Re: [Boost-users] [Locale] as::ftime formatting

Subject: Re: [Boost-users] [Locale] as::ftime formatting
From: Artyom Beilis (artyomtnk_at_[hidden])
Date: 2013-01-09 09:40:23

----- Original Message -----

> From: Szymon Gatner <szymon.gatner_at_[hidden]>
> To: boost-users <Boost-users_at_[hidden]>
> Cc: 
> Sent: Wednesday, January 9, 2013 3:29 PM
> Subject: [Boost-users] [Locale] as::ftime formatting
> 
> Hey,
> 
> docs say: "There is a list of supported strftime flags by ICU
> backend:". I didn't build my boost/locale with ICU but still tried
> what happens when I try as::ftime("%A") an to my surprise I got
> correctly localized day of the week.

It uses general format of strftime familiy of functions. The supported
flags depend on actual backend.


- For "posix" and "std" backeds these are native flags and depend on implementation.
- For ICU these flags are not-native and are translated to ICU specific ones (see the list)
- For winapi they are transated as well and have different tags set, in general
  all but '%j' are supported. Full list can be found there:

  https://svn.boost.org/svn/boost/trunk/libs/locale/src/win32/api.hpp


> 
> My questions are: is it correct that it works without ICU?

Yes

> will it work on other machines (Win 32 bit)?

If you use winapi or std backends some locales may be
not installed. So if you use Chinese locales and
they are not installed they may not work.

> What is the encoding of output
> string? I am seeing it correctly displayed as utf-8 but would like to
> know what is happening. Can I ensure utf-8 output?
> 

Yes, it happens because Boost.Locale uses Wide API under Windows to get
Unicode characters

> My test code:
> 
> using namespace boost::locale;
> 
> generator gen;
> locale loc=gen("");
> 
> std::ostringstream ostr;
> ostr.imbue(loc);
> ostr << as::datetime << as::ftime("%A") << 
> info.time;
> std::String timeStr = ostr.str();
> 
> Cheers,
> Simon
> 
> -- 
> Szymon Gatner
> The Lordz Games Studio
> www.thelordzgamesstudio.com

Regards,


Artyom Beilis

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