[racket] free-id-table. Is it a bug?

It seems the table needs to be created with #:phase -1.

Since syntax-case uses a fender expression I added
a begin in save-and-define, but it works either way
(because free-id-table-set! returns a non-false value).

#lang racket
(require (for-syntax syntax/id-table))

(define-for-syntax table (make-free-id-table #:phase -1))

(define-syntax (save-and-define stx)
  (syntax-case stx ()
     [(_ ID)
      (begin
        (free-id-table-set! table #'ID 1)
        #'(define ID 1))]))

(define-syntax (load stx)
  (syntax-case stx ()
     [(_ ID2)
      (if (free-id-table-ref table #'ID2 #f)
            #''ok
            #''different)]))

(module+ test
  (save-and-define a)
  (displayln (load a)))

-- 
Jens Axel Søgaard


2014-04-03 7:26 GMT+02:00 Roman Klochkov <kalimehtar at mail.ru>:
> #lang racket
> (require (for-syntax syntax/id-table))
>
> (define-for-syntax table (make-free-id-table))
>
> (define-syntax (save-and-define stx)
>   (syntax-case stx ()
>      [(_ ID) (free-id-table-set! table #'ID 1) #'(define ID 1)]))
>
> (define-syntax (load stx)
>   (syntax-case stx ()
>      [(_ ID2)
>        (if (free-id-table-ref table #'ID2 #f) #''ok #''different)]))
>
> (module+ test
>   (save-and-define a)
>   (displayln (load a)))
>
> ---------
>
> Gives 'different. Expected 'ok
>
> P.S. If I change last sexp to
>
> ;(module+ test
> (save-and-define a)
> (displayln (load a))
>
> then gives 'ok as expected.
>
> Please, help.
>
> --
> Roman Klochkov
>
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>



-- 
--
Jens Axel Søgaard