[plt-scheme] match question

The bug server was down, but should be back up now.

Thanks,
sam th

On Tue, May 13, 2008 at 10:18 AM, praimon <praimon at gmail.com> wrote:
> hello,
>  Unfortunately the bug reporting function isn't working for me
>  (the "submitting bug report" message never completes).
>  I'm guessing my firewall is blocking some needed port,
>  or maybe it's something else.
>
>  regards,
>  praimon
>
>
>
>  On Tue, May 13, 2008 at 8:22 AM, Sam TH <samth at ccs.neu.edu> wrote:
>  > On Mon, May 12, 2008 at 11:34 PM, praimon <praimon at gmail.com> wrote:
>  >  > thanks for your response. Would you say that the greediness of
>  >  >  the patterns produces counter-intuitive answers?
>  >  >  Here's a very simple example:
>  >  >
>  >  >  (match '(3 2 4 3 2 1)
>  >  >        ((list x y ... x z ...) (append y z))
>  >  >  => (2 4 3 2)
>  >  >
>  >  >  Surely the result should be (2 4 2 1)? At least that's the intuitively
>  >  >  correct answer (and the one returned by Mathematica, e.g.).
>  >  >
>  >  >  Changing ... to ..1 produces a different counter-intuitive answer: (2 4 3 1).
>  >  >  For people like me, who are merely using your language rather than trying
>  >  >  to understand its inner workings, this is worrisome.
>  >
>  >  Neither of those are the right answer.  There seems to be something
>  >  wrong with non-linear patterns (patterns where a variable appears
>  >  multiple times, like `x' does here) combined with ...  I'll take a
>  >  look at it.
>  >
>  >  If you could file a bug report with that example (see the "Submit Bug
>  >  Report" entry under the Help menu) that would be great.
>  >
>  >  Thanks,
>  >  --
>  >
>  >
>  > sam th
>  >  samth at ccs.neu.edu
>  >
>
>
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-- 
sam th
samth at ccs.neu.edu