ceph/src/boost/libs/log/example/trivial/main.cpp

   1 /*
   2  *          Copyright Andrey Semashev 2007 - 2015.
   3  * Distributed under the Boost Software License, Version 1.0.
   4  *    (See accompanying file LICENSE_1_0.txt or copy at
   5  *          http://www.boost.org/LICENSE_1_0.txt)
   6  */
   7 /*!
   8  * \file   main.cpp
   9  * \author Andrey Semashev
  10  * \date   07.11.2009
  11  *
  12  * \brief  An example of trivial logging.
  13  */
  14
  15 // #define BOOST_ALL_DYN_LINK 1
  16 // #define BOOST_LOG_DYN_LINK 1
  17
  18 #include <boost/log/trivial.hpp>
  19 #include <boost/log/core.hpp>
  20 #include <boost/log/expressions.hpp>
  21
  22 int main(int argc, char* argv[])
  23 {
  24     // Trivial logging: all log records are written into a file
  25     BOOST_LOG_TRIVIAL(trace) << "A trace severity message";
  26     BOOST_LOG_TRIVIAL(debug) << "A debug severity message";
  27     BOOST_LOG_TRIVIAL(info) << "An informational severity message";
  28     BOOST_LOG_TRIVIAL(warning) << "A warning severity message";
  29     BOOST_LOG_TRIVIAL(error) << "An error severity message";
  30     BOOST_LOG_TRIVIAL(fatal) << "A fatal severity message";
  31
  32     // Filtering can also be applied
  33     using namespace boost::log;
  34
  35     core::get()->set_filter
  36     (
  37         trivial::severity >= trivial::info
  38     );
  39
  40     // Now the first two lines will not pass the filter
  41     BOOST_LOG_TRIVIAL(trace) << "A trace severity message";
  42     BOOST_LOG_TRIVIAL(debug) << "A debug severity message";
  43     BOOST_LOG_TRIVIAL(info) << "An informational severity message";
  44     BOOST_LOG_TRIVIAL(warning) << "A warning severity message";
  45     BOOST_LOG_TRIVIAL(error) << "An error severity message";
  46     BOOST_LOG_TRIVIAL(fatal) << "A fatal severity message";
  47
  48     return 0;
  49 }