> only scalar refs to be compared for identity, while you want to compare everything else structurally?

yes.

> maybe show examples and counterexamples

see here -> Re: Test scalar refs (not values) in deeply nested structure (workaround)

Cheers Rolf
(addicted to the Perl Programming Language :)
Wikisyntax for the Monastery

In reply to Re^4: Test scalar refs (not values) in deeply nested structure by LanX
in thread Test scalar refs (not values) in deeply nested structure by LanX

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