Enum QueueError 

#[non_exhaustive]
pub enum QueueError {
    AtOrAboveHardCap,
    Backpressured,
    Empty,
    Unsupported,
    Poisoned,
}

Errors originating from queue operations.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

AtOrAboveHardCap

The queue is at or above the hard watermark capacity.

Backpressured

The queue is backpressured but not full; caller may retry later.

Empty

The queue is empty when a pop operation was requested.

Unsupported

The operation is not supported by this queue/backend (e.g., reference peek in concurrent mode).

Poisoned

The queue lock has been poisoned (concurrent mode only).

Trait Implementations

impl Clone for QueueError

fn clone(&self) -> QueueError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for QueueError

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

Formats the value using the given formatter.

impl Display for QueueError

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

Formats the value using the given formatter.

impl Error for QueueError

Available on crate feature std only.

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 PartialEq for QueueError

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for QueueError

impl Eq for QueueError

impl StructuralPartialEq for QueueError