Struct futures_util::stream::TryUnfold

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pub struct TryUnfold<T, F, Fut> { /* private fields */ }
Expand description

Stream for the try_unfold function.

Trait Implementations§

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impl<T, F, Fut> Debug for TryUnfold<T, F, Fut>where T: Debug, Fut: 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<T, F, Fut, Item> Stream for TryUnfold<T, F, Fut>where F: FnMut(T) -> Fut, Fut: TryFuture<Ok = Option<(Item, T)>>,

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type Item = Result<Item, <Fut as TryFuture>::Error>

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, T, F, Fut> Unpin for TryUnfold<T, F, Fut>where __Origin<'__pin, T, F, Fut>: Unpin,

Auto Trait Implementations§

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impl<T, F, Fut> RefUnwindSafe for TryUnfold<T, F, Fut>where F: RefUnwindSafe, Fut: RefUnwindSafe, T: RefUnwindSafe,

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impl<T, F, Fut> Send for TryUnfold<T, F, Fut>where F: Send, Fut: Send, T: Send,

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impl<T, F, Fut> Sync for TryUnfold<T, F, Fut>where F: Sync, Fut: Sync, T: Sync,

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impl<T, F, Fut> UnwindSafe for TryUnfold<T, F, Fut>where F: UnwindSafe, Fut: UnwindSafe, T: UnwindSafe,

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impl<T> Any for Twhere 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 Twhere 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 Twhere 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> 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 Twhere 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<T, U> TryFrom<U> for Twhere 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 Twhere 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.
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impl<S, T, E> TryStream for Swhere S: Stream<Item = Result<T, E>> + ?Sized,

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type Ok = T

The type of successful values yielded by this future
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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