Enum futures_core::Async
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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>
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pub fn map<U, F>(self, f: F) -> Async<U> where
F: FnOnce(T) -> U,
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F: FnOnce(T) -> U,
Change the success value of this Async
with the closure provided
pub fn is_ready(&self) -> bool
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Returns whether this is Async::Ready
pub fn is_pending(&self) -> bool
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Returns whether this is Async::Pending
Trait Implementations
impl<T: Copy> Copy for Async<T>
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impl<T: Clone> Clone for Async<T>
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fn clone(&self) -> Async<T>
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Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
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Performs copy-assignment from source
. Read more
impl<T: Debug> Debug for Async<T>
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fn fmt(&self, __arg_0: &mut Formatter) -> Result
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Formats the value using the given formatter. Read more
impl<T: PartialEq> PartialEq for Async<T>
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fn eq(&self, __arg_0: &Async<T>) -> bool
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This method tests for self
and other
values to be equal, and is used by ==
. Read more
fn ne(&self, __arg_0: &Async<T>) -> bool
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This method tests for !=
.