Re: [boost] [locale] Documentation correction

Subject: Re: [boost] [locale] Documentation correction
From: Artyom Beilis (artyomtnk_at_[hidden])
Date: 2011-07-18 01:50:37

----- Original Message ----
> From: Howard Hinnant <howard.hinnant_at_[hidden]>
> To: boost_at_[hidden]
> Sent: Mon, July 18, 2011 12:23:35 AM
> Subject: Re: [boost] [locale] Documentation correction
> 
> On Jul 17, 2011, at 5:09 PM, Beman Dawes wrote:
> 
> > Mac OS X is of  particular interest because by default locale("") does
> > fall, and the  Apple folks have said in the past that they won't fix
> > it. It fails on my  Mac mini in the default configuration. Presumably
> > the Darwin regression  test machine has something beyond the default
> >  configuration.
> 
> Going forward libc++ on Mac OS X (http://libcxx.llvm.org/)  will support a vast 
>array
> of locales, including "".  This is based on BSD's  xlocale  API:
> 

Actually it is not BSD's API it is POSIX 2008 API and BSD family of OSes (like 
FreeBSD)
does not support it.

Currently only Darwin and Linux support such API (and it is not fully compatible 
with
each other and the standard).

BTW GCC's libstdc++ uses Linux's/GNU LibC's newlocale API.

>http://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man3/xlocale.3.html
>l
> 
> The  behavior of "" mimics that of "" passed to  newlocale:
> 
>http://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man3/newlocale.3.html#//apple_ref/doc/man/3/newlocale
>e
> 
> Howard
> 

To be honest... I would not be so optimistic about it at all.

Collation (strcoll_l/strcoll; strxfrm/strxfrm_l) is broken under under
Darwin (even latest) so it would be still limited.

Take a look on what Boost.Locale provides over Darwin/Mac OS X - it
would be something like this but even less.

In any case Boost.Locale provides posix backed that uses this API and you
can freely use it on Darwin platform (of course with its limitations)

 Artyom Beilis
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