Function smart_deref

simcore/framework/src/cli/cli.hpp:2576–2578

template <typename T,
          enable_if_t<is_copyable_ptr<typename std::remove_reference<T>::type>::value, detail::enabler> = detail::dummy>
auto smart_deref(T value) -> decltype(*value) {
  return *value;
}

template <typename T, enable_if_t<!is_copyable_ptr<typename std::remove_reference<T>::type>::value, detail::enabler> =
                          detail::dummy>