On page 30, section 10, we have the example:
(let ()
(define-syntax foo
(lambda (e)
(let ([+ -]) (+ 1 2))))
(define + 2)
(foo))
The second argument of |define-syntax| should
evaluate to a transformer (pg 31, 11.2.2).
A tranformer is...a procedure that must...
return a syntax object (lib pg 51, 12.3).
The procedure in the example returns a number.
It should be:
(let ()
(define-syntax foo
(lambda (e)
#'(let ([+ -]) (+ 1 2))))
(define + 2)
(foo))
A similar change should be made to the corresponding
example above, e.g.
(let ()
(define-syntax foo
(lambda (e)
#'(+ 1 2)))
(define + 2)
(foo))
so that it violates only the restriction that is
to be illustrated, and not others.
-- Keith
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