到目前为止，我一直在使用

void initLog() {
    boost::log::add_common_attributes();
    
    boost::log::add_console_log(std::cout, boost::log::keywords::auto_flush = true,
        boost::log::keywords::format = "[%TimeStamp%] [%ThreadID%] [%Severity%] %Message%");
}

int main() {
   initLog();
   BOOST_LOG_TRIVIAL(info)<<"My message";
}

这产生如下消息
[2023-01-31 08:08:13.300149] [0x00007f66a048d000] [info] My message
现在，我想用一个自定义格式化程序来替换这个设置，如下所示：

void coloring_formatter(const boost::log::record_view& record, boost::log::formatting_ostream& stream) {
    auto severity = record[boost::log::trivial::severity];
    assert(severity);

    switch (severity.get()) {
    case boost::log::trivial::severity_level::trace:
        stream << "\e[97m";
        break;
    case boost::log::trivial::severity_level::debug:
        stream << "\e[34m";
        break;
    case boost::log::trivial::severity_level::info:
        stream << "\e[32m";
        break;
    case boost::log::trivial::severity_level::warning:
        stream << "\e[93m";
        break;
    case boost::log::trivial::severity_level::error:
        stream << "\e[91m";
        break;
    case boost::log::trivial::severity_level::fatal:
        stream << "\e[41m";
        break;
    }

    stream /* << boost::log::extract<boost::posix_time::ptime>("TimeStamp", record) << ": " */ //<< doesnt compile
           << boost::log::extract<unsigned int>("ThreadID", record) << ": " // << empty?
           << record[boost::log::expressions::message]; // << that's the only one working

    if (severity) {
        stream << "\033[0m";
    }
    
}

void initLogWithFormatter() {
    boost::log::add_common_attributes();
    
    auto consoleLog = boost::log::add_console_log(std::cout, boost::log::keywords::auto_flush = true);

    consoleLog->set_formatter(&coloring_formatter);
}

int main() {
   initLogWithFormatter();
   BOOST_LOG_TRIVIAL(info)<<"My message";
}

然而，这并不像我期望的那样访问属性，比如ThreadID，而是简单地输出（至少是彩色的）
: My message

如何在自定义格式化程序中访问boost::log::record_view&中boost::log::add_common_attributes()添加的属性？