Enum futures_core::Async

pub enum Async<T> {
    Ready(T),
    Pending,
}

Indicates whether a value is available, or if the current task has been scheduled for later wake-up 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> Async<T>

pub fn map<U, F>(self, f: F) -> Async<U> where
    F: FnOnce(T) -> U, 

Change the success value of this Async with the closure provided

pub fn is_ready(&self) -> bool

Returns whether this is Async::Ready

pub fn is_pending(&self) -> bool

Returns whether this is Async::Pending

Trait Implementations

impl<T: Copy> Copy for Async<T>

impl<T: Clone> Clone for Async<T>

fn clone(&self) -> Async<T>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T: Debug> Debug for Async<T>

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl<T: PartialEq> PartialEq for Async<T>

fn eq(&self, __arg_0: &Async<T>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, __arg_0: &Async<T>) -> bool

This method tests for !=.

impl<T> From<T> for Async<T>

fn from(t: T) -> Async<T>

Performs the conversion.