Sam, The paragraph about syntax-local-lift-expression is referring to provide _pre_-transformers, not normal provide transformers. You need to use make-provide-pre-transformer, not make-provide-transformer.
--Carl Carl Eastlund On Fri, Nov 23, 2012 at 3:55 PM, Sam Vervaeck <vervaeck....@skynet.be>wrote: > Hi,**** > > ** ** > > I have a question relating to syntax-transformers.**** > > ** ** > > I’m trying to implement my own provide-syntax using * > make-provide-transformer*. The documentation says that it should be > possible to use *syntax-local-lift-expression *to dynamically insert new > variables into the module and then export them (see link below), but I > really don’t seem to get it working. A somewhat trivial example:**** > > ** ** > > (define-syntax one-two-three**** > > (make-provide-transformer**** > > (lambda (stx modes)**** > > (list (make-export (syntax-lift-expression #’1) ‘one #f #f stx)**** > > (make-export (syntax-lift-expression #’2) ‘two #f #f stx) ** > ** > > (make-export (syntax-lift-expression #’3) ‘three #f #f > stx)))))**** > > ** ** > > (povide (one-two-three))**** > > ** ** > > Could you by any chance provide me with an example of how the two > procedures can be used to achieve this?**** > > ** ** > > Greetings,**** > > ** ** > > Sam**** > > **** > > PS: I’m referring to paragraph two of > http://docs.racket-lang.org/reference/stxtrans.html#(tech._provide._transformer) > **** > > ____________________ > Racket Users list: > http://lists.racket-lang.org/users > >
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