[Boost-users] Boost 1.49 Locale Conversion failed

[NtVisigoth]

Hello, everyone!

I have already answred here: http://lists.boost.org/boost-users/2012/07/75097.php

But previous latter badly typed.

When using boost::locale with the russian language of the string in UTF-8 encoding I get an error while getting the locale.

An exception with the message e.what(): "Conversion failed" is thrown

My code is not very different from that in the examples:

#define  TR(S)  boost::locale::translate(S).str()

const std::string strDefaultLangId( "en" );

int main( int argc, char * argv[] )

{

    using namespace std;

    using namespace boost::locale;

    int exitCode = EXIT_SUCCESS;

    try

    {

        generator gen;

        gen.add_messages_path("g:\\source\\boost_locale\\languages\\");

        gen.add_messages_domain("messages");

        std::string language( argc == 2 ? argv[1] : strDefaultLangId.c_str() );

        std::locale loc = gen( language );

        locale::global( loc );

        std::wstring s = TR(L"hello world");

        wcout << s << endl;

    }

    catch( exception& e )

    {

        cout << "Error : " << e.what() << endl;

        exitCode = EXIT_FAILURE;

    }

    catch( ... )

    {

        cout << "Unknown error" << endl;

        exitCode = EXIT_FAILURE;

    }

    return exitCode;

}

The path to the file with the russian language: "g:\source\boost_locale\languages\ru\LC_MESSAGES\messages.mo"

What could be wrong?

* Is it necessary to use the backends?

* Is it yet necessary to call imbue on the stream? But I'd like avoid it because I am going to write the log using glog. 

Compillers : Microsoft Visual Studio 2008 and 2010

Boost version : 1.49

[Artyom Beilis]

The locale name should be "en_US.UTF-8" or "ru_RU.UTF-8", the default UTF-8 locale is for

default system locale "".

When you set locale as "en" it assumes that encoding (as not specified) is US-ASCII and conversion fails.

 

Artyom Beilis
--------------
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---

From: NtVisigoth <ntvis...@gmail.com>
To: boost...@lists.boost.org
Sent: Tuesday, July 10, 2012 12:36 PM
Subject: [Boost-users] Boost 1.49 Locale Conversion failed

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[NtVisigoth]

2012/7/10 Artyom Beilis <arty...@yahoo.com>

I have :

1) Russian language Filename : g:\project\proba\locale\ru_RU.UTF-8\LC_MESSAGES\messages.mo

2) Russian language locale name in С++-source:

const  std::string  ruLanguage( "ru_RU" )

Is it correct?

I dont understand How Boost Locale finds languages MO-file by their locale names in C++-source.

[Artyom Beilis]

>________________________________
> From: NtVisigoth <ntvis...@gmail.com>
>To: boost...@lists.boost.org

>Sent: Tuesday, July 10, 2012 4:16 PM
>Subject: Re: [Boost-users] Boost 1.49 Locale Conversion failed>I have :

>
>1) Russian language Filename : g:\project\proba\locale\ru_RU.UTF-8\LC_MESSAGES\messages.mo
>2) Russian language locale name in С++-source:
>const  std::string  ruLanguage( "ru_RU" )
>
>
>Is it correct?

No

   Filename : g:\project\proba\locale\ru\LC_MESSAGES\messages.mo
   locale name in С++-source:"ru_RU.UTF-8"

>
>
>I dont understand How Boost Locale finds languages MO-file by their locale names in C++-source.

See: http://www.boost.org/doc/libs/1_50_0/libs/locale/doc/html/messages_formatting.html
 

Artyom Beilis
--------------
CppCMS - C++ Web Framework:   http://cppcms.com/
CppDB - C++ SQL Connectivity: http://cppcms.com/sql/cppdb/

[NtVisigoth]

2012/7/10 Artyom Beilis <arty...@yahoo.com>

I written another proba-project:

const  std::string  strLanguagesPath( "g:\\source\\boost_locale\\languages\\" );

const  std::string  strLanguageFilename( "messages" );

const  std::string  strEnLanguage( "en_US.UTF-8" );

const  std::string  strRuLanguage( "ru_RU.UTF-8" );

int main( int argc, char * argv[] )

{

    using namespace std;

    using namespace boost::locale;

    int exitCode = EXIT_SUCCESS;

    try

    {

        generator gen;

        gen.add_messages_path( strLanguagesPath );

        gen.add_messages_domain( strLanguageFilename );

        cout << "Start Boost.Locale proba" << endl;

        std::locale en_loc = gen( strEnLanguage );

        wcout << TREX( L"hello world", en_loc ) << endl;

        std::locale ru_loc = gen( strRuLanguage );

        wcout << TREX( L"hello world", ru_loc ) << endl;

        cout << "Stop Boost.Locale proba" << endl;

File paths:

g:\source\boost_locale\languages\en\LC_MESSAGES\messages.mo

g:\source\boost_locale\languages\ru\LC_MESSAGES\messages.mo

and I see in STDOUT following:

Start Boost.Locale proba

Hello world Localized

Stop Boost.Locale proba

Press any key to continue . . .

There no any russian strings in STDOUT. Why?

[Viatchesla...@h-d-gmbh.de]

On Tue, 10 Jul 2012 16:17:30 +0200, NtVisigoth <ntvis...@gmail.com>
wrote:

>
> I written another proba-project:
>
> const std::string strLanguagesPath(
> "g:\\source\\boost_locale\\languages\\" );
> const std::string strLanguageFilename( "messages" );
> const std::string strEnLanguage( "en_US.UTF-8" );
> const std::string strRuLanguage( "ru_RU.UTF-8" );
>
> int main( int argc, char * argv[] )
> {
> using namespace std;
> using namespace boost::locale;
>
> int exitCode = EXIT_SUCCESS;
> try
> {
> generator gen;
>
> gen.add_messages_path( strLanguagesPath );
> gen.add_messages_domain( strLanguageFilename );
>
> cout << "Start Boost.Locale proba" << endl;
> std::locale en_loc = gen( strEnLanguage );
> wcout << TREX( L"hello world", en_loc ) << endl;
>
> std::locale ru_loc = gen( strRuLanguage );
> wcout << TREX( L"hello world", ru_loc ) << endl;
> cout << "Stop Boost.Locale proba" << endl;
>

Hi,

I have very little experience with locales, but would note few things here:

1) You're using wcout for UTF-8 - that's not legal, at least in gcc world
(have no dev win machine under hand)

2) what's TREX macro? Please always provide full test case.

3) May it be that your console cannot output non-ASCII symbols? Look at
the string in debugger just to be sure.

-- Slava

[NtVisigoth]

2012/7/11 <Viatchesla...@h-d-gmbh.de>

2) I am sorry. I use next macroses:

#define  TR(S)      boost::locale::translate(S)

#define  TREX(S,L)  boost::locale::translate(S).str(L)

3) You are right! See:

c:\>chcp

Active code page: 866

[Vicente J. Botet Escriba]

Le 10/07/12 16:17, NtVisigoth a écrit :

Hi,

I guess you need to associate the locale ru_loc on the stream wcout.


Vicente