why my format doesn't work in boost log
boost, boost-log, c++
Solution
After adding this, the problem was solved.
boost::log::register_simple_formatter_factory< boost::log::trivial::severity_level, char >("Severity");
Full code is located at my blog use boost log step 4
Problem
I am using `boost::log` in this function: ``` #include <boost/log/core.hpp> #include <boost/log/trivial.hpp> #include <boost/log/expressions.hpp> #include <boost/log/utility/setup/file.hpp> void InitLog() { logging::core::get()->set_filter(logging::trivial::severity >= logging::trivial::debug); logging::add_file_log( keywords::file_name = AppHolder::Instance().config().log_folder + "/sign_%Y-%m-%d_%H-%M-%S.%N.log", keywords::rotation_size = 10 * 1024 * 1024, keywords::time_based_rotation = sinks::file::rotation_at_time_point(0, 0, 0), keywords::format = "%TimeStamp% (%LineID%) <%Severity%>: %Message%" ); } ``` Then, given the call: ``` BOOST_LOG_TRIVIAL(info) << "thread id: " << this_thread::get_id() << " Initialization succeeded"; ``` Output is not as expected: timestamp, line id and severity are empty. () <>: thread id: 7f58e30e8740 Initialization succeeded