94 lines
2.5 KiB
C++
94 lines
2.5 KiB
C++
// Copyright Louis Dionne 2013-2017
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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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#include <boost/hana/detail/variadic/at.hpp>
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#include <boost/hana/assert.hpp>
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#include <boost/hana/equal.hpp>
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#include <laws/base.hpp>
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namespace hana = boost::hana;
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namespace vd = hana::detail::variadic;
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using hana::test::ct_eq;
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struct non_pod { virtual ~non_pod() { } };
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template <int i> struct y { };
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int main() {
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BOOST_HANA_CONSTANT_CHECK(hana::equal(
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vd::at<0>(ct_eq<0>{}),
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ct_eq<0>{}
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));
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BOOST_HANA_CONSTANT_CHECK(hana::equal(
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vd::at<0>(ct_eq<0>{}, ct_eq<1>{}),
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ct_eq<0>{}
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));
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BOOST_HANA_CONSTANT_CHECK(hana::equal(
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vd::at<1>(y<0>{}, ct_eq<1>{}),
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ct_eq<1>{}
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));
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BOOST_HANA_CONSTANT_CHECK(hana::equal(
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vd::at<0>(ct_eq<0>{}, y<1>{}, y<2>{}),
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ct_eq<0>{}
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));
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BOOST_HANA_CONSTANT_CHECK(hana::equal(
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vd::at<1>(y<0>{}, ct_eq<1>{}, y<2>{}),
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ct_eq<1>{}
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));
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BOOST_HANA_CONSTANT_CHECK(hana::equal(
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vd::at<2>(y<0>{}, y<1>{}, ct_eq<2>{}),
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ct_eq<2>{}
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));
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BOOST_HANA_CONSTANT_CHECK(hana::equal(
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vd::at<0>(ct_eq<0>{}, y<1>{}, y<2>{}, y<3>{}),
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ct_eq<0>{}
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));
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BOOST_HANA_CONSTANT_CHECK(hana::equal(
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vd::at<1>(y<0>{}, ct_eq<1>{}, y<2>{}, y<3>{}),
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ct_eq<1>{}
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));
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BOOST_HANA_CONSTANT_CHECK(hana::equal(
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vd::at<2>(y<0>{}, y<1>{}, ct_eq<2>{}, y<3>{}),
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ct_eq<2>{}
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));
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BOOST_HANA_CONSTANT_CHECK(hana::equal(
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vd::at<3>(y<0>{}, y<1>{}, y<2>{}, ct_eq<3>{}),
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ct_eq<3>{}
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));
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BOOST_HANA_CONSTANT_CHECK(hana::equal(
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vd::at<0>(ct_eq<0>{}, y<1>{}, y<2>{}, y<3>{}, y<4>{}),
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ct_eq<0>{}
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));
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BOOST_HANA_CONSTANT_CHECK(hana::equal(
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vd::at<1>(y<0>{}, ct_eq<1>{}, y<2>{}, y<3>{}, y<4>{}),
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ct_eq<1>{}
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));
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BOOST_HANA_CONSTANT_CHECK(hana::equal(
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vd::at<2>(y<0>{}, y<1>{}, ct_eq<2>{}, y<3>{}, y<4>{}),
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ct_eq<2>{}
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));
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BOOST_HANA_CONSTANT_CHECK(hana::equal(
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vd::at<3>(y<0>{}, y<1>{}, y<2>{}, ct_eq<3>{}, y<4>{}),
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ct_eq<3>{}
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));
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BOOST_HANA_CONSTANT_CHECK(hana::equal(
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vd::at<4>(y<0>{}, y<1>{}, y<2>{}, y<3>{}, ct_eq<4>{}),
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ct_eq<4>{}
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));
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// make sure we can use non-pods on both side of the fetched object
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vd::at<0>(ct_eq<0>{}, non_pod{});
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vd::at<1>(non_pod{}, ct_eq<1>{});
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// make sure it works with const objects
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int const i = 1;
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vd::at<0>(i);
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}
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