std::future

Struct PollFn

1.64.0 · Source 
pub struct PollFn<F> { /* private fields */ }
Expand description

A Future that wraps a function returning Poll.

This struct is created by poll_fn(). See its documentation for more.

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1.64.0 · Source§

impl<F> Debug for PollFn<F>

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

Formats the value using the given formatter. Read more
1.64.0 · Source§

impl<T, F> Future for PollFn<F>
where F: FnMut(&mut Context<'_>) -> Poll<T>,

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type Output = T

The type of value produced on completion.
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fn poll(self: Pin<&mut PollFn<F>>, cx: &mut Context<'_>) -> Poll<T>

Attempts to resolve the future to a final value, registering the current task for wakeup if the value is not yet available. Read more
1.64.0 · Source§

impl<F> Unpin for PollFn<F>
where F: Unpin,

Auto Trait Implementations§

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impl<F> Freeze for PollFn<F>
where F: Freeze,

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impl<F> RefUnwindSafe for PollFn<F>
where F: RefUnwindSafe,

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impl<F> Send for PollFn<F>
where F: Send,

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impl<F> Sync for PollFn<F>
where F: Sync,

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impl<F> UnwindSafe for PollFn<F>
where F: 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<F> IntoFuture for F
where F: Future,

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type Output = <F as Future>::Output

The output that the future will produce on completion.
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type IntoFuture = F

Which kind of future are we turning this into?
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fn into_future(self) -> <F as IntoFuture>::IntoFuture

Creates a future from a value. 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.