[][src]Enum futures::future::Either

pub enum Either<A, B> {
    A(A),
    B(B),
}

Combines two different futures yielding the same item and error types into a single type.

Variants

A(A)

First branch of the type

B(B)

Second branch of the type

Methods

impl<T, A, B> Either<(T, A), (T, B)>[src]

pub fn split(self) -> (T, Either<A, B>)[src]

Splits out the homogeneous type from an either of tuples.

This method is typically useful when combined with the Future::select2 combinator.

Trait Implementations

impl<A, B> Future for Either<A, B> where
    A: Future,
    B: Future<Item = A::Item, Error = A::Error>, 
[src]

type Item = A::Item

The type of value that this future will resolved with if it is successful. Read more

type Error = A::Error

The type of error that this future will resolve with if it fails in a normal fashion. Read more

fn wait(self) -> Result<Self::Item, Self::Error> where
    Self: Sized
[src]

Block the current thread until this future is resolved. Read more

fn map<F, U>(self, f: F) -> Map<Self, F> where
    F: FnOnce(Self::Item) -> U,
    Self: Sized
[src]

Map this future's result to a different type, returning a new future of the resulting type. Read more

fn map_err<F, E>(self, f: F) -> MapErr<Self, F> where
    F: FnOnce(Self::Error) -> E,
    Self: Sized
[src]

Map this future's error to a different error, returning a new future. Read more

fn from_err<E: From<Self::Error>>(self) -> FromErr<Self, E> where
    Self: Sized
[src]

Map this future's error to any error implementing From for this future's Error, returning a new future. Read more

fn then<F, B>(self, f: F) -> Then<Self, B, F> where
    F: FnOnce(Result<Self::Item, Self::Error>) -> B,
    B: IntoFuture,
    Self: Sized
[src]

Chain on a computation for when a future finished, passing the result of the future to the provided closure f. Read more

fn and_then<F, B>(self, f: F) -> AndThen<Self, B, F> where
    F: FnOnce(Self::Item) -> B,
    B: IntoFuture<Error = Self::Error>,
    Self: Sized
[src]

Execute another future after this one has resolved successfully. Read more

fn or_else<F, B>(self, f: F) -> OrElse<Self, B, F> where
    F: FnOnce(Self::Error) -> B,
    B: IntoFuture<Item = Self::Item>,
    Self: Sized
[src]

Execute another future if this one resolves with an error. Read more

fn select<B>(self, other: B) -> Select<Self, B::Future> where
    B: IntoFuture<Item = Self::Item, Error = Self::Error>,
    Self: Sized
[src]

Waits for either one of two futures to complete. Read more

fn select2<B>(self, other: B) -> Select2<Self, B::Future> where
    B: IntoFuture,
    Self: Sized
[src]

Waits for either one of two differently-typed futures to complete. Read more

fn join<B>(self, other: B) -> Join<Self, B::Future> where
    B: IntoFuture<Error = Self::Error>,
    Self: Sized
[src]

Joins the result of two futures, waiting for them both to complete. Read more

fn join3<B, C>(self, b: B, c: C) -> Join3<Self, B::Future, C::Future> where
    B: IntoFuture<Error = Self::Error>,
    C: IntoFuture<Error = Self::Error>,
    Self: Sized
[src]

Same as join, but with more futures.

fn join4<B, C, D>(
    self,
    b: B,
    c: C,
    d: D
) -> Join4<Self, B::Future, C::Future, D::Future> where
    B: IntoFuture<Error = Self::Error>,
    C: IntoFuture<Error = Self::Error>,
    D: IntoFuture<Error = Self::Error>,
    Self: Sized
[src]

Same as join, but with more futures.

fn join5<B, C, D, E>(
    self,
    b: B,
    c: C,
    d: D,
    e: E
) -> Join5<Self, B::Future, C::Future, D::Future, E::Future> where
    B: IntoFuture<Error = Self::Error>,
    C: IntoFuture<Error = Self::Error>,
    D: IntoFuture<Error = Self::Error>,
    E: IntoFuture<Error = Self::Error>,
    Self: Sized
[src]

Same as join, but with more futures.

fn into_stream(self) -> IntoStream<Self> where
    Self: Sized
[src]

Convert this future into a single element stream. Read more

fn flatten(self) -> Flatten<Self> where
    Self::Item: IntoFuture,
    <Self::Item as IntoFuture>::Error: From<Self::Error>,
    Self: Sized
[src]

Flatten the execution of this future when the successful result of this future is itself another future. Read more

fn flatten_stream(self) -> FlattenStream<Self> where
    Self::Item: Stream<Error = Self::Error>,
    Self: Sized
[src]

Flatten the execution of this future when the successful result of this future is a stream. Read more

fn fuse(self) -> Fuse<Self> where
    Self: Sized
[src]

Fuse a future such that poll will never again be called once it has completed. Read more

fn inspect<F>(self, f: F) -> Inspect<Self, F> where
    F: FnOnce(&Self::Item),
    Self: Sized
[src]

Do something with the item of a future, passing it on. Read more

fn catch_unwind(self) -> CatchUnwind<Self> where
    Self: Sized + UnwindSafe
[src]

Catches unwinding panics while polling the future. Read more

fn shared(self) -> Shared<Self> where
    Self: Sized
[src]

Create a cloneable handle to this future where all handles will resolve to the same result. Read more

impl<A: Debug, B: Debug> Debug for Either<A, B>[src]

Auto Trait Implementations

impl<A, B> Send for Either<A, B> where
    A: Send,
    B: Send

impl<A, B> Sync for Either<A, B> where
    A: Sync,
    B: Sync

Blanket Implementations

impl<F> IntoFuture for F where
    F: Future
[src]

type Future = F

The future that this type can be converted into.

type Item = <F as Future>::Item

The item that the future may resolve with.

type Error = <F as Future>::Error

The error that the future may resolve with.

impl<T> From<T> for T[src]

impl<T, U> TryFrom<U> for T where
    U: Into<T>, 
[src]

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> Into<U> for T where
    U: From<T>, 
[src]

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 
[src]

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

impl<T> Borrow<T> for T where
    T: ?Sized
[src]

impl<T> BorrowMut<T> for T where
    T: ?Sized
[src]

impl<T> Any for T where
    T: 'static + ?Sized
[src]