Even PadWalker and Devel::Caller can't help you - TIEHASH doesn't get passed a reference to the tied variable, so there's no chance of it being able to figure out the variable's name.

Also, the argument this in the Tie::StdHash documentation isn't an identity number; it's a blessed hashref. (It's what most OO Perl code would refer to as $self.)

package Cow { use Moo; has name => (is => 'lazy', default => sub { 'Mooington' }) } say Cow->new->name

In reply to Re^2: Accessing name of tied variable in tie constructor by tobyink
in thread Accessing name of tied variable in tie constructor by djcp3

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