On 1/18/19 6:45 AM, hh h wrote:
Hi Andrey,
Those are just examples in the docs. These particular examples don't exist as standalone files. You can find global loggers used in a number of other examples in the libs/log/example directory.
The global loggers is working well, but I could not compile the local log severity, here is the code:
BOOST_LOG_INLINE_GLOBAL_LOGGER_CTOR_ARGS(my_logger, boost::log::sources::channel_logger_mt< >, (boost::log::keywords::channel = "general"))
If you want a severity level attribute, that should be severity_channel_logger_mt< ServerityLevel_t >.
typedef enum { INFO, DEBUG, WARNING, ERROR, CRITICAL } ServerityLevel_t;
template<typename CharT, typename TraitsT> std::basic_ostream< CharT, TraitsT >& operator << (std::basic_ostream< CharT, TraitsT >& strm, ServerityLevel_t lvl) { static const char* const str[] = { "INFO", "DEBUG", "WARNING", "ERROR", "CRITICAL" }; if (static_cast< std::size_t >(lvl) < (sizeof(str) / sizeof(*str))) { strm << str[lvl]; } else { strm << static_cast< int >(lvl); } return strm; }
#define LOG(severity) BOOST_LOG_STREAM_WITH_PARAMS((my_logger::get()), (SetGetAttrib("FileName", PathToFilename(__FILE__)))(SetGetAttrib("LineNumber", (unsigned int)__LINE__))(ServerityLevel_t::severity))
/usr/include/boost/log/sources/channel_feature.hpp:171:60: error: no match for ‘operator[]’ (operand types are ‘const ServerityLevel_t’ and ‘boost::parameter::aux::default_<boost::log::v2_mt_posix::keywords::tag::channel, const boost::parameter::void_>’) return open_record_with_channel_unlocked(args, args[keywords::channel | parameter::void_()]);
I'm not sure what SetGetAttrib is, but BOOST_LOG_STREAM_WITH_PARAMS assumes the parameters are Boost.Parameter named parameters. I.e. to pass a severity level you need to say: (::boost::log::keywords::severity = ServerityLevel_t::severity) and to pass a channel name: (::boost::log::keywords::channel = (chan)) If you want to use named parameters to add FileName and LineNumber attributes, you will have to write your own logger feature and add it to the severity level and channel features, as described here: https://www.boost.org/doc/libs/1_69_0/libs/log/doc/html/log/extension/source... If you don't need to apply filters to these attributes, you can just use add_value manipulator in your macro: https://www.boost.org/doc/libs/1_69_0/libs/log/doc/html/log/detailed/utiliti... That will work without having to develop a new logger feature.