package My::Types;

use strict;
use warnings;

use MooseX::Types -declare => [qw(Measure MeasureType MeasureUnit some other types)];
use MooseX::Types::Moose qw(Num Int Str);
use MooseX::Types::Structured qw(Dict);

use List::MoreUtils qw(any);

my @measure_types = qw(some data here);
my @measure_units = qw(and here);

subtype MeasureType,
    as Str,
    where   { my $measure_type = $_; any { $measure_type eq lc } @measure_types },
    message { 'Unknown measure type' };
subtype MeasureUnit,
    as Str,
    where   { my $measure_unit = $_; any { $measure_unit eq lc } @measure_units },
    message { 'Unknown measure unit' };
subtype Measure,
    as Dict[
        type   => MeasureType,
        from   => MeasureUnit,
        to     => MeasureUnit,
        amount => Num,
    ],
    message { 'Invalid Measure struct' };

# more subtypes goes here