public override void ExecuteInternal(RPNStack rpn, Types dataType)
{
string v1 = rpn.Pop().Token;
if (rpn.Count == 0)
{
ErrorFunction = "EVAL";
ErrorMessage = "Too Few Arguments";
}
foreach (string token in rpn.InfixToRPN(v1).Split(' '))
{
rpn.Push(token);
}
}