Hi, This is probably a novice template question. I am curious what I am doing wrong here, where I'm trying to get a function object holding a base member of a CRTP class. gcc 4.2.3 complains about: type/value mismatch at argument 1 in template parameter list for 'template<class Derived> template template<class Derived> template<class> class MHBase> struct MHBase< <template-parameter-1-1> >::fooFO Any help appreciated! Thanks, Russell #include #include <iostream> class MHBAccessor { template<class> friend class MHBase; template<class Derived> static int foo(Derived& derived, int i) { return derived.foo_(i); } }; typedef boost::function FooFunc; template <class Derived> struct MHBase { Derived& derived() { return static_cast(*this); } int foo(int i) { return MHBAccessor::foo(this->derived(), i); } template