(.module:
  lux
  (lux (control [monad #+ do]
                ["ex" exception #+ exception:])
       (data [maybe]
             text/format
             (coll (dictionary ["dict" unordered #+ Dict]))))
  (luxc ["&" lang]
        (lang ["ls" synthesis]
              (host [r #+ Expression])))
  [//]
  (/ ["/." common]
     ["/." host]))

(exception: #export (Unknown-Procedure {message Text})
  message)

(def: procedures
  /common.Bundle
  (|> /common.procedures
      (dict.merge /host.procedures)))

(def: #export (translate-procedure translate name args)
  (-> (-> ls.Synthesis (Meta Expression)) Text (List ls.Synthesis)
      (Meta Expression))
  (<| (maybe.default (&.throw Unknown-Procedure (%t name)))
      (do maybe.Monad<Maybe>
        [proc (dict.get name procedures)]
        (wrap (proc translate args)))))