One of the features of Moo (and Moose) is to define attributes as readonly with a default value. So it seems only natural that the authors of Moose and Moo would expect such values to be exported as readonly accessors instead of explicitly using constants.

Update: For example:- 

package MyRole;
use Moo::Role;
use strictures 2;

has 'INDEX_FOO'=> (
    is      => 'ro',
    isa     => 'Int',
    default => 42
);

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In reply to Re: Exporting constants from a Moo role by anonymized user 468275
in thread Exporting constants from a Moo role by 1nickt

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