I couldn't compile following code with msvc 6.5. #include <boost/utility/value_init.hpp> boost::value_initialized<char const> c; Others compilers seems to be ok. Any pointers? Gennadiy. P.S. Error message: ...boost/utility/value_init.hpp(29) : error C2758: 'x' : must be initialized in constructor base/member initializer list ...\boost/utility/value_init.hpp(31) : see declaration of 'x' ...\boost/utility/value_init.hpp(29) : while compiling class-template member function '__thiscall boost::vinit_detail::const_T_base<char const

::boost::vinit_detail::const_T_base<char const >(void)'

P.P.S. But it does present in member initializer list??!! const_T_base() : x() {}