(import (gauche base)
	(rfc json)
	(srfi 1))
(begin
  (define (json-object . pairs)
    (map (lambda (pair)
	   (cons (symbol->string (car pair))
		 (cdr pair)))
	 pairs))
  (define json-list vector)
  (define json-null 'null)
  (define json-object? list?)
  (define json-list? vector?)

  (define (json-null? obj)
    (eq? obj json-null))

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

  (define array-handler list->vector)
  (define object-handler identity)
  (define (special-handler x)
    (case x
      ((true) #t)
      ((false) #f)
      (else => identity)))

  (define (string->json str)
    (parameterize ((json-array-handler array-handler)
		   (json-object-handler object-handler)
		   (json-special-handler special-handler))
      (parse-json-string str)))

  (define json->string construct-json-string)

  (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 obj)
    (map (lambda (pair)
	   (cons (string->symbol (car pair))
		 (cdr pair)))
	 obj))

  (define json-list->list vector->list))