Struct NodeIdCell 

pub struct NodeIdCell(/* private fields */);

A node id or none in one word, where Cell<Option<NodeId>> takes two: a layout node keeps three, and the 24 bytes kept it out of jemalloc’s 640-byte size class.

Implementations

impl NodeIdCell

pub const fn new(id: Option<NodeId>) -> Self

A cell holding id.

pub fn get(&self) -> Option<NodeId>

The id the cell holds.

pub fn set(&self, id: Option<NodeId>)

Puts id in the cell.

pub fn replace(&self, id: Option<NodeId>) -> Option<NodeId>

Puts id in the cell and returns the id it held.