[plt-scheme] Syntax in teachpack doesn't work.

I went through several paths (while I was trying to figure out what  
was going wrong) and I had cases where at the time of selecting the  
teachpack, there was an error, and others where the error was in the  
interaction window. Can't remember the exact paths though, sorry.

-- Éric


On Jun 21, 2008, at 14:20 , Robby Findler wrote:

> Ah, yes. I should have thought of that myself.
>
> But if you do do that, don't you get an error message somewhat  
> earlier?
>
> Robby
>
> On Sat, Jun 21, 2008 at 12:42 AM, Eric Tanter  
> <etanter at dcc.uchile.cl> wrote:
>> I tried to use that teachpack and ran into similar problems as Paulo.
>>
>> The issue is not in the definition of the module, which as Robby  
>> points out
>> is correct, but seems to appear when one modifies the definition of  
>> the
>> teachpack, and accidentally saves the modified module using the  
>> advanced
>> student (custom) language, rather than the module language.
>>
>> Just make sure you're in the good language when editing/saving the
>> teachpack, and it should work nicely.
>>
>> Hope this helps,
>>
>> -- Éric
>>
>>
>> On Jun 21, 2008, at 07:05 , Robby Findler wrote:
>>
>>> I was able to use that teachpack successfully under v372 (and in the
>>> soon-to-be-released version). This is what I see, for example:
>>>
>>> Welcome to DrScheme, version 372 [3m].
>>> Language: Advanced Student custom; memory limit: 128 megabytes.
>>> Teachpack: iteration.ss.
>>>>
>>>> repeat
>>>
>>> repeat: bad syntax
>>>>
>>>> (repeat 2 (printf "hi\n"))
>>>
>>> hi
>>> hi
>>>>
>>>
>>> On Thu, Jun 19, 2008 at 8:42 AM, Paulo J. Matos <pocm at soton.ac.uk>  
>>> wrote:
>>>>
>>>> Hello, I am trying to create a simple syntax teachpack and I have:
>>>> (module iteration mzscheme
>>>>
>>>> ;; Simplified do
>>>> (define-syntax for
>>>> (syntax-rules ()
>>>>   ((for (var init cond step)
>>>>         command ...)
>>>>    (let loop ((var init))
>>>>      (if (not cond)
>>>>          (void)
>>>>          (begin
>>>>            command
>>>>            ...
>>>>            (loop step)))))))
>>>>
>>>> ;; Simplified^2 do
>>>> (define-syntax repeat
>>>> (syntax-rules ()
>>>>   ((repeat num command ...)
>>>>    (for (x 0 (< x num) (+ x 1))
>>>>         command ...))))
>>>>
>>>> (provide
>>>> (all-defined)))
>>>>
>>>> Then I do add the teachpack and load it but when I try to use  
>>>> repeat:
>>>> repeat: name is not defined, not a parameter, and not a primitive  
>>>> name
>>>>
>>>> I am surely missing something but don't know what (this is still  
>>>> version
>>>> 372).
>>>>
>>>> Cheers,
>>>> --
>>>> Paulo Jorge Matos - pocm at soton.ac.uk
>>>> http://www.personal.soton.ac.uk/pocm
>>>> PhD Student @ ECS
>>>> University of Southampton, UK
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>>>>
>>>>
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