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Re: [Grep-devel] [bug-gawk] GNU grep, awk, sed: support \u and \U for un
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From: |
Norihiro Tanaka |
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Subject: |
Re: [Grep-devel] [bug-gawk] GNU grep, awk, sed: support \u and \U for unicode |
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Date: |
Wed, 25 Jan 2017 07:51:09 +0900 |
On Tue, 24 Jan 2017 14:25:25 -0800
Paul Eggert <address@hidden> wrote:
> On 01/23/2017 08:42 PM, David Niklas wrote:
> > how do we implement a Unicode point in a bracket?
>
> Just use the Unicode character. E.g., the regular expression
> works already. Portable scripts that want to search for Unicode
> characters in Unicode locales can do so already, and don't need \u or
> \U or whatever.
Even If we support \u or \U, I think that at least it should not be
applied in expect meta character, and syntax RE_BACKSLASH_ESCAPE_IN_LISTS
should be considered in bracket. RE_BACKSLASH_ESCAPE_IN_LISTS is off in
grep. So if we expand \u or \U in bracket in grep, compatibility will
be lost.