ref: fef2165a21c9ed3c7c1e15ee82e5641b3d43c58f 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") }