Enum AtomNode 

pub enum AtomNode<'a> {
    Num(i64),
    Var(Symbol),
    Fun(Symbol, &'a [Atom<'a>]),
    Add(&'a [Atom<'a>]),
    Mul(&'a [Atom<'a>]),
    Pow(Atom<'a>, Atom<'a>),
}

The concrete data stored for each expression node.

Example

use ocas_atom::{AtomArena, AtomNode};
use ocas_core::arena::Arena;

let arena = Arena::new();
let ctx = AtomArena::new(&arena);
let x = ctx.var("x");
match x.node() {
    AtomNode::Var(s) => assert_eq!(s.as_str(), "x"),
    _ => panic!("expected variable"),
}

Variants

Num(i64)

A 64-bit signed integer literal.

Var(Symbol)

A named variable or constant.

Fun(Symbol, &'a [Atom<'a>])

A named function applied to a list of arguments.

Add(&'a [Atom<'a>])

A sum of sub-expressions.

Mul(&'a [Atom<'a>])

A product of sub-expressions.

Pow(Atom<'a>, Atom<'a>)

A power with base and exponent.

Trait Implementations

impl<'a> Clone for AtomNode<'a>

fn clone(&self) -> AtomNode<'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Copy for AtomNode<'a>

impl<'a> Debug for AtomNode<'a>

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

Formats the value using the given formatter.

impl<'a> Eq for AtomNode<'a>

impl<'a> Hash for AtomNode<'a>

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<'a> Ord for AtomNode<'a>

fn cmp(&self, other: &AtomNode<'a>) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl<'a> PartialEq for AtomNode<'a>

fn eq(&self, other: &AtomNode<'a>) -> 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<'a> PartialOrd for AtomNode<'a>

fn partial_cmp(&self, other: &AtomNode<'a>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl<'a> StructuralPartialEq for AtomNode<'a>