https://svn.boost.org/trac10/ticket/1475 <p> See, eg, <a class="ext-link" href="http://tinyurl.com/3666gx"><span class="icon">​</span>http://tinyurl.com/3666gx</a> </p> <pre class="wiki"> call "C:\Program Files\Microsoft Visual Studio 9.0\VC\vcvarsall.bat" x86 &gt;nul cl /Zm800 -nologo @"C:\temp\regression\results\boost\bin.v2\libs\xpressive\test\test_symbols.test\msvc-9.0\debug\link-static\threading-multi\test_symbols.obj.rsp" test_symbols.cpp using native typeof C:\temp\regression\boost\boost/typeof/msvc/typeof_impl.hpp(172) : error C2975: 'ref_type_info' : invalid template argument for 'boost::type_of::msvc_typeid_wrapper', expected compile-time constant expression C:\temp\regression\boost\boost/typeof/msvc/typeof_impl.hpp(174) : see reference to class template instantiation 'boost::type_of::encode_type&lt;T&gt;' being compiled C:\temp\regression\boost\boost/typeof/msvc/typeof_impl.hpp(172) : error C2440: 'specialization' : cannot convert from 'int' to 'const type_info &amp;' </pre> en-us /htdocs/site/boost.png https://svn.boost.org/trac10/ticket/1475 Trac 1.4.3 Peder Holt Thu, 06 Dec 2007 10:13:35 GMT https://svn.boost.org/trac10/ticket/1475#comment:1 https://svn.boost.org/trac10/ticket/1475#comment:1 <ul> <li><strong>status</strong> <span class="trac-field-old">new</span> → <span class="trac-field-new">closed</span> </li> <li><strong>resolution</strong> → <span class="trac-field-new">fixed</span> </li> </ul> <p> The code for VC8 and VC9 has been reverted to use sizeof in stead of typeid in typeof emulation. This solves the problem. </p> Ticket