(.module:
  [library
   [lux "*"
    ["[0]" time]
    [abstract
     [monad {"+" do}]]
    [control
     ["<>" parser
      ["<[0]>" text {"+" Parser}]]]
    [data
     [text
      ["%" format]]]
    [math
     [number
      ["n" nat]]]]]
  ["[0]" // "_"
   ["[1]" date]])

(type: .public Time
  time.Time)

(def: .public (format value)
  (%.Format Time)
  (let [(^slots [time.#hour time.#minute time.#second]) (time.clock value)]
    (%.format (//.pad #hour)
              (//.pad #minute)
              (//.pad #second))))

(def: .public parser
  (<text>.Parser Time)
  (do <>.monad
    [hour (<>.codec n.decimal (<text>.exactly 2 <text>.decimal))
     minute (<>.codec n.decimal (<text>.exactly 2 <text>.decimal))
     second (<>.codec n.decimal (<text>.exactly 2 <text>.decimal))]
    (<>.lifted (time.time
                [time.#hour hour
                 time.#minute minute
                 time.#second second
                 time.#milli_second 0]))))