ceph/src/boost/libs/mp11/test/mp_map_keys.cpp

   1
   2 // Copyright 2017 Peter Dimov.
   3 //
   4 // Distributed under the Boost Software License, Version 1.0.
   5 //
   6 // See accompanying file LICENSE_1_0.txt or copy at
   7 // http://www.boost.org/LICENSE_1_0.txt
   8
   9
  10 #include <boost/mp11/map.hpp>
  11 #include <boost/mp11/list.hpp>
  12 #include <boost/core/lightweight_test_trait.hpp>
  13 #include <type_traits>
  14 #include <tuple>
  15 #include <utility>
  16
  17 int main()
  18 {
  19     using boost::mp11::mp_map_keys;
  20     using boost::mp11::mp_list;
  21
  22     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_keys<mp_list<>>, mp_list<>>));
  23     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_keys<std::tuple<>>, std::tuple<>>));
  24
  25     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_keys<mp_list<std::pair<int, int const>>>, mp_list<int>>));
  26     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_keys<std::tuple<std::pair<int, int const>>>, std::tuple<int>>));
  27
  28     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_keys<mp_list<std::pair<int, int const>, std::pair<long, long const>>>, mp_list<int, long>>));
  29     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_keys<std::tuple<std::pair<int, int const>, std::pair<long, long const>>>, std::tuple<int, long>>));
  30     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_keys<std::pair<std::pair<int, int const>, std::pair<long, long const>>>, std::pair<int, long>>));
  31
  32     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_keys<mp_list<mp_list<int>, mp_list<long, long>, mp_list<long long, long long, long long>>>, mp_list<int, long, long long>>));
  33     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_keys<std::tuple<mp_list<int>, mp_list<long, long>, mp_list<long long, long long, long long>>>, std::tuple<int, long, long long>>));
  34     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_keys<std::tuple<std::tuple<int>, std::pair<long, long>, std::tuple<long long, long long, long long>>>, std::tuple<int, long, long long>>));
  35
  36     return boost::report_errors();
  37 }