Enum futures_util::unfold_state::UnfoldState

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pub(crate) enum UnfoldState<T, R> {
    Value {
        value: T,
    },
    Future {
        future: R,
    },
    Empty,
}
Expand description

UnfoldState used for stream and sink unfolds

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Value

Fields

§value: T
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Future

Fields

§future: R
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Empty

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impl<T, R> UnfoldState<T, R>

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pub(crate) fn project_future(self: Pin<&mut Self>) -> Option<Pin<&mut R>>

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pub(crate) fn take_value(self: Pin<&mut Self>) -> Option<T>

Trait Implementations§

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impl<T: Debug, R: Debug> Debug for UnfoldState<T, R>

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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<'__pin, T, R> Unpin for UnfoldState<T, R>
where PinnedFieldsOf<__Origin<'__pin, T, R>>: Unpin,

Auto Trait Implementations§

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impl<T, R> Freeze for UnfoldState<T, R>
where T: Freeze, R: Freeze,

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impl<T, R> RefUnwindSafe for UnfoldState<T, R>
where T: RefUnwindSafe, R: RefUnwindSafe,

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impl<T, R> Send for UnfoldState<T, R>
where T: Send, R: Send,

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impl<T, R> Sync for UnfoldState<T, R>
where T: Sync, R: Sync,

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impl<T, R> UnwindSafe for UnfoldState<T, R>
where T: UnwindSafe, R: 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,

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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> 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<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.