c++11 - C++ Functor template for class member functions -

there small functor class wrote should able call class member functions hiding static wrapper function , void pointer object. example below not compile due error when setting wrapper function. want class member pointer template argument. know wrong there?

i think there problem in static function when calling member function. not know how template syntax. minimal example compiles c++11 enabled gcc.

#include <iostream>  template<class treturn, class... tparameter> struct functor {      treturn (*ptr)(void*, tparameter...);     void     *object;      template<class tobject, class tmemberfunction>     static treturn membercaller(void *obj, tparameter... params) {         tobject *c = static_cast<tobject*>(obj);         return (c->*(tobject::tmemberfunction))(params...);     }      treturn operator()(tparameter... params) {         return ptr(object, params...);     } };  class test { public:     void func(int a) {         std::cout << << std::endl;     } };  int main(int argc, const char **argv) {     functor<void, int> f;     test               t;      f.object = &t;     f.ptr    = &functor<void, int>::membercaller<test, test::func>;      f(100); } 

will work you?

#include <iostream>  template<class tobject, class t, class... tparameter> struct functor {      using tmemberfunction = t (tobject::*)(tparameter...);     tmemberfunction ptr;     tobject     *object;       t operator()(tparameter... params) {         return (object->*ptr)(params...);     } };  class test { public:     void func(int a) {         std::cout << << std::endl;     } };  template<typename t> class td;  int main()  {     functor<test, void , int> f;     test               t;      f.object = &t;     f.ptr = &test::func;      f(100); }