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package Input::Validator::Constraint::Equal;
use strict;
use warnings;
use base 'Input::Validator::Constraint';
sub is_multiple {1}
sub is_valid {
    my ($self, $values) = @_;
    my $e = shift @$values;
    foreach (@$values) {
        return 0
          unless (!defined $e && !defined $_)
          || (defined $e && defined $_ && $e eq $_);
    }
    return 1;
}
1;
__END__
HideShow 25 lines of Pod
=head1 NAME
Input::Validator::Constraint::Equal - Equal constraint
=head1 SYNOPSIS
    $validator->group('all_are_equal' => [qw/password confirm_password/])
      ->equal;
=head1 DESCRIPTION
Group constraint that validates that all values are the same.
=head1 METHODS
=head2 C<is_valid>
Validates the constraint.
=head1 SEE ALSO
L<Input::Validator>, L<Input::Constraint>
=cut