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use strict; use warnings FATAL => 'all';
# A very simple example of how List::Objects::WithUtils can make for prettier
# OO syntax using Moo(se); see List::Objects::Types for more useful bits like
# coercions.
my $widget_id = 0;
{ package Widget;
use Moo;
has id => ( is => 'ro', default => sub { ++$widget_id } );
sub execute {
my $self = shift;
print "Widget ".$self->id." present!\n"
}
}
{ package Machine;
use List::Objects::WithUtils;
use Types::Standard -types;
use Moo;
has widgets => (
is => 'ro',
# You could skip the Types::Standard import and just use an 'array':
default => sub { array_of InstanceOf['Widget'] },
handles => +{
add_widgets => 'push',
list_widgets => 'all',
each_widget => 'visit',
},
);
}
my $machine = Machine->new;
my @widgets = map {; Widget->new } 1 .. 4;
$machine->add_widgets(@widgets);
$machine->each_widget(sub { $_->execute });
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