Enum Admission 

pub enum Admission<'b> {
    Proceed(BreakerState, TrialGuard<'b>),
    ShortCircuit,
}

Whether the breaker admits a pull-through attempt right now.

A Proceed carries a TrialGuard that owns any HALF-OPEN trial slot reserved by OriginBreaker::acquire. The guard MUST be kept alive across the (possibly-cancelled) origin fetch and then resolved with TrialGuard::record; if it is dropped without record — the case when the surrounding future is cancelled mid-await — its Drop releases the reserved slot so a stuck breaker can never leak its half-open budget. See TrialGuard.

Variants

Proceed(BreakerState, TrialGuard<'b>)

Proceed with the (retry-looped) origin fetch. Carries the state the breaker was in at admission so the caller knows whether this is a normal CLOSED request or a HALF-OPEN trial (only for logging — record handles the transition either way), plus the TrialGuard that releases the trial slot on cancellation.

ShortCircuit

Short-circuit: the breaker is OPEN (or HALF-OPEN with its trial budget exhausted). The caller must fast-fail this miss WITHOUT running the retry/backoff loop.

Trait Implementations

impl<'b> Debug for Admission<'b>

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

Formats the value using the given formatter.