84 lines
2.3 KiB
C++
84 lines
2.3 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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#include <boost/hana/ext/std/array.hpp>
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#include <boost/hana/assert.hpp>
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#include <boost/hana/drop_front_exactly.hpp>
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#include <boost/hana/equal.hpp>
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#include <boost/hana/front.hpp>
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#include <boost/hana/integral_constant.hpp>
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#include <boost/hana/is_empty.hpp>
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#include <boost/hana/not.hpp>
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#include <boost/hana/tuple.hpp>
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#include <laws/base.hpp>
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#include <laws/iterable.hpp>
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#include <array>
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namespace hana = boost::hana;
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template <int ...i>
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constexpr auto array() { return std::array<int, sizeof...(i)>{{i...}}; }
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int main() {
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// is_empty
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{
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BOOST_HANA_CONSTANT_CHECK(hana::is_empty(array<>()));
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BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_empty(array<0>())));
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BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_empty(array<0, 1>())));
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}
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// front
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{
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BOOST_HANA_CONSTEXPR_CHECK(hana::front(array<0>()) == 0);
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BOOST_HANA_CONSTEXPR_CHECK(hana::front(array<0, 1>()) == 0);
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BOOST_HANA_CONSTEXPR_CHECK(hana::front(array<0, 1, 2>()) == 0);
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}
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// drop_front_exactly
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{
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BOOST_HANA_CONSTANT_CHECK(hana::equal(
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hana::drop_front_exactly(array<0>()),
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array<>()
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));
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BOOST_HANA_CONSTEXPR_CHECK(hana::equal(
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hana::drop_front_exactly(array<0, 1>()),
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array<1>()
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));
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BOOST_HANA_CONSTEXPR_CHECK(hana::equal(
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hana::drop_front_exactly(array<0, 1, 2>()),
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array<1, 2>()
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));
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BOOST_HANA_CONSTEXPR_CHECK(hana::equal(
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hana::drop_front_exactly(array<0, 1, 2, 3>()),
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array<1, 2, 3>()
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));
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BOOST_HANA_CONSTEXPR_CHECK(hana::equal(
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hana::drop_front_exactly(array<0, 1, 2, 3>(), hana::size_c<2>),
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array<2, 3>()
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));
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BOOST_HANA_CONSTEXPR_CHECK(hana::equal(
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hana::drop_front_exactly(array<0, 1, 2, 3>(), hana::size_c<3>),
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array<3>()
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));
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}
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// laws
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auto int_arrays = hana::make_tuple(
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array<>()
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, array<0>()
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, array<0, 1>()
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, array<0, 1, 2>()
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, array<0, 1, 2, 3>()
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, array<0, 1, 2, 3, 4>()
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);
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hana::test::TestIterable<hana::ext::std::array_tag>{int_arrays};
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}
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