pub enum Either<L, R> {
    Left {
        value: L,
    },
    Right {
        value: R,
    },
}
Expand description

Combines two different futures that have the same output type.

Construct variants with Either::left and Either::right.

Examples

use actix_utils::future::{ready, Ready, Either};

let res = Either::<_, Ready<usize>>::left(ready(42));
assert_eq!(res.await, 42);

let res = Either::<Ready<usize>, _>::right(ready(43));
assert_eq!(res.await, 43);

Variants§

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Left

Fields

§value: L

A value of type L.

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Right

Fields

§value: R

A value of type R.

Implementations§

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impl<L, R> Either<L, R>

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pub fn left(value: L) -> Either<L, R>

Creates new Either using left variant.

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pub fn right(value: R) -> Either<L, R>

Creates new Either using right variant.

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impl<T> Either<T, T>

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pub fn into_inner(self) -> T

Unwraps into inner value when left and right have a common type.

Trait Implementations§

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impl<L: Clone, R: Clone> Clone for Either<L, R>

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fn clone(&self) -> Either<L, R>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<L: Debug, R: Debug> Debug for Either<L, 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<L, R> Future for Either<L, R>where L: Future, R: Future<Output = L::Output>,

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type Output = <L as Future>::Output

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

Attempt 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, L, R> Unpin for Either<L, R>where __Origin<'__pin, L, R>: Unpin,

Auto Trait Implementations§

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impl<L, R> RefUnwindSafe for Either<L, R>where L: RefUnwindSafe, R: RefUnwindSafe,

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impl<L, R> Send for Either<L, R>where L: Send, R: Send,

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impl<L, R> Sync for Either<L, R>where L: Sync, R: Sync,

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impl<L, R> UnwindSafe for Either<L, R>where L: UnwindSafe, R: 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<F> IntoFuture for Fwhere 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> ToOwned for Twhere T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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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.