Struct ClosureArena 

pub struct ClosureArena { /* private fields */ }

An arena of closures that supports allocation and reuse.

Implementations

impl ClosureArena

pub fn new() -> Self

Create an empty closure arena.

pub fn alloc(&mut self, c: Closure) -> ClosureHandle

Insert a closure and return its handle.

pub fn free(&mut self, h: ClosureHandle)

Release a closure back to the pool.

pub fn get(&self, h: ClosureHandle) -> Option<&Closure>

Get a reference to a closure by handle.

pub fn get_mut(&mut self, h: ClosureHandle) -> Option<&mut Closure>

Get a mutable reference.

pub fn live_count(&self) -> usize

Number of live closures.

pub fn capacity(&self) -> usize

Capacity (live + free slots).

pub fn alloc_count(&self) -> u64

Total allocations.

pub fn free_count(&self) -> u64

Total frees.

pub fn iter(&self) -> impl Iterator<Item = (ClosureHandle, &Closure)>

Iterate over live closures with their handles.

Trait Implementations

impl Default for ClosureArena

fn default() -> Self

Returns the “default value” for a type.