What your code implies but isn't quite explicit about is that qr() actually gives back a blessed reference to a scalar.
use Scalar::Util qw/blessed reftype/;
my $q = qr//;
print 'ref: ', ref($q), "\n";
print 'blessed: ', blessed($q), "\n";
print 'reftype: ', reftype($q), "\n";
There's some more about this in How can I tell if an object is based on a regex?
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