Struct VersionedRecord 

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

A versioned record that stores a history of values.

Implementations

impl<T: Clone> VersionedRecord<T>

pub fn new(initial: T) -> Self

Creates a new record with an initial value.

pub fn update(&mut self, val: T)

Updates the record with a new version.

pub fn current(&self) -> &T

Returns the current (latest) value.

pub fn at_version(&self, n: usize) -> Option<&T>

Returns the value at version n (0-indexed), or None.

pub fn version(&self) -> usize

Returns the version number of the current value.

pub fn has_history(&self) -> bool

Returns true if more than one version exists.