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Re: guile 1.8.5 test failure: srfi-14.test

From: Ludovic Courtès
Subject: Re: guile 1.8.5 test failure: srfi-14.test
Date: Fri, 30 May 2008 19:06:39 +0200
User-agent: Gnus/5.11 (Gnus v5.11) Emacs/22.1 (gnu/linux)

Hi Bruno,

Bruno Haible <address@hidden> writes:

> Ludovic Courtès wrote in
> <http://lists.gnu.org/archive/html/bug-guile/2008-05/msg00014.html>:

>> The cardinals of these char sets were taken from SRFI-14:
>>   http://srfi.schemers.org/srfi-14/srfi-14.html#StandardCharsetDefs
>> This indicates that we should fix our SRFI-14 implementation, not the
>> test.  ;-)
> I don't think it's appropriate to take these numbers (117 etc.) as precise
> expectations. Unicode is a moving target: At every Unicode version, new
> characters are being added, and sometimes also the character classification
> into "letters" vs. "non-letters" changes.

I'm unsure about this.  Certainly Unicode is a moving target, but ASCII
and ISO-8859-1 aren't.

OTOH, one could argue that it's Unicode that defines what category each
ASCII/Latin-1 character belongs to.  Nevertheless, it seems reasonable
to expect that character classification for ASCII/Latin-1 won't change
in the future (were there many changes in that area in the past?).

What do you think?


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