On Sun, Nov 22, 2020 at 03:19:19PM +0100, Dr. Jürgen Sauermann wrote:
Floating point and complex numbers are not allowed as to avoid interference with ⎕CT (i.e. how should rounding be performed?).
I share your sentiment regarding the upper bound of the ⎕UCS domain, but throwing a domain error on ⎕UCS1E2 looks like a bug to me too. 1E2 is clearly an integer regardless of the implementation details, and I would be surprised if APL2 didn't accept it. I would expect rounding to be the same as in all the other places that require near-integers, like array indices.
The negative ones are also a bit weird. I wasn't aware of their existence, and they seem to work in surprising ways when passed to various variants of ⎕CR.
-k
