The localedata generation code defines is_alpha based on Unicode categories L*, plus Nl, Nd, and a moderate number of special cases mostly to fix Thai language support (to fix is_alpha returning false for letters in category Mn). However Thai is not the only language affected; any language that uses non-spacing letters is broken by glibc's deficient is_alpha definition. As a particular example, all of the Tibetan subjoined letters are considered non-alphabetic (and thus punctuation) by glibc. Unicode addresses this issue by defining the Other_Alphabetic property in PropList.txt and the Alphabetic derived property in DerivedCoreProperties.txt, the latter of which consists of Lu+Ll+Lt+Lm+Lo+Nl + Other_Alphabetic. This subsumes all special-case hacks for Thai in glibc's gen-unicode-ctype.c and fixes the issue (at least approximately) for all other languages/scripts at the same time. glibc's localedata should adopt the definition of Alphabetic from Unicode's DerivedCoreProperties.txt (and still add Nd and the special cases from So).
Ping. Has anybody looked at this?
We know that there are over 500 open bugs and bugs are filed faster than they are fixed. Constructive responses on libc-alpha to <http://sourceware.org/ml/libc-alpha/2012-08/msg00611.html> regarding how to get more people actively fixing more bugs would be more useful, towards the goal of getting down to maybe 100 bugs that are genuinely hard, than pinging individual bugs (unless the ping is for something like reminding someone to submit a patch or test whether a commit has fixed the bug for them - where there is clear in-progress work that may have been forgotten about). There's plenty of room for an interested person to become glibc's character set expert and address this bug, bug 14094 and bug 14095 (only 14095 is particularly likely to be hard) and probably other bugs as well.
Joseph, thanks for acknowledging this bug. Issue 14094 looks related (as in, both could be resolved at the same time, if desired), but 14095 is a completely separate matter and I don't think it's helpful to tie them together.
On Fri, 25 Oct 2013, bugdal at aerifal dot cx wrote: > Joseph, thanks for acknowledging this bug. Issue 14094 looks related (as in, > both could be resolved at the same time, if desired), but 14095 is a completely > separate matter and I don't think it's helpful to tie them together. The connection is that they all (and bug 16061) need someone to act as glibc's character set / Unicode expert and do a proper analysis of the issues involved and the current state of this data in glibc.
On Fri, Oct 25, 2013 at 03:19:28PM +0000, joseph at codesourcery dot com wrote: > The connection is that they all (and bug 16061) need someone to act as > glibc's character set / Unicode expert and do a proper analysis of the > issues involved and the current state of this data in glibc. My view is that I don't think it requires a collation expert to handle the fixing of the alphabetic class and/or updating the character class data to latest Unicode. Collation is a much more specialized expertise requirement.
(In reply to Rich Felker from comment #5) > On Fri, Oct 25, 2013 at 03:19:28PM +0000, joseph at codesourcery dot com > wrote: > > The connection is that they all (and bug 16061) need someone to act as > > glibc's character set / Unicode expert and do a proper analysis of the > > issues involved and the current state of this data in glibc. > > My view is that I don't think it requires a collation expert to handle > the fixing of the alphabetic class and/or updating the character class > data to latest Unicode. Collation is a much more specialized expertise > requirement. https://sourceware.org/bugzilla/show_bug.cgi?id=14094#c33 amd following comments address the problem with the alphabetic class and updating the character classes to the latest Unicode. So I think we can mark this bug here as a duplicate of bug#14094. *** This bug has been marked as a duplicate of bug 14094 ***
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