68 lines
1.9 KiB
C++
68 lines
1.9 KiB
C++
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// Copyright 2015-2017 Peter Dimov.
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//
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// Distributed under the Boost Software License, Version 1.0.
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//
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// See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt
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#include <boost/mp11/algorithm.hpp>
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#include <boost/mp11/list.hpp>
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#include <boost/mp11/integral.hpp>
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#include <boost/core/lightweight_test_trait.hpp>
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#include <type_traits>
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#include <tuple>
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struct X1 {};
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struct X2 {};
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struct X3 {};
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using boost::mp11::mp_bool;
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template<class N> using is_even = mp_bool<N::value % 2 == 0>;
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int main()
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{
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using boost::mp11::mp_list;
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using boost::mp11::mp_copy_if;
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{
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using L1 = mp_list<>;
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_copy_if<L1, std::is_const>, L1>));
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using L2 = mp_list<X1, X1 const, X1*, X2 const, X2*, X3*>;
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_copy_if<L2, std::is_volatile>, L1>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_copy_if<L2, std::is_const>, mp_list<X1 const, X2 const>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_copy_if<L2, std::is_pointer>, mp_list<X1*, X2*, X3*>>));
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}
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{
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using L1 = std::tuple<>;
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_copy_if<L1, std::is_const>, L1>));
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using L2 = std::tuple<X1, X1 const, X1*, X2 const, X2*, X3*>;
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_copy_if<L2, std::is_volatile>, L1>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_copy_if<L2, std::is_const>, std::tuple<X1 const, X2 const>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_copy_if<L2, std::is_pointer>, std::tuple<X1*, X2*, X3*>>));
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}
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using boost::mp11::mp_iota_c;
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using boost::mp11::mp_size_t;
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{
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int const N = 12;
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using L1 = mp_iota_c<N>;
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using R1 = mp_copy_if<L1, is_even>;
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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>>>));
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}
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return boost::report_errors();
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}
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