c++ - Returning reference to a function template -

i have template class called managed has static templated create() function. i'm trying write helper returns function when passed managed subclass type.

typedef std::function<screenbase::ptr (windowbase&)> screenfactory;  template<typename t> screenfactory screen_factory() {     screenfactory ret = &t::create<windowbase&>;     return ret; } 

because create takes template arguments, explicitly try reference instantiation takes windowbase&. far can see above code should work.

however, when try call it, following error:

error: expected '(' function-style cast or type construction screenfactory ret = &t::create<windowbase&>;                                ~~~~~~~~~~^ 

i'm not sure i'm doing wrong, pointers?

you missing template keyword:

template<typename t> screenfactory screen_factory() {     screenfactory ret = &t::template create<windowbase&>;     //                      ~~~~~~~^     return ret; } 

for details please refer where , why have put “template” , “typename” keywords?