public static void Main(string[] args)
{
var input = args.Length == 0
? "(7*((x+5)*(x+5)))"
: string.Join(" ", args);
Console.WriteLine($"Parsing: {input}");
// Tokenize
var tokens =
from t in new[] { input }
from t1 in t.Split(' ')
from t2 in t1.SplitAndKeep('(')
from t3 in t2.SplitAndKeep(')')
from t4 in t3.SplitAndKeep('+')
from t5 in t4.SplitAndKeep('*')
from t6 in t5.SplitAndKeep('-')
from t7 in t6.SplitAndKeep('^')
select t7;
var tokenArray = tokens.ToArray();
Console.WriteLine($"Input was tokenized to: [{string.Join(", ", tokenArray)}]");
var parser = ExpressionParser.GetExpressionParser();
var result = parser.Run(tokenArray);
// Evaluate expression
switch (result)
{
case Ok <IExpression <double> > ok:
var printer = new PrettyPrint();
var str = printer.Eval(ok.Value);
Console.WriteLine($"Parsed as: {str}");
var toDual = new EvaluateDual();
var dual = toDual.Eval(ok.Value);
Console.WriteLine($"Evaluated to: {dual.Value} for x=1.");
Console.WriteLine($"With derivative: {dual.Deriv} for x=1.");
break;
default:
throw new ArgumentOutOfRangeException(nameof(result));
}
}
