[Boost-users] Compare boost::system::error_category

Subject: [Boost-users] Compare boost::system::error_category
From: Christopher Pisz (christopherpisz_at_[hidden])
Date: 2017-03-23 20:26:02

The following comparison fails for an error whom outputs "asio.misc" for
errorCode.category().name() and "end of file" for errorCode.message()

If it claims to be in category asio.misc, then why does the if condition of
(errorCode.category() == boost::asio::error::misc_category ) evaluate to
false?

Googling says that a boost::system::error_code can have the same value in
more than one category, so I assume that in order to get the proper message
and meaning we must compare boost::system::error_category as well as
boost::system::error_code::value.

How do we properly compare the category if this fails to work?

Code in question:
//--------------------------------------------------------------------------------------------------
std::string ClientSocketASIO::ErrorCodeToString(const
boost::system::error_code & errorCode)
{
    std::ostringstream debugMsg;
    debugMsg << " Error Category: " << errorCode.category().name() << ". "
             << " Error Message: "  << errorCode.message() << ". ";

    if( errorCode.category() == boost::asio::error::misc_category )
    {
        switch (errorCode.value())
        {
        case boost::asio::error::eof:
            debugMsg << ". Server has disconnected.";
            break;
        case boost::asio::error::connection_refused:
            debugMsg << ". Connection Refused";
            break;
        default:
            debugMsg << ". Unknown Error.";
            break;
        }
    }
    else
    {
        debugMsg << ". Unknown Error category.";
    }

    return debugMsg.str();
}

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