<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=9"/>
<meta name="generator" content="Doxygen 1.8.6"/>
<title>Boost.Locale: Status of C++11 char16_t/char32_t support</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="dynsections.js"></script>
<link href="navtree.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="resize.js"></script>
<script type="text/javascript" src="navtree.js"></script>
<script type="text/javascript">
  $(document).ready(initResizable);
  $(window).load(resizeHeight);
</script>
<link href="doxygen.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
<div id="titlearea">
<table cellspacing="0" cellpadding="0">
 <tbody>
 <tr style="height: 56px;">
  <td id="projectlogo"><img alt="Logo" src="boost-small.png"/></td>
  <td style="padding-left: 0.5em;">
   <div id="projectname">Boost.Locale
   </div>
  </td>
 </tr>
 </tbody>
</table>
</div>
<!-- end header part -->
<!-- Generated by Doxygen 1.8.6 -->
  <div id="navrow1" class="tabs">
    <ul class="tablist">
      <li><a href="index.html"><span>Main&#160;Page</span></a></li>
      <li class="current"><a href="pages.html"><span>Related&#160;Pages</span></a></li>
      <li><a href="modules.html"><span>Modules</span></a></li>
      <li><a href="namespaces.html"><span>Namespaces</span></a></li>
      <li><a href="annotated.html"><span>Classes</span></a></li>
      <li><a href="files.html"><span>Files</span></a></li>
      <li><a href="examples.html"><span>Examples</span></a></li>
    </ul>
  </div>
</div><!-- top -->
<div id="side-nav" class="ui-resizable side-nav-resizable">
  <div id="nav-tree">
    <div id="nav-tree-contents">
      <div id="nav-sync" class="sync"></div>
    </div>
  </div>
  <div id="splitbar" style="-moz-user-select:none;" 
       class="ui-resizable-handle">
  </div>
</div>
<script type="text/javascript">
$(document).ready(function(){initNavTree('status_of_cpp0x_characters_support.html','');});
</script>
<div id="doc-content">
<div class="header">
  <div class="headertitle">
<div class="title">Status of C++11 char16_t/char32_t support </div>  </div>
</div><!--header-->
<div class="contents">
<div class="textblock"><p>The support of C++11 <code>char16_t</code> and <code>char32_t</code> is experimental, mostly does not work and not intended to be used in production with current latest compilers: GCC-4.5, MSVC10 till major compiler's flaws would be fixed.</p>
<h1><a class="anchor" id="status_of_cpp0x_characters_support_gnu"></a>
GNU GCC 4.5/C++11 Status</h1>
<p>GNU C++ compiler provides decent support of C++11 characters however:</p>
<ol type="1">
<li>Standard library does not install any std::locale::facets for this support so any attempt to format numbers using <code>char16_t</code> or <code>char32_t</code> streams would just fail.</li>
<li>Standard library misses specialization for required <code>char16_t/char32_t</code> locale facets, so "std" backends is not build-able as essential symbols missing, also <code>codecvt</code> facet can't be created as well.</li>
</ol>
<h1><a class="anchor" id="status_of_cpp0x_characters_support_msvc"></a>
Visual Studio 2010 (MSVC10)/C++11 Status</h1>
<p>MSVC provides all required facets however:</p>
<ol type="1">
<li>Standard library does not provide installations of std::locale::id for these facets in DLL so it is not usable with <code>/MD</code>, <code>/MDd</code> compiler flags and requires static link of the runtime library.</li>
<li><code>char16_t</code> and <code>char32_t</code> are not distinct types but rather aliases of unsigned short and unsigned types which contradicts to C++11 requirements making it impossible to write <code>char16_t/char32_t</code> to stream and causing multiple faults.</li>
</ol>
<p>If you want to build or test Boost.Locale with C++11 char16_t and char32_t support you should pass <code>cxxflags="-DBOOST_LOCALE_ENABLE_CHAR32_T -DBOOST_LOCALE_ENABLE_CHAR16_T"</code> to <code>b2</code> during build and define <code>BOOST_LOCALE_ENABLE_CHAR32_T</code> and <code>BOOST_LOCALE_ENABLE_CHAR32_T</code> when using Boost.Locale </p>
</div></div><!-- contents -->
</div><!-- doc-content -->

    <li class="footer">
&copy; Copyright 2009-2012 Artyom Beilis,  Distributed under the <a href="http://www.boost.org/LICENSE_1_0.txt">Boost Software License</a>, Version 1.0.
    </li>
   </ul>
 </div>
</body>
</html>
