re::regmust may be of some help...

use 5.014;
use strict;
use warnings;
use re ();
use List::Util 'sum';

sub re_strictness ($) { sum map length, re::regmust shift }

say re_strictness qr/Dad+y/;  # says 5
say re_strictness qr/D.+/;    # says 1

[download]
package Cow { use Moo; has name => (is => 'lazy', default => sub { 'Mooington' }) } say Cow->new->name

In reply to Re: how to measure strictness of a regex ? by tobyink
in thread how to measure strictness of a regex ? by didess

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