Enum Priority 

pub enum Priority {
    Critical = 0,
    High = 1,
    Normal = 2,
    Low = 3,
    Background = 4,
}

Five discrete priority levels. Lower numeric value = higher urgency.

Variants

Critical = 0

Highest urgency — always dequeued first.

High = 1

High urgency.

Normal = 2

Default urgency.

Low = 3

Low urgency.

Background = 4

Lowest urgency — most susceptible to starvation without aging.

Implementations

impl Priority

pub const COUNT: usize = 5

Total number of priority levels.

pub fn from_index(idx: u8) -> Option<Self>

Convert a raw u8 index (0–4) into a Priority. Returns None for values outside that range.

pub fn index(self) -> usize

The numeric index of this priority (same as the discriminant).

Trait Implementations

impl Clone for Priority

fn clone(&self) -> Priority

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Priority

impl Debug for Priority

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

Formats the value using the given formatter.

impl Eq for Priority

impl Ord for Priority

fn cmp(&self, other: &Priority) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for Priority

fn eq(&self, other: &Priority) -> 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 PartialOrd for Priority

fn partial_cmp(&self, other: &Priority) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for Priority