[Bug regex/11561] Collation characters represented by internal name instead of character sequence

["bensberg at justemail dot net" <sourceware-bugzilla@sourceware.org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=11561

Benno Schulenberg <bensberg at justemail dot net> changed:

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--- Comment #1 from Benno Schulenberg <bensberg at justemail dot net> 2013-02-03 15:37:37 UTC ---
> POSIX especially mentions [[.ch.]] in the example instead of [[.ch-digraph.]]
> so this is a bug in glibc.  It shouldn't be hard to fix it in regcomp.

The easiest fix would be, in my opnion, to rename all the
collation-element names for digraphs from their hyphenated
form to the non-hyphenated form.  But a few users may have
gotten used to using the hyphented forms, working around
this bug in glibc.  They would be pissed.  So for quite a
while both forms will have to recognized.  Attached patch
is an attempt to do this -- when the user specifies [.xx.],
it will first try to look up "xx" in the table of collation
elements, and when that fails, it will look up "x-x".  Is
this what you had in mind, Paolo?

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