Struct GenerationalArena 

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

An arena that tracks generations for safe index validation.

When an element is removed, the slot’s generation is incremented. Indices store the generation they were created with, so stale references can be detected.

Implementations

impl<T> GenerationalArena<T>

pub fn new() -> Self

Create a new generational arena.

pub fn with_capacity(cap: usize) -> Self

Create with pre-allocated capacity.

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

Insert a value and get its index.

pub fn get(&self, idx: GenIdx) -> Option<&T>

Get a reference to a value by generational index.

pub fn get_mut(&mut self, idx: GenIdx) -> Option<&mut T>

Get a mutable reference to a value by generational index.

pub fn remove(&mut self, idx: GenIdx) -> Option<T>

Remove a value by generational index.

pub fn contains(&self, idx: GenIdx) -> bool

Check if an index is valid.

pub fn len(&self) -> usize

Number of live entries.

pub fn is_empty(&self) -> bool

Check if empty.

pub fn clear(&mut self)

Clear all entries.

pub fn iter(&self) -> impl Iterator<Item = (GenIdx, &T)>

Iterate over live entries.

Trait Implementations

impl<T: Debug> Debug for GenerationalArena<T>

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

Formats the value using the given formatter.

impl<T> Default for GenerationalArena<T>

fn default() -> Self

Returns the “default value” for a type.