use 5.010;

use strict;
use warnings;

package Foo;

use overload
   '""'   =>  sub {${$_[0]}{SCALAR}},
   '@{}'  =>  sub {${$_[0]}{ARRAY}}
;


sub XX {
    bless {SCALAR => 'one', ARRAY  => ['two', 'three']}, shift;
}


package main;

my $y = Foo->XX;  
say join ", ", $y, @$y;


__END__
one, two, three