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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)
#ifndef BOOST_HANA_TEST_AUTO_DROP_BACK_HPP
#define BOOST_HANA_TEST_AUTO_DROP_BACK_HPP
#include <boost/hana/assert.hpp>
#include <boost/hana/drop_back.hpp>
#include <boost/hana/equal.hpp>
#include <boost/hana/integral_constant.hpp>
#include <laws/base.hpp>
#include "test_case.hpp"
TestCase test_drop_back{[]{
namespace hana = boost::hana;
using hana::test::ct_eq;
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::drop_back(MAKE_TUPLE(), hana::size_c<0>),
MAKE_TUPLE()
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::drop_back(MAKE_TUPLE(), hana::size_c<1>),
MAKE_TUPLE()
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::drop_back(MAKE_TUPLE(), hana::size_c<2>),
MAKE_TUPLE()
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::drop_back(MAKE_TUPLE(ct_eq<0>{}), hana::size_c<0>),
MAKE_TUPLE(ct_eq<0>{})
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::drop_back(MAKE_TUPLE(ct_eq<0>{}), hana::size_c<1>),
MAKE_TUPLE()
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::drop_back(MAKE_TUPLE(ct_eq<0>{}), hana::size_c<2>),
MAKE_TUPLE()
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::drop_back(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}), hana::size_c<0>),
MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{})
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::drop_back(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}), hana::size_c<1>),
MAKE_TUPLE(ct_eq<0>{})
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::drop_back(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}), hana::size_c<2>),
MAKE_TUPLE()
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::drop_back(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}), hana::size_c<0>),
MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{})
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::drop_back(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}), hana::size_c<1>),
MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{})
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::drop_back(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}), hana::size_c<2>),
MAKE_TUPLE(ct_eq<0>{})
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::drop_back(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}), hana::size_c<3>),
MAKE_TUPLE()
));
// make sure hana::drop_back(xs) == hana::drop_back(xs, hana::size_c<1>)
BOOST_HANA_CHECK(hana::equal(
hana::drop_back(MAKE_TUPLE()),
hana::drop_back(MAKE_TUPLE(), hana::size_c<1>)
));
BOOST_HANA_CHECK(hana::equal(
hana::drop_back(MAKE_TUPLE(ct_eq<0>{})),
hana::drop_back(MAKE_TUPLE(ct_eq<0>{}), hana::size_c<1>)
));
BOOST_HANA_CHECK(hana::equal(
hana::drop_back(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{})),
hana::drop_back(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}), hana::size_c<1>)
));
BOOST_HANA_CHECK(hana::equal(
hana::drop_back(MAKE_TUPLE(ct_eq<0>{}, ct_eq<2>{})),
hana::drop_back(MAKE_TUPLE(ct_eq<0>{}, ct_eq<2>{}), hana::size_c<1>)
));
}};
#endif // !BOOST_HANA_TEST_AUTO_DROP_BACK_HPP
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