Tying package-variable hashes

[premchai21]

Suppose I have a module that ties hashes, say Tie::Hash::Xyzzy. Now I do this:

package main; # (not necessarily explicit)
tie %::, 'Tie::Hash::Xyzzy';

I've verified that when this is done, TIEHASH and DESTROY both get called at the right times, but I cannot figure out how and/or whether it is possible to actually use the package-variable hash as tied (I can't figure out how to tiewise-invoke STORE, FETCH, etc.) and what effect this would have (Tying to the object access to all variables in the package?) -- anymonk know how exactly this works?

[japhy]

Well, Perl doesn't use Perl's data structures for working with the symbol table, it uses perl's. It doesn't convert things like $foo = 1 into ${ $main::{foo} } = 1, because that'd be too damn slow. So I'm afraid you can't really do what you're trying to do, unless you tie() EVERY variable you make into a special monitoring class.

_____________________________________________________
Jeff[japhy]Pinyan: Perl, regex, and perl hacker.
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[premchai21]

Oh, I'm not trying to do anything in particular. I was just wondering whether there was a particular way this worked, and/or a particular reason for it working that way. Your post does however provide some insight. Thank you.