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