/*
* @(#)$Id: SequenceExp.java,v 1.6 2001/06/15 03:24:21 Bear Exp $
*
* Copyright 2001 Sun Microsystems, Inc. All Rights Reserved.
*
* This software is the proprietary information of Sun Microsystems, Inc.
* Use is subject to license terms.
*
*/
package com.sun.msv.grammar;
/**
* A,B. concatenation operator of the regular expression.
*
* @author <a href="mailto:kohsuke.kawaguchi@eng.sun.com">Kohsuke KAWAGUCHI</a>
*/
public final class SequenceExp extends BinaryExp {
SequenceExp( Expression left, Expression right ) { super(left,right,HASHCODE_SEQUENCE); }
public Object visit( ExpressionVisitor visitor ) { return visitor.onSequence(this); }
public Expression visit( ExpressionVisitorExpression visitor ) { return visitor.onSequence(this); }
public boolean visit( ExpressionVisitorBoolean visitor ) { return visitor.onSequence(this); }
public void visit( ExpressionVisitorVoid visitor ) { visitor.onSequence(this); }
protected boolean calcEpsilonReducibility() {
return exp1.isEpsilonReducible() && exp2.isEpsilonReducible();
}
}