STRIP_COMMENTS = /((\/\/.*$)|(\/\*[\s\S]*?\*\/))/g
ARGUMENT_NAMES = /([^\s,]+)/g

module.exports = (func) ->
  throw new TypeError 'Argument must be a function' unless func instanceof Function
  fnStr = func.toString().replace(STRIP_COMMENTS, "")
  result = fnStr.slice(fnStr.indexOf("(") + 1, fnStr.indexOf(")")).match(ARGUMENT_NAMES)
  result = []  if result is null
  return result