Getting back $object from eval(Dumper($object))

[tphyahoo]

This is a followup to Can I serialize an object and have it remember it's type?. Eventually this has applications for serialization, but for now I just want to be able to dump an object and get it back using eval, which I was told I should be able to do. This is my code that doesn't work.

use warnings;
use strict;
use Data::Dumper;
use Test::More qw(no_plan);

package Foo;
sub new {bless {'a' => 1}, $_[0]};

package main;
my $foo = Foo->new();
my $foo_dumped_evaled;

$foo_dumped_evaled = eval(Dumper($foo));
isa_ok($foo_dumped_evaled,'Foo'); #fails

$foo_dumped_evaled = eval{Dumper($foo)};
isa_ok($foo_dumped_evaled,'Foo'); #fails

$foo_dumped_evaled = bless( {
                 'a' => 1
               }, 'Foo' );
isa_ok($foo_dumped_evaled,'Foo'); #fails

print Dumper($foo);

Output from perl dumperIntro.pl > output.txt 2>&1:

not ok 1 - The object isa Foo
#     Failed test (dumperIntro.pl at line 14)
#     The object isn't defined
not ok 2 - The object isa Foo
#     Failed test (dumperIntro.pl at line 17)
#     The object isn't a reference
ok 3 - The object isa Foo
$VAR1 = bless( {
                 'a' => 1
               }, 'Foo' );
1..3
# Looks like you failed 2 tests of 3.

Any ideas? Thanks for your help!