Struct DagNode 

pub struct DagNode {
    pub kind: SymbolKind,
    pub meta: NodeMetadata,
    pub children: ChildList,
}

A node in the global DAG.

Each DagNode represents a unique sub-expression. It contains:

• What kind of symbol it is (variable, constant, operator, function).
• Metadata (hash, coefficient, arity, flags).
• Children (references to other DAG nodes via DagNodeId).

For constant nodes, the value is stored inline in kind as SymbolKind::Constant(val) — no separate Option<f64> field.

Fields

kind: SymbolKind

The classification of this node.

meta: NodeMetadata

Algebraic metadata (hash, coefficient, flags).

children: ChildList

References to child nodes in the arena.

Implementations

impl DagNode

pub const fn variable(kind: SymbolKind, meta: NodeMetadata) -> Self

Creates a variable leaf node.

pub const fn constant(val: f64, meta: NodeMetadata) -> Self

Creates a numeric constant leaf node.

pub const fn operator( kind: SymbolKind, meta: NodeMetadata, children: ChildList, ) -> Self

Creates an operator node with the given children.

pub const fn is_leaf(&self) -> bool

Returns true if this is a leaf node (no children).

Trait Implementations

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

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 DagNode

fn clone(&self) -> DagNode

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DagNode

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

Formats the value using the given formatter.

impl<__Context> Decode<__Context> for DagNode

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

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

impl Encode for DagNode

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

Encode a given type.