#region License Information /* HeuristicLab * Copyright (C) 2002-2018 Heuristic and Evolutionary Algorithms Laboratory (HEAL) * * This file is part of HeuristicLab. * * HeuristicLab is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * HeuristicLab 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with HeuristicLab. If not, see . */ #endregion using System.Globalization; namespace HeuristicLab.Problems.DataAnalysis.Symbolic { internal enum TokenSymbol { LPAR, RPAR, SYMB, NUMBER }; internal class Token { public static readonly Token LPAR = Token.Parse("("); public static readonly Token RPAR = Token.Parse(")"); public TokenSymbol Symbol { get; set; } public string StringValue { get; set; } public double DoubleValue { get; set; } public Token() { } public override bool Equals(object obj) { Token other = (obj as Token); if (other == null) return false; if (other.Symbol != Symbol) return false; return other.StringValue == this.StringValue; } public override int GetHashCode() { return Symbol.GetHashCode() & StringValue.GetHashCode(); } public static Token Parse(string strToken) { strToken = strToken.Trim(); Token t = new Token(); t.StringValue = strToken.Trim(); double temp; if (strToken == "") { t = null; } else if (strToken == "(") { t.Symbol = TokenSymbol.LPAR; } else if (strToken == ")") { t.Symbol = TokenSymbol.RPAR; } else if (double.TryParse(strToken, NumberStyles.Float, CultureInfo.InvariantCulture.NumberFormat, out temp)) { t.Symbol = TokenSymbol.NUMBER; t.DoubleValue = double.Parse(strToken, CultureInfo.InvariantCulture.NumberFormat); } else { t.Symbol = TokenSymbol.SYMB; t.StringValue = t.StringValue.ToUpper(); } return t; } } }