Struct async_std::stream::Pending

source · [−]

pub struct Pending<T> { /* private fields */ }

Expand description

A stream that never returns any items.

This stream is created by the pending function. See its documentation for more.

Trait Implementations

source

impl<T: Debug> Debug for Pending<T>

source

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

source

impl<T> DoubleEndedStream for Pending<T>

source

fn poll_next_back(self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Option<T>>

Attempts to receive the next item from the back of the stream. Read more

source

fn next_back(&mut self) -> NextBackFuture<'_, Self> where
Self: Unpin,

Advances the stream and returns the next value. Read more

source

fn nth_back(&mut self, n: usize) -> NthBackFuture<'_, Self> where
Self: Unpin + Sized,

Returns the nth element from the back of the stream. Read more

source

fn rfind(&mut self, p: P) -> RFindFuture<'_, Self, P> where
Self: Unpin + Sized,
P: FnMut(&Self::Item) -> bool,

Returns the the frist element from the right that matches the predicate. Read more

source

fn rfold<B, F>(self, accum: B, f: F) -> RFoldFuture<Self, F, B> where
Self: Sized,
F: FnMut(B, Self::Item) -> B,

Examples Read more

source

fn try_rfold<B, F, E>(self, accum: B, f: F) -> TryRFoldFuture<Self, F, B> where
Self: Sized,
F: FnMut(B, Self::Item) -> Result<B, E>,

A combinator that applies a function as long as it returns successfully, producing a single, final value. Immediately returns the error when the function returns unsuccessfully. Read more

source

impl<T> ExactSizeStream for Pending<T>

source

fn len(&self) -> usize

Returns the exact number of times the stream will iterate. Read more

source

impl<T> Stream for Pending<T>

type Item = T

Values yielded by the stream.

source

fn poll_next(self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Option<T>>

Attempt to pull out the next value of this stream, registering the current task for wakeup if the value is not yet available, and returning None if the stream is exhausted. Read more

source

fn size_hint(&self) -> (usize, Option<usize>)

Returns the bounds on the remaining length of the stream. Read more

source

impl<T> FusedStream for Pending<T>

Auto Trait Implementations

impl<T> RefUnwindSafe for Pending<T> where
T: RefUnwindSafe,

impl<T> Send for Pending<T> where
T: Send,

impl<T> Sync for Pending<T> where
T: Sync,

impl<T> Unpin for Pending<T> where
T: Unpin,

impl<T> UnwindSafe for Pending<T> where
T: UnwindSafe,

Blanket Implementations

source

impl<T> Any for T where
T: 'static + ?Sized,

source

pub fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

source

impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

pub fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

source

impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

pub fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

source

impl<T> From<T> for T

const: unstable · source

pub fn from(t: T) -> T

Returns the argument unchanged.

source

impl<T, U> Into for T where
U: From<T>,

const: unstable · source

pub fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

source

impl<S> StreamExt for S where
S: Stream + ?Sized,

source

fn poll_next(&mut self, cx: &mut Context<'_>) -> Poll<Option<Self::Item>> where
Self: Unpin,

A convenience for calling Stream::poll_next() on !Unpin types.

source

fn next(&mut self) -> NextFuture<'_, Self>ⓘNotable traits for NextFuture<'_, S>`impl<'_, S> Future for NextFuture<'_, S> where S: Stream + Unpin + ?Sized, type Output = Option<<S as Stream>::Item>;` where
Self: Unpin,

Retrieves the next item in the stream. Read more

source

fn try_next<T, E>(&mut self) -> TryNextFuture<'_, Self>ⓘNotable traits for TryNextFuture<'_, S>`impl<'_, T, E, S> Future for TryNextFuture<'_, S> where S: Stream<Item = Result<T, E>> + Unpin + ?Sized, type Output = Result<Option<T>, E>;` where
Self: Stream<Item = Result<T, E>> + Unpin,

Retrieves the next item in the stream. Read more

source

fn count(self) -> CountFuture<Self>ⓘNotable traits for CountFuture<S>`impl<S> Future for CountFuture<S> where S: Stream + ?Sized, type Output = usize;`

Counts the number of items in the stream. Read more

source

fn map<T, F>(self, f: F) -> Map<Self, F> where
F: FnMut(Self::Item) -> T,

Maps items of the stream to new values using a closure. Read more

source

fn flat_map<U, F>(self, f: F) -> FlatMap<Self, U, F> where
U: Stream,
F: FnMut(Self::Item) -> U,

Maps items to streams and then concatenates them. Read more

source

fn flatten(self) -> Flatten<Self> where
Self::Item: Stream,

Concatenates inner streams. Read more

source

fn then<F, Fut>(self, f: F) -> Then<Self, F, Fut> where
F: FnMut(Self::Item) -> Fut,
Fut: Future,

Maps items of the stream to new values using an async closure. Read more

source

fn filter(self, predicate: P) -> Filter<Self, P> where
P: FnMut(&Self::Item) -> bool,

Keeps items of the stream for which predicate returns true. Read more

source

fn filter_map<T, F>(self, f: F) -> FilterMap<Self, F> where
F: FnMut(Self::Item) -> Option<T>,

Filters and maps items of the stream using a closure. Read more

source

fn take(self, n: usize) -> Take<Self>

Takes only the first n items of the stream. Read more

source

fn take_while(self, predicate: P) -> TakeWhile<Self, P> where
P: FnMut(&Self::Item) -> bool,

Takes items while predicate returns true. Read more

source

fn skip(self, n: usize) -> Skip<Self>

Skips the first n items of the stream. Read more

source

fn skip_while(self, predicate: P) -> SkipWhile<Self, P> where
P: FnMut(&Self::Item) -> bool,

Skips items while predicate returns true. Read more

source

fn step_by(self, step: usize) -> StepBy<Self>

Yields every stepth item. Read more

source

fn chain(self, other: U) -> Chain<Self, U> where
U: Stream<Item = Self::Item>,

Appends another stream to the end of this one. Read more

source

fn cloned<'a, T>(self) -> Cloned<Self> where
Self: Stream<Item = &'a T>,
T: 'a + Clone,

Clones all items. Read more

source

fn copied<'a, T>(self) -> Copied<Self> where
Self: Stream<Item = &'a T>,
T: 'a + Copy,

Copies all items. Read more

source

fn collect<C>(self) -> CollectFuture<Self, C>ⓘNotable traits for CollectFuture<S, C>`impl<S, C> Future for CollectFuture<S, C> where S: Stream, C: Default + Extend<<S as Stream>::Item>, type Output = C;` where
C: Default + Extend<Self::Item>,

Collects all items in the stream into a collection. Read more

source

fn try_collect<T, E, C>(self) -> TryCollectFuture<Self, C>ⓘNotable traits for TryCollectFuture<S, C>`impl<T, E, S, C> Future for TryCollectFuture<S, C> where S: Stream<Item = Result<T, E>>, C: Default + Extend<T>, type Output = Result<C, E>;` where
 Self: Stream<Item = Result<T, E>>,
 C: Default + Extend<T>,

Collects all items in the fallible stream into a collection. Read more

source

fn partition<B, P>(self, predicate: P) -> PartitionFuture<Self, P, B>ⓘNotable traits for PartitionFuture<S, P, B>`impl<S, P, B> Future for PartitionFuture<S, P, B> where S: Stream, P: FnMut(&<S as Stream>::Item) -> bool, B: Default + Extend<<S as Stream>::Item>, type Output = (B, B);` where
 B: Default + Extend<Self::Item>,
 P: FnMut(&Self::Item) -> bool,

Partitions items into those for which predicate is true and those for which it is false, and then collects them into two collections. Read more

source

fn fold<T, F>(self, init: T, f: F) -> FoldFuture<Self, F, T>ⓘNotable traits for FoldFuture<S, F, T>`impl<S, F, T> Future for FoldFuture<S, F, T> where S: Stream, F: FnMut(T, <S as Stream>::Item) -> T, type Output = T;` where
F: FnMut(T, Self::Item) -> T,

Accumulates a computation over the stream. Read more

source

fn try_fold<T, E, F, B>(
 &mut self,
 init: B,
 f: F
) -> TryFoldFuture<'_, Self, F, B>ⓘNotable traits for TryFoldFuture<'a, S, F, B>`impl<'a, T, E, S, F, B> Future for TryFoldFuture<'a, S, F, B> where S: Stream<Item = Result<T, E>> + Unpin, F: FnMut(B, T) -> Result<B, E>, type Output = Result<B, E>;` where
 Self: Stream<Item = Result<T, E>> + Unpin,
 F: FnMut(B, T) -> Result<B, E>,

Accumulates a fallible computation over the stream. Read more

source

fn scan<St, B, F>(self, initial_state: St, f: F) -> Scan<Self, St, F> where
F: FnMut(&mut St, Self::Item) -> Option,

Maps items of the stream to new values using a state value and a closure. Read more

source

fn fuse(self) -> Fuse<Self>

Fuses the stream so that it stops yielding items after the first None. Read more

source

fn cycle(self) -> Cycle<Self> where
Self: Clone,

Repeats the stream from beginning to end, forever. Read more

source

fn enumerate(self) -> Enumerate<Self>

Enumerates items, mapping them to (index, item). Read more

source

fn inspect<F>(self, f: F) -> Inspect<Self, F> where
F: FnMut(&Self::Item),

Calls a closure on each item and passes it on. Read more

source

fn nth(&mut self, n: usize) -> NthFuture<'_, Self>ⓘNotable traits for NthFuture<'a, S>`impl<'a, S> Future for NthFuture<'a, S> where S: Stream + Unpin + ?Sized, type Output = Option<<S as Stream>::Item>;` where
Self: Unpin,

Gets the nth item of the stream. Read more

source

fn last(self) -> LastFuture<Self>ⓘNotable traits for LastFuture<S>`impl<S> Future for LastFuture<S> where S: Stream, type Output = Option<<S as Stream>::Item>;`

Returns the last item in the stream. Read more

source

fn find(&mut self, predicate: P) -> FindFuture<'_, Self, P>ⓘNotable traits for FindFuture<'a, S, P>`impl<'a, S, P> Future for FindFuture<'a, S, P> where S: Stream + Unpin + ?Sized, P: FnMut(&<S as Stream>::Item) -> bool, type Output = Option<<S as Stream>::Item>;` where
 Self: Unpin,
 P: FnMut(&Self::Item) -> bool,

Finds the first item of the stream for which predicate returns true. Read more

source

fn find_map<F, B>(&mut self, f: F) -> FindMapFuture<'_, Self, F>ⓘNotable traits for FindMapFuture<'a, S, F>`impl<'a, S, B, F> Future for FindMapFuture<'a, S, F> where S: Stream + Unpin + ?Sized, F: FnMut(<S as Stream>::Item) -> Option, type Output = Option;` where
 Self: Unpin,
 F: FnMut(Self::Item) -> Option,

Applies a closure to items in the stream and returns the first Some result. Read more

source

fn position(&mut self, predicate: P) -> PositionFuture<'_, Self, P>ⓘNotable traits for PositionFuture<'a, S, P>`impl<'a, S, P> Future for PositionFuture<'a, S, P> where S: Stream + Unpin + ?Sized, P: FnMut(<S as Stream>::Item) -> bool, type Output = Option<usize>;` where
 Self: Unpin,
 P: FnMut(Self::Item) -> bool,

Finds the index of the first item of the stream for which predicate returns true. Read more

source

fn all(&mut self, predicate: P) -> AllFuture<'_, Self, P>ⓘNotable traits for AllFuture<'_, S, P>`impl<'_, S, P> Future for AllFuture<'_, S, P> where S: Stream + Unpin + ?Sized, P: FnMut(<S as Stream>::Item) -> bool, type Output = bool;` where
 Self: Unpin,
 P: FnMut(Self::Item) -> bool,

Tests if predicate returns true for all items in the stream. Read more

source

fn any(&mut self, predicate: P) -> AnyFuture<'_, Self, P>ⓘNotable traits for AnyFuture<'_, S, P>`impl<'_, S, P> Future for AnyFuture<'_, S, P> where S: Stream + Unpin + ?Sized, P: FnMut(<S as Stream>::Item) -> bool, type Output = bool;` where
 Self: Unpin,
 P: FnMut(Self::Item) -> bool,

Tests if predicate returns true for any item in the stream. Read more

source

fn for_each<F>(self, f: F) -> ForEachFuture<Self, F>ⓘNotable traits for ForEachFuture<S, F>`impl<S, F> Future for ForEachFuture<S, F> where S: Stream, F: FnMut(<S as Stream>::Item), type Output = ();` where
F: FnMut(Self::Item),

Calls a closure on each item of the stream. Read more

source

fn try_for_each<F, E>(&mut self, f: F) -> TryForEachFuture<'_, Self, F>ⓘNotable traits for TryForEachFuture<'a, S, F>`impl<'a, S, F, E> Future for TryForEachFuture<'a, S, F> where S: Stream + Unpin + ?Sized, F: FnMut(<S as Stream>::Item) -> Result<(), E>, type Output = Result<(), E>;` where
 Self: Unpin,
 F: FnMut(Self::Item) -> Result<(), E>,

Calls a fallible closure on each item of the stream, stopping on first error. Read more

source

fn zip(self, other: U) -> Zip<Self, U> where
U: Stream,

Zips up two streams into a single stream of pairs. Read more

source

fn unzip<A, B, FromA, FromB>(self) -> UnzipFuture<Self, FromA, FromB>ⓘNotable traits for UnzipFuture<S, FromA, FromB>`impl<S, A, B, FromA, FromB> Future for UnzipFuture<S, FromA, FromB> where S: Stream<Item = (A, B)>, FromA: Default + Extend<A>, FromB: Default + Extend, type Output = (FromA, FromB);` where
 FromA: Default + Extend<A>,
 FromB: Default + Extend,
 Self: Stream<Item = (A, B)>,

Collects a stream of pairs into a pair of collections. Read more

source

fn or<S>(self, other: S) -> Or<Self, S> where
S: Stream<Item = Self::Item>,

Merges with other stream, preferring items from self whenever both streams are ready. Read more

source

fn race<S>(self, other: S) -> Race<Self, S> where
S: Stream<Item = Self::Item>,

Merges with other stream, with no preference for either stream when both are ready. Read more

source

fn boxed<'a>(
 self
) -> Pin<Box<dyn Stream<Item = Self::Item> + Send + 'a, Global>>ⓘNotable traits for Pin`impl Future for Pin where P: DerefMut, ::Target: Future, type Output = <::Target as Future>::Output;` where
 Self: 'a + Send,

Boxes the stream and changes its type to dyn Stream + Send + 'a. Read more

source

fn boxed_local<'a>(self) -> Pin<Box<dyn Stream<Item = Self::Item> + 'a, Global>>ⓘNotable traits for Pin`impl Future for Pin where P: DerefMut, ::Target: Future, type Output = <::Target as Future>::Output;` where
Self: 'a,

Boxes the stream and changes its type to dyn Stream + 'a. Read more

source

impl<T, U> TryFrom for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

pub fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>

Performs the conversion.

source

impl<T, U> TryInto for T where
U: TryFrom<T>,

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

pub fn try_into(self) -> Result<U, >::Error>

Performs the conversion.

source

impl<S, T, E> TryStream for S where
S: Stream<Item = Result<T, E>> + ?Sized,

type Ok = T

The type of successful values yielded by this future

type Error = E

The type of failures yielded by this future

source

pub fn try_poll_next(
self: Pin<&mut S>,
cx: &mut Context<'_>
) -> Poll<Option<Result<<S as TryStream>::Ok, <S as TryStream>::Error>>>

Poll this TryStream as if it were a Stream. Read more

Struct async_std::stream::Pending

Trait Implementations

impl<T: Debug> Debug for Pending<T>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

impl<T> DoubleEndedStream for Pending<T>

fn poll_next_back(self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Option<T>>

fn next_back(&mut self) -> NextBackFuture<'_, Self> where Self: Unpin,

fn nth_back(&mut self, n: usize) -> NthBackFuture<'_, Self> where Self: Unpin + Sized,

fn rfind<P>(&mut self, p: P) -> RFindFuture<'_, Self, P> where Self: Unpin + Sized, P: FnMut(&Self::Item) -> bool,

fn rfold<B, F>(self, accum: B, f: F) -> RFoldFuture<Self, F, B> where Self: Sized, F: FnMut(B, Self::Item) -> B,

fn try_rfold<B, F, E>(self, accum: B, f: F) -> TryRFoldFuture<Self, F, B> where Self: Sized, F: FnMut(B, Self::Item) -> Result<B, E>,

impl<T> ExactSizeStream for Pending<T>

fn len(&self) -> usize

impl<T> Stream for Pending<T>

type Item = T

fn poll_next(self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Option<T>>

fn size_hint(&self) -> (usize, Option<usize>)

impl<T> FusedStream for Pending<T>

Auto Trait Implementations

impl<T> RefUnwindSafe for Pending<T> where T: RefUnwindSafe,

impl<T> Send for Pending<T> where T: Send,

impl<T> Sync for Pending<T> where T: Sync,

impl<T> Unpin for Pending<T> where T: Unpin,

impl<T> UnwindSafe for Pending<T> where T: UnwindSafe,

Blanket Implementations

impl<T> Any for T where T: 'static + ?Sized,

pub fn type_id(&self) -> TypeId

impl<T> Borrow<T> for T where T: ?Sized,

pub fn borrow(&self) -> &T

impl<T> BorrowMut<T> for T where T: ?Sized,

pub fn borrow_mut(&mut self) -> &mut T

impl<T> From<T> for T

pub fn from(t: T) -> T

impl<T, U> Into<U> for T where U: From<T>,

pub fn into(self) -> U

impl<S> StreamExt for S where S: Stream + ?Sized,

fn poll_next(&mut self, cx: &mut Context<'_>) -> Poll<Option<Self::Item>> where Self: Unpin,

fn next(&mut self) -> NextFuture<'_, Self>ⓘNotable traits for NextFuture<'_, S>impl<'_, S> Future for NextFuture<'_, S> where S: Stream + Unpin + ?Sized, type Output = Option<<S as Stream>::Item>; where Self: Unpin,

fn try_next<T, E>(&mut self) -> TryNextFuture<'_, Self>ⓘNotable traits for TryNextFuture<'_, S>impl<'_, T, E, S> Future for TryNextFuture<'_, S> where S: Stream<Item = Result<T, E>> + Unpin + ?Sized, type Output = Result<Option<T>, E>; where Self: Stream<Item = Result<T, E>> + Unpin,

fn count(self) -> CountFuture<Self>ⓘNotable traits for CountFuture<S>impl<S> Future for CountFuture<S> where S: Stream + ?Sized, type Output = usize;

fn map<T, F>(self, f: F) -> Map<Self, F> where F: FnMut(Self::Item) -> T,

fn flat_map<U, F>(self, f: F) -> FlatMap<Self, U, F> where U: Stream, F: FnMut(Self::Item) -> U,

fn flatten(self) -> Flatten<Self> where Self::Item: Stream,

fn then<F, Fut>(self, f: F) -> Then<Self, F, Fut> where F: FnMut(Self::Item) -> Fut, Fut: Future,

fn filter<P>(self, predicate: P) -> Filter<Self, P> where P: FnMut(&Self::Item) -> bool,

fn filter_map<T, F>(self, f: F) -> FilterMap<Self, F> where F: FnMut(Self::Item) -> Option<T>,

fn take(self, n: usize) -> Take<Self>

fn take_while<P>(self, predicate: P) -> TakeWhile<Self, P> where P: FnMut(&Self::Item) -> bool,

fn skip(self, n: usize) -> Skip<Self>

fn skip_while<P>(self, predicate: P) -> SkipWhile<Self, P> where P: FnMut(&Self::Item) -> bool,

fn step_by(self, step: usize) -> StepBy<Self>

fn chain<U>(self, other: U) -> Chain<Self, U> where U: Stream<Item = Self::Item>,

fn cloned<'a, T>(self) -> Cloned<Self> where Self: Stream<Item = &'a T>, T: 'a + Clone,

fn copied<'a, T>(self) -> Copied<Self> where Self: Stream<Item = &'a T>, T: 'a + Copy,

fn collect<C>(self) -> CollectFuture<Self, C>ⓘNotable traits for CollectFuture<S, C>impl<S, C> Future for CollectFuture<S, C> where S: Stream, C: Default + Extend<<S as Stream>::Item>, type Output = C; where C: Default + Extend<Self::Item>,

fn fold<T, F>(self, init: T, f: F) -> FoldFuture<Self, F, T>ⓘNotable traits for FoldFuture<S, F, T>impl<S, F, T> Future for FoldFuture<S, F, T> where S: Stream, F: FnMut(T, <S as Stream>::Item) -> T, type Output = T; where F: FnMut(T, Self::Item) -> T,

fn scan<St, B, F>(self, initial_state: St, f: F) -> Scan<Self, St, F> where F: FnMut(&mut St, Self::Item) -> Option<B>,

fn fuse(self) -> Fuse<Self>

fn cycle(self) -> Cycle<Self> where Self: Clone,

fn enumerate(self) -> Enumerate<Self>

fn inspect<F>(self, f: F) -> Inspect<Self, F> where F: FnMut(&Self::Item),

fn nth(&mut self, n: usize) -> NthFuture<'_, Self>ⓘNotable traits for NthFuture<'a, S>impl<'a, S> Future for NthFuture<'a, S> where S: Stream + Unpin + ?Sized, type Output = Option<<S as Stream>::Item>; where Self: Unpin,

fn last(self) -> LastFuture<Self>ⓘNotable traits for LastFuture<S>impl<S> Future for LastFuture<S> where S: Stream, type Output = Option<<S as Stream>::Item>;

fn all<P>(&mut self, predicate: P) -> AllFuture<'_, Self, P>ⓘNotable traits for AllFuture<'_, S, P>impl<'_, S, P> Future for AllFuture<'_, S, P> where S: Stream + Unpin + ?Sized, P: FnMut(<S as Stream>::Item) -> bool, type Output = bool; where Self: Unpin, P: FnMut(Self::Item) -> bool,

fn any<P>(&mut self, predicate: P) -> AnyFuture<'_, Self, P>ⓘNotable traits for AnyFuture<'_, S, P>impl<'_, S, P> Future for AnyFuture<'_, S, P> where S: Stream + Unpin + ?Sized, P: FnMut(<S as Stream>::Item) -> bool, type Output = bool; where Self: Unpin, P: FnMut(Self::Item) -> bool,

fn for_each<F>(self, f: F) -> ForEachFuture<Self, F>ⓘNotable traits for ForEachFuture<S, F>impl<S, F> Future for ForEachFuture<S, F> where S: Stream, F: FnMut(<S as Stream>::Item), type Output = (); where F: FnMut(Self::Item),

fn zip<U>(self, other: U) -> Zip<Self, U> where U: Stream,

fn or<S>(self, other: S) -> Or<Self, S> where S: Stream<Item = Self::Item>,

fn race<S>(self, other: S) -> Race<Self, S> where S: Stream<Item = Self::Item>,

fn boxed<'a>( self) -> Pin<Box<dyn Stream<Item = Self::Item> + Send + 'a, Global>>ⓘNotable traits for Pin<P>impl<P> Future for Pin<P> where P: DerefMut, <P as Deref>::Target: Future, type Output = <<P as Deref>::Target as Future>::Output; where Self: 'a + Send,

fn boxed_local<'a>(self) -> Pin<Box<dyn Stream<Item = Self::Item> + 'a, Global>>ⓘNotable traits for Pin<P>impl<P> Future for Pin<P> where P: DerefMut, <P as Deref>::Target: Future, type Output = <<P as Deref>::Target as Future>::Output; where Self: 'a,

impl<T, U> TryFrom<U> for T where U: Into<T>,

type Error = Infallible

pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for T where U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

impl<S, T, E> TryStream for S where S: Stream<Item = Result<T, E>> + ?Sized,

type Ok = T

type Error = E

fn next_back(&mut self) -> NextBackFuture<'_, Self> where
Self: Unpin,

fn nth_back(&mut self, n: usize) -> NthBackFuture<'_, Self> where
Self: Unpin + Sized,

fn rfind<P>(&mut self, p: P) -> RFindFuture<'_, Self, P> where
Self: Unpin + Sized,
P: FnMut(&Self::Item) -> bool,

fn rfold<B, F>(self, accum: B, f: F) -> RFoldFuture<Self, F, B> where
Self: Sized,
F: FnMut(B, Self::Item) -> B,

fn try_rfold<B, F, E>(self, accum: B, f: F) -> TryRFoldFuture<Self, F, B> where
Self: Sized,
F: FnMut(B, Self::Item) -> Result<B, E>,

impl<T> RefUnwindSafe for Pending<T> where
T: RefUnwindSafe,

impl<T> Send for Pending<T> where
T: Send,

impl<T> Sync for Pending<T> where
T: Sync,

impl<T> Unpin for Pending<T> where
T: Unpin,

impl<T> UnwindSafe for Pending<T> where
T: UnwindSafe,

impl<T> Any for T where
T: 'static + ?Sized,

impl<T> Borrow<T> for T where
T: ?Sized,

impl<T> BorrowMut<T> for T where
T: ?Sized,

impl<T, U> Into<U> for T where
U: From<T>,

impl<S> StreamExt for S where
S: Stream + ?Sized,

fn poll_next(&mut self, cx: &mut Context<'_>) -> Poll<Option<Self::Item>> where
Self: Unpin,

fn next(&mut self) -> NextFuture<'_, Self>ⓘNotable traits for NextFuture<'_, S>`impl<'_, S> Future for NextFuture<'_, S> where S: Stream + Unpin + ?Sized, type Output = Option<<S as Stream>::Item>;` where
Self: Unpin,

fn try_next<T, E>(&mut self) -> TryNextFuture<'_, Self>ⓘNotable traits for TryNextFuture<'_, S>`impl<'_, T, E, S> Future for TryNextFuture<'_, S> where S: Stream<Item = Result<T, E>> + Unpin + ?Sized, type Output = Result<Option<T>, E>;` where
Self: Stream<Item = Result<T, E>> + Unpin,

fn count(self) -> CountFuture<Self>ⓘNotable traits for CountFuture<S>`impl<S> Future for CountFuture<S> where S: Stream + ?Sized, type Output = usize;`

fn map<T, F>(self, f: F) -> Map<Self, F> where
F: FnMut(Self::Item) -> T,

fn flat_map<U, F>(self, f: F) -> FlatMap<Self, U, F> where
U: Stream,
F: FnMut(Self::Item) -> U,

fn flatten(self) -> Flatten<Self> where
Self::Item: Stream,

fn then<F, Fut>(self, f: F) -> Then<Self, F, Fut> where
F: FnMut(Self::Item) -> Fut,
Fut: Future,

fn filter<P>(self, predicate: P) -> Filter<Self, P> where
P: FnMut(&Self::Item) -> bool,

fn filter_map<T, F>(self, f: F) -> FilterMap<Self, F> where
F: FnMut(Self::Item) -> Option<T>,

fn take_while<P>(self, predicate: P) -> TakeWhile<Self, P> where
P: FnMut(&Self::Item) -> bool,

fn skip_while<P>(self, predicate: P) -> SkipWhile<Self, P> where
P: FnMut(&Self::Item) -> bool,

fn chain<U>(self, other: U) -> Chain<Self, U> where
U: Stream<Item = Self::Item>,

fn cloned<'a, T>(self) -> Cloned<Self> where
Self: Stream<Item = &'a T>,
T: 'a + Clone,

fn copied<'a, T>(self) -> Copied<Self> where
Self: Stream<Item = &'a T>,
T: 'a + Copy,

fn collect<C>(self) -> CollectFuture<Self, C>ⓘNotable traits for CollectFuture<S, C>`impl<S, C> Future for CollectFuture<S, C> where S: Stream, C: Default + Extend<<S as Stream>::Item>, type Output = C;` where
C: Default + Extend<Self::Item>,

fn fold<T, F>(self, init: T, f: F) -> FoldFuture<Self, F, T>ⓘNotable traits for FoldFuture<S, F, T>`impl<S, F, T> Future for FoldFuture<S, F, T> where S: Stream, F: FnMut(T, <S as Stream>::Item) -> T, type Output = T;` where
F: FnMut(T, Self::Item) -> T,

fn scan<St, B, F>(self, initial_state: St, f: F) -> Scan<Self, St, F> where
F: FnMut(&mut St, Self::Item) -> Option<B>,

fn cycle(self) -> Cycle<Self> where
Self: Clone,

fn inspect<F>(self, f: F) -> Inspect<Self, F> where
F: FnMut(&Self::Item),

fn nth(&mut self, n: usize) -> NthFuture<'_, Self>ⓘNotable traits for NthFuture<'a, S>`impl<'a, S> Future for NthFuture<'a, S> where S: Stream + Unpin + ?Sized, type Output = Option<<S as Stream>::Item>;` where
Self: Unpin,

fn last(self) -> LastFuture<Self>ⓘNotable traits for LastFuture<S>`impl<S> Future for LastFuture<S> where S: Stream, type Output = Option<<S as Stream>::Item>;`

fn all<P>(&mut self, predicate: P) -> AllFuture<'_, Self, P>ⓘNotable traits for AllFuture<'_, S, P>`impl<'_, S, P> Future for AllFuture<'_, S, P> where S: Stream + Unpin + ?Sized, P: FnMut(<S as Stream>::Item) -> bool, type Output = bool;` where
Self: Unpin,
P: FnMut(Self::Item) -> bool,

fn any<P>(&mut self, predicate: P) -> AnyFuture<'_, Self, P>ⓘNotable traits for AnyFuture<'_, S, P>`impl<'_, S, P> Future for AnyFuture<'_, S, P> where S: Stream + Unpin + ?Sized, P: FnMut(<S as Stream>::Item) -> bool, type Output = bool;` where
Self: Unpin,
P: FnMut(Self::Item) -> bool,

fn for_each<F>(self, f: F) -> ForEachFuture<Self, F>ⓘNotable traits for ForEachFuture<S, F>`impl<S, F> Future for ForEachFuture<S, F> where S: Stream, F: FnMut(<S as Stream>::Item), type Output = ();` where
F: FnMut(Self::Item),

fn zip<U>(self, other: U) -> Zip<Self, U> where
U: Stream,

fn or<S>(self, other: S) -> Or<Self, S> where
S: Stream<Item = Self::Item>,

fn race<S>(self, other: S) -> Race<Self, S> where
S: Stream<Item = Self::Item>,

fn boxed<'a>(
self
) -> Pin<Box<dyn Stream<Item = Self::Item> + Send + 'a, Global>>ⓘNotable traits for Pin<P>`impl<P> Future for Pin<P> where P: DerefMut, <P as Deref>::Target: Future, type Output = <<P as Deref>::Target as Future>::Output;` where
Self: 'a + Send,

fn boxed_local<'a>(self) -> Pin<Box<dyn Stream<Item = Self::Item> + 'a, Global>>ⓘNotable traits for Pin<P>`impl<P> Future for Pin<P> where P: DerefMut, <P as Deref>::Target: Future, type Output = <<P as Deref>::Target as Future>::Output;` where
Self: 'a,

impl<T, U> TryFrom<U> for T where
U: Into<T>,

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

impl<S, T, E> TryStream for S where
S: Stream<Item = Result<T, E>> + ?Sized,

pub fn try_poll_next(
self: Pin<&mut S>,
cx: &mut Context<'_>
) -> Poll<Option<Result<<S as TryStream>::Ok, <S as TryStream>::Error>>>