Enum TermTree 

pub enum TermTree {
    Leaf(String),
    Node {
        symbol: String,
        children: Vec<TermTree>,
    },
}

A concrete tree-structured term.

Variants

Leaf(String)

A leaf node (constant or variable). Variables are uppercase by convention.

Node

A node with a symbol and children (function application).

Fields

symbol: String

The function symbol.

children: Vec<TermTree>

The children (arguments).

Implementations

impl TermTree

pub fn leaf(s: impl Into<String>) -> Self

Convenience constructor for a leaf node.

pub fn node(symbol: impl Into<String>, children: Vec<TermTree>) -> Self

Convenience constructor for a node.

pub fn is_variable(&self) -> bool

Returns true if this term is a variable (leaf with uppercase first char).

pub fn is_leaf(&self) -> bool

Returns true if this is a leaf node.

pub fn root_symbol(&self) -> Option<&str>

Returns the root symbol, if any.

Trait Implementations

impl Clone for TermTree

fn clone(&self) -> TermTree

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TermTree

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

Formats the value using the given formatter.

impl Display for TermTree

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

Formats the value using the given formatter.

impl Hash for TermTree

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 TermTree

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

impl StructuralPartialEq for TermTree