interface RandomStringOptions {
  /**
   *大小写.缺省为null
   */
  capitalization?: 'lowercase' | 'uppercase'
  /**
   *指定字符集.缺省为alphanumeric
   *alphanumeric - [0-9 a-z A-Z]
   *alphabetic - [a-z A-Z]
   *numeric - [0-9]
   *hex - [0-9 a-f]
   */
  charset?: string
  /**
   *随机文本的长度.缺省值32
   */
  length?: number
  /**
   *前缀.缺省为null
   */
  prefix?: string
  /**
   *排除不可读的字符0OIl.缺省为false
   */
  readable?: boolean
}

export const : I.IO<boolean> = ...

export const random: I.IO<number> = () => ...

export const randomString = (o?:RandomStringOptions): I.IO<string> => () => ...