public void Create(string item)
{
string param = item.ToLower();
if (tokenFactory.Contains(param))
{
IToken token = tokenFactory.Create(param, AST[AST.Count - 2], AST[AST.Count - 1]);
if (AST.Count < 2)
{
throw new Exception("not enough tokens !");
}
AST.RemoveAt(AST.Count - 2);
AST.RemoveAt(AST.Count - 1);
AST.Add(token);
return;
}
if (treeModifierFactory.Contains(param))
{
ITreeModifier treeModif = treeModifierFactory.Create(param);
AST = treeModif.Modify(AST);
return;
}
//need to handle error with int.tryparse
try {
AST.Add(new Operand(int.Parse(item)));
} catch (Exception) {
Console.Clear();
Console.WriteLine("erreur le charactère rentré n'est pas reconnu comme symbole valide !");
Console.WriteLine("appuyez sur entrée pour recommencer...");
Console.ReadLine();
Console.Clear();
this.AST = new List <IToken>();
}
}
