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39 lines
1.3 KiB
C++
39 lines
1.3 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 <tuple>
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#include "minimal_foldable.hpp"
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using namespace boost::hana;
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BOOST_HANA_CONSTEXPR_LAMBDA auto f = [](auto xs, auto x) {
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return std::tuple_cat(xs, std::make_tuple(x));
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};
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int main() {
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{
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constexpr auto s = std::make_tuple(1);
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BOOST_HANA_STATIC_ASSERT(foldl1(f, foldable(s)) == s);
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BOOST_HANA_STATIC_ASSERT(foldl1(f, foldable(s, '2')) == f(s, '2'));
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BOOST_HANA_STATIC_ASSERT(foldl1(f, foldable(s, '2', 3.3)) == f(f(s, '2'), 3.3));
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BOOST_HANA_STATIC_ASSERT(foldl1(f, foldable(s, '2', 3.3, 4.4f)) == f(f(f(s, '2'), 3.3), 4.4f));
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}
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{
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constexpr auto s = std::make_tuple(int_<1>);
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BOOST_HANA_STATIC_ASSERT(foldl1(f, foldable(s)) == s);
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BOOST_HANA_STATIC_ASSERT(foldl1(f, foldable(s, int_<2>)) == f(s, int_<2>));
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BOOST_HANA_STATIC_ASSERT(foldl1(f, foldable(s, int_<2>, int_<3>)) == f(f(s, int_<2>), int_<3>));
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BOOST_HANA_STATIC_ASSERT(foldl1(f, foldable(s, int_<2>, int_<3>, int_<4>)) == f(f(f(s, int_<2>), int_<3>), int_<4>));
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}
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}
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