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50 lines
1.8 KiB
C++
50 lines
1.8 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/lazy_foldr_mcd.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/functional.hpp>
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#include <boost/hana/integral.hpp>
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#include <boost/hana/maybe.hpp>
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using namespace boost::hana;
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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 struct { } invalid{};
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BOOST_HANA_STATIC_ASSERT(find(id, foldable()) == nothing);
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BOOST_HANA_STATIC_ASSERT(find(id, foldable(int_<1>)) == just(int_<1>));
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BOOST_HANA_STATIC_ASSERT(find(id, foldable(int_<0>)) == nothing);
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BOOST_HANA_STATIC_ASSERT(find(id, foldable(int_<1>, invalid)) == just(int_<1>));
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BOOST_HANA_STATIC_ASSERT(find(id, foldable(int_<0>, int_<2>)) == just(int_<2>));
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BOOST_HANA_STATIC_ASSERT(find(id, foldable(int_<0>, int_<0>)) == nothing);
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BOOST_HANA_STATIC_ASSERT(find(id, foldable(int_<0>, int_<2>, invalid)) == just(int_<2>));
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BOOST_HANA_STATIC_ASSERT(find(id, foldable(int_<0>, int_<0>, int_<3>)) == just(int_<3>));
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BOOST_HANA_STATIC_ASSERT(find(id, foldable(int_<0>, int_<0>, int_<0>)) == nothing);
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#if 0
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BOOST_HANA_STATIC_ASSERT(find(id, foldable(int{1})) == just(int{1}));
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BOOST_HANA_STATIC_ASSERT(find(id, foldable(int{0})) == nothing);
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BOOST_HANA_STATIC_ASSERT(find(id, foldable(int{1}, long{1})) == just(int{1}));
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BOOST_HANA_STATIC_ASSERT(find(id, foldable(int{1}, long{0})) == just(int{1}));
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BOOST_HANA_STATIC_ASSERT(find(id, foldable(int{0}, long{1})) == just(long{1}));
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BOOST_HANA_STATIC_ASSERT(find(id, foldable(int{0}, long{0})) == nothing);
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#endif
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}
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int main() {
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test<Foldable::lazy_foldr_mcd>();
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}
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