Enum Continuity 

pub enum Continuity {
    First,
    Next,
    Lost {
        count: u64,
    },
    NotNewer {
        last: u64,
    },
}

What EventSeqTracker::observe found when it compared an occurrence’s seq with the last one its channel accepted (ridl §3.1; frame specification §7).

Variants

First

The first occurrence the tracker has seen on this channel. No loss is reported, because a consumer receives only the occurrences raised after its subscription was answered (frame specification §6.2), so the first one may carry any seq.

Next

The seq is one more than the last: nothing was lost.

Lost

The seq is more than one past the last: count occurrences between the two were lost (ridl §3.1: “sequence gaps make loss detectable”).

Fields

count: u64

How many sequence numbers the gap skipped: seq − last − 1.

NotNewer

The seq is not greater than the last: a duplicate or a reordered occurrence. The tracker keeps last. What the caller does with the occurrence is the caller’s decision.

Fields

last: u64

The last seq the channel accepted, unchanged.

Trait Implementations

impl Clone for Continuity

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Continuity

impl Debug for Continuity

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

Formats the value using the given formatter.

impl Eq for Continuity

impl PartialEq for Continuity

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Continuity