I'm a trained shaved monkey. Take a look at FormValidator::Simple::ProfileManager::YAML. It allows one to load FVS profiles from YAML. That's a nice compliment to FormValidator::Simples ability to load error messages form a yaml file.
But apparently, some things can't be easy. Using the [REGEX, qr//] validator is one of those things.
With a little tinkering, the answer appears; assuming the various perl YAML parsers can grok it...YAML can at least.
cart/save:
- name
- [ [NOT_BLANK], [LENGTH, 1, 50] ]
cart/delete:
- id
-
-
- REGEX
- !perl/regexp:
REGEXP: '^[a-f0-9]{8}-([a-f0-9]{4}-){3}[a-f0-9]{12}$'
MODIFIERS: i