Enum ChildList 

pub enum ChildList {
    Empty,
    One([DagNodeId; 1]),
    Two([DagNodeId; 2]),
    Three([DagNodeId; 3]),
    Four([DagNodeId; 4]),
    Many(Vec<DagNodeId>),
}

A compact child list that stores up to INLINE_CHILDREN IDs inline.

For nodes with more children (e.g. variadic + or * chains), the list spills to a heap-allocated Vec.

Variants

Empty

Zero children (leaf node).

One([DagNodeId; 1])

One child (unary operator).

Two([DagNodeId; 2])

Two children (binary operator — the most common case).

Three([DagNodeId; 3])

Three children.

Four([DagNodeId; 4])

Four children (inline limit).

Many(Vec<DagNodeId>)

More than INLINE_CHILDREN children (heap-allocated).

Implementations

impl ChildList

pub fn from_slice(ids: &[DagNodeId]) -> Self

Creates a child list from a slice of node IDs.

pub const fn len(&self) -> usize

Returns the number of children.

pub const fn is_empty(&self) -> bool

Returns true if there are no children.

pub fn as_slice(&self) -> &[DagNodeId]

Returns the children as a slice.

pub fn iter(&self) -> impl Iterator<Item = DagNodeId> + '_

Returns an iterator over the children.

Trait Implementations

impl<'__de, __Context> BorrowDecode<'__de, __Context> for ChildList

fn borrow_decode<__D: BorrowDecoder<'__de, Context = __Context>>( decoder: &mut __D, ) -> Result<Self, DecodeError>

Attempt to decode this type with the given [BorrowDecode].

impl Clone for ChildList

fn clone(&self) -> ChildList

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ChildList

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

Formats the value using the given formatter.

impl<__Context> Decode<__Context> for ChildList

fn decode<__D: Decoder<Context = __Context>>( decoder: &mut __D, ) -> Result<Self, DecodeError>

Attempt to decode this type with the given [Decode].

impl Encode for ChildList

fn encode<__E: Encoder>(&self, encoder: &mut __E) -> Result<(), EncodeError>

Encode a given type.

impl Hash for ChildList

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 ChildList

fn eq(&self, other: &ChildList) -> 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 Eq for ChildList

impl StructuralPartialEq for ChildList