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- // Copyright 2017 Peter Dimov.
- //
- // Distributed under the Boost Software License, Version 1.0.
- //
- // See accompanying file LICENSE_1_0.txt or copy at
- // http://www.boost.org/LICENSE_1_0.txt
- #include <boost/mp11/map.hpp>
- #include <boost/mp11/list.hpp>
- #include <boost/core/lightweight_test_trait.hpp>
- #include <type_traits>
- #include <tuple>
- #include <utility>
- int main()
- {
- using boost::mp11::mp_map_keys;
- using boost::mp11::mp_list;
- BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_keys<mp_list<>>, mp_list<>>));
- BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_keys<std::tuple<>>, std::tuple<>>));
- BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_keys<mp_list<std::pair<int, int const>>>, mp_list<int>>));
- BOOST_TEST_TRAIT_TRUE((std::is_same<mp_map_keys<std::tuple<std::pair<int, int const>>>, std::tuple<int>>));
- 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>>));
- 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>>));
- 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>>));
- 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>>));
- 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>>));
- 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>>));
- return boost::report_errors();
- }
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