use strict;
use warnings;
use Data::Dumper;

my $obj = bless {this => 1, that => 1};
my $fileStr;

open my $out, '>', \$fileStr;
(my $dumpData = Data::Dumper::Dumper($obj)) =~ s/^\$\w+\s*=\s*(bless\(.*\))/$1/sm;
print $out $dumpData;
close $out;

open my $in, '<', \$fileStr;
my $str = do {local $/; <$in>};
close $in;

my $newObj = eval $str;

$obj->doIt ();
$newObj->doIt ();


sub doIt {
    my ($self) = @_;

    print "$self->{this} + $self->{that} = @{[$self->{this} + $self->{that}]}\n";
}

##</code><code>##

1 + 1 = 2
1 + 1 = 2