Equation

sealed class Equation : TermConvertible, Castable<Equation>

A class representing an Equation of logic terms, to be unified;

LHS stands for Left-Hand side and RHS stands for Right-Hand side, of the Equation

Types

Assignment

data class Assignment(lhs: Var, rhs: Term) : Equation

An equation stating Var = Term

Companion

object Companion

Equation companion object

Comparison

data class Comparison(lhs: Term, rhs: Term) : Equation

An equation comparing Terms, possibly different

Contradiction

data class Contradiction(lhs: Term, rhs: Term) : Equation

A contradicting equation, trying to equate non equal Terms

Identity

data class Identity(lhs: Term, rhs: Term) : Equation

An equation of identical Terms

Functions

apply

@JvmOverloads()

fun apply(substitution: Substitution, equalityChecker: (Term, Term) -> Boolean = Term::equals): Equation

Applies given substitution to the Equation left-hand and right-hand sides, returning the new EquationTo modify default equality between Terms, a custom equalityChecker can be provided

open fun <U : Equation> as(): U?

asAssignment

open fun asAssignment(): Equation.Assignment?

asComparison

open fun asComparison(): Equation.Comparison?

asContradiction

open fun asContradiction(): Equation.Contradiction?

asIdentity

open fun asIdentity(): Equation.Identity?

castTo

open fun <U : Equation> castTo(): U

castToAssignment

fun castToAssignment(): Equation.Assignment

castToComparison

fun castToComparison(): Equation.Comparison

castToContradiction

fun castToContradiction(): Equation.Contradiction

castToIdentity

fun castToIdentity(): Equation.Identity

swap

fun swap(): Equation

toPair

open fun toPair(): Pair<Term, Term>

toTerm

open override fun toTerm(): Struct

Properties

isAssignment

open val isAssignment: Boolean

isComparison

open val isComparison: Boolean

isContradiction

open val isContradiction: Boolean

isIdentity

open val isIdentity: Boolean

lhs

open val lhs: Term

The left-hand side of the equation

rhs

open val rhs: Term

The right-hand side of the equation

Inheritors

Equation

Extensions

toAssignmentPair

fun Equation.toAssignmentPair(): Pair<Var, Term>

toSubstitution

fun Equation.toSubstitution(): Substitution.Unifier

Transforms an Equation of a Var with a Term to the corresponding Substitution