Enum RegionQueuePushError 

pub enum RegionQueuePushError {
    NbaHasNoQueue,
    PreponedHasNoQueue,
    ObservedHasNoQueue,
}

push’s one typed-error variant (SC-036’s “loud, typed, never silent” posture, applied here to NBA’s non-queue). Never a debug_assert! — that compiles to nothing in release builds, which is exactly the silent-drop this type exists to prevent (see RegionQueues::push’s doc comment).

Variants

NbaHasNoQueue

NBA has no queue of its own — it is crate::sched’s NBA staging log (Task 6), not a RegionQueues member. Pushing Region::Nba here is always a caller bug, never a legitimate no-op.

PreponedHasNoQueue

sva T1 (§1.4, review fix, blocking finding 2). Region::Preponed has no queue of its own either — it is a pure snapshot push (state::snapshot::SnapshotRing), fired as an unconditional inline side effect at time-slot entry (sched::control::Engine::run_until/ step_region), never a region a CompiledProcess is “ready” in. Pushing Region::Preponed here is always a caller bug, the same class NbaHasNoQueue already names for Region::Nba.

ObservedHasNoQueue

sva T2 (§1.4, review fix, blocking finding 2), Observed’s half. Region::Observed has no queue of its own either – a live SVA thread is owned by the automaton engine’s own thread table (a later task), never dispatched through RegionQueues/ProcessTable as a PendingActivation: the Observed-region engine step is reached only through the region-callback mechanism (Engine::push_region_ callback/drain_region_callbacks), never a queued activation. Pushing Region::Observed here is always a caller bug, the same class NbaHasNoQueue/PreponedHasNoQueue already name.

Trait Implementations

impl Clone for RegionQueuePushError

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for RegionQueuePushError

impl Debug for RegionQueuePushError

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

Formats the value using the given formatter.

impl Display for RegionQueuePushError

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

Formats the value using the given formatter.

impl Eq for RegionQueuePushError

impl Error for RegionQueuePushError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl PartialEq for RegionQueuePushError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for RegionQueuePushError