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42 lines
1.5 KiB
C++
42 lines
1.5 KiB
C++
/*
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@copyright Louis Dionne 2014
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Distributed under the Boost Software License, Version 1.0.
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(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
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*/
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#include <boost/hana/foldable/mcd.hpp>
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#include <boost/hana/detail/constexpr.hpp>
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#include <boost/hana/detail/minimal/foldable.hpp>
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#include <boost/hana/detail/static_assert.hpp>
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#include <boost/hana/integral.hpp>
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#include <tuple>
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using namespace boost::hana;
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BOOST_HANA_CONSTEXPR_LAMBDA auto f = [](auto x, auto xs) {
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return std::tuple_cat(std::make_tuple(x), xs);
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};
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template <typename mcd>
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void test() {
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constexpr auto foldable = detail::minimal::foldable<mcd>;
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constexpr std::tuple<> s;
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BOOST_HANA_STATIC_ASSERT(foldr(f, s, foldable()) == s);
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BOOST_HANA_STATIC_ASSERT(foldr(f, s, foldable(1)) == f(1, s));
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BOOST_HANA_STATIC_ASSERT(foldr(f, s, foldable(1, '2')) == f(1, f('2', s)));
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BOOST_HANA_STATIC_ASSERT(foldr(f, s, foldable(1, '2', 3.3)) == f(1, f('2', f(3.3, s))));
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BOOST_HANA_STATIC_ASSERT(foldr(f, s, foldable(1, '2', 3.3, 4.4f)) == f(1, f('2', f(3.3, f(4.4f, s)))));
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BOOST_HANA_STATIC_ASSERT(foldr(f, s, foldable(int_<0>)) == f(int_<0>, s));
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BOOST_HANA_STATIC_ASSERT(foldr(f, s, foldable(int_<0>, int_<1>)) == f(int_<0>, f(int_<1>, s)));
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BOOST_HANA_STATIC_ASSERT(foldr(f, s, foldable(int_<0>, int_<1>, int_<2>)) == f(int_<0>, f(int_<1>, f(int_<2>, s))));
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BOOST_HANA_STATIC_ASSERT(foldr(f, s, foldable(int_<0>, int_<1>, int_<2>, int_<3>)) == f(int_<0>, f(int_<1>, f(int_<2>, f(int_<3>, s)))));
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}
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int main() {
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test<Foldable::mcd>();
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}
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