整数和字符串的racket to-string函数

需要编写一个to-string接受整数和字符串的函数.

(to-string 3) ; -> "3"
(to-string "hello") ; -> "\"hello\""
(to-string "hel\"lo") ; -> "\"hel\\\"lo\""

我设法这样做:

(define (to-string x)
  (define o (open-output-string))
  (write x o)
  (define str (get-output-string o))
  (get-output-bytes o #t)
  str
  )
(to-string 3)
(to-string "hello")
(to-string "hel\"lo")

但是,get-output-bytes重置不是很易读.什么是惯用的球拍方式呢？

~v功能或~s功能是否racket/format适用于您？

> (~v 3)
"3"
> (~v "hello")
"\"hello\""
> (~v "hel\"lo")
"\"hel\\\"lo\""