forked from boostorg/mp11
96 lines
4.1 KiB
C++
96 lines
4.1 KiB
C++
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// Copyright 2015 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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#include <utility>
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struct X1 {};
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struct X2 {};
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struct X3 {};
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struct X4 {};
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struct X5 {};
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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_take;
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using boost::mp11::mp_take_c;
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using boost::mp11::mp_size_t;
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{
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using L1 = mp_list<>;
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take_c<L1, 0>, L1>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take<L1, mp_size_t<0>>, L1>));
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using L2 = mp_list<X1, X2, X3, X4, X5>;
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take_c<L2, 0>, mp_list<>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take_c<L2, 1>, mp_list<X1>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take_c<L2, 2>, mp_list<X1, X2>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take_c<L2, 3>, mp_list<X1, X2, X3>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take_c<L2, 4>, mp_list<X1, X2, X3, X4>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take_c<L2, 5>, mp_list<X1, X2, X3, X4, X5>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take<L2, mp_size_t<0>>, mp_list<>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take<L2, mp_size_t<1>>, mp_list<X1>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take<L2, mp_size_t<2>>, mp_list<X1, X2>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take<L2, mp_size_t<3>>, mp_list<X1, X2, X3>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take<L2, mp_size_t<4>>, mp_list<X1, X2, X3, X4>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take<L2, mp_size_t<5>>, mp_list<X1, X2, X3, X4, X5>>));
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using L3 = mp_list<X1, X2, X3, X4, X5, X1, X2, X3, X4, X5, X1, X2, X3, X4, X5, X1, X2, X3, X4, X5>;
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take_c<L3, 8>, mp_list<X1, X2, X3, X4, X5, X1, X2, X3>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take<L3, mp_size_t<9>>, mp_list<X1, X2, X3, X4, X5, X1, X2, X3, X4>>));
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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_take_c<L1, 0>, L1>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take<L1, mp_size_t<0>>, L1>));
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using L2 = std::tuple<X1, X2, X3, X4, X5>;
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take_c<L2, 0>, std::tuple<>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take_c<L2, 1>, std::tuple<X1>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take_c<L2, 2>, std::tuple<X1, X2>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take_c<L2, 3>, std::tuple<X1, X2, X3>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take_c<L2, 4>, std::tuple<X1, X2, X3, X4>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take_c<L2, 5>, std::tuple<X1, X2, X3, X4, X5>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take<L2, mp_size_t<0>>, std::tuple<>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take<L2, mp_size_t<1>>, std::tuple<X1>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take<L2, mp_size_t<2>>, std::tuple<X1, X2>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take<L2, mp_size_t<3>>, std::tuple<X1, X2, X3>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take<L2, mp_size_t<4>>, std::tuple<X1, X2, X3, X4>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take<L2, mp_size_t<5>>, std::tuple<X1, X2, X3, X4, X5>>));
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using L3 = std::tuple<X1, X2, X3, X4, X5, X1, X2, X3, X4, X5, X1, X2, X3, X4, X5, X1, X2, X3, X4, X5>;
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take_c<L3, 8>, std::tuple<X1, X2, X3, X4, X5, X1, X2, X3>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take<L3, mp_size_t<9>>, std::tuple<X1, X2, X3, X4, X5, X1, X2, X3, X4>>));
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}
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{
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using L1 = std::pair<X1, X2>;
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take_c<L1, 2>, L1>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_take<L1, mp_size_t<2>>, L1>));
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}
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return boost::report_errors();
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}
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