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TryStreamWithId

Struct TryStreamWithId 

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pub struct TryStreamWithId;
Expand description

Yield stream’s items annotated with stream Id (stopping after first error).

Enables Task implementation on any type that implements TryStream.

The stream will be polled for items until it is exhausted or yields an error. Selector will yield all items and the first error, attaching stream’s task Id to each. After that, the Selector will silently drop the stream.

let (tx_1, rx_1) = mpsc::unbounded::<Result<i32, &'static str>>();
let (tx_2, rx_2) = mpsc::unbounded::<Result<i32, &'static str>>();
let mut selector = Selector::<_, TryStreamWithId>::default();
let id_1 = selector.push(rx_1).id().clone();
let id_2 = selector.push(rx_2).id().clone();
tx_1.unbounded_send(Err("error")).unwrap();
assert_eq!(
    selector.next().await.unwrap(),
    (id_1, Err("error")),
);
tx_2.unbounded_send(Ok(1)).unwrap();
assert_eq!(
    selector.next().await.unwrap(),
    (id_2, Ok(1)),
);
drop(tx_2);
assert!(selector.next().await.is_none());
assert!(selector.is_empty());

Trait Implementations§

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impl Clone for TryStreamWithId

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fn clone(&self) -> TryStreamWithId

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Copy for TryStreamWithId

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impl Debug for TryStreamWithId

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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 Default for TryStreamWithId

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fn default() -> TryStreamWithId

Returns the “default value” for a type. Read more

Auto Trait Implementations§

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,

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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,

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

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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

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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<S, T> Task<&mut S> for T
where T: Task<S>, S: ?Sized,

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type Cont = <T as Task<S>>::Cont

Type returned from Self::poll_progress when the task produces some value, but has not finished yet.
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type Break = <T as Task<S>>::Break

Type returned from Self::poll_progress when the task produces its last value.
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type Output = <T as Task<S>>::Output

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fn poll_progress( self: Pin<&mut T>, strategy: &mut &mut S, cx: &mut Context<'_>, ) -> Poll<ControlFlow<<T as Task<&mut S>>::Break, <T as Task<&mut S>>::Cont>>

Polls progress on this task using the given strategy. Read more
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fn transform_cont( task: BorrowedMut<'_, T>, strategy: &mut &mut S, value: <T as Task<&mut S>>::Cont, ) -> Option<<T as Task<&mut S>>::Output>

Transforms Self::Cont value obtained from Self::poll_progress into the final value type Self::Output. Read more
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fn transform_break( task: Removed<T>, strategy: &mut &mut S, value: <T as Task<&mut S>>::Break, ) -> Option<<T as Task<&mut S>>::Output>

Transforms Self::Break value obtained from Self::poll_progress into the final value type Self::Output. Read more
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impl<S, T> Task<Box<S>> for T
where T: Task<S>, S: ?Sized,

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type Cont = <T as Task<S>>::Cont

Type returned from Self::poll_progress when the task produces some value, but has not finished yet.
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type Break = <T as Task<S>>::Break

Type returned from Self::poll_progress when the task produces its last value.
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type Output = <T as Task<S>>::Output

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fn poll_progress( self: Pin<&mut T>, strategy: &mut Box<S>, cx: &mut Context<'_>, ) -> Poll<ControlFlow<<T as Task<Box<S>>>::Break, <T as Task<Box<S>>>::Cont>>

Polls progress on this task using the given strategy. Read more
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fn transform_cont( task: BorrowedMut<'_, T>, strategy: &mut Box<S>, value: <T as Task<Box<S>>>::Cont, ) -> Option<<T as Task<Box<S>>>::Output>

Transforms Self::Cont value obtained from Self::poll_progress into the final value type Self::Output. Read more
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fn transform_break( task: Removed<T>, strategy: &mut Box<S>, value: <T as Task<Box<S>>>::Break, ) -> Option<<T as Task<Box<S>>>::Output>

Transforms Self::Break value obtained from Self::poll_progress into the final value type Self::Output. Read more
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impl<S> Task<TryStreamWithId> for S
where S: TryStream,

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type Cont = <S as TryStream>::Ok

Type returned from Self::poll_progress when the task produces some value, but has not finished yet.
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type Break = Result<(), <S as TryStream>::Error>

Type returned from Self::poll_progress when the task produces its last value.
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type Output = (Id<S>, Result<<S as TryStream>::Ok, <S as TryStream>::Error>)

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fn poll_progress( self: Pin<&mut S>, _: &mut TryStreamWithId, cx: &mut Context<'_>, ) -> Poll<ControlFlow<<S as Task<TryStreamWithId>>::Break, <S as Task<TryStreamWithId>>::Cont>>

Polls progress on this task using the given strategy. Read more
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fn transform_cont( task: BorrowedMut<'_, S>, _: &mut TryStreamWithId, value: <S as Task<TryStreamWithId>>::Cont, ) -> Option<<S as Task<TryStreamWithId>>::Output>

Transforms Self::Cont value obtained from Self::poll_progress into the final value type Self::Output. Read more
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fn transform_break( task: Removed<S>, _: &mut TryStreamWithId, value: <S as Task<TryStreamWithId>>::Break, ) -> Option<<S as Task<TryStreamWithId>>::Output>

Transforms Self::Break value obtained from Self::poll_progress into the final value type Self::Output. Read more
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.