Enum futures::future::Either

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

[−] Expand description

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

Variants

A(A)

[−] Expand description

First branch of the type

B(B)

[−] Expand description

Second branch of the type

Trait Implementations

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

type Item = A::Item

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

type Error = A::Error

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

fn poll(&mut self) -> Poll<A::Item, A::Error>[−]

Query this future to see if its value has become available, registering interest if it is not.

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

Block the current thread until this future is resolved.

fn boxed(self) -> BoxFuture<Self::Item, Self::Error> where Self: Sized + Send + 'static[−]

Convenience function for turning this future into a trait object.

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

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

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

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

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

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

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

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

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[−]

Execute another future after this one has resolved successfully.

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[−]

Execute another future if this one resolves with an error.

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

Waits for either one of two futures to complete.

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

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

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[−]

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[−]

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[−]

Same as join, but with more futures.

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

Convert this future into single element stream.

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

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

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

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

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

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

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

Catches unwinding panics while polling the future.

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

Convert this future into Shared future.