Enum Presence 

pub enum Presence {
    Present,
    GapPending,
    Unavailable,
}

Presence of a message’s ordered transcript slot.

Orthogonal to CompletionStatus: a Present message may still be Partial (fragments outstanding), and a GapPending placeholder carries no body at all.

Variants

Present

A real message occupies the slot.

GapPending

A gap was detected; the slot is reserved and a repair is outstanding.

Unavailable

The gap could not be repaired (exhausted, expired, or disclaimed by the sender); the slot is a permanent loss marker.

Trait Implementations

impl Clone for Presence

fn clone(&self) -> Presence

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Presence

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

Formats the value using the given formatter.

impl PartialEq for Presence

fn eq(&self, other: &Presence) -> 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 Presence

impl Eq for Presence

impl StructuralPartialEq for Presence