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Name	Size	Permission	Date
Array.pm	7.98 KB	-r--r--r--	2019-03-16 23:17
Bag.pm	4.68 KB	-r--r--r--	2019-03-16 23:17
Base.pm	5.6 KB	-r--r--r--	2019-03-16 23:17
Bool.pm	1.82 KB	-r--r--r--	2019-03-16 23:17
Custom.pm	3.11 KB	-r--r--r--	2019-03-16 23:17
DeepRef.pm	1.94 KB	-r--r--r--	2019-03-16 23:17
Delta.pm	12.85 KB	-r--r--r--	2019-03-16 23:17
Event.pm	1.32 KB	-r--r--r--	2019-03-16 23:17
EventMeta.pm	1.62 KB	-r--r--r--	2019-03-16 23:17
Float.pm	3.98 KB	-r--r--r--	2019-03-16 23:17
Hash.pm	5.75 KB	-r--r--r--	2019-03-16 23:17
Meta.pm	2.85 KB	-r--r--r--	2019-03-16 23:17
Negatable.pm	2.2 KB	-r--r--r--	2019-03-16 23:17
Number.pm	2.56 KB	-r--r--r--	2019-03-16 23:17
Object.pm	6.08 KB	-r--r--r--	2019-03-16 23:17
OrderedSubset.pm	3.39 KB	-r--r--r--	2019-03-16 23:17
Pattern.pm	1.67 KB	-r--r--r--	2019-03-16 23:17
Ref.pm	1.92 KB	-r--r--r--	2019-03-16 23:17
Regex.pm	1.52 KB	-r--r--r--	2019-03-16 23:17
Scalar.pm	2 KB	-r--r--r--	2019-03-16 23:17
Set.pm	2.91 KB	-r--r--r--	2019-03-16 23:17
String.pm	1.79 KB	-r--r--r--	2019-03-16 23:17
Undef.pm	1.27 KB	-r--r--r--	2019-03-16 23:17
Wildcard.pm	1.13 KB	-r--r--r--	2019-03-16 23:17

Rename

package Test2::Compare::Negatable;
use strict;
use warnings;

our $VERSION = '0.000119';

require overload;
require Test2::Util::HashBase;

sub import {
    my ($pkg, $file, $line) = caller;

my $sub = eval <<"    EOT" or die $@;
package $pkg;
#line $line "$file"
sub { overload->import('!' => 'clone_negate', fallback => 1); Test2::Util::HashBase->import('negate')}
    EOT

$sub->();

no strict 'refs';
    *{"$pkg\::clone_negate"} = \&clone_negate;
    *{"$pkg\::toggle_negate"} = \&toggle_negate;
}

sub clone_negate {
    my $self = shift;
    my $clone = $self->clone;
    $clone->toggle_negate;
    return $clone;
}

sub toggle_negate {
    my $self = shift;
    $self->set_negate($self->negate ? 0 : 1);
}

__END__

=pod

=encoding UTF-8

=head1 NAME

Test2::Compare::Negatable - Poor mans 'role' for compare objects that can be negated.

=head1 DESCRIPTION

Using this package inside an L<Test2::Compare::Base> subclass will overload
C<!$obj> and import C<clone_negate()> and C<toggle_negate()>.

=head1 WHY?

Until perl 5.18 the 'fallback' parameter to L<overload> would not be inherited,
so we cannot use inheritance for the behavior we actually want. This module
works around the problem by emulating the C<use overload> call we want for each
consumer class.

=head1 ATTRIBUTES

=over 4

=item $bool = $obj->negate

=item $obj->set_negate($bool)

=item $attr = NEGATE()

The NEGATE attribute will be added via L<Test2::Util::HashBase>.

=back

=head1 METHODS

=over 4

=item $clone = $obj->clone_negate()

Create a shallow copy of the object, and call C<toggle_negate> on it.

=item $obj->toggle_negate()

Toggle the negate attribute. If the attribute was on it will now be off, if it
was off it will now be on.

=back

=head1 SOURCE

The source code repository for Test2-Suite can be found at
F<https://github.com/Test-More/Test2-Suite/>.

=head1 MAINTAINERS

=over 4

=item Chad Granum E<lt>exodist@cpan.orgE<gt>

=back

=head1 AUTHORS

=over 4

=item Chad Granum E<lt>exodist@cpan.orgE<gt>

=back

=head1 COPYRIGHT

This program is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.

See F<http://dev.perl.org/licenses/>

=cut