Well, perhaps you can. One could write a piece of XS or
Inline::C that tries to recreate the reference, by peeking
what's at that memory address. But the value might have
been garbage collected, and then you run into trouble.
Abigail
Comment on Re: using references as keys in a hash.
1) When a distinguished but elderly scientist states that something is possible, he is almost certainly right. When he states that something is impossible, he is very probably wrong.
2) The only way of discovering the limits of the possible is to venture a little way past them into the impossible
3) Any sufficiently advanced technology is indistinguishable from magic.
Arthur C. Clarke.