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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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