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)>>,

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

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

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

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

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

Blanket Implementations

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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,

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for Twhere
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 Twhere
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 Twhere
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 Twhere
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 Swhere
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::TryUnfold

Trait Implementations

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

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

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

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

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

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

impl<'pin, T, F, Fut> Unpin for TryUnfold<T, F, Fut>where
Origin<'__pin, T, F, Fut>: Unpin,

Auto Trait Implementations

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

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

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

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

Blanket Implementations

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

fn type_id(&self) -> TypeId

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

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for Twhere
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 Twhere
U: From<T>,

fn into(self) -> U

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

type Error = Infallible

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

impl<T, U> TryInto<U> for Twhere
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 Swhere
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>>>

Struct futures_util::stream::TryUnfold

Trait Implementations

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

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

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

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

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

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

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

Auto Trait Implementations

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

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

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

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

Blanket Implementations

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

fn type_id(&self) -> TypeId

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

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for Twhere 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 Twhere U: From<T>,

fn into(self) -> U

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

type Error = Infallible

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

impl<T, U> TryInto<U> for Twhere 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 Swhere 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, F, Fut> Debug for TryUnfold<T, F, Fut>where
T: Debug,
Fut: Debug,

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

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

impl<'pin, T, F, Fut> Unpin for TryUnfold<T, F, Fut>where
Origin<'__pin, T, F, Fut>: Unpin,

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

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

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

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

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

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

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

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

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

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

impl<S, T, E> TryStream for Swhere
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>>>