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- // Copyright 2015-2017 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/algorithm.hpp>
- #include <boost/mp11/list.hpp>
- #include <boost/mp11/integral.hpp>
- #include <boost/core/lightweight_test_trait.hpp>
- #include <type_traits>
- #include <tuple>
- struct X1 {};
- struct X2 {};
- struct X3 {};
- using boost::mp11::mp_bool;
- template<class N> using is_even = mp_bool<N::value % 2 == 0>;
- int main()
- {
- using boost::mp11::mp_list;
- using boost::mp11::mp_copy_if;
- {
- using L1 = mp_list<>;
- BOOST_TEST_TRAIT_TRUE((std::is_same<mp_copy_if<L1, std::is_const>, L1>));
- using L2 = mp_list<X1, X1 const, X1*, X2 const, X2*, X3*>;
- BOOST_TEST_TRAIT_TRUE((std::is_same<mp_copy_if<L2, std::is_volatile>, L1>));
- BOOST_TEST_TRAIT_TRUE((std::is_same<mp_copy_if<L2, std::is_const>, mp_list<X1 const, X2 const>>));
- BOOST_TEST_TRAIT_TRUE((std::is_same<mp_copy_if<L2, std::is_pointer>, mp_list<X1*, X2*, X3*>>));
- }
- {
- using L1 = std::tuple<>;
- BOOST_TEST_TRAIT_TRUE((std::is_same<mp_copy_if<L1, std::is_const>, L1>));
- using L2 = std::tuple<X1, X1 const, X1*, X2 const, X2*, X3*>;
- BOOST_TEST_TRAIT_TRUE((std::is_same<mp_copy_if<L2, std::is_volatile>, L1>));
- BOOST_TEST_TRAIT_TRUE((std::is_same<mp_copy_if<L2, std::is_const>, std::tuple<X1 const, X2 const>>));
- BOOST_TEST_TRAIT_TRUE((std::is_same<mp_copy_if<L2, std::is_pointer>, std::tuple<X1*, X2*, X3*>>));
- }
- using boost::mp11::mp_iota_c;
- using boost::mp11::mp_size_t;
- {
- int const N = 12;
- using L1 = mp_iota_c<N>;
- using R1 = mp_copy_if<L1, is_even>;
- BOOST_TEST_TRAIT_TRUE((std::is_same<R1, mp_list<mp_size_t<0>, mp_size_t<2>, mp_size_t<4>, mp_size_t<6>, mp_size_t<8>, mp_size_t<10>>>));
- }
- return boost::report_errors();
- }
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