Struct futures_util::stream::MapErr

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pub struct MapErr<St, F> { /* private fields */ }

Expand description

Stream for the map_err method.

Implementations

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impl<St, F> MapErr<St, F>

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pub fn get_ref(&self) -> &St

Acquires a reference to the underlying sink or stream that this combinator is pulling from.

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pub fn get_mut(&mut self) -> &mut St

Acquires a mutable reference to the underlying sink or stream that this combinator is pulling from.

Note that care must be taken to avoid tampering with the state of the sink or stream which may otherwise confuse this combinator.

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pub fn get_pin_mut(self: Pin<&mut Self>) -> Pin<&mut St>ⓘNotable traits for Pin`impl Future for Pin where P: DerefMut, ::Target: Future, type Output = <::Target as Future>::Output;`

Acquires a pinned mutable reference to the underlying sink or stream that this combinator is pulling from.

Note that care must be taken to avoid tampering with the state of the sink or stream which may otherwise confuse this combinator.

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pub fn into_inner(self) -> St

Consumes this combinator, returning the underlying sink or stream.

Note that this may discard intermediate state of this combinator, so care should be taken to avoid losing resources when this is called.

Trait Implementations

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impl<St, F> Debug for MapErr<St, F> where
Map<IntoStream<St>, MapErrFn<F>>: Debug,

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

Formats the value using the given formatter. Read more

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impl<St, F> FusedStream for MapErr<St, F> where
Map<IntoStream<St>, MapErrFn<F>>: FusedStream,

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fn is_terminated(&self) -> bool

Returns true if the stream should no longer be polled.

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impl<St, F> Stream for MapErr<St, F> where
Map<IntoStream<St>, MapErrFn<F>>: Stream,

type Item = <Map<IntoStream<St>, MapErrFn<F>> as Stream>::Item

Values yielded by the stream.

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

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

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

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

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impl<'pin, St, F> Unpin for MapErr<St, F> where
Origin<'__pin, St, F>: Unpin,

Auto Trait Implementations

impl<St, F> RefUnwindSafe for MapErr<St, F> where
F: RefUnwindSafe,
St: RefUnwindSafe,

impl<St, F> Send for MapErr<St, F> where
F: Send,
St: Send,

impl<St, F> Sync for MapErr<St, F> where
F: Sync,
St: Sync,

impl<St, F> UnwindSafe for MapErr<St, F> where
F: UnwindSafe,
St: UnwindSafe,

Blanket Implementations

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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

const: unstable · source

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

Mutably borrows from an owned value. Read more

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impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

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

const: unstable · source

fn into(self) -> U

Calls U::from(self).

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

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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

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

Performs the conversion.

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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

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

Performs the conversion.

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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

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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 futures_util::stream::MapErr

Implementations

impl<St, F> MapErr<St, F>

pub fn get_ref(&self) -> &St

pub fn get_mut(&mut self) -> &mut St

pub fn get_pin_mut(self: Pin<&mut Self>) -> Pin<&mut St>ⓘ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;

pub fn into_inner(self) -> St

Trait Implementations

impl<St, F> Debug for MapErr<St, F> where Map<IntoStream<St>, MapErrFn<F>>: Debug,

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

impl<St, F> FusedStream for MapErr<St, F> where Map<IntoStream<St>, MapErrFn<F>>: FusedStream,

fn is_terminated(&self) -> bool

impl<St, F> Stream for MapErr<St, F> where Map<IntoStream<St>, MapErrFn<F>>: Stream,

type Item = <Map<IntoStream<St>, MapErrFn<F>> as Stream>::Item

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

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

impl<'__pin, St, F> Unpin for MapErr<St, F> where __Origin<'__pin, St, F>: Unpin,

Auto Trait Implementations

impl<St, F> RefUnwindSafe for MapErr<St, F> where F: RefUnwindSafe, St: RefUnwindSafe,

impl<St, F> Send for MapErr<St, F> where F: Send, St: Send,

impl<St, F> Sync for MapErr<St, F> where F: Sync, St: Sync,

impl<St, F> UnwindSafe for MapErr<St, F> where F: UnwindSafe, St: UnwindSafe,

Blanket Implementations

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

fn type_id(&self) -> TypeId

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

fn borrow(&self) -> &T

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

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

impl<T> From<T> for T

fn from(t: T) -> T

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

fn into(self) -> U

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

type Error = Infallible

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

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

pub fn get_pin_mut(self: Pin<&mut Self>) -> Pin<&mut St>ⓘ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;`

impl<St, F> Debug for MapErr<St, F> where
Map<IntoStream<St>, MapErrFn<F>>: Debug,

impl<St, F> FusedStream for MapErr<St, F> where
Map<IntoStream<St>, MapErrFn<F>>: FusedStream,

impl<St, F> Stream for MapErr<St, F> where
Map<IntoStream<St>, MapErrFn<F>>: Stream,

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

impl<'pin, St, F> Unpin for MapErr<St, F> where
Origin<'__pin, St, F>: Unpin,

impl<St, F> RefUnwindSafe for MapErr<St, F> where
F: RefUnwindSafe,
St: RefUnwindSafe,

impl<St, F> Send for MapErr<St, F> where
F: Send,
St: Send,

impl<St, F> Sync for MapErr<St, F> where
F: Sync,
St: Sync,

impl<St, F> UnwindSafe for MapErr<St, F> where
F: UnwindSafe,
St: 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<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,

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