hana/test/ext/std/array.cpp

/*
@copyright Louis Dionne 2015
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/assert.hpp>
#include <boost/hana/ext/std/array.hpp>
#include <boost/hana/tuple.hpp>

#include <laws/base.hpp>
#include <laws/comparable.hpp>
#include <laws/foldable.hpp>
#include <laws/iterable.hpp>
#include <laws/orderable.hpp>
#include <laws/searchable.hpp>

#include <array>
using namespace boost::hana;


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

using test::ct_eq;

int main() {
    auto int_arrays = make<tuple_tag>(
          array<>()
        , array<0>()
        , array<0, 1>()
        , array<0, 1, 2>()
        , array<0, 1, 2, 3>()
        , array<0, 1, 2, 3, 4>()
    );
    (void)int_arrays;

#if BOOST_HANA_TEST_PART == 1
    //////////////////////////////////////////////////////////////////////////
    // Comparable
    //////////////////////////////////////////////////////////////////////////
    test::TestComparable<ext::std::Array>{int_arrays};

#elif BOOST_HANA_TEST_PART == 2
    //////////////////////////////////////////////////////////////////////////
    // Orderable
    //////////////////////////////////////////////////////////////////////////
    test::TestOrderable<ext::std::Array>{int_arrays};

#elif BOOST_HANA_TEST_PART == 3
    //////////////////////////////////////////////////////////////////////////
    // Foldable
    //////////////////////////////////////////////////////////////////////////
    test::TestFoldable<ext::std::Array>{int_arrays};

#elif BOOST_HANA_TEST_PART == 4
    //////////////////////////////////////////////////////////////////////////
    // Iterable
    //////////////////////////////////////////////////////////////////////////
    {
        // is_empty
        {
            BOOST_HANA_CONSTANT_CHECK(is_empty(array<>()));
            BOOST_HANA_CONSTANT_CHECK(not_(is_empty(array<0>())));
            BOOST_HANA_CONSTANT_CHECK(not_(is_empty(array<0, 1>())));
        }

        // front
        {
            BOOST_HANA_CONSTEXPR_CHECK(front(array<0>()) == 0);
            BOOST_HANA_CONSTEXPR_CHECK(front(array<0, 1>()) == 0);
            BOOST_HANA_CONSTEXPR_CHECK(front(array<0, 1, 2>()) == 0);
        }

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

        // laws
        test::TestIterable<ext::std::Array>{int_arrays};
    }

#elif BOOST_HANA_TEST_PART == 5
    //////////////////////////////////////////////////////////////////////////
    // Searchable
    //////////////////////////////////////////////////////////////////////////
    {
        auto eq_arrays = make<tuple_tag>(
              std::array<ct_eq<0>, 0>{}
            , std::array<ct_eq<0>, 1>{}
            , std::array<ct_eq<0>, 2>{}
            , std::array<ct_eq<0>, 3>{}
            , std::array<ct_eq<0>, 4>{}
        );

        auto eq_keys = make<tuple_tag>(ct_eq<0>{});

        test::TestSearchable<ext::std::Array>{eq_arrays, eq_keys};
    }
#endif
}