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 Description
  
  Arg()
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method 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