Struct VersionedChain 

pub struct VersionedChain<T: Clone> { /* private fields */ }

Linked list of (version, value) nodes ordered newest-first. Time-travel reads walk the chain until they find a version <= the query snapshot.

Implementations

impl<T: Clone> VersionedChain<T>

pub fn new() -> Self

pub fn push(&self, value: T, new_version: u64)

Add a new version to the head. new_version must strictly exceed the current head’s version.

pub fn read_at(&self, snapshot_version: u64) -> Option<T>

Read the value visible at snapshot_version. Walks back through history until a node with version <= snapshot is found.

pub fn current(&self) -> Option<(u64, T)>

Current (latest) version and value.

pub fn len(&self) -> usize

Chain length (number of retained versions).

pub fn is_empty(&self) -> bool

Trait Implementations

impl<T: Clone> Default for VersionedChain<T>

fn default() -> Self

Returns the “default value” for a type.