/*
@copyright Louis Dionne 2014
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/detail/assert.hpp>
#include <boost/hana/foreign.hpp>

#include <array>
#include <test/laws/iterable.hpp>
using namespace boost::hana;


template <int ...i>
constexpr auto array = std::array<int, sizeof...(i)>{{i...}};

int main() {
    // is_empty
    {
        BOOST_HANA_CONSTANT_ASSERT(is_empty(array<>));
        BOOST_HANA_CONSTANT_ASSERT(not_(is_empty(array<0>)));
        BOOST_HANA_CONSTANT_ASSERT(not_(is_empty(array<0, 1>)));
    }

    // head
    {
        BOOST_HANA_CONSTEXPR_ASSERT(head(array<0>) == 0);
        BOOST_HANA_CONSTEXPR_ASSERT(head(array<0, 1>) == 0);
        BOOST_HANA_CONSTEXPR_ASSERT(head(array<0, 1, 2>) == 0);
    }

    // tail
    {
        BOOST_HANA_CONSTANT_ASSERT(equal(tail(array<0>), array<>));
        BOOST_HANA_CONSTEXPR_ASSERT(equal(tail(array<0, 1>), array<1>));
        BOOST_HANA_CONSTEXPR_ASSERT(equal(tail(array<0, 1, 2>), array<1, 2>));
        BOOST_HANA_CONSTEXPR_ASSERT(equal(tail(array<0, 1, 2, 3>), array<1, 2, 3>));
    }

    // laws
    {
        BOOST_HANA_CONSTEXPR_ASSERT(Iterable_laws(
            array<>,
            array<0>,
            array<0, 1>,
            array<0, 1, 2>
        ));
    }
}