forward_as

forward_as

   template<typename T, typename V>
   decltype(auto)
   forward_as(V && value)
   {
        return static_cast<
            std::conditional_t<
                std::is_lvalue_reference<T>::value,
                    std::remove_reference_t<V> &,
                    std::remove_reference_t<V> &&>>(value);
   }