forked from boostorg/mp11
92 lines
3.1 KiB
C++
92 lines
3.1 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 <boost/config.hpp>
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#include <boost/detail/workaround.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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struct X4 {};
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template<class T1, class T2> struct F {};
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using boost::mp11::mp_push_back;
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using boost::mp11::mp_push_front;
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template<class T, class L> using rev_push_back = mp_push_back<L, T>;
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template<class T, class L> using rev_push_front = mp_push_front<L, T>;
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#if BOOST_WORKAROUND( BOOST_GCC, < 40800 )
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template<class A, class B> using mp_plus = std::integral_constant<typename std::remove_const<decltype( A::value + B::value )>::type, A::value + B::value>;
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#else
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using boost::mp11::mp_plus;
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#endif
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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_reverse_fold;
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{
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_reverse_fold<mp_list<>, void, F>, void>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_reverse_fold<mp_list<X1>, void, F>, F<X1, void>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_reverse_fold<mp_list<X1, X2>, void, F>, F<X1, F<X2, void>>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_reverse_fold<mp_list<X1, X2, X3>, void, F>, F<X1, F<X2, F<X3, void>>>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_reverse_fold<mp_list<X1, X2, X3, X4>, void, F>, F<X1, F<X2, F<X3, F<X4, void>>>>>));
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}
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{
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_reverse_fold<std::tuple<>, void, F>, void>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_reverse_fold<std::tuple<X1>, void, F>, F<X1, void>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_reverse_fold<std::tuple<X1, X2>, void, F>, F<X1, F<X2, void>>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_reverse_fold<std::tuple<X1, X2, X3>, void, F>, F<X1, F<X2, F<X3, void>>>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_reverse_fold<std::tuple<X1, X2, X3, X4>, void, F>, F<X1, F<X2, F<X3, F<X4, void>>>>>));
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}
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{
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_reverse_fold<std::tuple<X1, X2, X3, X4>, mp_list<>, rev_push_back>, mp_list<X4, X3, X2, X1>>));
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}
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{
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_reverse_fold<std::tuple<X1, X2, X3, X4>, mp_list<>, rev_push_front>, mp_list<X1, X2, X3, X4>>));
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}
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using boost::mp11::mp_iota_c;
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using boost::mp11::mp_reverse;
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using boost::mp11::mp_size_t;
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{
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int const N = 37;
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using L = mp_iota_c<N>;
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using R1 = mp_reverse_fold<L, mp_list<>, rev_push_front>;
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BOOST_TEST_TRAIT_TRUE((std::is_same<R1, L>));
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using R2 = mp_reverse_fold<L, mp_list<>, rev_push_back>;
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BOOST_TEST_TRAIT_TRUE((std::is_same<R2, mp_reverse<L>>));
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using R3 = mp_reverse_fold<L, mp_size_t<0>, mp_plus>;
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BOOST_TEST_TRAIT_TRUE((std::is_same<R3, mp_size_t<N*(N-1)/2>>));
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}
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return boost::report_errors();
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}
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