Function at

Source/Utils/json.hpp:19792–19806

! @brief access specified array element with bounds checking Returns a reference to the element at specified location @a idx, with bounds checking. @param[in] idx index of the element to access @return reference to the element at index @a idx @throw type_error.304 if the JSON value is not an array; in this case, calling `at` with an inde

        can be thrown.,at__size_type}
        */
        reference at(size_type idx)
        {
            // at only works for arrays
            if (JSON_HEDLEY_LIKELY(is_array()))
            {
                JSON_TRY
                {
                    return m_value.array->at(idx);
                }
                    JSON_CATCH(std::out_of_range&)
                {
                    // create better exception explanation
                    JSON_THROW(out_of_range::create(401, "array index " + std::to_string(idx) + " is out of range"));
                }
            }
            else
            {
                JSON_THROW(type_error::create(304, "cannot use at() with " + std::string(type_name())));