Struct InvariantRecordSlot 

pub struct InvariantRecordSlot {
    pub current: InvariantStateRecord,
    pub previous: Vec<InvariantStateRecord>,
}

The single-key slot holding one invariant’s CURRENT record plus its retention-bounded prior generations (oldest first).

One value per (loop, invariant) key keeps every mutation — rotation on a new current, pruning to the declared window — a single atomic value swap, which every backend (including the distributed CAS path) supports without multi-key transactions. Retention is what keeps the slot bounded: the declared window is mandatory, so unbounded growth is unrepresentable.

Fields

current: InvariantStateRecord

The current record — survives indefinitely, NEVER pruned (R8.1).

previous: Vec<InvariantStateRecord>

Prior generations within the retention window, oldest first.

Implementations

impl InvariantRecordSlot

pub fn encode(&self) -> Result<Vec<u8>, StoreError>

Encode the stable backend-neutral representation.

Errors

Returns StoreError::Serialization when serialization fails.

pub fn decode(bytes: &[u8]) -> Result<Self, StoreError>

Decode a stored representation.

Errors

Returns StoreError::Serialization for malformed bytes.

pub fn rotated(self, record: InvariantStateRecord) -> Self

Rotate record in as the new current, pushing the old current onto the generation list.

pub fn prune(&mut self, older_than: DateTime<Utc>) -> u64

Drop prior generations recorded before older_than, returning how many were removed. The current record is never touched (R8.1).

Trait Implementations

impl Clone for InvariantRecordSlot

fn clone(&self) -> InvariantRecordSlot

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for InvariantRecordSlot

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for InvariantRecordSlot

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for InvariantRecordSlot

impl PartialEq for InvariantRecordSlot

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for InvariantRecordSlot

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for InvariantRecordSlot