Yylex(Reader reader) 
{
		this ();
		if (null == reader) {
			throw (new Error("Error: Bad input stream initializer."));
		}
		yy_reader = new java.io.BufferedReader(reader);
}

 Yylex(InputStream instream) 
{
		this ();
		if (null == instream) {
			throw (new Error("Error: Bad input stream initializer."));
		}
		yy_reader = new java.io.BufferedReader(new java.io.InputStreamReader(instream));
}

 int getPos() 
{
     return yychar ;
}

  void setExternalSheet(ExternalSheet es) 
{
    externalSheet = es;
}

  void setNameTable(WorkbookMethods nt) 
{
    nameTable = nt;
}

 public ParseItem yylex() throws FormulaException, IOException 
{
	   
		int yy_lookahead;
		int yy_anchor = YY_NO_ANCHOR;
		int yy_state = yy_state_dtrans[yy_lexical_state];
		int yy_next_state = YY_NO_STATE;
		int yy_last_accept_state = YY_NO_STATE;
		boolean yy_initial = true;
		int yy_this_accept;
		yy_mark_start();
		yy_this_accept = yy_acpt[yy_state];
		if (YY_NOT_ACCEPT != yy_this_accept) {
			yy_last_accept_state = yy_state;
			yy_mark_end();
		}
		while (true) {
			if (yy_initial && yy_at_bol) yy_lookahead = YY_BOL;
			else yy_lookahead = yy_advance();
			yy_next_state = YY_F;
			yy_next_state = yy_nxt[yy_rmap[yy_state]][yy_cmap[yy_lookahead]];
			if (YY_EOF == yy_lookahead && true == yy_initial) {
				return null;
			}
			if (YY_F != yy_next_state) {
				yy_state = yy_next_state;
				yy_initial = false;
				yy_this_accept = yy_acpt[yy_state];
				if (YY_NOT_ACCEPT != yy_this_accept) {
					yy_last_accept_state = yy_state;
					yy_mark_end();
				}
			}
			else {
				if (YY_NO_STATE == yy_last_accept_state) {
					throw (new Error("Lexical Error: Unmatched Input."));
				}
				else {
					yy_anchor = yy_acpt[yy_last_accept_state];
					if (0 != (YY_END & yy_anchor)) {
						yy_move_end();
					}
					yy_to_mark();
					switch (yy_last_accept_state) {
					case 1:
					case -2:
						break;
					case 2:
						{ return new Plus() ;}
					case -3:
						break;
					case 3:
						{ return new Minus() ; }
					case -4:
						break;
					case 4:
						{ return new Multiply() ; }
					case -5:
						break;
					case 5:
						{ return new Divide() ; }
					case -6:
						break;
					case 6:
						{ return new GreaterThan() ; }
					case -7:
						break;
					case 7:
						{ return new Equal() ; }
					case -8:
						break;
					case 8:
						{ return new LessThan() ; }
					case -9:
						break;
					case 9:
						{ return new ArgumentSeparator() ; }
					case -10:
						break;
					case 10:
						{ return new IntegerValue(yytext()) ; }
					case -11:
						break;
					case 11:
						{return new NameRange(yytext(), nameTable); }
					case -12:
						break;
					case 12:
						{ return new RangeSeparator(); }
					case -13:
						break;
					case 13:
						{}
					case -14:
						break;
					case 14:
						{ return new OpenParentheses() ;}
					case -15:
						break;
					case 15:
						{ return new CloseParentheses() ;}
					case -16:
						break;
					case 16:
						{emptyString = true; yybegin(YYSTRING);}
					case -17:
						break;
					case 17:
						{ return new GreaterEqual() ; }
					case -18:
						break;
					case 18:
						{ return new NotEqual() ; }
					case -19:
						break;
					case 19:
						{ return new LessEqual() ; }
					case -20:
						break;
					case 20:
						{ return new CellReference(yytext()) ; }
					case -21:
						break;
					case 21:
						{ return new StringFunction(yytext()) ; }
					case -22:
						break;
					case 22:
						{ return new DoubleValue(yytext()) ; }
					case -23:
						break;
					case 23:
						{ return new ColumnRange(yytext()); }
					case -24:
						break;
					case 24:
						{return new CellReference3d(yytext(),externalSheet) ; }
					case -25:
						break;
					case 25:
						{return new BooleanValue(yytext());}
					case -26:
						break;
					case 26:
						{ return new Area(yytext()) ; }
					case -27:
						break;
					case 27:
						{return new CellReference3d(yytext(),externalSheet) ; }
					case -28:
						break;
					case 28:
						{return new BooleanValue(yytext());}
					case -29:
						break;
					case 29:
						{return new ErrorConstant(yytext());}
					case -30:
						break;
					case 30:
						{ return new ColumnRange3d(yytext(),externalSheet) ; }
					case -31:
						break;
					case 31:
						{ return new Area3d(yytext(),externalSheet) ; }
					case -32:
						break;
					case 32:
						{emptyString = false; return new StringValue(yytext()) ; }
					case -33:
						break;
					case 33:
						{yybegin(YYINITIAL); if (emptyString) return new StringValue("");}
					case -34:
						break;
					case 35:
						{return new NameRange(yytext(), nameTable); }
					case -35:
						break;
					case 36:
						{ return new CellReference(yytext()) ; }
					case -36:
						break;
					case 37:
						{ return new ColumnRange(yytext()); }
					case -37:
						break;
					case 38:
						{ return new ColumnRange3d(yytext(),externalSheet) ; }
					case -38:
						break;
					case 39:
						{emptyString = false; return new StringValue(yytext()) ; }
					case -39:
						break;
					case 41:
						{return new NameRange(yytext(), nameTable); }
					case -40:
						break;
					case 43:
						{return new NameRange(yytext(), nameTable); }
					case -41:
						break;
					case 45:
						{return new NameRange(yytext(), nameTable); }
					case -42:
						break;
					case 89:
						{return new NameRange(yytext(), nameTable); }
					case -43:
						break;
					case 90:
						{return new NameRange(yytext(), nameTable); }
					case -44:
						break;
					case 93:
						{return new NameRange(yytext(), nameTable); }
					case -45:
						break;
					case 94:
						{return new NameRange(yytext(), nameTable); }
					case -46:
						break;
					case 95:
						{return new NameRange(yytext(), nameTable); }
					case -47:
						break;
					case 96:
						{return new NameRange(yytext(), nameTable); }
					case -48:
						break;
					default:
						yy_error(YY_E_INTERNAL,false);
					case -1:
					}
					yy_initial = true;
					yy_state = yy_state_dtrans[yy_lexical_state];
					yy_next_state = YY_NO_STATE;
					yy_last_accept_state = YY_NO_STATE;
					yy_mark_start();
					yy_this_accept = yy_acpt[yy_state];
					if (YY_NOT_ACCEPT != yy_this_accept) {
						yy_last_accept_state = yy_state;
						yy_mark_end();
					}
				}
			}
		}
}