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