I understand that you want to avoid using extension modules, but in this case AttributeHelpers does almost exactly what you want.
package Holder;
use Moose;
use MooseX::AttributeHelpers;
has 'things' => (
metaclass => 'Collection::Array',
is => 'rw',
isa => 'ArrayRef[Str]',
default => sub { [qw/blue green green yellow/] },
auto_deref => 1,
provides => {
'push' => 'add_things'
},
);
package main;
my $holder = Holder->new();
print "My things are:\t\t", join(' ', $holder->things() ), "\n";
$holder->add_things('mango');
print "My things are now:\t", join(' ', $holder->things() ), "\n";
And the output:
My things are: blue green green yellow
My things are now: blue green green yellow mango
Moose doesn't offer lvalue accessors, which I believe is a deliberate choice.
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