slidingSplitter + retro

["Nordlöw" via Digitalmars-d-learn]

On Monday, 6 October 2014 at 21:15:10 UTC, monarch_dodra wrote:
> I don't know how your "radial" works. Does the first "back" 
> print "([1, 2, 3], [])" as it should?

I nailed it!

The problem was the definition of opSlice.

I had to add an extra internal state

     lower == upper + 1

to represent SlidingSplitter emptyness.

You're welcome to review again now if you feel like :)

https://github.com/nordlow/justd/blob/master/range_ex.d#L18