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Postings from November 2010
On Thu, Aug 12, 2010 at 10:36:47AM -0600, karl williamson wrote:
> I hadn't realized this, even though it was in the output of a program
> that Tom sent me a long time ago.
>
> An example is that an underscore matches [[:^alnum:]] iff it is in a
> utf8 string.
I cannot reproduce that. That is, for me, "_" matches [[:^alnum:]] always
(as it should):
$ perl -wE '$_ = "_"; say /[[:^alnum:]]/'
1
$ perl -wE '$_ = "_"; utf8::upgrade $_; say /[[:^alnum:]]/'
1
$ perl -wE '$_ = "_"; utf8::downgrade $_; say /[[:^alnum:]]/'
1
$
(Same output in both 5.10.0 and 5.12.2)
Since an underscore is neither alphabetical, nor numeric, I do not expect
it to match /[[:alnum:]]/.
Abigail
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