Struct LWWRegister 

pub struct LWWRegister<T> { /* private fields */ }

A register that resolves conflicts using “last write wins” semantics.

Each write records a timestamp, and on merge the value with the higher timestamp is kept.

Time Injection

Timestamps must be provided by the caller. This makes the type pure and WASM-compatible. Use a logical clock or system time at the call site.

Implementations

impl<T> LWWRegister<T>

pub fn new(value: T, timestamp: u64) -> Self

Create a new register with the given initial value and timestamp.

The timestamp should be provided by the caller (e.g., from system time or a logical clock). This enables WASM compatibility.

pub fn set(&mut self, value: T, timestamp: u64)

Set a new value with the given timestamp.

The timestamp should be greater than or equal to the current timestamp to ensure the new value takes precedence on merge.

pub fn get(&self) -> &T

Get the current value.

pub fn timestamp(&self) -> u64

Get the timestamp of the last write.

Trait Implementations

impl<T: Clone> Clone for LWWRegister<T>

fn clone(&self) -> LWWRegister<T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for LWWRegister<T>

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

Formats the value using the given formatter.

impl<T: Default> Default for LWWRegister<T>

fn default() -> Self

Returns the “default value” for a type.

impl<'de, T> Deserialize<'de> for LWWRegister<T>

where T: Deserialize<'de>,

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<T: Clone> Merge for LWWRegister<T>

fn merge(&mut self, other: &Self)

Merge another register into this one.

The value with the higher timestamp wins. If timestamps are equal, the other value wins (arbitrary but deterministic).

impl<T: PartialEq> PartialEq for LWWRegister<T>

fn eq(&self, other: &LWWRegister<T>) -> 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<T> Serialize for LWWRegister<T>

where T: Serialize,

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl<T> StructuralPartialEq for LWWRegister<T>