Re: [Scheme-reports] ANN: first draft of R7RS small language available

[Alex Shinn <alexshinn@x>]

On Sun, Apr 17, 2011 at 3:27 AM, Aaron W. Hsu <arcfide@x> wrote:
> Alex:
>
>> Is there actually any implementation for which this could
>> be a problem?
>
> Chez Scheme has this problem specifically. If you create a library that
> exports a macro using an auxiliary keyword, but do not explicitly export
> that keyword, then the implicit binding in the REPL is different than the
> absent binding in the library, meaning that the keywords do not match, and
> making the macro fail to work. On the other hand, if you use that macro in a
> library where the term is unbound, then the macro will work as anticipated,
> because the call site and the definition site both lack a binding for the
> identifier.

Is this inherent in the psyntax expander?  I'd like to see the
source that results in this behavior to be convinced it can't
easily be fixed.

-- 
Alex

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