C:\>perl -MO=Deparse -e "$foo = 'bar'";
$foo = 'bar';
-e syntax OK

C:\>perl -MO=Deparse -e "$main::foo = 'bar'";
$foo = 'bar';
-e syntax OK

C:\>perl -MO=Deparse -e "$::foo = 'bar'";
$foo = 'bar';
-e syntax OK