namespace cranberries {
namespace cranberries_magic {
  template < class F, class G >
  struct curried_proxy {
    F f;
    G g;
    template < class... Args >
    constexpr decltype(auto) operator()(Args&&... args) const
      noexcept(noexcept(f(g(std::forward<Args>(args)...))))
    {
      return f(g(std::forward<Args>(args)...));
    }
  };

} // ! namespace cranberries_magic

template < class F, class G >
cranberries_magic::curried_proxy<std::decay_t<F>, std::decay_t<G>>
constexpr operator * (F&& f, G&& g) noexcept {
  return { std::forward<F>(f), std::forward<G>(g) };
}
}