[][src]Enum futures::task::Poll

pub enum Poll<T> {
    Ready(T),
    Pending,
}
🔬 This is a nightly-only experimental API. (futures_api)

futures in libcore are unstable

Indicates whether a value is available or if the current task has been scheduled to receive a wakeup instead.

Variants

Ready(T)
🔬 This is a nightly-only experimental API. (futures_api)

futures in libcore are unstable

Represents that a value is immediately ready.

Pending
🔬 This is a nightly-only experimental API. (futures_api)

futures in libcore are unstable

Represents that a value is not ready yet.

When a function returns Pending, the function must also ensure that the current task is scheduled to be awoken when progress can be made.

Methods

impl<T> Poll<T>
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pub fn map<U, F>(self, f: F) -> Poll<U> where
    F: FnOnce(T) -> U, 
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🔬 This is a nightly-only experimental API. (futures_api)

futures in libcore are unstable

Change the ready value of this Poll with the closure provided

pub fn is_ready(&self) -> bool
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🔬 This is a nightly-only experimental API. (futures_api)

futures in libcore are unstable

Returns whether this is Poll::Ready

pub fn is_pending(&self) -> bool
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🔬 This is a nightly-only experimental API. (futures_api)

futures in libcore are unstable

Returns whether this is Poll::Pending

impl<T, E> Poll<Result<T, E>>
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pub fn map_ok<U, F>(self, f: F) -> Poll<Result<U, E>> where
    F: FnOnce(T) -> U, 
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🔬 This is a nightly-only experimental API. (futures_api)

futures in libcore are unstable

Change the success value of this Poll with the closure provided

pub fn map_err<U, F>(self, f: F) -> Poll<Result<T, U>> where
    F: FnOnce(E) -> U, 
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🔬 This is a nightly-only experimental API. (futures_api)

futures in libcore are unstable

Change the error value of this Poll with the closure provided

Trait Implementations

impl<T> Clone for Poll<T> where
    T: Clone
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fn clone_from(&mut self, source: &Self)
1.0.0
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Performs copy-assignment from source. Read more

impl<T> PartialOrd<Poll<T>> for Poll<T> where
    T: PartialOrd<T>, 
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impl<T> Ord for Poll<T> where
    T: Ord
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fn max(self, other: Self) -> Self
1.21.0
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Compares and returns the maximum of two values. Read more

fn min(self, other: Self) -> Self
1.21.0
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Compares and returns the minimum of two values. Read more

impl<T> Eq for Poll<T> where
    T: Eq
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impl<T> PartialEq<Poll<T>> for Poll<T> where
    T: PartialEq<T>, 
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impl<T> From<T> for Poll<T>
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impl<T, E> Try for Poll<Result<T, E>>
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type Ok = Poll<T>

🔬 This is a nightly-only experimental API. (try_trait)

The type of this value when viewed as successful.

type Error = E

🔬 This is a nightly-only experimental API. (try_trait)

The type of this value when viewed as failed.

impl<T, E> Try for Poll<Option<Result<T, E>>>
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type Ok = Poll<Option<T>>

🔬 This is a nightly-only experimental API. (try_trait)

The type of this value when viewed as successful.

type Error = E

🔬 This is a nightly-only experimental API. (try_trait)

The type of this value when viewed as failed.

impl<T> Copy for Poll<T> where
    T: Copy
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impl<T> Hash for Poll<T> where
    T: Hash
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fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher
1.3.0
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Feeds a slice of this type into the given [Hasher]. Read more

impl<T> Debug for Poll<T> where
    T: Debug
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Auto Trait Implementations

impl<T> Send for Poll<T> where
    T: Send

impl<T> Sync for Poll<T> where
    T: Sync

Blanket Implementations

impl<T> From for T
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impl<T, U> Into for T where
    U: From<T>, 
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impl<T> ToOwned for T where
    T: Clone
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type Owned = T

impl<T, U> TryFrom for T where
    T: From<U>, 
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type Error = !

🔬 This is a nightly-only experimental API. (try_from)

The type returned in the event of a conversion error.

impl<T> Borrow for T where
    T: ?Sized
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impl<T> BorrowMut for T where
    T: ?Sized
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impl<T, U> TryInto for T where
    U: TryFrom<T>, 
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type Error = <U as TryFrom<T>>::Error

🔬 This is a nightly-only experimental API. (try_from)

The type returned in the event of a conversion error.

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