ceph/src/boost/libs/log/example/doc/util_manip_to_log.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 #include <cstddef>
   9 #include <iomanip>
  10 #include <iostream>
  11 #include <boost/log/utility/formatting_ostream.hpp>
  12 #include <boost/log/utility/manipulators/to_log.hpp>
  13
  14 namespace logging = boost::log;
  15
  16 //[ example_utility_manipulators_to_log
  17 std::ostream& operator<<
  18 (
  19     std::ostream& strm,
  20     logging::to_log_manip< int > const& manip
  21 )
  22 {
  23     strm << std::setw(4) << std::setfill('0') << std::hex << manip.get() << std::dec;
  24     return strm;
  25 }
  26
  27 void test_manip()
  28 {
  29     std::cout << "Regular output: " << 1010 << std::endl;
  30     std::cout << "Log output: " << logging::to_log(1010) << std::endl;
  31 }
  32 //]
  33
  34 //[ example_utility_manipulators_to_log_with_tag
  35 struct tag_A;
  36 struct tag_B;
  37
  38 std::ostream& operator<<
  39 (
  40     std::ostream& strm,
  41     logging::to_log_manip< int, tag_A > const& manip
  42 )
  43 {
  44     strm << "A[" << manip.get() << "]";
  45     return strm;
  46 }
  47
  48 std::ostream& operator<<
  49 (
  50     std::ostream& strm,
  51     logging::to_log_manip< int, tag_B > const& manip
  52 )
  53 {
  54     strm << "B[" << manip.get() << "]";
  55     return strm;
  56 }
  57
  58 void test_manip_with_tag()
  59 {
  60     std::cout << "Regular output: " << 1010 << std::endl;
  61     std::cout << "Log output A: " << logging::to_log< tag_A >(1010) << std::endl;
  62     std::cout << "Log output B: " << logging::to_log< tag_B >(1010) << std::endl;
  63 }
  64 //]
  65
  66
  67 int main(int, char*[])
  68 {
  69     test_manip();
  70     test_manip_with_tag();
  71
  72     return 0;
  73 }