Enum CapHitReason 

pub enum CapHitReason {
    MonotoneShrinking {
        trajectory: SmallVec<[u32; 4]>,
    },
    Plateau {
        delta: u32,
    },
    SuspectedOscillation {
        period: u8,
        trajectory: SmallVec<[u32; 4]>,
    },
    Unknown,
}

Why a fix-point loop hit its safety cap. Distinguishes “raise the cap” cases from non-monotonicity bugs in cap-hit telemetry. Serialized as a tagged snake_case enum for SARIF/JSON consumers.

Variants

MonotoneShrinking

Change-set still decreasing when the cap fired. Safe to raise the cap; the SCC is just larger than budget.

Fields

trajectory: SmallVec<[u32; 4]>

Plateau

Change-set held steady at a non-zero value for ≥2 iterations. Same keys updating back and forth, investigate.

Fields

delta: u32

SuspectedOscillation

Period-2 oscillation detected. Non-monotone; raising the cap will not help. File a bug.

Fields

period: u8

trajectory: SmallVec<[u32; 4]>

Unknown

No trajectory recorded (e.g. cap fired after a single iteration).

Implementations

impl CapHitReason

pub fn classify(deltas: &[u32]) -> CapHitReason

Classify a trajectory of per-iteration change-set sizes (most recent last). Rules: <2 samples → Unknown; a,b,a,b with a≠b → SuspectedOscillation; last two equal non-zero → Plateau; strictly decreasing tail → MonotoneShrinking; otherwise Unknown.

pub fn tag(&self) -> &'static str

Stable snake-case tag for log/diag consumption.

Trait Implementations

impl Clone for CapHitReason

fn clone(&self) -> CapHitReason

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CapHitReason

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

Formats the value using the given formatter.

impl Default for CapHitReason

fn default() -> CapHitReason

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for CapHitReason

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Hash for CapHitReason

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for CapHitReason

fn eq(&self, other: &CapHitReason) -> 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 Serialize for CapHitReason

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for CapHitReason

impl StructuralPartialEq for CapHitReason