public decimal Eval(Dictionary <string, object> values)
{
switch (Value)
{
case "*":
return(LeftChild.Eval(values) * RightChild.Eval(values));
case "+":
return(LeftChild.Eval(values) + RightChild.Eval(values));
case "-":
return(LeftChild.Eval(values) - RightChild.Eval(values));
case "/":
return(LeftChild.Eval(values) / RightChild.Eval(values));
case "%":
return(LeftChild.Eval(values) % RightChild.Eval(values));
}
if (LeftChild == null && RightChild == null)
{
if (NodeType == TokenType.LITERAL)
{
return(decimal.Parse(Value));
}
return(Convert.ToDecimal(values[Value]));
}
throw new InvalidOperationException();
}
