org.projog.core.predicate.builtin.io

Class Write

java.lang.Object

org.projog.core.predicate.AbstractSingleResultPredicate

org.projog.core.predicate.builtin.io.Write

All Implemented Interfaces:

KnowledgeBaseConsumer, PredicateFactory

public final class Write
extends AbstractSingleResultPredicate

write(X) - writes a term to the output stream.

Writes the term X to the current output stream. write takes account of current operator declarations - thus an infix operator will be printed out between its arguments. write represents lists as a comma separated sequence of elements enclosed in square brackets.

Succeeds only once.

writeln(X) writes the term X to the current output stream, followed by a new line character. writeln(X) can be used as an alternative to write(X), nl.

See Also:

toString(Term)

Method Summary

Modifier and Type	Method and Description
protected boolean	evaluate(Term arg)
static Write	write()
static Write	writeln()

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

Method Detail

write

public static Write write()

writeln

public static Write writeln()

evaluate

protected boolean evaluate(Term arg)

Overrides:

evaluate in class AbstractSingleResultPredicate