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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/assert.hpp>
#include <boost/hana/concat.hpp>
#include <boost/hana/equal.hpp>
#include <boost/hana/optional.hpp>
#include <laws/base.hpp>
namespace hana = boost::hana;
using hana::test::ct_eq;
int main() {
auto rv_nothing = [] { return hana::nothing; }; // rvalue nothing
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::concat(rv_nothing(), hana::nothing),
hana::nothing
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::concat(hana::nothing, rv_nothing()),
hana::nothing
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::concat(rv_nothing(), rv_nothing()),
hana::nothing
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::concat(rv_nothing(), hana::just(ct_eq<0>{})),
hana::just(ct_eq<0>{})
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::concat(hana::just(ct_eq<0>{}), rv_nothing()),
hana::just(ct_eq<0>{})
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::concat(hana::nothing, hana::nothing),
hana::nothing
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::concat(hana::nothing, hana::just(ct_eq<0>{})),
hana::just(ct_eq<0>{})
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::concat(hana::just(ct_eq<0>{}), hana::nothing),
hana::just(ct_eq<0>{})
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::concat(hana::just(ct_eq<0>{}), hana::just(ct_eq<1>{})),
hana::just(ct_eq<0>{})
));
}
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