org.projog.core.predicate.builtin.construct

Class Arg

java.lang.Object

org.projog.core.predicate.AbstractSingleResultPredicate

org.projog.core.predicate.builtin.construct.Arg

All Implemented Interfaces:

KnowledgeBaseConsumer, PredicateFactory

public final class Arg
extends AbstractSingleResultPredicate

arg(N,T,A) - allows access to an argument of a structure.

arg(N,T,A) provides a mechanism for accessing a specific argument of a structure. arg(N,T,A) succeeds if the Nth argument of the structure T is, or can be assigned to, A.

Constructor Summary

Constructors

Constructor and Description
Arg()

Method Summary

Modifier and Type	Method and Description
protected boolean	evaluate(Term arg1, Term arg2, Term arg3)

Methods inherited from class org.projog.core.predicate.AbstractSingleResultPredicate

evaluate, evaluate, evaluate, evaluate, evaluate, getArithmeticOperators, getFileHandles, getKnowledgeBase, getOperands, getPredicate, getPredicates, getProjogListeners, getSpyPoints, getTermFormatter, init, isRetryable, setKnowledgeBase

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.projog.core.predicate.PredicateFactory

isAlwaysCutOnBacktrack

Constructor Detail

Arg

public Arg()

Method Detail

evaluate

protected boolean evaluate(Term arg1,
                           Term arg2,
                           Term arg3)

Overrides:

evaluate in class AbstractSingleResultPredicate