Are HLists nothing more than a convoluted way of writing tuples?

Question

I am really interested in finding out where the differences are, and more generally, to identify canonical use cases where HLists cannot be used (or rather, don\'t yield any

Answer 1

There are a lot of things you can't do (well) with tuples:

• write a generic prepend/append function
• write a reverse function
• write a concat function
• ...

You can do all of that with tuples of course, but not in the general case. So using HLists makes your code more DRY.