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- // Copyright Louis Dionne 2013-2017
- // Distributed under the Boost Software License, Version 1.0.
- // (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
- #include <boost/hana/detail/variadic/at.hpp>
- #include <boost/hana/assert.hpp>
- #include <boost/hana/equal.hpp>
- #include <laws/base.hpp>
- namespace hana = boost::hana;
- namespace vd = hana::detail::variadic;
- using hana::test::ct_eq;
- struct non_pod { virtual ~non_pod() { } };
- template <int i> struct y { };
- int main() {
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- vd::at<0>(ct_eq<0>{}),
- ct_eq<0>{}
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- vd::at<0>(ct_eq<0>{}, ct_eq<1>{}),
- ct_eq<0>{}
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- vd::at<1>(y<0>{}, ct_eq<1>{}),
- ct_eq<1>{}
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- vd::at<0>(ct_eq<0>{}, y<1>{}, y<2>{}),
- ct_eq<0>{}
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- vd::at<1>(y<0>{}, ct_eq<1>{}, y<2>{}),
- ct_eq<1>{}
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- vd::at<2>(y<0>{}, y<1>{}, ct_eq<2>{}),
- ct_eq<2>{}
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- vd::at<0>(ct_eq<0>{}, y<1>{}, y<2>{}, y<3>{}),
- ct_eq<0>{}
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- vd::at<1>(y<0>{}, ct_eq<1>{}, y<2>{}, y<3>{}),
- ct_eq<1>{}
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- vd::at<2>(y<0>{}, y<1>{}, ct_eq<2>{}, y<3>{}),
- ct_eq<2>{}
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- vd::at<3>(y<0>{}, y<1>{}, y<2>{}, ct_eq<3>{}),
- ct_eq<3>{}
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- vd::at<0>(ct_eq<0>{}, y<1>{}, y<2>{}, y<3>{}, y<4>{}),
- ct_eq<0>{}
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- vd::at<1>(y<0>{}, ct_eq<1>{}, y<2>{}, y<3>{}, y<4>{}),
- ct_eq<1>{}
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- vd::at<2>(y<0>{}, y<1>{}, ct_eq<2>{}, y<3>{}, y<4>{}),
- ct_eq<2>{}
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- vd::at<3>(y<0>{}, y<1>{}, y<2>{}, ct_eq<3>{}, y<4>{}),
- ct_eq<3>{}
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- vd::at<4>(y<0>{}, y<1>{}, y<2>{}, y<3>{}, ct_eq<4>{}),
- ct_eq<4>{}
- ));
- // make sure we can use non-pods on both side of the fetched object
- vd::at<0>(ct_eq<0>{}, non_pod{});
- vd::at<1>(non_pod{}, ct_eq<1>{});
- // make sure it works with const objects
- int const i = 1;
- vd::at<0>(i);
- }
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