Enum TryPopError 

pub enum TryPopError {
    Empty,
    Busy,
}

An unbounded lock-free queue and its pop error, from the kovan-queue crate: see its docs. Why SegQueue::try_pop returned no value.

Variants

Empty

The queue holds no value.

Busy

A push has claimed the queue’s next cell and not written its value yet: a value is on its way. A single consumer can register a waker and park; the producer wakes it once its push returns.

Trait Implementations

impl Clone for TryPopError

fn clone(&self) -> TryPopError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for TryPopError

impl Debug for TryPopError

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Display for TryPopError

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Eq for TryPopError

impl Error for TryPopError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

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

Provides type-based access to context intended for error reports.

impl Hash for TryPopError

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for TryPopError

fn eq(&self, other: &TryPopError) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for TryPopError