Yes I know that the tie object and the behavior of the HASH are diferent. But what I tell, is that we need to control the value of the HASH as boolean, as we control the values of keys, and one way that should be is through overload. I'm just pointing how it should work, since now I think that can't control that is a bug in tie.
Graciliano M. P.
"The creativity is the expression of the liberty".