Struct Versioned 

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

Newtype wrapper that bumps a u64 version counter on every DerefMut access. See module docs for the rationale.

Implementations

impl<T> Versioned<T>

pub fn new(inner: T) -> Self

Wrap a value at version 0.

pub fn version(&self) -> u64

Current version. Cache consumers compare against the version stored alongside the cached output to decide whether to reuse.

pub fn replace(&mut self, value: T) -> T

Replace the inner value AND bump the version (whereas a plain *v = Versioned::new(x) would reset to 0). Use when you need the swap to invalidate downstream caches.

pub fn into_inner(self) -> T

Unwrap to the underlying value, discarding the version.

Trait Implementations

impl<T: Clone> Clone for Versioned<T>

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

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for Versioned<T>

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

Formats the value using the given formatter.

impl<T: Default> Default for Versioned<T>

fn default() -> Versioned<T>

Returns the “default value” for a type.

impl<T> Deref for Versioned<T>

type Target = T

The resulting type after dereferencing.

fn deref(&self) -> &T

Dereferences the value.

impl<T> DerefMut for Versioned<T>

fn deref_mut(&mut self) -> &mut T

Mutably dereferences the value.

impl<T> From<T> for Versioned<T>

fn from(inner: T) -> Self

Converts to this type from the input type.