void JSON_Parser::GetNextToken()

in Release/src/json/json_parsing.cpp [847:940]
85 lines of code
34 McCabe index (conditional complexity)

void JSON_Parser<CharType>::GetNextToken(typename JSON_Parser<CharType>::Token& result)
{
try_again:
    auto ch = EatWhitespace();

    CreateToken(result, Token::TKN_EOF);

    if (ch == eof<CharType>()) return;

    switch (ch)
    {
        case '{':
        case '[':
        {
            if (++m_currentParsingDepth > JSON_Parser<CharType>::maxParsingDepth)
            {
                SetErrorCode(result, json_error::nesting);
                break;
            }

            typename JSON_Parser<CharType>::Token::Kind tk = ch == '{' ? Token::TKN_OpenBrace : Token::TKN_OpenBracket;
            CreateToken(result, tk, result.start);
            break;
        }
        case '}':
        case ']':
        {
            if ((signed int)(--m_currentParsingDepth) < 0)
            {
                SetErrorCode(result, json_error::mismatched_brances);
                break;
            }

            typename JSON_Parser<CharType>::Token::Kind tk =
                ch == '}' ? Token::TKN_CloseBrace : Token::TKN_CloseBracket;
            CreateToken(result, tk, result.start);
            break;
        }
        case ',': CreateToken(result, Token::TKN_Comma, result.start); break;

        case ':': CreateToken(result, Token::TKN_Colon, result.start); break;

        case 't':
            if (!CompleteKeywordTrue(result))
            {
                SetErrorCode(result, json_error::malformed_literal);
            }
            break;
        case 'f':
            if (!CompleteKeywordFalse(result))
            {
                SetErrorCode(result, json_error::malformed_literal);
            }
            break;
        case 'n':
            if (!CompleteKeywordNull(result))
            {
                SetErrorCode(result, json_error::malformed_literal);
            }
            break;
        case '/':
            if (!CompleteComment(result))
            {
                SetErrorCode(result, json_error::malformed_comment);
                break;
            }
            // For now, we're ignoring comments.
            goto try_again;
        case '"':
            if (!CompleteStringLiteral(result))
            {
                SetErrorCode(result, json_error::malformed_string_literal);
            }
            break;

        case '-':
        case '0':
        case '1':
        case '2':
        case '3':
        case '4':
        case '5':
        case '6':
        case '7':
        case '8':
        case '9':
            if (!CompleteNumberLiteral(static_cast<CharType>(ch), result))
            {
                SetErrorCode(result, json_error::malformed_numeric_literal);
            }
            break;
        default: SetErrorCode(result, json_error::malformed_token); break;
    }
}