Can data type validation reference a variable for the possible enum values?

[David Karr]

Reading through "Learning Puppet 4", I noticed the ability to define parameter types with pretty specific constraints, like "Enum['foo','bar']", et cetera.

Is there any way for the list of possible enum values to be specified elsewhere and then referenced in the type specification?

[Henrik Lindberg]

Yes, we added type aliases to the language:

type MyModule::MyEnum = Enum['foo', 'bar', 'fee', 'fum']

Which is stored in your module under <root>/types/myenum.pp and should
contain that type alias alone.

Check out R.I's blog post on this topic:
https://www.devco.net/archives/2016/03/18/puppet-4-type-aliases.php

- henrik

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