/*=============================================================================
    Copyright (c) 2018 Kohei Takahashi

    Distributed under the Boost Software License, Version 1.0. (See accompanying
    file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
==============================================================================*/

#include <boost/fusion/sequence/intrinsic/at.hpp>
#include <boost/fusion/container/vector.hpp>
#include <boost/fusion/container/list.hpp>
#include <boost/fusion/container/deque.hpp>
#include <boost/fusion/tuple/tuple.hpp>
#include <boost/core/lightweight_test.hpp>

template <typename Sequence>
void test_at()
{
    Sequence seq;

    // zero initialized
    BOOST_TEST(boost::fusion::at_c<0>(seq)[0] == 0);
    BOOST_TEST(boost::fusion::at_c<0>(seq)[1] == 0);
    BOOST_TEST(boost::fusion::at_c<0>(seq)[2] == 0);

    int (&arr)[3] = boost::fusion::deref(boost::fusion::begin(seq));

    arr[0] = 2;
    arr[1] = 4;
    arr[2] = 6;

    BOOST_TEST(boost::fusion::at_c<0>(seq)[0] == 2);
    BOOST_TEST(boost::fusion::at_c<0>(seq)[1] == 4);
    BOOST_TEST(boost::fusion::at_c<0>(seq)[2] == 6);

    boost::fusion::at_c<0>(seq)[1] = 42;

    BOOST_TEST(boost::fusion::at_c<0>(seq)[0] == 2);
    BOOST_TEST(boost::fusion::at_c<0>(seq)[1] == 42);
    BOOST_TEST(boost::fusion::at_c<0>(seq)[2] == 6);
}

int main()
{
    using namespace boost::fusion;

    test_at<vector<int[3]> >();
    test_at<deque<int[3]> >();
    test_at<list<int[3]> >();
    test_at<tuple<int[3]> >();
}