Either this is a bug, or a weird behavior, but I find it impossible to implement an autotiling that creates columns automatically.

Basically all these lead to same results:

cols(1d)
cols(2d)
rows(1d)
rows(1d)
cols(1:rows(1d)
rows(1:cols(1d)

So all of those create as many rows as there are windows.

But how to create as many columns as there are windows to tile?
So one windows would be 100% screen size.
Two windows would be 50% 50%. Three windows 33% 33% 33%. Etc...