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#!/usr/bin/perl
use strict;
use warnings;
use Test::More;
use Test::Exception;
{
package Point;
use Moose;
with qw/DoesNegated DoesTranspose/;
has x => ( isa => 'Int', is => 'rw' );
has y => ( isa => 'Int', is => 'rw' );
sub inspect { [$_[0]->x, $_[0]->y] }
no Moose;
}
{
package DoesNegated;
use Moose::Role;
sub negated {
my $self = shift;
$self->new( x => -$self->x, y => -$self->y );
}
no Moose::Role;
}
{
package DoesTranspose;
use Moose::Role;
sub transpose {
my $self = shift;
$self->new( x => $self->y, y => $self->x );
}
no Moose::Role;
}
my $p = Point->new( x => 4, y => 3 );
DoesTranspose->meta->apply( $p, alias => { transpose => 'negated' } );
is_deeply($p->negated->inspect, [3, 4]);
is_deeply($p->transpose->inspect, [3, 4]);
done_testing;
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