Enum Registration 

pub enum Registration {
    Unknown,
    NoSliceForProducer,
    Unregistered,
    Registered(Box<SubjectFacts>),
    NotApplicable,
}

Whether the registry recognises this subject.

RFC 09 §5.1 O2 asks an observer to classify by degrading — “unregistered” and “no slice for this producer” are distinct rungs, each weakening the claim rather than discarding the key — and O4 is why a bool cannot be honest here: it renders “we have not loaded a registry yet” identically to “this subject is not registered”. That is the false-verdict failure of RFC 05 §3.1 / RFC 12 §9 applied to a badge — silence is never a verdict, and neither is a not-yet-asked question.

Variants

Unknown

No slice set loaded yet. We have not asked. Render as “—”, never “wild”.

NoSliceForProducer

Slices are loaded, but none declares this producer.

Unregistered

The producer’s slice is loaded and does not declare this subject. “A subject that is not registered does not exist” (RFC 08) — for a conforming producer. On the wire it is simply unregistered traffic.

Registered(Box<SubjectFacts>)

NotApplicable

The key has no registry surface to check: not under the base, unparsed, or on a verbatim plane (the slice carries subjects, not plane keys).

Trait Implementations

impl Clone for Registration

fn clone(&self) -> Registration

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Registration

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

Formats the value using the given formatter.

impl Eq for Registration

impl PartialEq for Registration

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Registration