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Re^3: Regex Matching Unicode and Regex Classes

by moritz (Cardinal)
on Nov 02, 2011 at 14:41 UTC ( #935408=note: print w/ replies, xml ) Need Help??


in reply to Re^2: Regex Matching Unicode and Regex Classes
in thread Regex Matching Unicode and Regex Classes

Short answer: because Unicode and locales don't mix.

Long answer: Perl's support for locales comes from a time before the whole encoding/decoding business and Unicode support. So if locales are active, the locale-sensitive parts expect to act on bytes, not on decoded strings.

Since the locale is not ISO-8859-1 but UTF-8, encoding to Latin-1 doesn't fix it for you.

If anything, you'd need to encode to UTF-8 to see the \w matching , but even then I don't see it matching. So either my understanding of locales is very wrong, or perl is broken (or a mixture thereof).


Comment on Re^3: Regex Matching Unicode and Regex Classes
Re^4: Regex Matching Unicode and Regex Classes
by McA (Deacon) on Nov 02, 2011 at 14:48 UTC
    Hi Moritz,

    that sounds plausible, but not satisfying. ;-)

    What is then the right approach to find word boundaries with regex while locale is enabled?

    Best regards
    Andreas

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