On 09/01/2010 04:01 PM, Jim Meyering wrote:
Do you honestly imagine
http://opengroup.org/onlinepubs/007908775/xbd/re.html changed to say
"If a bracket expression consists of a colon, a series of alphabetic
characters, and another colon, the implementation's behavior is
undefined?
Perhaps that is where we disagree, then.
I do not require that POSIX allow the new behavior.
That may be it. In particular, I think for something that POSIX is
unlikely to aver allow, there should be another way than POSIXLY_CORRECT
to disable it.
"We have nothing to fear but fear itself".
But I doubt you're seriously worried about [A-Z], etc.
Not worried, but it honestly would be a sensible warning whenever
strcoll ("A", "f")<= 0&& strcoll ("f", "Z")<= 0, as is the case in
UTF-8 locales with glibc. It will basically never do the right thing,
since [A-Z] and [a-z] exclude a and Z respectively.
Ranges like [A-Z] are so common that changing the default
would have far-reaching effects. Will it ever be possible?
I don't know. Perhaps if we first allow it to be enabled via
some new environment variable, and then, much later, make it the default.
/me whispers --warn...
Paolo
