Method array_index

Source/Utils/json.hpp:11867–11890

! @param[in] s reference token to be converted into an array index @return integer representation of @a s @throw parse_error.106 if an array index begins with '0' @throw parse_error.109 if an array index begins not with a digit @throw out_of_range.404 if string @a s could not be converted to an integer @throw out_of_range.410 if an array index e

        @throw out_of_range.410 if an array index exceeds size_type
        */
        static typename BasicJsonType::size_type array_index(const std::string& s)
        {
            using size_type = typename BasicJsonType::size_type;

            // error condition (cf. RFC 6901, Sect. 4)
            if (JSON_HEDLEY_UNLIKELY(s.size() > 1 && s[0] == '0'))
            {
                JSON_THROW(detail::parse_error::create(106, 0,
                    "array index '" + s +
                    "' must not begin with '0'"));
            }

            // error condition (cf. RFC 6901, Sect. 4)
            if (JSON_HEDLEY_UNLIKELY(s.size() > 1 && !(s[0] >= '1' && s[0] <= '9')))
            {
                JSON_THROW(detail::parse_error::create(109, 0, "array index '" + s + "' is not a number"));
            }

            std::size_t processed_chars = 0;
            unsigned long long res = 0;
            JSON_TRY
            {
                res = std::stoull(s, &processed_chars);
            }
                JSON_CATCH(std::out_of_range&)
            {
                JSON_THROW(detail::out_of_range::create(404, "unresolved reference token '" + s + "'"));