PreamblePostamble-take3.cpp

template <typename F, typename... ARGS>
void PrePost(const F& f, ARGS&&...args) {
    std::cout << "pre\n";
    f(std::forward<ARGS>(args)...);
    std::cout << "post\n";
}

int main() {
  double a = 1.1;
  double b = 2.2;
  double c = 3.3;
  
  PrePost([](auto&& a, auto&& b, auto&& c){
      std::cout << a << " " << b << " " << c << "\n";
  }, a, b, c);
  
  return 0;
}