File Coverage

blib/lib/Data/Object/Undef.pm

Criterion	Covered	Total	%
statement	22	22	100.0
branch	1	4	25.0
condition	2	6	33.3
subroutine	8	8	100.0
pod	0	3	0.0
total	33	43	76.7

# ABSTRACT: Undef Object for Perl 5
package Data::Object::Undef;

use 5.010;

use Scalar::Util 'blessed';
use Data::Object 'deduce_deep', 'detract_deep', 'throw';
use Data::Object::Class 'with';

with 'Data::Object::Role::Undef';

use overload (
    'bool'   => 'data',
    '""'     => 'data',
    '~~'     => 'data',
    fallback => 1,
);

our $VERSION = '0.42'; # VERSION

sub new {
    my $class = shift;
    my $args  = shift;
    my $role  = 'Data::Object::Role::Type';

    $args = $args->data if blessed($args)
        and $args->can('does')
        and $args->does($role);

    throw 'Type Instantiation Error: Not an Undefined value'
        if defined $args;

    return bless \$args, $class;
}

sub data {
    goto &detract;
}

around 'defined' => sub {
    my ($orig, $self, @args) = @_;
    my $result = $self->$orig(@args);
    return scalar deduce_deep $result;
};

sub detract {
    return detract_deep shift;
}

1;

__END__