Boost logging set output level

Question

我想知道是否有類似於FLAGS_stderrthreshold的東西，它只輸出比boost庫中的標誌更嚴格的級別。例如，下面的代碼將所有內容打印到控制檯。我可以設置關卡，以便僅打印警告，錯誤和致命信息嗎？

#include <boost/log/core.hpp> 
#include <boost/log/trivial.hpp> 
int main() { 
    using namespace boost::log::trivial; 
    boost::log::sources::severity_logger<severity_level> lg; 
    BOOST_LOG_SEV(lg, trace) << "A trace severity message"; 
    BOOST_LOG_SEV(lg, debug) << "A debug severity message"; 
    BOOST_LOG_SEV(lg, info) << "An informational severity message"; 
    BOOST_LOG_SEV(lg, warning) << "A warning severity message"; 
    BOOST_LOG_SEV(lg, error) << "An error severity message"; 
    BOOST_LOG_SEV(lg, fatal) << "A fatal severity message"; 
    return 0 
} 

實際輸出：

[2014-03-13 22:21:55.734957] [0xc00001d6] [trace] A trace severity message 
[2014-03-13 22:21:55.735957] [0xc00001d6] [debug] A debug severity message 
[2014-03-13 22:21:55.735957] [0xc00001d6] [info] An informational severity message 
[2014-03-13 22:21:55.735957] [0xc00001d6] [warning] A warning severity message 
[2014-03-13 22:21:55.735957] [0xc00001d6] [error] An error severity message 
[2014-03-13 22:21:55.735957] [0xc00001d6] [fatal] A fatal severity message 
Press any key to continue . . . 

慾望輸出：

[2014-03-13 22:21:55.735957] [0xc00001d6] [warning] A warning severity message 
[2014-03-13 22:21:55.735957] [0xc00001d6] [error] An error severity message 
[2014-03-13 22:21:55.735957] [0xc00001d6] [fatal] A fatal severity message 

Answer 1

好發現了它。 ：d

boost::log::core::get()->set_filter (
    boost::log::trivial::severity >= boost::log::trivial::warning 
    ); 

http://www.boost.org/doc/libs/1_54_0_beta1/libs/log/example/doc/tutorial_trivial_flt.cpp