Struct MapErr

#[must_use = "futures/streams/sinks do nothing unless you `.await` or poll them"]
pub struct MapErr<St, F> { /* private fields */ }

Stream for the map_err method.

Implementations

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

fn get_ref(&self) -> &St

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

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.

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

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.

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

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

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<_Item, St, F> Sink<_Item> for MapErr<St, F> where Map<IntoStream<St>, MapErrFn<F>>: Sink<_Item>,

type Error = <Map<IntoStream<St>, MapErrFn<F>> as Sink<_Item>>::Error;
fn poll_ready(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>>
fn start_send(self: Pin<&mut Self>, item: _Item) -> Result<(), Self::Error>
fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>>
fn poll_close(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>>

Auto Trait Implementations

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

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

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

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

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

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

Blanket Implementations

impl<S> TryStreamExt for MapErr<St, F> where S: TryStream + ?Sized,

impl<S, T, E> TryStream for MapErr<St, F> 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>>>

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

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for MapErr<St, F> where T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for MapErr<St, F> where T: ?Sized,

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

impl<T> From<T> for MapErr<St, F>

fn from(t: T) -> T

Returns the argument unchanged.

impl<T> StreamExt for MapErr<St, F> where T: Stream + ?Sized,

impl<T, Item> SinkExt<Item> for MapErr<St, F> where T: Sink<Item> + ?Sized,

impl<T, U> Into<U> for MapErr<St, F> where U: From<T>,

fn into(self) -> U

Calls U::from(self).

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

impl<T, U> TryFrom<U> for MapErr<St, F> where U: Into<T>,

type Error = never;
fn try_from(value: U) -> Result<T, never>

impl<T, U> TryInto<U> for MapErr<St, F> where U: TryFrom<T>,

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