1..11. If the lhs of assignment is a bare unparenthesized array or hash, the whole thing is aliased. If it's in parens (alias my (@x) = @y), then the contents will be aliased. This is actually in the documentation under "list assignment to whole aggregate".

I'm not going to do source filtering myself, but the author of Perl6::Binding is of course free to use Data::Alias as "back-end".

UPDATE: On a side note.. I've now already answered a few "would this work?"-questions.. why doesn't anyone just download and try? perl is an empirical science, remember! :-D