Enum Overflow 

#[non_exhaustive]
pub enum Overflow {
    Reject,
    DropOldest,
    DropLowestPriority,
}

Available on crate feature runtime only.

What a full queue does with a new request.

#[non_exhaustive]: more policies may be added.

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.

Reject

Turn the new request away with ThrottleError::QueueFull.

DropOldest

Evict the oldest waiter to make room for the new one.

DropLowestPriority

Evict the lowest-priority waiter to make room — unless the new request is itself the lowest, in which case it is rejected.

Trait Implementations

impl Clone for Overflow

fn clone(&self) -> Overflow

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Overflow

impl Debug for Overflow

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

Formats the value using the given formatter.

impl Default for Overflow

fn default() -> Overflow

Returns the “default value” for a type.

impl Eq for Overflow

impl PartialEq for Overflow

fn eq(&self, other: &Overflow) -> 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 StructuralPartialEq for Overflow