Function is_valid_enum_item

library/include/DataDefs.h:783–794

     */
    template<typename T>
    inline bool is_valid_enum_item(T v)
    {
        if constexpr (complex_enum<T>)
        {
            const auto& complex = df::enum_traits<T>::complex;
            return complex.value_index_map.find(v) != complex.value_index_map.end();
        }
        else
        {
            return df::enum_traits<T>::is_valid(v);
        }
    }


    /**