[gambit-list] Puzzlement (different behavior of compiled code)
mikael.rcv at gmail.com
Sun Jun 10 12:39:39 EDT 2012
What is the objective with your preprocessor, may Black Hole be of use?
2012/6/10 David Rush <kumoyuki at gmail.com>
> On 10 June 2012 16:09, Marc Feeley <feeley at iro.umontreal.ca> wrote:
> > On 2012-06-10, at 10:47 AM, David Rush wrote:
> >> also interferes with recognizing keywords. I think i need "-:S"
> >> instead, which i guess has been added since I last update my Gambit
> >> makefiles (don't ask - it's been a while)
> > Note that with -:S Gambit recognizes the keyword syntax, but does not
> > implement syntax-case. So I don't think that is what you want (if you
> > define-syntax).
> Oh dear, I think the documentation is perhaps a bit confusing on this
> from the comments on run-time options.
> "The ‘s’ option selects standard Scheme mode. In this mode the reader
> is case-insensitive and keywords are not recognized. The ‘S’ option
> selects Gambit Scheme mode (the reader is case-sensitive and
> recognizes keywords which end with a colon). By default Gambit Scheme
> mode is used."
> and then there's the comment on define-syntax
> "Define name as a macro special form whose expansion is specified by
> expander. This form is available only when the runtime option ‘-:s’ is
> used. This option causes the loading of the ~~lib/syntax-case support
> library, which is the Hieb and Dybvig portable syntax-case
> implementation which has been ported to the Gambit interpreter and
> compiler. Note that this implementation of syntax-case does not
> support special forms that are specific to Gambit."
> I will grant that the two options are only superficially similar, but
> I found it easy to confuse. How hard is it to get Hieb & Dybvig's
> expander to work with the Gambit-mode reader? In any case, I'm sure
> this is why I built Al* Petrofsky's syntax-rules expander into my
> preprocessor, so it is certainly not a show-stopper for me *now*.
> Thanks again to all for the clarification
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