package Object;
use Hash::Util::FieldHash;
use overload '%{}' => \&_get_props, fallback => 1;

Hash::Util::FieldHash::fieldhash my %objects;

sub new {
    my $class = shift;
    my $self = bless do { \my($x) }, $class;
    $objects{$self} = {
        prop1 => 'foo',
        prop2 => 'bar',
        blorf => sub {time},
    };
    bless $self, $class;
}

# getters/setters...
sub get_prop1 {
    $objects{shift(@_)}->{prop1};
}
# ... and so on

sub _get_props {
    my $obj = shift;
    $objects{$obj};
    +{
        map {
            $_,
            ref $objects{$obj}->{$_} eq 'CODE'
            ? $objects{$obj}->{$_}->()
            : $objects{$obj}->{$_}
        } keys %{$objects{$obj}}
    }
}
1;
__END__