[−][src]Struct either_future::EitherFuture
Methods
impl<LeftFuture, RightFuture> EitherFuture<LeftFuture, RightFuture>
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pub fn left(left_future: LeftFuture) -> Self
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pub fn right(right_future: RightFuture) -> Self
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Methods from Deref<Target = Either<LeftFuture, RightFuture>>
pub fn is_left(&self) -> bool
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Return true if the value is the Left
variant.
use either::*; let values = [Left(1), Right("the right value")]; assert_eq!(values[0].is_left(), true); assert_eq!(values[1].is_left(), false);
pub fn is_right(&self) -> bool
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Return true if the value is the Right
variant.
use either::*; let values = [Left(1), Right("the right value")]; assert_eq!(values[0].is_right(), false); assert_eq!(values[1].is_right(), true);
pub fn as_ref(&self) -> Either<&L, &R>
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Convert &Either<L, R>
to Either<&L, &R>
.
use either::*; let left: Either<_, ()> = Left("some value"); assert_eq!(left.as_ref(), Left(&"some value")); let right: Either<(), _> = Right("some value"); assert_eq!(right.as_ref(), Right(&"some value"));
pub fn as_mut(&mut self) -> Either<&mut L, &mut R>
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Convert &mut Either<L, R>
to Either<&mut L, &mut R>
.
use either::*; fn mutate_left(value: &mut Either<u32, u32>) { if let Some(l) = value.as_mut().left() { *l = 999; } } let mut left = Left(123); let mut right = Right(123); mutate_left(&mut left); mutate_left(&mut right); assert_eq!(left, Left(999)); assert_eq!(right, Right(123));
Trait Implementations
impl<LeftFuture, RightFuture> From<Either<LeftFuture, RightFuture>> for EitherFuture<LeftFuture, RightFuture>
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impl<LeftFuture, RightFuture> DerefMut for EitherFuture<LeftFuture, RightFuture>
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impl<LeftFuture, RightFuture> Deref for EitherFuture<LeftFuture, RightFuture>
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type Target = Either<LeftFuture, RightFuture>
The resulting type after dereferencing.
fn deref(&self) -> &Self::Target
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impl<Left, Right, LeftFuture, RightFuture> Future for EitherFuture<LeftFuture, RightFuture> where
LeftFuture: Future<Output = Left>,
RightFuture: Future<Output = Right>,
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LeftFuture: Future<Output = Left>,
RightFuture: Future<Output = Right>,
type Output = Either<Left, Right>
The type of value produced on completion.
fn poll(self: Pin<&mut Self>, context: &mut Context) -> Poll<Self::Output>
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impl<Left, Right, ErrorType, LeftFuture, RightFuture> Future for EitherFuture<LeftFuture, RightFuture> where
LeftFuture: Future<Item = Left, Error = ErrorType>,
RightFuture: Future<Item = Right, Error = ErrorType>,
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LeftFuture: Future<Item = Left, Error = ErrorType>,
RightFuture: Future<Item = Right, Error = ErrorType>,
type Item = Either<Left, Right>
The type of value that this future will resolved with if it is successful. Read more
type Error = ErrorType
The type of error that this future will resolve with if it fails in a normal fashion. Read more
fn poll(&mut self) -> Result<Async<Self::Item>, Self::Error>
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fn wait(self) -> Result<Self::Item, Self::Error>
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fn map<F, U>(self, f: F) -> Map<Self, F> where
F: FnOnce(Self::Item) -> U,
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F: FnOnce(Self::Item) -> U,
fn map_err<F, E>(self, f: F) -> MapErr<Self, F> where
F: FnOnce(Self::Error) -> E,
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F: FnOnce(Self::Error) -> E,
fn from_err<E>(self) -> FromErr<Self, E> where
E: From<Self::Error>,
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E: From<Self::Error>,
fn then<F, B>(self, f: F) -> Then<Self, B, F> where
B: IntoFuture,
F: FnOnce(Result<Self::Item, Self::Error>) -> B,
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B: IntoFuture,
F: FnOnce(Result<Self::Item, Self::Error>) -> B,
fn and_then<F, B>(self, f: F) -> AndThen<Self, B, F> where
B: IntoFuture<Error = Self::Error>,
F: FnOnce(Self::Item) -> B,
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B: IntoFuture<Error = Self::Error>,
F: FnOnce(Self::Item) -> B,
fn or_else<F, B>(self, f: F) -> OrElse<Self, B, F> where
B: IntoFuture<Item = Self::Item>,
F: FnOnce(Self::Error) -> B,
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B: IntoFuture<Item = Self::Item>,
F: FnOnce(Self::Error) -> B,
fn select<B>(self, other: B) -> Select<Self, <B as IntoFuture>::Future> where
B: IntoFuture<Item = Self::Item, Error = Self::Error>,
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B: IntoFuture<Item = Self::Item, Error = Self::Error>,
fn select2<B>(self, other: B) -> Select2<Self, <B as IntoFuture>::Future> where
B: IntoFuture,
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B: IntoFuture,
fn join<B>(self, other: B) -> Join<Self, <B as IntoFuture>::Future> where
B: IntoFuture<Error = Self::Error>,
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B: IntoFuture<Error = Self::Error>,
fn join3<B, C>(
self,
b: B,
c: C
) -> Join3<Self, <B as IntoFuture>::Future, <C as IntoFuture>::Future> where
B: IntoFuture<Error = Self::Error>,
C: IntoFuture<Error = Self::Error>,
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self,
b: B,
c: C
) -> Join3<Self, <B as IntoFuture>::Future, <C as IntoFuture>::Future> where
B: IntoFuture<Error = Self::Error>,
C: IntoFuture<Error = Self::Error>,
fn join4<B, C, D>(
self,
b: B,
c: C,
d: D
) -> Join4<Self, <B as IntoFuture>::Future, <C as IntoFuture>::Future, <D as IntoFuture>::Future> where
B: IntoFuture<Error = Self::Error>,
C: IntoFuture<Error = Self::Error>,
D: IntoFuture<Error = Self::Error>,
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self,
b: B,
c: C,
d: D
) -> Join4<Self, <B as IntoFuture>::Future, <C as IntoFuture>::Future, <D as IntoFuture>::Future> where
B: IntoFuture<Error = Self::Error>,
C: IntoFuture<Error = Self::Error>,
D: IntoFuture<Error = Self::Error>,
fn join5<B, C, D, E>(
self,
b: B,
c: C,
d: D,
e: E
) -> Join5<Self, <B as IntoFuture>::Future, <C as IntoFuture>::Future, <D as IntoFuture>::Future, <E as IntoFuture>::Future> where
B: IntoFuture<Error = Self::Error>,
C: IntoFuture<Error = Self::Error>,
D: IntoFuture<Error = Self::Error>,
E: IntoFuture<Error = Self::Error>,
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self,
b: B,
c: C,
d: D,
e: E
) -> Join5<Self, <B as IntoFuture>::Future, <C as IntoFuture>::Future, <D as IntoFuture>::Future, <E as IntoFuture>::Future> where
B: IntoFuture<Error = Self::Error>,
C: IntoFuture<Error = Self::Error>,
D: IntoFuture<Error = Self::Error>,
E: IntoFuture<Error = Self::Error>,
fn into_stream(self) -> IntoStream<Self>
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fn flatten(self) -> Flatten<Self> where
Self::Item: IntoFuture,
<Self::Item as IntoFuture>::Error: From<Self::Error>,
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Self::Item: IntoFuture,
<Self::Item as IntoFuture>::Error: From<Self::Error>,
fn flatten_stream(self) -> FlattenStream<Self> where
Self::Item: Stream,
<Self::Item as Stream>::Error == Self::Error,
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Self::Item: Stream,
<Self::Item as Stream>::Error == Self::Error,
fn fuse(self) -> Fuse<Self>
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fn inspect<F>(self, f: F) -> Inspect<Self, F> where
F: FnOnce(&Self::Item),
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F: FnOnce(&Self::Item),
fn catch_unwind(self) -> CatchUnwind<Self> where
Self: UnwindSafe,
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Self: UnwindSafe,
fn shared(self) -> Shared<Self>
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Auto Trait Implementations
impl<LeftFuture, RightFuture> Send for EitherFuture<LeftFuture, RightFuture> where
LeftFuture: Send,
RightFuture: Send,
LeftFuture: Send,
RightFuture: Send,
impl<LeftFuture, RightFuture> Unpin for EitherFuture<LeftFuture, RightFuture> where
LeftFuture: Unpin,
RightFuture: Unpin,
LeftFuture: Unpin,
RightFuture: Unpin,
impl<LeftFuture, RightFuture> Sync for EitherFuture<LeftFuture, RightFuture> where
LeftFuture: Sync,
RightFuture: Sync,
LeftFuture: Sync,
RightFuture: Sync,
impl<LeftFuture, RightFuture> UnwindSafe for EitherFuture<LeftFuture, RightFuture> where
LeftFuture: UnwindSafe,
RightFuture: UnwindSafe,
LeftFuture: UnwindSafe,
RightFuture: UnwindSafe,
impl<LeftFuture, RightFuture> RefUnwindSafe for EitherFuture<LeftFuture, RightFuture> where
LeftFuture: RefUnwindSafe,
RightFuture: RefUnwindSafe,
LeftFuture: RefUnwindSafe,
RightFuture: RefUnwindSafe,
Blanket Implementations
impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> From<T> for T
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impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<F> IntoFuture for F where
F: Future,
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F: Future,