Struct DeltaTracked 

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

A collection with cursor-based delta tracking.

DeltaTracked<T> wraps a Vec<T> and tracks which items have been consumed via take_delta(). This provides an efficient way to accumulate items over time and periodically extract only the new ones.

The cursor marks the position up to which items have been taken. take_delta() returns items[cursor..] and advances the cursor.

Implementations

impl<T> DeltaTracked<T>

pub fn new(items: Vec<T>) -> Self

Create from existing items with cursor at the end (no pending delta).

pub fn empty() -> Self

Create an empty tracker with cursor at 0.

pub fn push(&mut self, item: T)

Append a single item.

pub fn extend(&mut self, iter: impl IntoIterator<Item = T>)

Append multiple items.

pub fn as_slice(&self) -> &[T]

View all items (including already-consumed ones).

pub fn len(&self) -> usize

Total number of items.

pub fn is_empty(&self) -> bool

Whether the collection is empty.

pub fn into_items(self) -> Vec<T>

Consume and return the inner Vec<T>.

pub fn initial_count(&self) -> usize

Number of items that existed before any push/extend (the initial set). Stable across take_delta() calls.

pub fn has_delta(&self) -> bool

Whether there are items after the cursor.

impl<T: Clone> DeltaTracked<T>

pub fn take_delta(&mut self) -> Vec<T>

Clone and return items added since the last take_delta(), then advance the cursor.

Trait Implementations

impl<T: Clone> Clone for DeltaTracked<T>

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

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for DeltaTracked<T>

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

Formats the value using the given formatter.

impl<T> Default for DeltaTracked<T>

fn default() -> Self

Returns the “default value” for a type.