ceph/src/boost/libs/pfr/test/run/motivating_example.cpp

   1 // Copyright (c) 2016-2020 Antony Polukhin
   2 //
   3 // Distributed under the Boost Software License, Version 1.0. (See accompanying
   4 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   5
   6 // requires: C++14
   7 #include <iostream>
   8 #include "boost/pfr.hpp"
   9
  10 struct my_struct { // no ostream operator defined!
  11     int i;
  12     char c;
  13     double d;
  14 };
  15
  16 int main() {
  17     my_struct s{100, 'H', 3.141593};
  18     std::cout << "my_struct has "
  19         << boost::pfr::tuple_size<my_struct>::value // Outputs: 3
  20         << " fields: "
  21         << boost::pfr::io(s); // Outputs: {100, 'H', 3.141593}
  22 }