ref: 20cea781b95e1a6c1fa2f6cd2bb6c05ec9a4480d dir: /test/recgeneric.myr/
use std type o(@a::integral) = union `S @a ;; type x(@k) = struct n : o(x(@k)#) ;; const main = { var test : x(int) std.put("built\n") }