Use cases for alias parameters

[Bruno Medeiros]

I was reading the discussion at 
http://d.puremagic.com/issues/show_bug.cgi?id=1100 , and then it got me 
thinking:

What are the use cases for alias parameters, other than:
* parameters that are templates
* parameters that are variables
?

In particular is there any meaningful use case for:
* parameters that are either variables or types ?


-- 
Bruno Medeiros - MSc in CS/E student
http://www.prowiki.org/wiki4d/wiki.cgi?BrunoMedeiros#D