[racket-dev] 5.2.0.1: displayln appears to write to console from where drracket was launched

Well, when you do IO at compile time there isn't really a good place
to put it (at least not at the moment) so instead of making a good
place to put it, I just let it go to drracket's stdout. Probably
reasonable to consider this a bug.

Robby

On Wed, Oct 19, 2011 at 4:06 PM, Matthias Felleisen
<matthias at ccs.neu.edu> wrote:
>
> Yeap, I have live CS running all the time. Interesting effect.
>
>
> On Oct 19, 2011, at 5:02 PM, Robby Findler wrote:
>
>> Probably when you were running check syntax? (Or maybe when it was
>> being run for you?)
>>
>> Robby
>>
>> On Wed, Oct 19, 2011 at 4:01 PM, Matthias Felleisen
>> <matthias at ccs.neu.edu> wrote:
>>>
>>> I am running the silly program below (no meaning), and on occasion I see the output of the *** line in the console from where I launched drracket. 5.2.0.1 from 10/16
>>>
>>>
>>> #lang racket
>>>
>>> (require (for-syntax syntax/parse))
>>>
>>> (define-for-syntax (postfix stx word stem)
>>>  (datum->syntax stx (string->symbol (string-append word "-" (symbol->string stem)))))
>>>
>>> (define-syntax (define-un-serialize stx)
>>>  (syntax-parse stx
>>>    [(_ name:id (argument:id ...) unparser:expr parser:expr)
>>>     (define serialize   (postfix stx "serialize"   (syntax-e #'name)))
>>>     (define deserialize (postfix stx "deserialize" (syntax-e #'name)))
>>>     (displayln `(,serialize ,deserialize)) ;; ****
>>>     #`(define-values (#,serialize #,deserialize)
>>>         (values (lambda (argument ...) unparser)
>>>                 (lambda (msg) parser)))]))
>>>
>>> (define-un-serialize f (x y) values values)
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>
>