Re^3: I need Hex conversion, not!

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in reply to Re^2: I need Hex conversion, not!
in thread I need Hex conversion, not!

use strict;
use warnings;

sub hexnum {
    package HexNum;
    use base 'Math::BigInt';
    use overload q[""] => 'as_hex_without_0x';
    __PACKAGE__->new(@_);
}

sub HexNum::as_hex_without_0x {
    substr($_[0]->as_hex, 2);
}

my $var = hexnum 0x2F;
$var += 3;
$var += hexnum 0x02;

print "$var\n";