Method parseUnicodeCharacterNumber

choc/text/choc_JSON.h:501–530

        }

        uint32_t parseUnicodeCharacterNumber (bool isLowSurrogate)
        {
            uint32_t result = 0;

            for (int i = 4; --i >= 0;)
            {
                auto errorPos = current;
                auto digit = pop();

                if (digit >= '0' && digit <= '9')         digit -= '0';
                else if (digit >= 'a' && digit <= 'f')    digit = 10 + (digit - 'a');
                else if (digit >= 'A' && digit <= 'F')    digit = 10 + (digit - 'A');
                else throwError ("Syntax error in unicode character", errorPos);

                result = (result << 4) + digit;
            }

            if (isLowSurrogate && ! text::isUnicodeLowSurrogate (result))
                throwError ("Expected a unicode low surrogate codepoint");

            if (text::isUnicodeHighSurrogate (result))
            {
                if (! isLowSurrogate && popIf ("\\u"))
                    return text::createUnicodeFromHighAndLowSurrogates ({ result, parseUnicodeCharacterNumber (true) });

                throwError ("Expected a unicode low surrogate codepoint");
            }

            return result;
        }
    };

    Parser p { text, text };