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OnDropFuture

ntex::util

Struct OnDropFuture 

Future
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pub struct OnDropFuture<Ft, F>
where
    Ft: Future,
    F: FnOnce(),
{ /* private fields */ }
Expand description

Future wrapper that runs a callback if dropped before completion.

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impl<Ft, F> OnDropFuture<Ft, F>
where Ft: Future, F: FnOnce(),

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pub fn new(fut: Ft, on_drop: F) -> OnDropFuture<Ft, F> ⓘ

Creates a new OnDropFuture that calls on_drop if fut is dropped before it completes.

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impl<Ft, F> Future for OnDropFuture<Ft, F>
where Ft: Future, F: FnOnce(),

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type Output = <Ft as Future>::Output

The type of value produced on completion.
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fn poll( self: Pin<&mut OnDropFuture<Ft, F>>, cx: &mut Context<'_>, ) -> Poll<<OnDropFuture<Ft, F> as Future>::Output>

Attempts to resolve the future to a final value, registering the current task for wakeup if the value is not yet available. Read more
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impl<'__pin, Ft, F> Unpin for OnDropFuture<Ft, F>
where Ft: Future, F: FnOnce(), <PinnedFieldsOfHelperStruct<__Origin<'__pin, Ft, F>> as PinnedFieldsOfHelperTrait>::Actual: Unpin,

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impl<Ft, F> !Freeze for OnDropFuture<Ft, F>

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impl<Ft, F> !RefUnwindSafe for OnDropFuture<Ft, F>

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impl<Ft, F> !Sync for OnDropFuture<Ft, F>

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impl<Ft, F> Send for OnDropFuture<Ft, F>
where Ft: Send, F: Send,

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impl<Ft, F> UnsafeUnpin for OnDropFuture<Ft, F>
where Ft: UnsafeUnpin, F: UnsafeUnpin,

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impl<Ft, F> UnwindSafe for OnDropFuture<Ft, F>
where Ft: UnwindSafe, F: UnwindSafe,

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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<F> OnDropFutureExt for F
where F: Future,

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fn on_drop<F>(self, on_drop: F) -> OnDropFuture<Self, F> ⓘ
where F: FnOnce(),

Wraps this future so that on_drop is called if the future is dropped before it completes. The callback is cancelled once the future completes, whatever its output.
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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<F, T, E> TryFuture for F
where F: Future<Output = 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( self: Pin<&mut F>, cx: &mut Context<'_>, ) -> Poll<<F as Future>::Output>

Poll this TryFuture as if it were a Future. Read more
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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.