Re: [Boost-users] [Log] Error with operator<< in basic_formatting_ostream

Subject: Re: [Boost-users] [Log] Error with operator<< in basic_formatting_ostream
From: Johan Lundberg (lundberj_at_[hidden])
Date: 2013-11-05 16:19:58

Hi,

In the tutorial here:
http://www.boost.org/doc/libs/1_54_0/libs/log/doc/html/log/tutorial/formatters.html

There is a link to this example:
http://www.boost.org/doc/libs/1_54_0/libs/log/example/doc/tutorial_fmt_format.cpp

Which I can compile fine like this:
g++ -DBOOST_ALL_DYN_LINK -Lboost-trunk155beta_inst/lib/ -lboost_system
-lboost_log -lboost_filesystem -lboost_thread -I
boost-trunk155beta_inst/include/ boost_log_format.cpp

Could start from that?

    cheers, Johan

2013/11/5 Víctor Yo <rcpoetics_at_[hidden]>

> Hi ewveryone,
>
> I'm working lately with Boost.Log (I'm a newbie) library and I want to
> write a logger with some parameters and formatting options. I followed the
> documentation, I created a backend and a frontend and I tried to format the
> output in the frontend with the set_formatter() function. I tried with the
> Lambda style and with the Boost.Format style but I'm getting an error that
> I can not locate. Iwas working on it for the last two whole days but I
> couldn't find a solution. It is related with the basic_formatting_ostream,
> but I don't understand what that means. I defined the backend and attached
> to it two streams (to a file and to cout)
>
>
>        typedef boost::log::sinks::text_ostream_backend our_backend;
>        typedef boost::log::sinks::synchronous_sink<our_backend>
> our_frontend;
>
>
> //............................................................................................................................................
>
>        boost::shared_ptr<our_backend> backend =
> boost::make_shared<our_backend>();
>        //Stream definitions
>        boost::shared_ptr<std::ostream> stream_out(&std::cout,
> boost::log::empty_deleter());
>        boost::shared_ptr<std::ostream> stream_file(new
> std::ofstream("file_logger.log"));
>        backend -> add_stream(stream_out);
>        backend -> add_stream(stream_file);
>
> Created the frontend (and wrapping the backend to it)
>
>        //Wrap the backend into the frontend and register in the core.
>        //The frontend provides synchronization for the backend.
>        boost::shared_ptr<our_frontend> frontend(new our_frontend(backend));
>
> And now come the offending code which is supposed to format the output
> (note that the first commented block was my first try). None of them works
> and the error is the same in both cases:
>
> */*frontend -> set_formatter*
> *       (*
> *              boost::log::expressions::format("[%1%] %2%, File: %3%,
> Line: %4%  <%5%>: %6% ")*
> *                      % boost::log::attributes::counter< unsigned int
> >(1)*
> *                      % boost::log::attributes::local_clock()*
> *                      % boost::log::expressions::attr< severity_level
> >("Severity")*
> *                      % boost::log::expressions::message*
> *       );*/*
>
>        //We are going to define the formatter in a different style to try
> to get formatted output
>        frontend -> set_formatter
>        (
>   boost::log::expressions::stream
>    << boost::log::attributes::counter< unsigned int >(1)
>   <<" ["<< boost::log::attributes::local_clock()
>   <<"] <"<< boost::log::expressions::attr< severity_level >("Severity")
>   <<"> "<< boost::log::expressions::message
>    );
>
> The error I get is the next one:
>
> */home/victor/Programacion/workspace/opice/build-parallel/../libs/include/boost/log/utility/formatting_ostream.hpp:664:5:
> error: no match for ‘operator<<’ in ‘(&
> strm)->boost::log::v2_mt_posix::basic_formatting_ostream<CharT, TraitsT,
> AllocatorT>::stream [with CharT = char, TraitsT = std::char_traits<char>,
> AllocatorT = std::allocator<char>,
> boost::log::v2_mt_posix::basic_formatting_ostream<CharT, TraitsT,
> AllocatorT>::ostream_type = std::basic_ostream<char>]() << value’*
>
> And I really don't know what is happening. I also included a lot of files
> (I'm sure I included too much files, indeed) to be sure it was not caused
> by some undefined operator or something similar. However I still have the
> same problem. The includes are:
>
> #include <iostream>
> #include <fstream>
> #include <string>
>
> #include <boost/thread/shared_mutex.hpp>
>
> #include <boost/log/core.hpp>
> #include <boost/log/common.hpp>
> #include <boost/make_shared.hpp>
> #include <boost/log/expressions.hpp>
>
> #include <boost/log/utility/setup/file.hpp>
> #include <boost/log/utility/setup/console.hpp>      //puede ser innecesario
> #include <boost/log/utility/setup/common_attributes.hpp>        //puede
> ser innecesario
> #include <boost/log/utility/empty_deleter.hpp>
>
> #include<boost/thread/mutex.hpp>
> #include <boost/log/attributes/timer.hpp>
> #include <boost/log/attributes/mutable_constant.hpp>
> #include <boost/log/sources/severity_logger.hpp>
> #include <boost/log/utility/formatting_ostream.hpp>
>
> #include <boost/log/sinks/text_ostream_backend.hpp>
> #include <boost/log/sinks/sync_frontend.hpp>
>
> #include <boost/log/support/date_time.hpp>
>
> As you can see, they are probably redundant or innecessary but I could rip
> off that files when I could get the program compiled. Now, I'm out of ideas
> so any help you could bring me should be very appreciated. Thank you in
> advance.
>
> Victor Hevia
>
> _______________________________________________
> Boost-users mailing list
> Boost-users_at_[hidden]
> http://lists.boost.org/mailman/listinfo.cgi/boost-users
>