> Is there a simple/elegant way in Perl to create an anonymous scalar reference?
does elegant imply as fast as possible?
if not, why simply call a function scref() returning what you need? ¹
the thread you linked to, has already other fast options, you haven't listed yet.
UPDATE:
(¹) just spotted your NULLREF() (was it updated?) going in the same direction, just that your code is wrong, you don't return a ref!
correction:
# Solution 4
sub NULLREF { \ my $x }
f(NULLREF);
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