; (q X) -> q(X)
; (q :x) -> q(x)
; [(q X) (p X)] -> q(X) :- p(X)

(fn clause [c]
  (match c
    (where [:unquote expr] (list? c)) `[:const ,expr]
    (where [name & params] (list? c)) `[:literal ,(tostring name) ,(icollect [_ param (ipairs params)] (clause param))]
    (where [head & tail] (sequence? c)) `[:clause ,(clause head) ,(icollect [_ elem (ipairs tail)] (clause elem))]
    (where v (sym? c)) `[:var ,(tostring v)]
    _ `[:const ,c]))

(fn clauses [...]
  (icollect [_ c (ipairs [...]) :into `(values)] (clause c)))

{: clause : clauses :$ clauses}