(export x 1)
(export (p q) 10).
(export (y z) (@ 2 3).

(export * (@
  l: (= (x y) (+ x y).
  f: (=> (x y) (+ x y z).
).

(export (a b) (@
  a: 101
  b: 102
  c: 103
).

(export * (@
  -a: 201
  _b: 202
).