|
public abstract Interpret ( |
||
| context | ||
| return | void | |
public static double EvaluateExpression(string strExp)
{
Stack <AbstractExpression> stack = new Stack <AbstractExpression>();
string[] tokenList = strExp.Split(' ');
foreach (string s in tokenList)
{
if (IsOperator(s))
{
AbstractExpression rightExpression = stack.Pop();
Console.WriteLine("Pop: " + rightExpression.Interpret());
AbstractExpression leftExpression = stack.Pop();
Console.WriteLine("Pop: " + leftExpression.Interpret());
AbstractExpression op = GetOperatorExpression(s, leftExpression, rightExpression);
Console.WriteLine("Applica operatore: " + s);
double result = op.Interpret();
stack.Push(new NumberExpression(result));
Console.WriteLine("Push result: " + result);
}
else
{
AbstractExpression i = new NumberExpression(s);
Console.WriteLine("Push: " + s);
stack.Push(i);
}
}
AbstractExpression exp = stack.Pop();
return(exp.Interpret());
}
public override void Interpret(Context context)
{
if (context.Position < context.Source.Length)
{
terminalExpression = new TerminalExpression();
terminalExpression.Interpret(context);
context.Position++;
if (context.Result)
{
nonterminalExpression = new NonterminalExpression();
nonterminalExpression.Interpret(context);
}
}
}
