If I want dark blood magic for my visitor pattern then I choose C++ over haskell. template <class ...Fs> struct overload : Fs... { te

If I want dark blood magic for my visitor pattern then I choose C++ over haskell. template <class ...Fs> struct overload : Fs... { template <class ...Ts> overload(Ts&& ...ts) : Fs{std::forward<Ts>(ts)}... {} using Fs::operator()...; }; template <class ...Ts> overload(Ts&&...) -> overload<std::remove_reference_t<Ts>...>; int main() { auto fn = overload( [](int x){ std::cerr << "got int " << x << std::endl;} ,[](std::string x) {std::cerr << "got string " << x << std::endl;} ,[](double x){ std::cerr << "got double " << x << std::endl;} ); fn(10); fn("10"); fn(10.); } outputs got int 10 got string 10 got double 10 See it and believe! http://coliru.stacked-crooked.com/a/71d8de3c82b84382 http://coliru.stacked-crooked.com/a/71d8de3c82b84382