[plt-scheme] Problems with eval

I added the require to the module and it didn't have any affect.  I got
exactly the same error.

On Thu, Jul 3, 2008 at 12:05 PM, Chongkai Zhu <czhu at cs.utah.edu> wrote:

> (require (for-syntax scheme/base))
>
> ?
>
>
> Doug Williams wrote:
>
>> I am converting the inference collection over to run on V4.0.1 and I'm
>> having a problem with dynamically evaluating a lambda expression.  Here is a
>> snippet of the code that gives the error:
>>
>> #lang scheme/base
>> ...
>> (define (activate-rule rule initial-node)
>> ...
>>                  (if (null? match-constraints) ;
>> match-constraint-predicate
>>                      #f
>>                      (eval
>>                       `(lambda ,(if assertion-variable
>>                                     (cons assertion-variable
>>                                           (pattern-variables pattern))
>>                                     (pattern-variables pattern))
>>                          (and , at match-constraints))))
>> ...
>>  )
>>
>> And, the error I get is:
>>
>> compile: bad syntax; function application is not allowed, because no #%app
>> syntax transformer is bound in: (lambda (?size ?peg) (and (not (eq? ?peg
>> (quote right)))))
>>
>> This code works in V372.
>>
>> Any ideas?
>>
>> Doug
>> ------------------------------------------------------------------------
>>
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>>
>>
>
>
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