Struct Literal

pub struct Literal<T = IRTerm> {
    pub positive: bool,
    pub position: Option<SpannedPosition>,
    pub predicate: Predicate,
    pub args: Vec<T>,
}

Fields

positive: bool

True if if this is a positive literal, else it’s a negated literal. Double negations should be collapsed, if any.

position: Option<SpannedPosition>

predicate: Predicate

args: Vec<T>

Implementations

impl Literal

pub fn signature(&self) -> Signature

pub fn variables(&self, include_anonymous: bool) -> HashSet<IRTerm>

pub fn unmangle(self) -> Literal

Unmangles this literal if it represents an operator. Replaces it’s predicate name and removes argument used for matching the operator.

pub fn negated(&self) -> Literal

impl<T> Literal<T>

pub fn with_position(self, position: Option<SpannedPosition>) -> Literal<T>

impl Literal<IRTerm>

pub fn unify(&self, other: &Literal<IRTerm>) -> Option<Substitution<IRTerm>>

Trait Implementations

impl<T: Clone> Clone for Literal<T>

fn clone(&self) -> Literal<T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for Literal<T>

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

Formats the value using the given formatter.

impl Display for Literal

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

Formats the value using the given formatter.

impl Display for Literal<ModusTerm>

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

Formats the value using the given formatter.

impl From<Literal<ModusTerm>> for Expression

fn from(l: Literal<ModusTerm>) -> Self

Converts to this type from the input type.

impl From<Literal<ModusTerm>> for Literal

fn from(modus_literal: Literal<ModusTerm>) -> Self

Converts to this type from the input type.

impl FromStr for Literal

type Err = String

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl FromStr for Literal<ModusTerm>

type Err = String

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl Ground for Literal

fn is_ground(&self) -> bool

impl<T: Hash> Hash for Literal<T>

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<T: PartialEq> PartialEq for Literal<T>

fn eq(&self, other: &Literal<T>) -> 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 RenameWithSubstitution<IRTerm> for Literal<IRTerm>

type Output = Literal

fn rename_with_sub(&self) -> (Self::Output, Substitution<IRTerm>)

impl Substitute<IRTerm> for Literal<IRTerm>

type Output = Literal

fn substitute(&self, s: &Substitution<IRTerm>) -> Self::Output

impl<T: Eq> Eq for Literal<T>

impl<T> StructuralPartialEq for Literal<T>