Wikimedia Bugzilla is closed!

Having spent an extended period trying to figure out how to handle a particular situation where a template param can have 

 - A defined value
 - A defined but empty/null value
 - an undefined state

and being seemingly unable to write code that actually follows the desired logic consistently, I'd like to request that as well as being able to write {{{defined|undefined}}} it should be possible to write {{{defined|undefined|empty}}} style constructions. 

This would greatly assist in getting some tiresome code working consistently.