import hashes

proc hash(s: string): Hash =
  var key: siphash.Key
    # this is a keyed hash function, use a zero key
  let b: array[8, byte] = sipHash(toOpenArrayByte(s, s.low, s.high), key)
    # the hash fuction operates over byte arrays
  result = cast[Hash](b)
    # casting or converting is up to you