Struct Version 

pub struct Version(/* private fields */);

Version number for tracking changes using a monotonic counter.

Versions provide a lightweight way to detect changes without expensive content comparison. Each version represents a specific state of a component or the global system.

Guarantees

• Monotonicity: Version numbers always increase
• Uniqueness: No two different states share the same version (within overflow)
• Overflow Safety: Uses wrapping arithmetic to handle u64 overflow gracefully

Example

use hojicha_rendering::differential::Version;

let mut v = Version::default();
assert_eq!(v.value(), 0);

v.increment();
assert_eq!(v.value(), 1);

let next = v.next();
assert_eq!(next.value(), 2);
assert_eq!(v.value(), 1); // original unchanged

Implementations

impl Version

pub fn new(version: u64) -> Self

Create a new version

pub fn value(&self) -> u64

Get the numeric value

pub fn increment(&mut self)

Increment the version using wrapping arithmetic.

Overflow Behavior

Uses wrapping addition to handle u64 overflow gracefully. In practice, overflow is extremely unlikely (would require 2^64 increments at 1 billion increments per second = ~584 years).

pub fn next(&self) -> Self

Create the next version without modifying this one.

Example

use hojicha_rendering::differential::Version;

let v1 = Version::new(5);
let v2 = v1.next();
assert_eq!(v1.value(), 5);
assert_eq!(v2.value(), 6);

Trait Implementations

impl Clone for Version

fn clone(&self) -> Version

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Version

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

Formats the value using the given formatter.

impl Default for Version

fn default() -> Version

Returns the “default value” for a type.

impl Hash for Version

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 Version

fn eq(&self, other: &Version) -> 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 Copy for Version

impl Eq for Version

impl StructuralPartialEq for Version