Hello! I'm trying to use function_traits but it fails to compile. It seems like the add_pointer is somehow related to the error, as using the helper struct directly (and thus avoiding add_pointer on supplied type) compiles ok. I'm using boost 1.30.2 with g++ 3.2.2 on linux. The minimal example is: #include <boost/type_traits/function_traits.hpp> int foo() {} template<typename T> void bar(T f) { typedef typename boost::function_traits<T>::result_type X; //fails to compile typedef typename boost::detail::function_traits_helper<T>::result_type Y; //OK } int main(int argc, char** argv) { bar(foo); } The compiler output is: $ g++ func_traits.cpp func_traits.cpp: In instantiation of `boost::function_traits<int (*)()>': func_traits.cpp:7: instantiated from `void bar(T) [with T = int (*)()]' func_traits.cpp:13: instantiated from here func_traits.cpp:7: base class `boost::detail::function_traits_helper<int (**)()>' has incomplete type func_traits.cpp: In function `void bar(T) [with T = int (*)()]': func_traits.cpp:13: instantiated from here func_traits.cpp:7: no type named `result_type' in `struct boost::function_traits<int (*)()>' Is I'm using function_traits wrong or there is something wrong with the implementation? And another small thing that looks a bit strange to me: for some reason boost/type_traits.hpp does not link boost/type_traits/function_traits.hpp, but it never mentioned in documentation. -- Best regards, Zigmar