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Re: square bracket vs. curly brace character ranges

From: Bob Proulx
Subject: Re: square bracket vs. curly brace character ranges
Date: Tue, 2 Oct 2012 12:47:51 -0600
User-agent: Mutt/1.5.21 (2010-09-15)

Linda Walsh wrote:
> Chet Ramey wrote:
> >http://lists.gnu.org/archive/html/bug-bash/2012-05/msg00086.html
> >...Campaign For Rational Range Interpretation...
> The next version of bash will have a shell option to enable this
> behavior.  It's in the development snapshots if anyone wants to try
> it out now.

> The above relies upon a hack to the algorithm -- use *USEFUL* hack
> in most cases, but still a hack.

Why do you think it is a hack?  Because it isn't in libc?  I might
agree with that.  But if it isn't in libc then in the application is
the only reasonable alternative.

> Note...before bash broke UTF-8 compatiblity, I could use
> en_US.UTF-8, but now I assert the current need to do the above
> is a bug.

This has been discussed a very great many times in a very great many
places and you have been part of that discussion many times.  Please
don't rehash all of that discussion again.  It isn't useful or

> I will make no claim about en_US.iso88591 or other locale-specific
> charsets.  However, UTF-8 defines collation order the same as ASCII in
> the bottom 127 chars.

No it doesn't.  That is the root of the problem.

> Bash ignores UTF-8's collation order.

No it doesn't.  It is using the system libc code which is obeying the
locale collation ordering.  Since that misconception is the basis of
your complaint and that basis is false it isn't useful for more
chatter about more details of it.

> For some reason, I am not allowed to use LC_COLLATE=UTF-8:
> -bash: warning: setlocale: LC_COLLATE: cannot change locale (UTF-8):
> No such file or directory

You are not allowed to use it because your system does not provide
such a file.  If it did then you would.

You might argue that the error message in that case could be more
friendly.  That would be a bash specific discussion and perhaps even a
useful one.  See 'man 3 setlocale' for more details.  On my system
locale files are stored down /usr/share/locale/* paths.


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