Enum ChangeKind 

pub enum ChangeKind {
    Alive,
    AliveFiltered,
    NotAliveDisposed,
    NotAliveUnregistered,
    NotAliveDisposedUnregistered,
}

Kind of a cache entry (DDSI-RTPS §8.2.1.2 / §8.7.2.2.2).

Variants

Alive

Valid sample, accepted by the DDS DataReader filter.

AliveFiltered

Valid sample, discarded by the reader-side filter (TIME_BASED_FILTER / ContentFilteredTopic) — but stays “available” in the NACK path, so the reliable writer does not re-send it (filteredCount counter in ChangeFromWriter).

NotAliveDisposed

dispose marker.

NotAliveUnregistered

unregister marker.

NotAliveDisposedUnregistered

Combined dispose+unregister.

Implementations

impl ChangeKind

pub fn is_relevant(self) -> bool

Spec §8.4.10.5 — is_relevant true for all live kinds; only AliveFiltered is explicitly not relevant for the DDS user-API path (but counts as “received” in the NACK path).

pub fn is_alive_kind(self) -> bool

Spec §8.4.10.5 — is_alive_kind covers Alive + AliveFiltered.

Trait Implementations

impl Clone for ChangeKind

fn clone(&self) -> ChangeKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ChangeKind

impl Debug for ChangeKind

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

Formats the value using the given formatter.

impl Eq for ChangeKind

impl PartialEq for ChangeKind

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ChangeKind