public AbstractSyntaxTree SecondPass(AbstractSyntaxTree tree)
{
Simulator.Postfix.Clear();
Simulator.NodesToPolishNotation(tree);
var tokens = InfixToAstParser.ShuntingYardAlgorithm(InfixToAstParser.PostfixToInfix(Simulator.Postfix));
List <string> result = new List <string>();
foreach (var token in tokens)
{
if (Regex.IsMatch(token, @"cos|sin|tan|ctn|log|ex"))
{
string operand = result[result.Count - 1];
if (!Regex.IsMatch(operand.ToString(), @"[0-9]+$") || operand == "cos" || operand == "sin" || operand == "tan" || operand == "ctn" || operand == "log" || operand == "ex")
{
result.Add(token);
continue;
}
result.RemoveAt(result.Count - 1);
switch (token)
{
case "sin":
result.Add(Convert.ToString(Math.Sin(Convert.ToDouble(operand))));
break;
case "cos":
result.Add(Convert.ToString(Math.Cos(Convert.ToDouble(operand))));
break;
case "ctn":
result.Add(Convert.ToString(1 / Math.Tan(Convert.ToDouble(operand))));
break;
case "tan":
result.Add(Convert.ToString(Math.Tan(Convert.ToDouble(operand))));
break;
case "log":
result.Add(Convert.ToString(Math.Log(Convert.ToDouble(operand))));
break;
case "ex":
result.Add(Convert.ToString(Math.Exp(Convert.ToDouble(operand))));
break;
}
}
const string pattern = @"[a-z]+|[0-9]+$";
if (Regex.IsMatch(token.ToString(), pattern))
{
result.Add(token.ToString());
continue;
}
string rightOperand = result[result.Count - 1];
string leftOperand = result[result.Count - 2];
if (!Regex.IsMatch(rightOperand.ToString(), @"[0-9]+$") || !Regex.IsMatch(leftOperand.ToString(), @"[0-9]+$"))
{
result.Add(token);
continue;
}
result.RemoveAt(result.Count - 1);
result.RemoveAt(result.Count - 1);
switch (token)
{
case "+":
result.Add(Convert.ToString(Convert.ToDouble(leftOperand) + Convert.ToDouble(rightOperand)));
break;
case "-":
result.Add(Convert.ToString(Convert.ToDouble(leftOperand) - Convert.ToDouble(rightOperand)));
break;
case "*":
result.Add(Convert.ToString(Convert.ToDouble(leftOperand) * Convert.ToDouble(rightOperand)));
break;
case "/":
result.Add(Convert.ToString(Convert.ToDouble(leftOperand) / Convert.ToDouble(rightOperand)));
break;
case "^":
result.Add(Convert.ToString(Math.Pow(Convert.ToDouble(leftOperand), Convert.ToDouble(rightOperand))));
break;
}
}
return(InfixToAstParser.Parse(InfixToAstParser.PostfixToInfix(result)));
}
public List <string> ThirdPass(AbstractSyntaxTree tree)
{
Simulator.Postfix.Clear();
Simulator.NodesToPolishNotation(tree);
return(InfixToAstParser.PostfixToInfix(Simulator.Postfix).Select(x => Convert.ToString(x)).ToList());
}