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Re: Discrepancy in definition/use of match-data?

From: Stephen J. Turnbull
Subject: Re: Discrepancy in definition/use of match-data?
Date: Fri, 11 Jun 2004 17:34:46 +0900
User-agent: Gnus/5.1006 (Gnus v5.10.6) XEmacs/21.5 (chayote, linux)

>>>>> "David" == David Kastrup <address@hidden> writes:

    David> Now the obvious solution to that would be to make
    David> unsuccessful matches void the match-data, too.  I myself
    David> have no recollection of any discussions about this, but
    David> Stephen Turnbull was pretty vocal about having proposed
    David> something like this,

To be precise, I tried it in a workspace and was immediately slapped
down by a regression test failure.

    David> What I'll do right now is just changing the condition that
    David> it will not flag an error for greater-than-encountered
    David> match-data indices, except for the case of completely void
    David> match-data where I'll still flag an error.

I would suggest improving the error message if at all possible, and
documenting this prominently, as it is likely to happen very rarely,
and then only in asynchronous calls.

Institute of Policy and Planning Sciences     http://turnbull.sk.tsukuba.ac.jp
University of Tsukuba                    Tennodai 1-1-1 Tsukuba 305-8573 JAPAN
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              ask what your business can "do for" free software.

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