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85 lines
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85 lines
4.2 KiB
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<title>Boost.Locale: Status of C++0x char16_t/char32_t support</title>
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<a href="http://www.boost.org/">
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<q>...one of the most highly
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<span class="heading-attribution">— <a href=
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<h1>Status of C++0x char16_t/char32_t support </h1> </div>
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<p>The support of C++0x <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>
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<h2><a class="anchor" id="status_of_cpp0x_characters_support_gnu"></a>
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GNU GCC 4.5/C++0x Status</h2>
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<p>GNU C++ compiler provides decent support of C++0x characters however:</p>
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<ol type="1">
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<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>
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<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>
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</ol>
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<h2><a class="anchor" id="status_of_cpp0x_characters_support_msvc"></a>
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Visual Studio 2010 (MSVC10)/C++0x Status</h2>
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<p>MSVC provides all required facets however:</p>
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<ol type="1">
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<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>
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<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++0x requirements making it impossible to write <code>char16_t/char32_t</code> to stream and causing multiple faults. </li>
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<hr class="footer"/><address class="footer"><small>
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© Copyright 2009-2011 Artyom Beilis, Distributed under the <a href="http://www.boost.org/LICENSE_1_0.txt">Boost Software License</a>, Version 1.0.
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