Generics nim

ticker.nim

import asyncdispatch, times, os

type 
  TickerFunc* = proc (s: Ticker) : Future[void]

  TickerObj[T] = object
    poll: int 
    running*: bool
    f: TickerFunc
    data: T

  Ticker*[T] = ref TickerObj[T]
  #timer.nim(12, 3) Error: cannot instantiate: 'Ticker'

proc newTimer*[T](f: TickerFunc, data: T = nil, poll: int = 2000,) : Ticker[T] = 
  #Ticker[T](poll: poll, running: false,  f: f, data: data)
  new(result)
  result.data = data
  result.f = f
  result.poll = poll
  return result