/*  SCCS - @(#)FormalNode.java	1.2 - 02/28/99 - 12:39:12 */

/*
 * Copyright (c) 1997 USC Brain Project. email nsl@java.usc.edu.
*/
//
// FormalNode
////////////////////////////////////////////////////////////

/**
 * FormalNode - Variables with definite type
 */
package pp.src.jbf;

import java.lang.*;

public class FormalNode extends YYtoken{
  public TypeNode type;
  public boolean lvalue;
  public String code0;

  public FormalNode(YYtoken ctype, YYtoken sym) {
    // well, it is kind of convenience to reuse something in YYtokentypes.
    super(ctype.tokentype, sym.text, ctype.lineno, ctype.charno, ctype.charno0);
    lvalue = true; //    setLvalue(true);
    type = (TypeNode) ctype;
    code0=ctype.text+" "+sym.text;
  }
  public FormalNode(FormalNode node) {
    super(node.tokentype, node.text, node.lineno, node.charno, node.charno0);
    lvalue = true; //    setLvalue(true);
    type = ((FormalNode)node).type;
    code0=node.code0;
  }

  /** a token with unknown type */
  public FormalNode(YYtoken node) {
    super(node.tokentype, node.text, node.lineno, node.charno, node.charno0);
    lvalue = true; //    setLvalue(true);
    type = null; // unknown type
    code0="UNKNOWNTYPE"+" "+node.text;
  }
  
  public void setLvalue(boolean b) { lvalue = b;}
  public boolean isLvalue() { return lvalue; }


  /** 
    For hash table created by the system only
    */
  public int hashCode() {
    if (text.length() > 1) {
      return (int)(text.charAt(0)+text.charAt(text.length()));
    }
    else {
      return (int)(text.charAt(0));
    }
  }
  /**
    For hashtable created by the  system only
    */
  public boolean equals(YYtoken comp) {
    if (text.equals(comp.text))
      return true;
    return false;
  }

  public int getDim() {
    if (type==null) {
      return 0;
    } 
    else {
      return type.getDim();
    }
  }
}