hana/test/optional/less.cpp
2017-01-07 14:14:18 -08:00

53 lines
1.6 KiB
C++

// 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/greater.hpp>
#include <boost/hana/greater_equal.hpp>
#include <boost/hana/less.hpp>
#include <boost/hana/less_equal.hpp>
#include <boost/hana/not.hpp>
#include <boost/hana/optional.hpp>
#include <laws/base.hpp>
namespace hana = boost::hana;
using hana::test::ct_ord;
struct undefined { };
int main() {
BOOST_HANA_CONSTANT_CHECK(hana::nothing < hana::just(undefined{}));
BOOST_HANA_CONSTANT_CHECK(hana::just(ct_ord<3>{}) < hana::just(ct_ord<4>{}));
BOOST_HANA_CONSTANT_CHECK(hana::just(ct_ord<3>{}) <= hana::just(ct_ord<4>{}));
BOOST_HANA_CONSTANT_CHECK(hana::just(ct_ord<4>{}) > hana::just(ct_ord<3>{}));
BOOST_HANA_CONSTANT_CHECK(hana::just(ct_ord<4>{}) >= hana::just(ct_ord<3>{}));
BOOST_HANA_CONSTANT_CHECK(hana::less(
hana::nothing,
hana::just(undefined{})
));
BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::less(
hana::just(undefined{}),
hana::nothing
)));
BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::less(
hana::nothing,
hana::nothing
)));
BOOST_HANA_CONSTANT_CHECK(hana::less(
hana::just(ct_ord<3>{}),
hana::just(ct_ord<4>{})
));
BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::less(
hana::just(ct_ord<3>{}),
hana::just(ct_ord<3>{})
)));
BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::less(
hana::just(ct_ord<4>{}),
hana::just(ct_ord<3>{})
)));
}