ClauseMultiSet

A ClauseCollection that drops ordering guarantees in exchange for a slightly cheaper count/get when many clauses can match a single query shape and their relative order does not matter. Used internally as the storage for index buckets of the RETE tree that also backs ClauseQueue; Theory itself always uses ClauseQueue, since Prolog's SLD resolution needs clause order preserved.

See also

Inheritors

Types

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object Companion

Properties

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Only the clauses in this collection that are Directives.

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abstract val rules: Iterable<Rule>

Only the clauses in this collection that are Rules.

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abstract val size: Int

Computes the size of the ClauseCollection

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abstract val unificator: Unificator

The Unificator used to match clauses against each other in this collection.

Functions

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abstract override fun add(clause: Clause): ClauseMultiSet

Gives a freshly produced ClauseMultiSet including the given Clause and the content of this one

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abstract override fun addAll(clauses: Iterable<Clause>): ClauseMultiSet

Gives a freshly produced ClauseMultiSet including all the given Clause and the content of this one

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abstract operator fun contains(element: Clause): Boolean

Tells if the ClauseCollection contains a clause unifying against the given element

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abstract fun containsAll(elements: Iterable<Clause>): Boolean

Tells if, for each of the given elements, the ClauseCollection contains a unifying clause

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abstract fun count(clause: Clause): Long

Gives the number of Clause that would unify over the given clause.

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abstract operator fun get(clause: Clause): Sequence<Clause>

Produces a Sequence of the clauses that would unify over the given Clause.

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abstract fun isEmpty(): Boolean

Tells if the ClauseCollection contains any Clause

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abstract fun isNonEmpty(): Boolean

Tells if the ClauseCollection contains at least one Clause; the negation of isEmpty.

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abstract operator override fun iterator(): Iterator<Clause>

Iterates over all the clauses in this collection, in an order that depends on the concrete implementation (e.g. insertion order for a ClauseQueue, unspecified for a ClauseMultiSet).

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abstract override fun retrieve(clause: Clause): RetrieveResult<out ClauseMultiSet>

Produces a RetrieveResult as a consequence of the attempt at deleting the given Clause from this ClauseMultiSet

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abstract override fun retrieveAll(clause: Clause): RetrieveResult<out ClauseMultiSet>

Produces a RetrieveResult as a consequence of the attempt at deleting all the given Clause from this ClauseMultiSet