1.36.0[−][src]Enum std::task::Poll
Indicates whether a value is available or if the current task has been scheduled to receive a wakeup instead.
Variants
Ready(T)
Represents that a value is immediately ready.
Pending
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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F: FnOnce(T) -> U,
Changes the ready value of this Poll
with the closure provided.
pub fn is_ready(&self) -> bool
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Returns true
if this is Poll::Ready
pub fn is_pending(&self) -> bool
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Returns true
if 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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F: FnOnce(T) -> U,
Changes 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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F: FnOnce(E) -> U,
Changes the error value of this Poll
with the closure provided.
Trait Implementations
impl<T> From<T> for Poll<T>
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impl<T> PartialOrd<Poll<T>> for Poll<T> where
T: PartialOrd<T>,
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T: PartialOrd<T>,
fn partial_cmp(&self, other: &Poll<T>) -> Option<Ordering>
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fn lt(&self, other: &Poll<T>) -> bool
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fn le(&self, other: &Poll<T>) -> bool
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fn gt(&self, other: &Poll<T>) -> bool
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fn ge(&self, other: &Poll<T>) -> bool
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impl<T> Hash for Poll<T> where
T: Hash,
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T: Hash,
fn hash<__HT>(&self, state: &mut __HT) where
__HT: Hasher,
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__HT: Hasher,
fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
1.3.0[src]
H: Hasher,
Feeds a slice of this type into the given [Hasher
]. Read more
impl<T> Eq for Poll<T> where
T: Eq,
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T: Eq,
impl<T> Clone for Poll<T> where
T: Clone,
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T: Clone,
fn clone(&self) -> Poll<T>
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fn clone_from(&mut self, source: &Self)
1.0.0[src]
Performs copy-assignment from source
. Read more
impl<T, E> Try for Poll<Result<T, E>>
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type Ok = Poll<T>
The type of this value when viewed as successful.
type Error = E
The type of this value when viewed as failed.
fn into_result(
self
) -> Result<<Poll<Result<T, E>> as Try>::Ok, <Poll<Result<T, E>> as Try>::Error>
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self
) -> Result<<Poll<Result<T, E>> as Try>::Ok, <Poll<Result<T, E>> as Try>::Error>
fn from_error(e: <Poll<Result<T, E>> as Try>::Error) -> Poll<Result<T, E>>
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fn from_ok(x: <Poll<Result<T, E>> as Try>::Ok) -> Poll<Result<T, E>>
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impl<T, E> Try for Poll<Option<Result<T, E>>>
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type Ok = Poll<Option<T>>
The type of this value when viewed as successful.
type Error = E
The type of this value when viewed as failed.
fn into_result(
self
) -> Result<<Poll<Option<Result<T, E>>> as Try>::Ok, <Poll<Option<Result<T, E>>> as Try>::Error>
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self
) -> Result<<Poll<Option<Result<T, E>>> as Try>::Ok, <Poll<Option<Result<T, E>>> as Try>::Error>
fn from_error(
e: <Poll<Option<Result<T, E>>> as Try>::Error
) -> Poll<Option<Result<T, E>>>
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e: <Poll<Option<Result<T, E>>> as Try>::Error
) -> Poll<Option<Result<T, E>>>
fn from_ok(
x: <Poll<Option<Result<T, E>>> as Try>::Ok
) -> Poll<Option<Result<T, E>>>
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x: <Poll<Option<Result<T, E>>> as Try>::Ok
) -> Poll<Option<Result<T, E>>>
impl<T> Debug for Poll<T> where
T: Debug,
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T: Debug,
impl<T> Copy for Poll<T> where
T: Copy,
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T: Copy,
impl<T> Ord for Poll<T> where
T: Ord,
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T: Ord,
fn cmp(&self, other: &Poll<T>) -> Ordering
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fn max(self, other: Self) -> Self
1.21.0[src]
Compares and returns the maximum of two values. Read more
fn min(self, other: Self) -> Self
1.21.0[src]
Compares and returns the minimum of two values. Read more
fn clamp(self, min: Self, max: Self) -> Self
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Restrict a value to a certain interval. Read more
impl<T> PartialEq<Poll<T>> for Poll<T> where
T: PartialEq<T>,
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T: PartialEq<T>,
Auto Trait Implementations
Blanket Implementations
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> 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> 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> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
ⓘImportant traits for &'_ mut Ffn borrow_mut(&mut self) -> &mut T
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impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> ToOwned for T where
T: Clone,
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T: Clone,