Dynamic chain for ranges?

[Ola Fosheim Grøstad]

On Monday, 13 June 2022 at 13:22:52 UTC, Steven Schveighoffer 
wrote:
> I would think sort(joiner([arr1, arr2, arr3])) should work, but 
> it's not a random access range.

Yes, I got the error «must satisfy the following constraint: 
isRandomAccessRange!Range`».

It would be relatively easy to make it work as a random access 
range if arr1, arr2, etc were fixed size slices.

Or I guess, use insertion-sort followed by merge-sort.