Enum Formula 

pub enum Formula {
    Atom(Atomic),
    Neg(usize),
    Conj(usize, usize),
    Disj(usize, usize),
    Impl(usize, usize),
    Univ(usize, String, usize),
    Exist(usize, String, usize),
    Comp(usize, String, usize),
}

Represents a recursive logical formula in the Abstract Syntax Tree (AST).

The structure forms a directed acyclic graph when mapped to FormulaArena.

Variants

Atom(Atomic)

An atomic proposition.

Neg(usize)

Logical negation of an inner formula.

Conj(usize, usize)

Logical conjunction (AND) of two formulas.

Disj(usize, usize)

Logical disjunction (OR) of two formulas.

Impl(usize, usize)

Logical implication (=>) between two formulas.

Univ(usize, String, usize)

Universal quantification (∀) over a variable name in an inner formula.

Exist(usize, String, usize)

Existential quantification (∃) over a variable name in an inner formula.

Comp(usize, String, usize)

Set comprehension ({x | P(x)}), defining a new set based on a predicate.

Trait Implementations

impl Clone for Formula

fn clone(&self) -> Formula

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Formula

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Formula

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Hash for Formula

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 Formula

fn eq(&self, other: &Formula) -> 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 Serialize for Formula

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for Formula

impl StructuralPartialEq for Formula