Ticket #12914: main.cpp

/*
*          Copyright Andrey Semashev 2007 - 2015.
* Distributed under the Boost Software License, Version 1.0.
*    (See accompanying file LICENSE_1_0.txt or copy at
*          http://www.boost.org/LICENSE_1_0.txt)
*/
/*!
* \file   main.cpp
* \author Andrey Semashev
* \date   07.11.2009
*
* \brief  An example of trivial logging.
*/

// #define BOOST_ALL_DYN_LINK 1
// #define BOOST_LOG_DYN_LINK 1

#include <boost/log/trivial.hpp>
#include <boost/log/core.hpp>
#include <boost/log/expressions.hpp>

int main(int argc, char* argv[])
{
    // Trivial logging: all log records are written into a file
    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";

    // Filtering can also be applied
    using namespace boost::log;

    core::get()->set_filter
    (
        trivial::severity >= trivial::info
    );

    // Now the first two lines will not pass the filter
    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;
}