On 2023-07-31 12:43, Bruno Haible via Cygwin wrote:
Corinna Vinschen wrote:
there are more of those expressions which are disabled on glibc and
fail on Cygwin, for instance in test-c32iscntrl.c. Maybe it's actually
the better idea to disable them on Cygwin, too, rather than to change
a working system...
Sure. There is no standard how to map the Unicode properties to POSIX
character classes. Other than the mentioned ISO C constraints for
'digit' and 'xdigit' and a few POSIX constraints, you are free to
map them as you like. For glibc and gnulib, I mapped them in a way
that seemed to make most sense for applications. But different
people might come to different meanings of "make sense".
It seems to me that most application developers needing to support
non-Western-European languages might want a non-POSIX interpretation of digits.
Are the Unicode character attribute classes supported for those application use
cases that need more than POSIX limitations allow?
I know that I sometimes want to see some alternative numeric digit forms and
expect to be able to find those with an appropriate grep expression.
--
Take care. Thanks, Brian Inglis Calgary, Alberta, Canada
La perfection est atteinte Perfection is achieved
non pas lorsqu'il n'y a plus rien à ajouter not when there is no more to add
mais lorsqu'il n'y a plus rien à retirer but when there is no more to cut
-- Antoine de Saint-Exupéry
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