看如下代碼

function curry(func: (...args: Array<mixed>) => void | mixed): (...args: mixed[]) => mixed {
  const len = func.length
  return function curried(...args: Array<mixed>) {
    const params = [].slice.call(args)
    if (params.length < len) {
      // eslint-disable-next-line
      return function(...args: Array<mixed>) {
        const argsInner = [].slice.call(args)
        return curried.apply(this, params.concat(argsInner))
      }
    }
    return func.call(this, params)
  }
}
function addFunc(x: ?number, y: ?number): ?number {
  const total = x + y
  if (typeof total === 'number') {
    return total
  }
  return 0
}

curry(addFunc)

然后flow報(bào)錯(cuò)了

看了文檔，發(fā)現(xiàn)文檔中說了mixed類型和確切的類型沖突，這里應(yīng)該如何處理。