$ perl -le'
    use Data::Dumper;
    @x = \( 4, 5, 6, 7 );
    print Dumper \@x;
'
$VAR1 = [
          \4,
          \5,
          \6,
          \7
        ];

$ perl -le'
    use Data::Dumper;
    @x = ( \4, \5, \6, \7 );
    print Dumper \@x;
'
$VAR1 = [
          \4,
          \5,
          \6,
          \7
        ];