80 lines
2.3 KiB
C++
80 lines
2.3 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/detail/config.hpp>
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#if BOOST_MP11_MSVC
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# pragma warning( disable: 4503 ) // decorated name length exceeded
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#endif
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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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using boost::mp11::mp_bool;
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template<class T> using is_even = mp_bool< T::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_count_if;
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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_count_if<L1, std::is_const>, mp_size_t<0>>));
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using L2 = mp_list<X1, X1 const, X1*, X1 const, X1*, X1*>;
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_count_if<L2, std::is_volatile>, mp_size_t<0>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_count_if<L2, std::is_const>, mp_size_t<2>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_count_if<L2, std::is_pointer>, mp_size_t<3>>));
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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_count_if<L1, std::is_const>, mp_size_t<0>>));
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using L2 = std::tuple<X1, X1 const, X1*, X1 const, X1*, X1*>;
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_count_if<L2, std::is_volatile>, mp_size_t<0>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_count_if<L2, std::is_const>, mp_size_t<2>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_count_if<L2, std::is_pointer>, mp_size_t<3>>));
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}
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{
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using L2 = std::pair<X1 const, X1*>;
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_count_if<L2, std::is_volatile>, mp_size_t<0>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_count_if<L2, std::is_const>, mp_size_t<1>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_count_if<L2, std::is_pointer>, mp_size_t<1>>));
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}
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{
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using boost::mp11::mp_iota_c;
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int const N = 1089;
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using L = mp_iota_c<N>;
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using R = mp_count_if<L, is_even>;
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BOOST_TEST_TRAIT_TRUE((std::is_same<R, mp_size_t<(N + 1) / 2>>));
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}
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return boost::report_errors();
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}
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