Enum Node 

pub enum Node {
    Var(u16),
    Lit(u64),
    Add(ExprId, ExprId),
    Mul(ExprId, ExprId),
    Neg(ExprId),
    Recip(ExprId),
    Sqrt(ExprId),
    Sin(ExprId),
    Atan2(ExprId, ExprId),
    Exp2(ExprId),
    Log2(ExprId),
    Select(ExprId, ExprId, ExprId),
}

A node in the expression graph.

9 RISC primitive operations + 2 atom types. Every higher-level math operation decomposes into these primitives via the Scalar impl.

Variants

Var(u16)

Input variable by index.

Lit(u64)

Literal f64 value stored as bits for Hash/Eq.

Add(ExprId, ExprId)

Addition.

Mul(ExprId, ExprId)

Multiplication.

Neg(ExprId)

Negation.

Recip(ExprId)

Reciprocal (1/x).

Sqrt(ExprId)

Square root.

Sin(ExprId)

Sine (only trig primitive).

Atan2(ExprId, ExprId)

Two-argument arctangent atan2(y, x).

Exp2(ExprId)

Base-2 exponential (2^x).

Log2(ExprId)

Base-2 logarithm.

Select(ExprId, ExprId, ExprId)

Branchless select: returns a if cond > 0, else b.

Implementations

impl Node

pub fn lit(v: f64) -> Self

Create a Lit node from an f64 value.

pub fn as_f64(&self) -> Option<f64>

Extract f64 value from a Lit node, or None.

Trait Implementations

impl Clone for Node

fn clone(&self) -> Node

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Node

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

Formats the value using the given formatter.

impl Hash for Node

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 Node

fn eq(&self, other: &Node) -> 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 Node

impl Eq for Node

impl StructuralPartialEq for Node