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