Struct NodeId 

pub struct NodeId(pub u32);

Available on crate feature alloc only.

Index into the TreeArena.

A thin wrapper around u32. The sentinel value NodeId::NONE (backed by u32::MAX) represents an absent or unset node reference.

Tuple Fields

0: u32

Implementations

impl NodeId

pub const NONE: NodeId

Sentinel value indicating “no node”.

pub fn is_none(self) -> bool

Returns true if this is the sentinel NONE value.

pub fn idx(self) -> usize

Convert to usize for indexing into the arena vectors.

Trait Implementations

impl Clone for NodeId

fn clone(&self) -> NodeId

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for NodeId

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

Formats the value using the given formatter.

impl Hash for NodeId

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for NodeId

fn eq(&self, other: &NodeId) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for NodeId

impl Eq for NodeId

impl StructuralPartialEq for NodeId