EPPlus/FormulaParsing/LexicalAnalysis/Token.cs

/*******************************************************************************
 * You may amend and distribute as you like, but don't remove this header!
 *
 * EPPlus provides server-side generation of Excel 2007/2010 spreadsheets.
 * See http://www.codeplex.com/EPPlus for details.
 *
 * Copyright (C) 2011  Jan Källman
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.

 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  
 * See the GNU Lesser General Public License for more details.
 *
 * The GNU Lesser General Public License can be viewed at http://www.opensource.org/licenses/lgpl-license.php
 * If you unfamiliar with this license or have questions about it, here is an http://www.gnu.org/licenses/gpl-faq.html
 *
 * All code and executables are provided "as is" with no warranty either express or implied. 
 * The author accepts no liability for any damage or loss of business that this product may cause.
 *
 * Code change notes:
 * 
 * Author							Change						Date
 * ******************************************************************************
 * Mats Alm   		                Added       		        2013-03-01 (Prior file history on https://github.com/swmal/ExcelFormulaParser)
 *******************************************************************************/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace OfficeOpenXml.FormulaParsing.LexicalAnalysis
{
    public class Token
    {
        public Token(string token, TokenType tokenType)
        {
            Value = token;
            TokenType = tokenType;
        }

        public string Value { get; internal set; }

        public TokenType TokenType { get; internal set; }

        public void Append(string stringToAppend)
        {
            Value += stringToAppend;
        }

        public bool IsNegated { get; private set; }
        
        public void Negate()
        {

            if (
                TokenType == TokenType.Decimal 
                || 
                TokenType == TokenType.Integer
                ||
                TokenType == TokenType.ExcelAddress)
            {
                IsNegated = true;
            }
        }
        public override string ToString()
        {
            return TokenType.ToString() + ", " + Value;
        }
    }
}