That's because in one (or more cases) I do setup-work at BEGIN time, so that any invalid references are caught @compile time. I'm not thinking of 1 particular or specific use case, but several use cases that seem related, but that *could* have different design needs -- so I want to find an orthogonal design that accommodates various usages including ones I may not have thought of yet.

As a simple example of a simple OO usage w/'use'

use Data::Vars [qw(one two three answer)], {one=>1, two=>2, three=>3};

my $p=Data::Vars=>new();

$p->answer=$p->one+$p->two*$p->three;
P "answer=%s", $p->answer;
answer=7
[download]

Will have to think of more situation as I'm getting tired right now...