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44 lines
1.3 KiB
C++
44 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/iterable/mcd.hpp>
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#include <boost/hana/detail/constexpr.hpp>
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#include <boost/hana/detail/minimal/comparable.hpp>
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#include <boost/hana/detail/minimal/iterable.hpp>
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#include <boost/hana/detail/static_assert.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 s, auto x) {
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return std::make_tuple(s, x);
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};
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BOOST_HANA_CONSTEXPR_LAMBDA auto f_ = [](auto s, auto x) {
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return f(s(), x());
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};
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template <int i>
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constexpr auto x = detail::minimal::comparable<>(i);
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template <typename mcd>
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void test() {
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constexpr auto iterable = detail::minimal::iterable<mcd>;
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constexpr auto s = x<-1>;
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BOOST_HANA_STATIC_ASSERT(lazy_foldl(f_, s, iterable()) == s);
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BOOST_HANA_STATIC_ASSERT(lazy_foldl(f_, s, iterable(x<0>)) == f(s, x<0>));
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BOOST_HANA_STATIC_ASSERT(lazy_foldl(f_, s, iterable(x<0>, x<1>)) == f(f(s, x<0>), x<1>));
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BOOST_HANA_STATIC_ASSERT(lazy_foldl(f_, s, iterable(x<0>, x<1>, x<2>)) == f(f(f(s, x<0>), x<1>), x<2>));
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BOOST_HANA_STATIC_ASSERT(lazy_foldl(f_, s, iterable(x<0>, x<1>, x<2>, x<3>)) == f(f(f(f(s, x<0>), x<1>), x<2>), x<3>));
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}
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int main() {
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test<Iterable::mcd>();
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}
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