001//
002// Generated by JTB 1.1.2
003//
004
005package jtb.cparser.syntaxtree;
006
007import java.util.*;
008
009/**
010 * Represents an optional grammar list, e.g. ( A )*
011 */
012public class NodeListOptional implements NodeListInterface {
013  static final long serialVersionUID = 20050923L;
014
015   public NodeListOptional() {
016      nodes = new Vector<Node>();
017   }
018
019   public NodeListOptional(Node firstNode) {
020      nodes = new Vector<Node>();
021      addNode(firstNode);
022   }
023
024   public void addNode(Node n) {
025      nodes.addElement(n);
026   }
027
028   public Enumeration<Node> elements() { return nodes.elements(); }
029   public Node elementAt(int i)  { return nodes.elementAt(i); }
030   public int size()             { return nodes.size(); }
031   public boolean present()      { return nodes.size() != 0; }
032   public void accept(jtb.cparser.visitor.Visitor v) {
033      v.visit(this);
034   }
035
036   public Vector<Node> nodes;
037}