Enum AliasDecision 

#[non_exhaustive]
pub enum AliasDecision {
    None,
    Established(NonZeroU16),
    New(NonZeroU16),
}

What to do with the topic alias for an outgoing PUBLISH (§3.3.2.3.4).

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.

None

No alias: send the full topic name.

Established(NonZeroU16)

Reuse an already-established alias: send an empty topic with the alias.

New(NonZeroU16)

First use of a new alias: send the full topic name with the alias, to be recorded with TopicAliasTable::confirm once the packet is written.

Trait Implementations

impl Clone for AliasDecision

fn clone(&self) -> AliasDecision

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AliasDecision

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

Formats the value using the given formatter.

impl PartialEq for AliasDecision

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

impl Eq for AliasDecision

impl StructuralPartialEq for AliasDecision