(import (except (srfi 180) json-null)
	(srfi 1))
(begin
  (define json-object list)
  (define json-list vector)
  (define json-null 'null)
  (define json-object? list?)
  (define json-list? vector?)
  ;; json-null? already defined in srfi 180

  (define (json-object-contains-key? obj key)
    (and (assoc key obj) #t))

  (define (string->json str)
    (call-with-port (open-input-string str)
      (lambda (port)
	(json-read port))))

  (define (json->string json)
    (call-with-port (open-output-string)
      (lambda (port)
	(json-write json port)
	(get-output-string port))))

  (define (json-object-ref json key)
    (let ((pair (assoc key json)))
      (if pair
	  (cdr pair)
	  ((json-key-not-found)))))

  (define json-list-ref vector-ref)
  (define json-list-length vector-length)
  (define json-object->alist values)
  (define json-list->list vector->list))