Enum Lifetime 

pub enum Lifetime {
    Model,
    Sequence,
    Verify,
    Snapshot,
}

2026-09-30: How long a unit of state lives (LIFECYCLE-DESIGN.md section 3.3).

Variants

Model

2026-09-30: Allocated once with the model (a KV pool; its blocks are per sequence).

Sequence

2026-09-30: Claimed with a sequence’s slot and released with it.

Verify

2026-09-30: Valid from a verify’s snapshot to its commit or rollback.

Snapshot

2026-10-02: Owned by the prefix cache or the scheduler’s ring, in slots of their own.

Implementations

impl Lifetime

pub fn parse(s: &str) -> Option<Self>

2026-09-30: The spelling in the circuit TOML.

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

2026-09-30: The spelling.

pub fn of_kind(kind: StateKind) -> Self

2026-09-30: The one lifetime a state of kind may declare: a recurrent state lives with its sequence, a KV side with the model’s pool. For a recurrent state Verify belongs to the verify holdings (Holding::lifetime), never to its declaration. 2026-10-02: The caches: snapshots live in their owner’s slots, the verify caches across one verify, the verify tables with the model, a prompt-lookup index and a hidden capture with their sequence.

Trait Implementations

impl Clone for Lifetime

fn clone(&self) -> Lifetime

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Lifetime

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

Formats the value using the given formatter.

impl Hash for Lifetime

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 Ord for Lifetime

fn cmp(&self, other: &Lifetime) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for Lifetime

fn eq(&self, other: &Lifetime) -> 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 PartialOrd for Lifetime

fn partial_cmp(&self, other: &Lifetime) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Copy for Lifetime

impl Eq for Lifetime

impl StructuralPartialEq for Lifetime