[plt-scheme] help with parser-tools collection

I'm not sure that would be worth the effort.
However, I've recently re-done the regexp language of the lexer for 
v299 so that the programmer can define new regexp operators.  I'll 
release the changes soon, after I write some documentation.

-Scott

On Aug 9, 2004, at 5:21 AM, Noel Welsh wrote:

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>
> --- Scott Owens <sowens at cs.utah.edu> wrote:
>
>> The lexer doesn't have built-in support for
>> case-insensitivity.
>> The best you can do is:
>> (define-lex-abbrevs (z (: "Z" "z")) (o (: "O" "o")) (n (:
>> "N" "n")) (e
>> (: "E" "e")))
>> (lexer
>>   ...
>>   ((@ z o n e) ...)
>>   ...)
>
> If that's the best you can do you aren't even trying!  Real
> men would hack the syntax by writing their own
> define-ci-lex-abbrev macro which expands into
> define-lex-abbrevs.  Writing this macro is left as an
> exercise for the reader.
>
> Cheers,
> Noel
>
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> Email: noelwelsh <at> yahoo <dot> com
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