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Postings from January 2004
"Larry Wall" <larry@wall.org> wrote in message
news:20040124014137.GA26838@wall.org...
> That is, suppose you have:
>
> macro leach () { return "»" }
> macro reach () { return "«" }
>
> You could unambiguosly write
>
> leach+reach
>
> but (assuming spaces not allowed within distributed operators) you can't
> write
>
> leacheqreach
But, presumably, you could write a macro that has a whitespace-eater encoded
somehow. That is,
macro leach() { chomp_trailing_whitespace; return "»" }
macro reach () { chomp_leading_whitespace; return "«" }
then the macro magic would expand "leach eq reach" as "»eq«" (which,
hopefully, it then re-parses as a single token^Woperator). This doesn't
solve the generalized problem of disambiguating, though I could see a "_"
operator defined as a macro that eats all its surrounding whitespace.
Dave.
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