It's the $false playing tricks again.

$::{FOO} is the typeglob for FOO in main, and a typeglob can be dereferenced as a hash, and that's exactly what $::{FOO}{CODE} does. It becomes more clear if you add the arrow: $::{FOO}->{CODE}. The reason it works without the arrow is that $::{FOO} is an element of the %:: hash, so it's no different than $foo{bar}{baz}. 

use 5.010;

our %FOO = (CODE => 'hash value');
say $::{FOO}{CODE};

__END__
hash value

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lodin

In reply to Re^4: Removing CODE slot in typeglob / Reversing "use subs ...;" by lodin
in thread Removing CODE slot in typeglob / Reversing "use subs ...;" by lodin

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