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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_SLICE_HPP
#define BOOST_HANA_TEST_AUTO_SLICE_HPP
#include <boost/hana/assert.hpp>
#include <boost/hana/equal.hpp>
#include <boost/hana/integral_constant.hpp>
#include <boost/hana/range.hpp>
#include <boost/hana/slice.hpp>
#include <boost/hana/tuple.hpp>
#include "test_case.hpp"
#include <laws/base.hpp>
#include <support/seq.hpp>
#include <cstddef>
TestCase test_slice{[]{
namespace hana = boost::hana;
using hana::test::ct_eq;
constexpr auto foldable = ::seq;
struct undefined { };
//////////////////////////////////////////////////////////////////////////
// Test with arbitrary indices
//////////////////////////////////////////////////////////////////////////
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::slice(MAKE_TUPLE(),
foldable()),
MAKE_TUPLE()
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::slice(MAKE_TUPLE(undefined{}),
foldable()),
MAKE_TUPLE()
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::slice(MAKE_TUPLE(undefined{}, undefined{}),
foldable()),
MAKE_TUPLE()
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::slice(MAKE_TUPLE(ct_eq<0>{}),
foldable(hana::size_c<0>)),
MAKE_TUPLE(ct_eq<0>{})
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::slice(MAKE_TUPLE(ct_eq<0>{}, undefined{}),
foldable(hana::size_c<0>)),
MAKE_TUPLE(ct_eq<0>{})
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::slice(MAKE_TUPLE(undefined{}, ct_eq<1>{}),
foldable(hana::size_c<1>)),
MAKE_TUPLE(ct_eq<1>{})
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::slice(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}),
foldable(hana::size_c<0>, hana::size_c<1>)),
MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{})
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::slice(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}),
foldable(hana::size_c<1>, hana::size_c<0>)),
MAKE_TUPLE(ct_eq<1>{}, ct_eq<0>{})
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::slice(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}),
foldable(hana::size_c<0>, hana::size_c<0>)),
MAKE_TUPLE(ct_eq<0>{}, ct_eq<0>{})
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::slice(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}),
foldable(hana::size_c<1>, hana::size_c<1>)),
MAKE_TUPLE(ct_eq<1>{}, ct_eq<1>{})
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::slice(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}),
foldable(hana::size_c<0>, hana::size_c<1>, hana::size_c<2>)),
MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{})
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::slice(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}),
foldable(hana::size_c<0>, hana::size_c<2>, hana::size_c<1>)),
MAKE_TUPLE(ct_eq<0>{}, ct_eq<2>{}, ct_eq<1>{})
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::slice(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}),
foldable(hana::size_c<0>, hana::size_c<2>, hana::size_c<1>, hana::size_c<0>)),
MAKE_TUPLE(ct_eq<0>{}, ct_eq<2>{}, ct_eq<1>{}, ct_eq<0>{})
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::slice(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}),
foldable(hana::size_c<0>, hana::size_c<2>, hana::size_c<1>, hana::size_c<0>, hana::size_c<1>)),
MAKE_TUPLE(ct_eq<0>{}, ct_eq<2>{}, ct_eq<1>{}, ct_eq<0>{}, ct_eq<1>{})
));
// Try with a tuple_c
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::slice(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{}),
hana::tuple_c<unsigned, 1, 3, 2>),
MAKE_TUPLE(ct_eq<1>{}, ct_eq<3>{}, ct_eq<2>{})
));
//////////////////////////////////////////////////////////////////////////
// Test with a `range` (check the optimization for contiguous indices)
//////////////////////////////////////////////////////////////////////////
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::slice(MAKE_TUPLE(),
hana::range_c<std::size_t, 0, 0>),
MAKE_TUPLE()
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::slice(MAKE_TUPLE(undefined{}),
hana::range_c<std::size_t, 0, 0>),
MAKE_TUPLE()
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::slice(MAKE_TUPLE(undefined{}, undefined{}),
hana::range_c<std::size_t, 0, 0>),
MAKE_TUPLE()
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::slice(MAKE_TUPLE(ct_eq<0>{}),
hana::range_c<std::size_t, 0, 1>),
MAKE_TUPLE(ct_eq<0>{})
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::slice(MAKE_TUPLE(ct_eq<0>{}, undefined{}),
hana::range_c<std::size_t, 0, 1>),
MAKE_TUPLE(ct_eq<0>{})
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::slice(MAKE_TUPLE(undefined{}, ct_eq<1>{}),
hana::range_c<std::size_t, 1, 2>),
MAKE_TUPLE(ct_eq<1>{})
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::slice(MAKE_TUPLE(undefined{}, ct_eq<1>{}, undefined{}),
hana::range_c<std::size_t, 1, 2>),
MAKE_TUPLE(ct_eq<1>{})
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::slice(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}),
hana::range_c<std::size_t, 0, 2>),
MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{})
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::slice(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}, undefined{}),
hana::range_c<std::size_t, 0, 2>),
MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{})
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::slice(MAKE_TUPLE(undefined{}, ct_eq<1>{}, ct_eq<2>{}),
hana::range_c<std::size_t, 1, 3>),
MAKE_TUPLE(ct_eq<1>{}, ct_eq<2>{})
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::slice(MAKE_TUPLE(undefined{}, ct_eq<1>{}, ct_eq<2>{}, undefined{}),
hana::range_c<std::size_t, 1, 3>),
MAKE_TUPLE(ct_eq<1>{}, ct_eq<2>{})
));
}};
#endif // !BOOST_HANA_TEST_AUTO_SLICE_HPP
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