Struct RcExprPool 

pub struct RcExprPool { /* private fields */ }

A reference-counted expression pool that garbage-collects dead entries.

Implementations

impl RcExprPool

pub fn new() -> Self

Create an empty pool.

pub fn alloc(&mut self, hash: u64) -> usize

Allocate a new entry and return its pool index.

pub fn inc_ref(&mut self, idx: usize)

Increment ref count for the entry at idx.

pub fn dec_ref(&mut self, idx: usize) -> bool

Decrement ref count; returns true if still alive.

pub fn collect_garbage(&mut self) -> Vec<usize>

Collect all dead entries and return their indices.

pub fn len(&self) -> usize

Return the total number of entries (including dead).

pub fn is_empty(&self) -> bool

Return whether the pool is empty.

pub fn live_count(&self) -> usize

Return number of live entries.

Trait Implementations

impl Default for RcExprPool

fn default() -> Self

Returns the “default value” for a type.