Enum Symbol 

pub enum Symbol<B, U, A>
where
    B: Symbolic,
    U: Symbolic,
    A: Symbolic,
{
    Binary(B),
    Unary(U),
    Atom(A),
    Left,
    Right,
}

Variants

Binary(B)

Unary(U)

Atom(A)

Left

Right

Implementations

impl<B, U, A> Symbol<B, U, A>

where B: Symbolic, U: Symbolic, A: Symbolic,

A generic type for when we need to compare over B, U, and A, the types that go into our formulae. Since they implement Ord individually this wrapper type allows comparison between any of the three types assuming the convention that U(nary) operators always have higher precedence than B(inary) operators.

pub fn from_tree(t: &Tree<B, U, A>) -> Self

pub fn from_zipper(z: &Zipper<B, U, A>) -> Option<Self>

Turn the ‘value’ of a zipper into a symbol, or none for a top zipper.

Trait Implementations

impl<B, U, A> Clone for Symbol<B, U, A>

where B: Symbolic + Clone, U: Symbolic + Clone, A: Symbolic + Clone,

fn clone(&self) -> Symbol<B, U, A>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<B, U, A> Debug for Symbol<B, U, A>

where B: Symbolic + Debug, U: Symbolic + Debug, A: Symbolic + Debug,

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

Formats the value using the given formatter.

impl<B, U, A> Display for Symbol<B, U, A>

where B: Symbolic, U: Symbolic, A: Symbolic,

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

Formats the value using the given formatter.

impl<B, U, A> Hash for Symbol<B, U, A>

where B: Symbolic + Hash, U: Symbolic + Hash, A: Symbolic + Hash,

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<B, U, A> Match for Symbol<B, U, A>

where B: Symbolic + Match, U: Symbolic + Match, A: Symbolic + Match,

fn match_str(s: &str) -> Option<Self>

Given a string, return Self if the string matches some element of Self.

fn get_matches(&self) -> Vec<String>

Given an element of Self, return the corresponding strings as a vector.

fn match_prefix(s: &str) -> Option<(usize, Self)>

Match a prefix of a given string against the string matches. Uses the conventional max-munch principle: if the string is "orange" and "o" and "or" are both matches, the method will return "or".

impl<B, U, A> Ord for Symbol<B, U, A>

where B: Symbolic + Ord, U: Symbolic + Ord, A: Symbolic + Ord,

fn cmp(&self, other: &Symbol<B, U, 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<B, U, A> PartialEq for Symbol<B, U, A>

where B: Symbolic + PartialEq, U: Symbolic + PartialEq, A: Symbolic + PartialEq,

fn eq(&self, other: &Symbol<B, U, 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<B, U, A> PartialOrd for Symbol<B, U, A>

where B: Symbolic + PartialOrd, U: Symbolic + PartialOrd, A: Symbolic + PartialOrd,

fn partial_cmp(&self, other: &Symbol<B, U, 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<B, U, A> Copy for Symbol<B, U, A>

where B: Symbolic + Copy, U: Symbolic + Copy, A: Symbolic + Copy,

impl<B, U, A> Eq for Symbol<B, U, A>

where B: Symbolic + Eq, U: Symbolic + Eq, A: Symbolic + Eq,

impl<B, U, A> StructuralPartialEq for Symbol<B, U, A>

where B: Symbolic, U: Symbolic, A: Symbolic,