I assume that "is the same as a('beer', none)" is a typo, ... and that you meant "is the same as a('-beer', 'none')"

And since we are clarifying ... the '-' is part of the key (or the first argument, depending on how you look at it).

bash$ perl -w -Mstrict -MData::Dumper -e \
"print Dumper( { -name => 'foo', -value => 'bar' } );"
[download]

Results:

$VAR1 = {
          '-name' => 'foo',
          '-value' => 'bar'
        };
[download]