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

   1 // Copyright (c) 2016-2022 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 #include <boost/pfr/core.hpp>
   7
   8 #include <boost/core/lightweight_test.hpp>
   9
  10 namespace helper {
  11     template <std::size_t I, class T>
  12     decltype(auto) get(T&& v) {
  13         return boost::pfr::get<I>(std::forward<T>(v));
  14     }
  15 }
  16
  17 int main() {
  18     using namespace std;
  19     using namespace helper;
  20     struct foo { int i; short s;};
  21
  22     foo f{1, 2};
  23     BOOST_TEST_EQ(get<0>(f), 1);
  24
  25     const foo cf{1, 2};
  26     BOOST_TEST_EQ(get<1>(cf), 2);
  27
  28     std::tuple<int, short> t{10, 20};
  29     BOOST_TEST_EQ(get<0>(t), 10);
  30
  31     const std::tuple<int, short> ct{10, 20};
  32     BOOST_TEST_EQ(get<1>(ct), 20);
  33
  34     return boost::report_errors();
  35 }
  36