Hi. The problem was in forgotten include. #include <boost/log/support/date_time.hpp> On Sun, 11 Jan 2015 10:48:39 +0300, Igor Mironchik <igor.mironchik@gmail.com> wrote:

Hi,

I modified a little the code and now I have compiler error:

#include <boost/log/trivial.hpp> #include <boost/log/sinks.hpp> #include <boost/log/expressions.hpp> #include <boost/log/utility/setup/common_attributes.hpp> #include <boost/log/utility/setup/file.hpp>

void init() { boost::log::add_file_log ( boost::log::keywords::file_name = "sample_%Y%m%d.log", boost::log::keywords::auto_flush = true, boost::log::keywords::open_mode = ( std::ios::out | std::ios::app ), boost::log::keywords::time_based_rotation = boost::log::sinks::file::rotation_at_time_point( 0, 0, 0 ), boost::log::keywords::format = ( boost::log::expressions::stream << boost::log::expressions::format_date_time< boost::posix_time::ptime >( "TimeStamp", "[%H:%M:%S]" ) << " [" << boost::log::trivial::severity << "] : " << boost::log::expressions::smessage ) );

boost::log::add_common_attributes(); }

int main(int, char*[]) { init();

BOOST_LOG_TRIVIAL( trace ) << "A trace severity message"; BOOST_LOG_TRIVIAL( debug ) << "A debug severity message"; BOOST_LOG_TRIVIAL( info ) << "An informational severity message"; BOOST_LOG_TRIVIAL( warning ) << "A warning severity message"; BOOST_LOG_TRIVIAL( error ) << "An error severity message"; BOOST_LOG_TRIVIAL( fatal ) << "A fatal severity message";

return 0; }

What produces the next errors:

C:\Thirdparty\include\boost/log/expressions/formatters/date_time.hpp(94) : error C2027: use of undefined type 'boost::log::v2s_mt_nt5::expressions::aux::date_ti me_formatter_generator_traits<boost::posix_time::ptime,char,void>' C:\Thirdparty\include\boost/log/expressions/formatters/date_time.hpp(93) : while compiling class template member function 'boost::log::v2s_mt_nt5::expre ssions::format_date_time_terminal<T,FallbackPolicyT,CharT>::format_date_time_ter minal(const boost::log::v2s_mt_nt5::attribute_name &,const boost::log::v2s_mt_nt 5::fallback_to_none &,const std::basic_string<char,std::char_traits<char>,std::a llocator<char>> &)' with [ T=boost::posix_time::ptime , FallbackPolicyT=boost::log::v2s_mt_nt5::fallback_to_none , CharT=char ] C:\Thirdparty\include\boost/log/expressions/formatters/date_time.hpp(229 ) : see reference to function template instantiation 'boost::log::v2s_mt_nt5::ex pressions::format_date_time_terminal<T,FallbackPolicyT,CharT>::format_date_time_ terminal(const boost::log::v2s_mt_nt5::attribute_name &,const boost::log::v2s_mt _nt5::fallback_to_none &,const std::basic_string<char,std::char_traits<char>,std ::allocator<char>> &)' being compiled with [ T=boost::posix_time::ptime , FallbackPolicyT=boost::log::v2s_mt_nt5::fallback_to_none , CharT=char ] C:\Thirdparty\include\boost/mpl/aux_/preprocessed/plain/or.hpp(51) : see reference to class template instantiation 'boost::log::v2s_mt_nt5::expressions: :format_date_time_terminal<T,FallbackPolicyT,CharT>' being compiled with [ T=boost::posix_time::ptime , FallbackPolicyT=boost::log::v2s_mt_nt5::fallback_to_none , CharT=char ] C:\Thirdparty\include\boost/phoenix/core/actor.hpp(192) : see reference to class template instantiation 'boost::mpl::or_<boost::phoenix::is_custom_termi nal<Expr,void>,boost::mpl::bool_<false>,boost::mpl::false_,boost::mpl::false_,bo ost::mpl::false_>' being compiled with [ Expr=boost::log::v2s_mt_nt5::expressions::format_date_time_terminal< boost::posix_time::ptime,boost::log::v2s_mt_nt5::fallback_to_none,char> ] C:\Thirdparty\include\boost/log/expressions/formatters/date_time.hpp(152 ) : see reference to class template instantiation 'boost::phoenix::actor<boost:: log::v2s_mt_nt5::expressions::format_date_time_terminal<T,FallbackPolicyT,CharT>

...

' being compiled with [ T=boost::posix_time::ptime , FallbackPolicyT=boost::log::v2s_mt_nt5::fallback_to_none , CharT=char ] .\main.cpp(20) : see reference to class template instantiation 'boost::l og::v2s_mt_nt5::expressions::format_date_time_actor<boost::posix_time::ptime,boo st::log::v2s_mt_nt5::fallback_to_none,char,boost::phoenix::actor>' being compile d C:\Thirdparty\include\boost/log/expressions/formatters/date_time.hpp(94) : error C3861: 'parse': identifier not found NMAKE : fatal error U1077: '"c:\Program Files (x86)\Microsoft Visual Studio 12.0 \VC\bin\cl.EXE"' : return code '0x2' Stop. NMAKE : fatal error U1077: '"c:\Program Files (x86)\Microsoft Visual Studio 12.0 \VC\bin\nmake.exe"' : return code '0x2' Stop. On Sun, 11 Jan 2015 09:55:13 +0300, Igor Mironchik <igor.mironchik@gmail.com> wrote:

...

Hi guys,

I want to initialize simple log. I do the next:

#include <boost/log/utility/setup/file.hpp> #include <boost/log/trivial.hpp> #include <boost/log/utility/setup/common_attributes.hpp>

void init() { boost::log::add_file_log ( boost::log::keywords::file_name = "sample_%Y%m%d.log", boost::log::keywords::auto_flush = true, boost::log::keywords::open_mode = (std::ios::out | std::ios::app), boost::log::keywords::format = "[%TimeStamp%] [%Severity%]: %Message%" );

boost::log::add_common_attributes(); }

int main(int, char*[]) { init();

BOOST_LOG_TRIVIAL( trace ) << "A trace severity message"; BOOST_LOG_TRIVIAL( debug ) << "A debug severity message"; BOOST_LOG_TRIVIAL( info ) << "An informational severity message"; BOOST_LOG_TRIVIAL( warning ) << "A warning severity message"; BOOST_LOG_TRIVIAL( error ) << "An error severity message"; BOOST_LOG_TRIVIAL( fatal ) << "A fatal severity message";

return 0; }

But in log I receive:

[2015-Jan-11 09:51:04.082221] []: A trace severity message [2015-Jan-11 09:51:04.082221] []: A debug severity message [2015-Jan-11 09:51:04.082221] []: An informational severity message [2015-Jan-11 09:51:04.092221] []: A warning severity message [2015-Jan-11 09:51:04.092221] []: An error severity message [2015-Jan-11 09:51:04.092221] []: A fatal severity message

And my question is how to initialize logging to write severity level in messages?

What do I miss?

Thank you.

-- Best Regards, Igor Mironchik.