Enum core::task::Poll 1.36.0[−][src]
#[must_use = "this `Poll` may be a `Pending` variant, which should be handled"]
pub enum Poll<T> {
Ready(T),
Pending,
}Indicates whether a value is available or if the current task has been scheduled to receive a wakeup instead.
Variants
Represents that a value is immediately ready.
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.
Implementations
impl<T> Poll<T>[src]
impl<T> Poll<T>[src]pub fn map<U, F>(self, f: F) -> Poll<U> where
F: FnOnce(T) -> U, [src]
F: FnOnce(T) -> U,
Changes the ready value of this Poll with the closure provided.
pub const fn is_ready(&self) -> bool1.36.0 (const: 1.49.0)[src]
Returns true if this is Poll::Ready
pub const fn is_pending(&self) -> bool1.36.0 (const: 1.49.0)[src]
Returns true if this is Poll::Pending
impl<T, E> Poll<Result<T, E>>[src]
impl<T, E> Poll<Result<T, E>>[src]impl<T, E> Poll<Option<Result<T, E>>>[src]
impl<T, E> Poll<Option<Result<T, E>>>[src]pub fn map_ok<U, F>(self, f: F) -> Poll<Option<Result<U, E>>> where
F: FnOnce(T) -> U, 1.51.0[src]
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<Option<Result<T, U>>> where
F: FnOnce(E) -> U, 1.51.0[src]
F: FnOnce(E) -> U,
Changes the error value of this Poll with the closure provided.
Trait Implementations
impl<T: Clone> Clone for Poll<T>[src]
impl<T: Clone> Clone for Poll<T>[src]fn clone(&self) -> Poll<T>[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl<T, E, F: From<E>> FromResidual<Result<Infallible, E>> for Poll<Result<T, F>>[src]
impl<T, E, F: From<E>> FromResidual<Result<Infallible, E>> for Poll<Result<T, F>>[src]fn from_residual(x: Result<Infallible, E>) -> Self[src]
impl<T, E, F: From<E>> FromResidual<Result<Infallible, E>> for Poll<Option<Result<T, F>>>[src]
impl<T, E, F: From<E>> FromResidual<Result<Infallible, E>> for Poll<Option<Result<T, F>>>[src]fn from_residual(x: Result<Infallible, E>) -> Self[src]
impl<T: PartialOrd> PartialOrd<Poll<T>> for Poll<T>[src]
impl<T: PartialOrd> PartialOrd<Poll<T>> for Poll<T>[src]impl<T, E> Try for Poll<Result<T, E>>[src]
impl<T, E> Try for Poll<Result<T, E>>[src]impl<T, E> Try for Poll<Option<Result<T, E>>>[src]
impl<T, E> Try for Poll<Option<Result<T, E>>>[src]impl<T, E> Try for Poll<Result<T, E>>[src]
impl<T, E> Try for Poll<Result<T, E>>[src]type Output = Poll<T>
The type of the value produced by ? when not short-circuiting.
type Residual = Result<Infallible, E>
The type of the value passed to FromResidual::from_residual
as part of ? when short-circuiting. Read more
fn from_output(c: Self::Output) -> Self[src]
fn branch(self) -> ControlFlow<Self::Residual, Self::Output>[src]
impl<T, E> Try for Poll<Option<Result<T, E>>>[src]
impl<T, E> Try for Poll<Option<Result<T, E>>>[src]type Output = Poll<Option<T>>
The type of the value produced by ? when not short-circuiting.
type Residual = Result<Infallible, E>
The type of the value passed to FromResidual::from_residual
as part of ? when short-circuiting. Read more
fn from_output(c: Self::Output) -> Self[src]
fn branch(self) -> ControlFlow<Self::Residual, Self::Output>[src]
impl<T: Copy> Copy for Poll<T>[src]
impl<T: Eq> Eq for Poll<T>[src]
impl<T> StructuralEq for Poll<T>[src]
impl<T> StructuralPartialEq for Poll<T>[src]
Auto Trait Implementations
impl<T> Send for Poll<T> where
T: Send,
T: Send,
impl<T> Sync for Poll<T> where
T: Sync,
T: Sync,
impl<T> Unpin for Poll<T> where
T: Unpin,
T: Unpin,