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37 lines
1.4 KiB
C++
37 lines
1.4 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.hpp>
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#include <boost/hana/detail/constexpr.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 "minimal_foldable.hpp"
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#include <tuple>
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using namespace boost::hana;
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BOOST_HANA_CONSTEXPR_LAMBDA auto tup = [](auto ...xs) {
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return std::make_tuple(xs...);
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};
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BOOST_HANA_CONSTEXPR_LAMBDA auto f = [](auto x, auto xs) {
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return std::tuple_cat(tup(x), xs);
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};
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int main() {
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BOOST_HANA_STATIC_ASSERT(foldr1(f, foldable(tup(1))) == tup(1));
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BOOST_HANA_STATIC_ASSERT(foldr1(f, foldable(1, tup('2'))) == f(1, tup('2')));
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BOOST_HANA_STATIC_ASSERT(foldr1(f, foldable(1, '2', tup(3.3))) == f(1, f('2', tup(3.3))));
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BOOST_HANA_STATIC_ASSERT(foldr1(f, foldable(1, '2', 3.3, tup(4.4f))) == f(1, f('2', f(3.3, tup(4.4f)))));
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BOOST_HANA_STATIC_ASSERT(foldr1(f, foldable(tup(int_<1>))) == tup(int_<1>));
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BOOST_HANA_STATIC_ASSERT(foldr1(f, foldable(int_<1>, tup(int_<2>))) == f(int_<1>, tup(int_<2>)));
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BOOST_HANA_STATIC_ASSERT(foldr1(f, foldable(int_<1>, int_<2>, tup(int_<3>))) == f(int_<1>, f(int_<2>, tup(int_<3>))));
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BOOST_HANA_STATIC_ASSERT(foldr1(f, foldable(int_<1>, int_<2>, int_<3>, tup(int_<4>))) == f(int_<1>, f(int_<2>, f(int_<3>, tup(int_<4>)))));
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}
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