Hi Steven, While I can use the library just fine in C++98 mode, I am not able to compile the code (basic.cpp) with -std=c++0x enabled on GCC 4.6.3. The compilation fails with the following error message : ./boost/type_erasure/detail/vtable.hpp:155:28: error: constexpr static data member ‘value’ must have an initializer ./boost/type_erasure/detail/vtable.hpp:159:52: error: redeclaration ‘boost::type_erasure::detail::vtable_init<Table, T>::value’ differs in ‘constexpr’ ./boost/type_erasure/detail/vtable.hpp:155:28: error: from previous declaration ‘boost::type_erasure::detail::vtable_init<Table, T>::value’ ./boost/type_erasure/detail/vtable.hpp:159:52: error: ‘boost::type_erasure::detail::vtable_init<Table, T>::value’ declared ‘constexpr’ outside its class ./boost/type_erasure/detail/vtable.hpp:159:52: error: declaration of ‘const Table boost::type_erasure::detail::vtable_init<Table, T>::value’ outside of class is not definition [-fpermissive] I tried to improve the situation myself by replacing line 155 by
static constexpr Table value(T::value...);
But it didn't help (the given message doesn't make much sense to me : "T::value is not a type"). Is it a limitation of GCC 4.6 ? Many thanks, Julien