Hi Monks,
I am struggling to understand how I can assign to an ArrayRef accessor. I am trying to use Moo and Types::Standard for my class attributes. My efforts always produce a extra ArrayRef that is one level deeper than I need.
As far as I can tell, you have to assign a reference to the attribute once it's marked as a 'Ref' but in doing so I end up with an array reference inside an array reference. Perhaps I want a list type but I don't see one.

Code

#!perl

use v5.22;
use warnings;

use Test::Deep;
use Test::More;

BEGIN {
    package MockObj;

    use Moo;
    use Types::Standard qw(ArrayRef Str);
    use namespace::autoclean;

    has 'files' => (
        # `rpw` would be better as, in practice, 
        # this is only used inside the class
        is => 'rw',   
        isa => ArrayRef[Str],
    );
    1;
};

my $mock = MockObj->new;

my @list = ('string one', 'Different string', 'With feeling');
note explain \@list;
$mock->files( \@list );
my @strings = $mock->files;
note explain \@strings;

cmp_deeply(\@strings, bag(@list));

done_testing;

[download]

Result

# [
#   'string one',
#   'Different string',
#   'With feeling'
# ]
# [
#   [
#     'string one',
#     'Different string',
#     'With feeling'
#   ]
# ]
not ok 1
#   Failed test at t/test-case.t line 31.
# Comparing $data as a Bag
# Missing: 'Different string', 'With feeling', 'string one'
# Extra: 1 reference

[download]
Your enlighenment is much appreciated,

In reply to Assigning to a ArrayRef accessor type by tomred

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