[arximboldi]

You can change the `std::result_of_t<...>` for `typename std::result_of<...>::type` to make it work in C++11 :)

[mhogomchungu]

All my projects are C++14 so it wasnt an issue for me but i liked being c++11 for other people and i am glad there is a way to get it back to c++11. Already committed your suggestion.

Thank you very much.