[plt-scheme] Macro problem: struct name coincides with macro keyword

From: Jens Axel Søgaard (jensaxel at soegaard.net)
Date: Wed May 3 18:47:48 EDT 2006

Ryan Culpepper wrote:
> If it's just re-exporting the same bindings, I don't see how that
> would help. If it adds a binding for index, then that's no better
> than  having a definition of index in the module where you use
> list-ec---the : generator will only accept an index identifier that
> means "nothing in particular". If you write down index where some
> definition is in scope, either your struct or some other binding, the
> macro pattern will fail to match.
> I can think of three solutions. The first is to change the SRFI code.
> The second is to name your struct something else. The third is to
> create another module where index is not bound and write an "insert
> the identifier 'index' here" macro. That macro must produce the
> entire list-ec expression, or maybe just the generator expression;
> I'm not sure. But you'd have to use it in an expansion context, not
> as a macro that just produced the one identifier.

Okay. I'll change the srfi code for my program.

Hmm. Consider this situation:

    Module A uses library B and library C.
    Library B uses the keyword index just as the SRFI 42 code.
    Library C on the other hand uses the define-index-as-

    Can module A use macros using the index keyword from
    library B?

Jens Axel Søgaard

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