get_token_string()

template<typename BasicJsonType , typename InputAdapterType >

std::string nlohmann::detail::lexer< BasicJsonType, InputAdapterType >::get_token_string ( ) const

inline

return the last read token (for errors only).

Will never contain EOF (an arbitrary value that is not a valid char value, often -1), because 255 may legitimately occur. May contain NUL, which should be escaped.

Definition at line 8053 of file json.hpp.

    {
        // escape control characters
        std::string result;
 
        for (const auto c : token_string)
        {
            if (static_cast<unsigned char>(c) <= '\x1F')
            {
                // escape control characters
                std::array<char, 9> cs{{}};
                (std::snprintf)(cs.data(), cs.size(), "<U+%.4X>", static_cast<unsigned char>(c)); // NOLINT(cppcoreguidelines-pro-type-vararg,hicpp-vararg)
                result += cs.data();
            }
 
            else
            {
                // add character as is
                result.push_back(static_cast<std::string::value_type>(c));
            }
        }
 
        return result;
    }