut: Unpin,
St: Unpin,
impl<St, Fut, T, F> Future for TryFold<St, Fut, T, F> where
F: FnMut(T, <St as TryStream>::Ok) -> Fut,
Fut: TryFuture<Ok = T, Error = <St as TryStream>::Error>,
St: TryStream,
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F: FnMut(T, <St as TryStream>::Ok) -> Fut,
Fut: TryFuture<Ok = T, Error = <St as TryStream>::Error>,
St: TryStream,
type Output = Result<T, <St as TryStream>::Error>
🔬 This is a nightly-only experimental API. (futures_api
)
futures in libcore are unstable
The type of value produced on completion.
fn poll(
self: Pin<&mut TryFold<St, Fut, T, F>>,
cx: &mut Context
) -> Poll<<TryFold<St, Fut, T, F> as Future>::Output>
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self: Pin<&mut TryFold<St, Fut, T, F>>,
cx: &mut Context
) -> Poll<<TryFold<St, Fut, T, F> as Future>::Output>
impl<St, Fut, T, F> FusedFuture for TryFold<St, Fut, T, F>
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fn is_terminated(&self) -> bool
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impl<St, Fut, T, F> Debug for TryFold<St, Fut, T, F> where
F: Debug,
Fut: Debug,
St: Debug,
T: Debug,
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F: Debug,
Fut: Debug,
St: Debug,
T: Debug,
Auto Trait Implementations
impl<St, Fut, T, F> Send for TryFold<St, Fut, T, F> where
F: Send,
Fut: Send,
St: Send,
T: Send,
F: Send,
Fut: Send,
St: Send,
T: Send,
impl<St, Fut, T, F> Sync for TryFold<St, Fut, T, F> where
F: Sync,
Fut: Sync,
St: Sync,
T: Sync,
F: Sync,
Fut: Sync,
St: Sync,
T: Sync,
Blanket Implementations
impl<T> From for T
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impl<T, U> Into for T where
U: From<T>,
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U: From<T>,
impl<T, U> TryFrom for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T> Borrow for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut for T where
T: ?Sized,
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T: ?Sized,
ⓘImportant traits for &'_ mut Ffn borrow_mut(&mut self) -> &mut T
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impl<T, U> TryInto for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> FutureExt for T where
T: Future + ?Sized,
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T: Future + ?Sized,
ⓘImportant traits for Map<Fut, F>default fn map<U, F>(self, f: F) -> Map<Self, F> where
F: FnOnce(Self::Output) -> U,
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F: FnOnce(Self::Output) -> U,
Map this future's output to a different type, returning a new future of the resulting type. Read more
ⓘImportant traits for Then<Fut1, Fut2, F>default fn then<Fut, F>(self, f: F) -> Then<Self, Fut, F> where
F: FnOnce(Self::Output) -> Fut,
Fut: Future,
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F: FnOnce(Self::Output) -> Fut,
Fut: Future,
Chain on a computation for when a future finished, passing the result of the future to the provided closure f
. Read more
default fn into_stream(self) -> IntoStream<Self>
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Convert this future into a single element stream. Read more
ⓘImportant traits for Flatten<Fut>default fn flatten(self) -> Flatten<Self> where
Self::Output: Future,
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Self::Output: Future,
Flatten the execution of this future when the successful result of this future is itself another future. Read more
default fn flatten_stream(self) -> FlattenStream<Self> where
Self::Output: Stream,
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Self::Output: Stream,
Flatten the execution of this future when the successful result of this future is a stream. Read more
ⓘImportant traits for Fuse<Fut>default 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
ⓘImportant traits for Inspect<Fut, F>default fn inspect<F>(self, f: F) -> Inspect<Self, F> where
F: FnOnce(&Self::Output),
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F: FnOnce(&Self::Output),
Do something with the output of a future before passing it on. Read more
ⓘImportant traits for CatchUnwind<Fut>default fn catch_unwind(self) -> CatchUnwind<Self> where
Self: UnwindSafe,
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Self: UnwindSafe,
Catches unwinding panics while polling the future. Read more
ⓘImportant traits for Shared<Fut>default fn shared(self) -> Shared<Self> where
Self::Output: Clone,
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Self::Output: Clone,
Create a cloneable handle to this future where all handles will resolve to the same result. Read more
default 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
ⓘImportant traits for Pin<P>default fn boxed(self) -> Pin<Box<Self>>
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Wrap the future in a Box, pinning it.
ⓘImportant traits for UnitError<Fut>default fn unit_error(self) -> UnitError<Self>
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Turns a Future
into a TryFuture
with Error = ()
.
default fn poll_unpin(&mut self, cx: &mut Context) -> Poll<Self::Output> where
Self: Unpin,
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Self: Unpin,
A convenience for calling Future::poll
on Unpin
future types.
impl<F, T, E> TryFuture for F where
F: Future<Output = Result<T, E>>,
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F: Future<Output = Result<T, E>>,
type Ok = T
The type of successful values yielded by this future
type Error = E
The type of failures yielded by this future
fn try_poll(self: Pin<&mut F>, cx: &mut Context) -> Poll<<F as Future>::Output>
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impl<Fut> TryFutureExt for Fut where
Fut: TryFuture,
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Fut: TryFuture,
default fn flatten_sink<Item>(self) -> FlattenSink<Self, Self::Ok> where
Self::Ok: Sink<Item>,
<Self::Ok as Sink<Item>>::SinkError == Self::Error,
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Self::Ok: Sink<Item>,
<Self::Ok as Sink<Item>>::SinkError == Self::Error,
Flattens the execution of this future when the successful result of this future is a [Sink
]. Read more
ⓘImportant traits for MapOk<Fut, F>default fn map_ok<T, F>(self, f: F) -> MapOk<Self, F> where
F: FnOnce(Self::Ok) -> T,
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F: FnOnce(Self::Ok) -> T,
Maps this future's success value to a different value. Read more
ⓘImportant traits for MapErr<Fut, F>default fn map_err<E, F>(self, f: F) -> MapErr<Self, F> where
F: FnOnce(Self::Error) -> E,
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F: FnOnce(Self::Error) -> E,
Maps this future's error value to a different value. Read more
ⓘImportant traits for ErrInto<Fut, E>default fn err_into<E>(self) -> ErrInto<Self, E> where
Self::Error: Into<E>,
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Self::Error: Into<E>,
Maps this future's Error
to a new error type using the Into
trait. Read more
ⓘImportant traits for AndThen<Fut1, Fut2, F>default 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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F: FnOnce(Self::Ok) -> Fut,
Fut: TryFuture<Error = Self::Error>,
Executes another future after this one resolves successfully. The success value is passed to a closure to create this subsequent future. Read more
ⓘImportant traits for OrElse<Fut1, Fut2, F>default 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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F: FnOnce(Self::Error) -> Fut,
Fut: TryFuture<Ok = Self::Ok>,
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
ⓘImportant traits for UnwrapOrElse<Fut, F>default fn unwrap_or_else<F>(self, f: F) -> UnwrapOrElse<Self, F> where
F: FnOnce(Self::Error) -> Self::Ok,
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F: FnOnce(Self::Error) -> Self::Ok,
Unwraps this future's ouput, producing a future with this future's Ok
type as its Output
type. Read more
ⓘImportant traits for Compat<R>default fn compat(self) -> Compat<Self> where
Self: Unpin,
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Self: Unpin,
Wraps a [TryFuture
] into a future compatable with libraries using futures 0.1 future definitons. Requires the compat
feature to enable. Read more
ⓘImportant traits for IntoFuture<Fut>default fn into_future(self) -> IntoFuture<Self>
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Wraps a [TryFuture
] into a type that implements Future
. Read more