Struct RestoredSubscription 

pub struct RestoredSubscription {
    pub options: SubscriptionOptions,
    pub subscription_id: Option<u32>,
}

The subscription a rejected UNSUBACK reverts to.

Carried by FilterState::Unsubscribing when the filter was Subscribed before the UNSUBSCRIBE, so a non-confirming reason code (rc >= 0x80) can restore it verbatim. Holds the only subscription data an unsubscribing entry needs; an entry that was never subscribed carries none.

Fields

options: SubscriptionOptions

Subscription options to restore (QoS, no-local, retain handling).

subscription_id: Option<u32>

Subscription identifier (§3.8.2.1.2) to restore, if any.

Implementations

impl RestoredSubscription

pub(crate) const fn from_state(state: FilterState) -> Option<Self>

The subscription to restore if an UNSUBSCRIBE of a filter currently in state is rejected. Some only when the filter is confirmed Subscribed, since only then is there a prior subscription to revert to; any other state drops the entry on rejection.

Trait Implementations

impl Clone for RestoredSubscription

fn clone(&self) -> RestoredSubscription

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RestoredSubscription

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

Formats the value using the given formatter.

impl PartialEq for RestoredSubscription

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

impl Eq for RestoredSubscription

impl StructuralPartialEq for RestoredSubscription