[Pika-dev] Keyword implementation

[Andreas Rottmann]

Hi!

I just sat down to do a bit of work on keywords. I've now implemented
lexer support for R5RS-compatible keywords, and am now thinking about
how to best implement the data structure for them. Would a one-slot
vtable object, whose slot carries the symbol corresponding to the
keyword work? This way we can easily reuse parts of the symbols
implementation (e.g. interning), plus KEYWORD->SYMBOL and
SYMBOL->KEYWORD will be quite fast. OTOH, this would make keywords
more heavyweight and EQ? will not work for them, so this is probably
not a good idea. Thoughts?

Thanks,
        Andy
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