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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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