public override ReturnValue Value(Binding binding)
{
ReturnValue ra = Left.Value(binding);
ReturnValue rb = Right.Value(binding);
if (!ra.Defined() || !rb.Defined())
{
return(new ReturnValue());
}
if (op == "+")
{
return(new ReturnValue(ra.Value() + rb.Value()));
}
if (op == "-")
{
return(new ReturnValue(ra.Value() - rb.Value()));
}
if (op == "*")
{
return(new ReturnValue(ra.Value() * rb.Value()));
}
if (op == "/")
{
return(new ReturnValue(ra.Value() / rb.Value()));
}
if (op == "//")
{
return(new ReturnValue((int)(ra.Value() / rb.Value())));
}
throw new ParserException("Unknown operator: " + op);
}