But to me as a relatively experienced APLer, it reads very clearly as "return if there are no non-ASCII chars in `w`" (and if there are, the indices of those ch

But to me as a relatively experienced APLer, it reads very clearly as "return if there are no non-ASCII chars in `w`" (and if there are, the indices of those chars will be stored in `i` and the code point of every char will be stored in `c`).