While loops for Racket

This basically provides while, break and continue.

1 Example and usage

#lang racket/base

(require dyoo-while-loop)

(while (not (string=? (read-line)

"quit"))

(printf "quit?  "))

(while #t

(define input (read-line))

(unless (regexp-match #px"please" input)

(printf "You didn't say please\n")

(continue))

(when (regexp-match #px"quit" input)

(break)))