private object EvaluateList()
{
ArrayList expressionlist = (ArrayList)this._expressionlist.Clone();
for (int index = 0; index < expressionlist.Count; ++index)
{
if (expressionlist[index] is ExpressionEval.UnaryOp)
{
expressionlist[index] = ExpressionEval.PerformUnaryOp((ExpressionEval.UnaryOp)expressionlist[index], expressionlist[index + 1]);
expressionlist.RemoveAt(index + 1);
}
}
ExpressionEval.BinaryOpQueue binaryOpQueue = new ExpressionEval.BinaryOpQueue(expressionlist);
string str = "";
int index1 = 1;
while (index1 < expressionlist.Count)
{
if (expressionlist[index1] is ExpressionEval.BinaryOp)
{
if (index1 + 1 == expressionlist.Count)
{
throw new ArgumentException("Expression cannot end in a binary operation: [" + expressionlist[index1].ToString() + "]");
}
}
else
{
str += string.Format("\n{0} [?] {1}", expressionlist[index1 - 1] is string?(object)("\"" + expressionlist[index1 - 1] + "\"") : expressionlist[index1 - 1], expressionlist[index1] is string?(object)("\"" + expressionlist[index1] + "\"") : expressionlist[index1]);
--index1;
}
index1 += 2;
}
if (str != "")
{
throw new ArgumentException("Missing binary operator: " + str);
}
for (ExpressionEval.BinaryOp binaryOp = binaryOpQueue.Dequeue(); binaryOp != null; binaryOp = binaryOpQueue.Dequeue())
{
int index2 = expressionlist.IndexOf((object)binaryOp);
expressionlist[index2 - 1] = ExpressionEval.PerformBinaryOp((ExpressionEval.BinaryOp)expressionlist[index2], expressionlist[index2 - 1], expressionlist[index2 + 1]);
expressionlist.RemoveAt(index2);
expressionlist.RemoveAt(index2);
}
return(!(expressionlist[0] is IExpression) ? expressionlist[0] : ((IExpression)expressionlist[0]).Evaluate());
}
