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gnu.prolog.vm
Class UndefinedPredicateCode

java.lang.Object
 extended by gnu.prolog.vm.ExecuteOnlyCode
 extended by gnu.prolog.vm.UndefinedPredicateCode

All Implemented Interfaces:

Installable, PrologCode

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public class UndefinedPredicateCode
extends ExecuteOnlyCode

prolog code

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Field Summary
static AtomTerm	errorAtom
protected CompoundTerm	predicateIndicator predicate indicator for this procedure
protected CompoundTermTag	predicateTag predicate tag
static AtomTerm	procedureAtom
static AtomTerm	unknownAtom
static AtomTerm	warningAtom

Fields inherited from interface gnu.prolog.vm.PrologCode
FAIL, HALT, SUCCESS, SUCCESS_LAST

Constructor Summary
UndefinedPredicateCode(CompoundTermTag predicateTag) construct new instance of undefiend predicate

Method Summary
int	execute(Interpreter interpreter, boolean backtrackMode, Term[] args) this method is used for execution of code

Methods inherited from class gnu.prolog.vm.ExecuteOnlyCode
install, uninstall

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

predicateIndicator

protected CompoundTerm predicateIndicator

predicate indicator for this procedure

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predicateTag

protected CompoundTermTag predicateTag

predicate tag

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unknownAtom

public static final AtomTerm unknownAtom

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errorAtom

public static final AtomTerm errorAtom

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warningAtom

public static final AtomTerm warningAtom

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procedureAtom

public static final AtomTerm procedureAtom

Constructor Detail

UndefinedPredicateCode

public UndefinedPredicateCode(CompoundTermTag predicateTag)

construct new instance of undefiend predicate

Method Detail

execute

public int execute(Interpreter interpreter,
 boolean backtrackMode,
 Term[] args)
 throws PrologException

Description copied from interface: PrologCode

this method is used for execution of code

Specified by:

execute in interface PrologCode

Specified by:

execute in class ExecuteOnlyCode

Parameters:

interpreter - interpreter in which context code is executed

backtrackMode - true if predicate is called on backtracking and false otherwise

args - arguments of code

Returns:

either SUCCESS, SUCCESS_LAST, or FAIL.

Throws:

PrologException

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