Dears There are two codes. The first is workig as it is specified in the documentation, but the second not. Why there are problems with the second code? Regards. // This code works perfectly #include #include #include template class test { public: test () { BOOST_STATIC_ASSERT((boost::is_base_of::value)); } }; int main() { test t (); } // The code belo is not working #include #include #include template <typename B> class test { public: template <typename R> test (R const &) { BOOST_STATIC_ASSERT((boost::is_base_of::value)); } }; int main() { test <int> t (static_cast<int>(0)); } -- |\/\/| Seweryn Habdank-Wojewódzki \/\/